Vickers Valves CM2, CM11, RM3 & FM3 Control Valvespub/@eaton/@hyd/... · Revised 4/96 303 CM2, CM11, RM3 & FM3 Control Valves For Mobile Equipment Vickers® Valves

303Revised 4/96

CM2, CM11, RM3 & FM3 Control ValvesFor Mobile Equipment

Vickers®

Valves

2

Introduction

The directional valves described in thisbooklet are more than just directionalvalves -- they are hydraulic controlsystems. Their function is to controldirection of flow, rate of flow andpressure.

Through the use of various valvecircuitry, logic circuitry can be provided

for automatic sequencing operations.Sequencing operations can be eitherpressure or position-actuated. Vickersvalves are also designed to permit theoperation of many functions from asingle pumping source. These and themany other features provide the“building blocks” for a control system forany piece of mobile equipment.

Vickers has the worldwide facilities andskilled personnel to give you qualityproducts, prompt delivery, plusapplication and service assistance. Youcan depend on Vickers for the finesthydraulic products and service.

ContentsMultiple Section Directional Valves

CM2 and CM11 SeriesGeneral Description 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Benefits 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . System Relief Valve 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cylinder Port Valving 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Inlet Sections 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Outlet Sections 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Narrow Bypass Sections 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spools 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spool Symbols 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spool Orientation 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spool Detents 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Detent Conversion Kit 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Optional Centering Springs 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hydraulic Actuators 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electric Switch 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electric Switch Conversion Kit 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Two-pressure System 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lever Linkage Adapter 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lever Kits 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mixture of Port Sizes 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dust Covers 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Viton Seals 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Specifications 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Typical Performance 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Performance Data Curves 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation Dimensions

CM2 Series 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CM11 Series 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Model CodesCM2 Series 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CM11 Series 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pressure and Flow Control Valves

RM3 and FM3 SeriesDescription 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Performance Curves 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation Dimensions 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Model Code 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Application Guidelines 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3

Multiple Section Directional Valves

General DescriptionThese manually and hydraulicallyactuated, spring centered, spool typevalves are designed for pressures up to210 bar (3000 psi) and flows up to 265l/min (70 USgpm). They are comprisedof sections that are internally connectedto common pressure and tank return

passages. Seals between the sectionsseal the connecting passages, and thesections are held together by studs andnuts.

Valve sections are available asassembled banks, and as separate

sections for customers to assemble intobanks or to add to or change thefunctions of a bank. The followingillustration shows the construction andassembly of a three-section valve.

ReliefValve

InletBody

SealRings

CenteringSpring

SwitchBracket

CenterBody

Spool

OutletBody

Tie Stud

CheckValve

Cam

4


End sections of multiple-spool valvescontain the inlet or outlet porting and aspool. Eight spools can be addedbetween end sections for a maximum often operating sections per valve bank.

For single-spool valves the spool islocated in the inlet end section, and ano-spool outlet plate is used.

The following illustration shows the inletand outlet ports and the bypass,pressure and tank passages of a typicalthree-section valve. The pressurepassage carries fluid to cylinder portswhen the spools are shifted. The bypasspassage permits flow directly to theoutlet when the spools re not beingoperated. The tank passage also carriesfluid to the outlet; either return flow fromthe cylinder ports or fluid diverted pastthe flow control and relief valve.

Spools are shown in the centered orneutral position. Under these conditions,fluid in the pressure passage is blockedfrom cylinder ports by the spool lands.Flow through the valve is through thebypass and tank passages to the outlet.

A

B

A

B B

A

Control Valve Sensing OrificeBypass Flow Control Orifice

Pressure Passage

Flow Control& Relief Valve

Cylinder PortsTank PassageBypass Passage

OutCenter

InInlet Outlet

“T” “B”

“D”

When a spool is shifted, flow is asdescribed in the “spools” section onpage 9.

All sectional valves have internal parallelcircuitry. All pump flow can be used forany one work function. If two or morespools are shifted simultaneously, flowwill go to the function requiring thelowest pressure. Flow can be controlledto multiple functions by metering thespools.

Valve banks can be connected inparallel or series-parallel. Spools in thesecond bank can be operated whenspools in the first bank are in the neutralor operating position.

Minimum leakage –selective fit

Improvedmetering fromcylinder to tankport

Outstanding meteringfrom pressure tocylinder ports

Integral checks onevery valve sectionprevent cylinderbacksliding with theload

Extra largeinternalpassages

Each valve section, except those with a“B” spool, includes a load-drop checkvalve to prevent a load from droppingwhen an operating spool is shifted. Aload-drop check can be provided in “B”spool sections for special applications.

BenefitsSmooth Operation – Vickers manuallyoperated sectional valves offer absolutesmoothness both in raising and loweringloads. In addition to outstandingmetering from pressure to cylinder ports,they have equally precise meteringcapability from cylinder to tank port.

High Work Capacity – Littlehorsepower is consumed in the valvedue to low pressure drop. On manyengine-powered vehicles this gives thepotential for low heat rise from valvehydraulic flow losses in areas whereexcess heat may already be a problem.

On electric battery-powered vehicles,valuable amphere hours are savedbecause energy wasted through heatloss is reduced. More fluid power isavailable to perform work.

Installation and Service Flexibility –Multiple section design providesinstallation and service flexibility. Valvescan be maintained or modified readilyand at low cost in the field. Three-pointmounting aids installation stability whenthe valve is mounted on an irregularsurface.

Versatile Sectional Design

High Strength Castings – Cast ironvalve bodies reduce deflection so thateven under the most arduous operatingconditions there is no spool bind frompressure. Internal passages areshell-cored to provide streamlinedhydraulic passages for minimumpressure drop.

Positive “O” ringseal between

sections insuresleak-free

operation.Elimination ofspacer plates

reducesstresses,

permits precisealignmentbetweensections.

Cast fulcrumon each valvesection forrigidity

High strength iron casting reducesinternal stresses, insures smoothoperation of spool

Integral System Protection – Anintegral cartridge type relief valve isprovided in the valve inlet for systemprotection. Pressure settings are presetto your specifications to providetamper-free installations.

LiftCyl. Atmos.

TiltCyl.

Adj.

5


System Relief Valve“R” and “K” inlet sections are providedwith an integral, cartridge type reliefvalve for system protection. Crackingpressure is preset to your requirement.Settings are available from 35-210 bar(500-3000 psi) in increments of 17 bar(250 psi).

Tamperproof relief valve preset from35-210 bar (500-3000 psi), in 17 bar(250 psi) increments

Production-proved,pilot operated relief valve

Externally Vented System ReliefValve – This CM11 valve option consistsof a tapped hole in the SAE plug whichholds the relief valve in its bore. Thisfeature thus provides a means forremotely diverting pump flow to tank tounload the system.

Externally Adjustable System ReliefValve – An externally adjustable systemrelief valve is available for CM2 andCM11 valves. This option is provided byadding a second, externally adjustablepilot stage to control the systempressure at which the main relief shiftsand directs pump flow to tank. Thesecond pilot stage is adjustable tocontrol system pressure up to 17 bar(250 psi) below the main relief setting.

In effect, the standard relief valve pilotstage acts as a safety limit. Theoperator cannot exceed the vehicle’smaximum intended load rating. Theoptional adjustment feature, however,allows simple adjustment of systempressure after the valve is installed inthe vehicle and under actual load-liftingconditions. It also permits adjustment forminimum pressure to meet vehicleratings, for example, providing a meansto obtain the lowest possible currentdraw on electrically powered lift trucks.Refer to the following diagram.

Cylinder Port ValvingCM2 directional valves are availablewith any combination of cylinder portprefill check or relief valves as shown inthe model code on page 22. The portrelief valves prevent excessive pressurein cylinder or actuator lines when thedirectional valve spool is in the neutralposition. The port also acts as ananti-cavitation and prefill check valve.

When pressure in the cylinder port isless than pressure in the return line, thecheck valve allows return oil to replenishthe system. When cylinder port pressurebecomes greater than return linepressure, the check valve preventssystem oil from escaping to tank. Reliefvalve pressure settings are availablefrom 52-240 bar (750 to 3500 psi) inincrements of 17 bar (250 psi).

Inlet Sections“R” Inlet Section – This inlet sectionincorporates Vickers partial flow bypassfeature. The bypass allows the additionof operating sections to the valvewithout a significant increase in thepressure-to-tank pressure drop. “R”sections also provide a controlled

carryover flow source for applicationwith separate auxiliary components inseries circuits from the main valve.Carryover flow is approximately 26 and95 l/min (7 and 25 USgpm) for CM11and CM2 valves respectively.

“J” Inlet Section – The operation ofthis CM11 valve section is the same asthat of the “R” inlet section except thebypass flow is approximately 34 l/min(9 USgpm). The “J” section thus allowsthe use of higher volume componentsdownstream from the valve than doesthe “R” section.

“K” Inlet Section – In CM2 valves, thisinlet section provides full flow carryoverfor use in circuits where total pumpdelivery is required for downstreamfunctions.

In the CM11 “K” section, the inlet flowshould not exceed 57 l/min (15 USgpm).

6


LiftCyl. Atmos.

TiltCyl.

“K” Section with Relief Valve

To Aux.Circuit

“K” Inlet Section Without ReliefValve (“K00”) – Relief valve and flowcontrol action is eliminated within thedirectional valve by replacing the

“K” Section without Relief Valve

hydrostat and spring with a plug.However, an external relief functionmust be provided when using valveswith this option.

LiftCyl. Atmos.

TiltCyl.

To Aux.Circuit

7


communicated back to the relief valve,thus providing the pressurecompensated, by pass flow control. Allsections downstream from a controlledflow section utilizing a fixed orifice willbe limited to the flow provided by theorifice sizing.

when a main valve spool incorporatingthe controlled flow function is operated.

A fixed or adjustable orifice, (1) in thefollowing circuit diagram, is added inthe controlled flow (tilt) section. Thelow pressure side of the orifice is

Inlet Sections for Controlled Flow toCylinder Port – This feature can beprovided in the “R”, “J” and “K” inletsections of CM11 valves to control themaximum speed of cylinder or motoroperations. The integral system reliefvalves is utilized as a flow control valve

LiftCyl. Atmos.

TiltCyl.

The “F” section in a second valve bankis dependent on the first valve bank forcarryover flow and relief valveprotection.

This section has two separate inletports (top and side). A plug within theside port separates bypass flow frommain valve spool flow.

“F” Inlet Section – This section isnormally used as the inlet section of asecond valve bank in a parallel circuit.The “F” section provides full flow forsecond-bank operation when first-bankspools are in neutral or in an operatingposition.

“F” Inlet Section for Parallel Operation

InletSeries

Connection

OutletSection “E”

Discharge To Tank

InletSection “F”

Discharge To Tank

AlternateDischarge

ConnectionMay be used in Second Bank

First Bank

Second Bank

(1)

8


line and may be ordered by using a“001” suffix following the valve designnumber in the model code.

system relief valve for closed center orconstant pressure systems. Thisfeature is denoted in the followingtypical circuit by the “X” in the bypass

Inlet Section for Closed CenterSystem – CM11 valves can beprovided with an inlet body with ablocked bypass passage and integral

LiftCyl. Atmos.

TiltCyl.

“E” Outlet Section – An “E” section isa standard “L” section with an internalpipe plug that separates the bypasspassage from the tank passage. OnCM2 valves, the plug is located withinthe side outlet port. On CM11 valves,the plug is located within the top outletport.

“E” sections are used for connectingone valve bank to a second valve bankin a parallel or series-parallel circuit.Bypass flow from the first bank is madeavailable for operating the secondbank by connecting the internallyplugged outlet of the first bank to theinlet of the second bank.

Cylinder exhaust oil from the first bankis returned to tank through the bottomoutlet of CM11 “E” sections, andthrough either the top or bottom outletof CM2 “E” sections. The unused outleton CM2 sections must be plugged.

A special non-operating outlet sectioncan be provided which allows anoperating section to be installed at theend of a multiple-spool valve bank,without disconnecting plumbing ofexisting sections. This option increasesthe valve length by 3/4 of an inch, andspecial tie bolts must be used.

The standard “L” section for CM2valves has three outlet ports; top,bottom (manifold) and side. The “L”section for CM11 valves has a top anda bottom outlet port. All valves can beprovided with removable, permanenttype plugs or plates on the outletport(s) that will not be used.

Standard “L” sections can befield-converted to “E” outlet sections.For CM2 valves, this is done byinstalling a 3/4� NPTF pipe plug (PartNo. 7078) through the side outlet port.For CM11 valves, a 3/8� NPTF pipeplug (Part No. 7076) is installedthrough the top outlet. See followingdescription of “E” outlet section.

Typical circuits utilizing this optionwould use pressure compensatedpumps or unloading valve-accumulatorsystems.

This option is also used on rock drillapplications where the hydraulic pumpis driven by an air motor. Centering thevalve causes a pressure build-up and astall condition in the air motor, thusconserving air pressure.

A closed center inlet body without arelief valve can be ordered for CM11valves by specifying a “G” inlet body inthe valve model number, in which casethe “001” suffix described above is notrequired.

Outlet Sections“L” Outlet Section – This standardoutlet section is provided as anoperating section (with spool) for multi-spool valves, or as a non-operatingsection (without spool) for single-spoolvalves.

9


outlet port in its top face for connectingreturn oil to tank. This port can be usedinstead of the bottom outlet port when

“E1” Outlet Section – This section isavailable on CM11 valves only. It is astandard “E” section with an additional

connecting valve banks in a parallel orseries-parallel circuit.

Plug SeriesConnectionInlet

TankDischarge

“E1” Alternate DischargePort Connected To Tank

Narrow Bypass Sections

CM11 valve sections are available foruse in low volume circuits ofapproximately 19 l/min (5 USgpm).Their use provides better meteringcharacteristics in low volume ranges.Slight spool movement stops or startsflow.

Spools

Various spool designs are available tomeet a broad range of applicationrequirements. Different spools can becombined in a valve bank to handle avariety of operations. All spools areplated for protection against corrosion.

“B” Spool – This spool is normally usedto direct flow to a reversible rotation,hydraulic motor. Cylinder ports remainpartially open in the neutral position toallow oil flow between motor andreservoir. The “B” spool is normallyprovided without a load-drop checkvalve but, for special cylinderapplications, it can be provided.

“T” Spool – This spool directs flow toonly one end of a cylinder, as in theexample of the lift mechanism on a lifttruck. Return flow is from the same endof the cylinder and relies on gravity ormechanical means.

“W” Spool – This spool is forapplications whereon equipment linkagerequires operation in reverse to that ofthe single-acting “T” spool.

“W3” Spool – This CM11 valve spool isnormally used in the basket of a utilitytruck.

The “W3” spool is used in a valve bankwhich requires shifting the “W3” spool inconjunction with any other spool. Thisprovides a safety interlock in that both ofthe operators hands are required tooperate the valve.

“D” Spool – This spool directs flow toeither end of a double acting cylinder.Flow from the end not under pressure isreturned to tank via internal coring of thevalve sections.

“C” Spool – This is a double actingspool with a “float” position. Float is theextreme-out spool position in CM2valves, and is an intermediate positionin CM11 valves.

This spool is held in the float andneutral positions by a detent. CM2spools are spring centered to neutralfrom the “in” or “out” position only. CM11spools are spring centered to neutralfrom the “in” position only.

Both cylinder ports of CM2 valves areopen to tank in the float position; bothports are blocked in the neutral position.Both cylinder ports of CM11 valves arealso open to tank in the float position,but in the neutral position, port “A” isopen to tank and port “B” is blocked.

“A6” Spool – This counterbalancespool is available for CM11 valves andis normally used to control the tiltfunction of a lift truck. Thecounterbalance feature is to prevent theforks from tilting forward faster than thepump can supply oil and prevent tilt.

When there is no pressure within thepressure passages, an inner spoolprevents flow from cylinder port “A” totank. When passage pressure rises toabout 14 bar (200 psi), the force exertedon the differential area of the small innerspool forces it against a spring andallows oil to flow from port “A” to tank.With this valve arrangement, port “A”would normally be connected to the rodend of the tilt cylinders. Port “B” of the“A6” spool does not restrict flow fromcylinder to tank.

10


TP

P

Spool Symbols

A B

TP

A B

T

“B” Spool “B” Spool with CheckValve (CM11 only)

P

A B

T

“T” Spool

P

A B

T

“W” Spool

A B

T

“W3” Spool(CM11 only)

P

A B

“D” Spool

TP

A B

“C” Spool(CM2 only)

TP

A B

“C” Spool(CM11 only)

“A6” Spool (CM11 only)

A B

Cylinder Ports

PressureBy-pass Tank

Spool Orientation

All sectional valves have right-handspool extensions only. In a plan view ofthe valve with the pressure inlet locatedat 9 o’clock, the extension is located at12 o’clock.

Spool Detents

Detents let the operator lock the spool inneutral or in one of the operatingpositions. Without detents, the spool willreturn to neutral when the operatorremoves his hand from the control lever.

Detents are available for all spools. Thesingle detent position on a float spool isstandard.

Detent Conversion Kit

This option provides the detent andattachment parts which may be addedto valves in the field. When a detent isinstalled on a spool, the spool must besupported on the land closest to theend, otherwise the spool could be bentfrom the force of pressing in the detent.

Optional Centering Springs

Valves are available with half-loadsprings to provide spool centering underlimited flow and pressure conditions.

Valves are available with light-loadsprings to provide a very lightspool-centering force. The spring will notcenter the spool under any conditions,thus requiring manual return to neutralby the operator.

Hydraulic ActuatorsCM2 and CM11 valves are availablewith hydraulic actuators which allowspools to be shifted by pilot pressure.Spool movement starts at 7 bar(100 psi), and the spool is fully shiftedat 14 bar (200 psi). Maximum allowablepilot pressure is 24 bar (350 psi). Theactuator may not provide requiredmetering (inching) in criticalapplications.

Shifted spools spring center at ratedvalve flow and pressure when pilotpressure is released.

For hydraulic remote controls for pilotpressure actuation, see catalogGB-MC-2032.

Manual operation of the CM2 withhydraulic end caps is also possible. Aforce of 160 pounds is required to shiftthe spool from neutral.

LiftCyl. Atmos.

TiltCyl.

(2)

With the “W” spool in neutral,discharge flow from the second pilotstage is directed to tank through thenormally plugged port of the singleacting “W” spool. Shifting the “W”spool to raise a load blocks thedischarge to tank of the second pilotstage; at this point the pilot in thehydrostat limits the pressure.

Lever Leakage AdapterFor CM11 valves, a modified handleadapter can be provided which incor-porates a tapped hole for connectionwith any rod assembly required bythe application. The adapter con-nects directly to the spool clevis.

This adapter is basically a CM11valve handle in reference to all instal-lation dimensions with the exceptionof the modified length and tappedhole.

NOTE: External line is provided by customerin two-pressure system option.

(1)

11


Electric SwitchCM2 and CM11 switch-actuatedsections are available for use in circuitswhere the pump is driven by an electricmotor. Their installation on electric lifttrucks conserves the battery yet ensuresthe availability of peak power whenrequired.

The switch, actuated by initialmovement of the valve spool, starts thehydraulic pump which instantaneouslysupplies oil to the valve. The pumpstops when the spool returns to itsneutral position.

Electric limitswitch spool

Positive detent spool

Narrow bypass spool

Electric Switch ConversionKitCM2 and CM11 units in the field may beconverted to provide a bracket and camfor mounting and actuating electricalswitches. The switch cam is press-fittedinto the end of the valve spool. A 3Madhesive, No. EC847, must be appliedto the extension to retain it in the spool.

Two-pressure SystemThis option is available with CM11valves and is ideally suited for lift truckapplications. It allows the use of lowerpressure, lower cost components andhoses for “tilt” and accessory functionswhile providing higher pressure for the“lift” function. This system alsogenerates less heat during relief valveoperation for longer pump life or,considering battery powered lift trucks,saves current for longer operationbetween charges.

As illustrated in the following diagram,the two-pressure system is provided byadding a second pilot stage (2) to aCM11’s hydrostat relief valve (1), and byusing a special “W” spool. The setting ofthe second pilot stage controls themaximum pressure of all functions in thevalve bank except the “W” spool (lift)function. The pressure setting of thepilot stage inside the hydrostat controlsthe maximum pressure of the “W” spoolfunction.

12


Lever KitsStandard lever kits are available for allsectional valves and are shown onpages 20 and 21.

Lever LinkageAdapter

.3125-18UNC-2B thd..88 deep

9,6(.38)

55,3(2.18)

40,1(1.58)

millimeters (inch)

Mixture of Port SizesThis option permits the use of differentport sizes in the same valve bank. Theuse of reducer fittings to accommodatevarious size lines can thus beeliminated.

Dust CoversCovers are standard on CM11 valvesections which do not incorporatedetents or switch brackets. Thesecovers prevent the entrance ofcontaminants into the end caps and canbe installed in the field.

Viton SealsThis option allows valves to be usedwith synthetic fluids.

SpecificationsApprox. Dry Weight – Individual Sections

SeriesNominalCapacity

l/min (USgpm)

RatedPressurebar (psi)

Inletkg (lbs)

Intermediatekg (lbs)

OperatingOutletkg (lbs)

OutletPlate

kg (lbs)

CM11CM2

113 (30)265 (70)

210 (3000) 4,1 (9)10,9 (24)

2,3 (5)6,8 (15)

3,4 (7.5)10,9 (24)

2 (4.5)4,5 (10)

Typical PerformanceFigures in performance data curves giveapproximate pressure drops (�P) whenpassing 100 SSU fluids having .865specific gravity. Pressure drop for fluidsof other viscosities is approximately:

Viscosity (SSU) 75 150 200 250 300 350 400

% of �P (Approx.) 93 111 119 126 132 137 141

For any other specific gravity, (G1),pressure drop (�P1) will beapproximately: �P1 = �P (G1)

G

13


Performance Data Curves

Flow frompress. tocyl. ports

Flow from press. to tank

Flow fromcyl. portsto tank

“K” Inlet“R” Inlet

CM2 Series

Number of Operating Sections1 - Section2 - Sections3 - Sections4 - Sections5 - Sections6 - Sections

Standard Spools B, C, D, T and WSpools in Neutral – Flow from Pressure to Tank

CM11 Series

6 spools2 spools

Pressure to Cylinder Port “A” or “B”

Flow from Cylinder Ports to Tank

Cylinder Port “B” to Tank

Cylinder Port “A” to Tank(any number of sections)

Number ofOperating Sections

1 - Section2 - Sections3 - Sections4 - Sections5 - Sections6 - Sections

(any number of sections)

160

120

80

40

00 10 20 30 40 50 60 70

11,0

8,3

5,5

2,8

0

Pre

ssur

e D

rop

– ps

i

Flow in USgpm0 10 20 30255 15

120

100

80

60

40

20

0

8,3

6,9

5,5

4,1

2,8

1,4

0

Pre

ssur

e D

rop

– ba

r

Flow in l/min

Flow in USgpm

Flow in l/min

Pre

ssur

e D

rop

– ps

i

Pre

ssur

e D

rop

– ba

r

200

150

100

50

0

Flow in USgpm10 20 30255 15

Flow in l/min

Pre

ssur

e D

rop

– ps

i

Pre

ssur

e D

rop

– ba

r

13,8

10,3

6,9

3,4

00

250

200

150

100

50

0

Pre

ssur

e D

rop

– ps

i 17,2

13,8

10,3

6,9

3,4

0

Pre

ssur

e D

rop

– ba

r

50 4321

140

120

100

80

60

40

20

0

Pre

ssur

e D

rop

– ps

i

Pre

ssur

e D

rop

– ba

r

000

000

000

00

00

00

00

0

Flow in USgpm

Flow in USgpm10 20 30255 150

Low Flow Spools B, C, D, T and WSpools in Neutral – Flow from Pressure to Tank

Flow in l/min

Flow in l/min

Flow from Cylinder Ports to Tank

38 76 114 151 189 227 265

38 76 1149519 57 38 76 1149519 57

38 76 1149519 57

19151184

14

Installation Dimensions

13,5 (.53) Dia2 holes

84,0(3.31)

28,4(1.12)

132,5(5.22)

19,0(.75)

24,6(.97)

112,0(4.41)

Ref.

36,5 (1.44)

CM2 Seriesmillimeters (inch)

Multiple Spool Valve

B B

A

B

A

A

B

A

150,8(5.94)

0,2 (.100)

37,8(1.49)

D

57,9 (2.28)

Prefill CheckOptional

Alternate Discharge ConnectionGasket Mounting or .750-14 NPT

CylinderPortReliefOptional

Location ofCarryover Porton E and *EOutlet Section.1.313-12 UNF-2BStraignt Thread

14,2(.56)

30,2 (1.19)

14,9 (.59)

69,8(2.75)

41,1(1.62)

57,1(2.25)

57,1(2.25)

61,9(2.44)

230,1 (9.06)

255,5 (10.06) 11,1 (.44)

48,5(1.91)

122,1(4.81)

5,5 (.22) R

Cylinder Connections1.313-12 UNF-2BStraight Tread (SAE Type)

Discharge Connection1.313-12 UNF-2BStraight Thread(SAE Type)

Tightening Torque45-50 lb.ft.

20,5(.81)

D

OutIn Neutral

Single Spool Valve

10,4(.41) 9,6

(.38)

0

69,8(2.75) 125,4

(4.94)135,6(5.34)

36,5(1.44)

Location ofCarryover Port onF Outlet Section.1.313-12 UNF-2BStraignt Thread

For.500 DSAEClevisPin

88,1(3.47)

82,5 (3.25)

Pressure Inlet Connection1.313-12 UNF-2BStraight Tread (SAE Type)

112,0(4.41)

134,1(5.28)

150,8(5.94)

209,5(8.25)

277,8 (10.94)

84,0(3.31)

51,8(2.04)

14,9(.59)

DischargeConnection

CylinderConnections

PressureInletConnection 13,5 (.53) Dia

2 holes

11,1 (.44)

184,1 (7.25)162,0 (6.38)

41,1 (1.62)

15


135,6 (5.34)

125,4 (4.94)

With pilotpress:Spool In(clevis end)P to Cyl. “A”Cyl. “B” totank

41,1(1.62)

57,1(2.25)

57,1(2.25)

61,9(2.44)

CM2 Series with Hydraulic Actuatorsmillimeters (inch)

Cylinder Connections DischargeConnectionTop Outlet

PressureInletConnection

11,1 (.44)

15�

Hydraulic Actuator DetailTyp. Any Section

40,3 (1.59)

255,5 (10.06)

277,8 (10.94)

124,7(4.91)

43,6(1.72)

28,4(1.12)

Pilot Port ConnectionTyp. 1.313-18 UNF-2B SAEStraight Tread for O-Ring

Alternateside outletor carryover portconnection

With pilotpress:Spool out(clevis end)P to Cyl. “B”Cyl. “A” totank

Alternatedischargeconnection

Plugged port if req’d.with T or W spool

Press. to Cyl. “B”Cyl. “A” to tank

9,6 (.38)

OutIn

Press. to Cyl. “A”Cyl. “B” to tank9,6 (.38)

Neutral

24,6 (.97)

Operating pilot pressure – 14 bar (200 psi)Maximum pilot pressure on end cap – 24 bar (350 psi)(Spool fully shifted in or out)Minimum pilot pressure (to start spool shifting) – 7 bar (100 psi)Force to manually shift spool (in/out from neutral) at rated inletflow and pressure on spool – 160 lbs.

230,1 (9.06)

SpoolClevis End

For additional dimensions see previous page

16


This switch bracket provides spacefor a .06 thick dielectric materialbetween switch and bracket

CM2 Series – Electric Switch Actuatorsmillimeters (inch)

Cylinder Port “A”

Cylinder Port “B”

57,1(2.25)

9,6 (.38) Out Position

9,6 (.38) In Position

Neutral Position

7,3 (.29)

9,6 (.38)

102,3(4.03)

104,6(4.12)

10,4(.41)

30�

60�

Micro switch BZ-2RW822 providedand mounted by customer

25,4 (1.0) 64,5 (2.54)

7,1 (.28)

3,5 (.14) 4,0 (.16)

36,5(1.44)

To convert cam to position shown inFigures 2 & 3, rotate spool 180�

Figure 1

Figure 2

Figure 3

Mtg. hole – C

For additional dimensions see page 14.

Valve Shifted FlowSwitch

V lveSection

Type

ShiftedSpool

PositionCylinderPort A

CylinderPort B

SwitchMounting

Double Out Tank Press.Fig re 1Double

Acting D In Press. TankFigure 1

Single Out TankPl gged Fig re 2ingle

Acting W In Press.Plugged Figure 2

Single OutPl gged

Press.Fig re 3ingle

Acting T InPlugged

TankFigure 3

17


61,9(2.44)

41.1(1.62)

57,1(2.25)

134,1(5.28)

150,8(5.94)

CM2 Series – Externally Adjustable System Relief Valvemillimeters (inch)

206,2(8.12)

7,1(.28)

Ref.

24,6 (.97)

28,4 (1.12)

69,8(2.75)

23,6(.93) Ref.

47,7 (1.88)

11,2 (.442)11,3 (.447)

Dia.

For .50 Dia. SAEClevis Pin

209,5(8.25)

112,0(4.41)

88,1(3.47)

48,5 (1.91)

209,5 (8.25)

203,4 (8.01)

14.9(.59)

13,5(.53) Dia.2 holes

11,3(.44)

Cylinder Connections

Discharge Connection– Top Outlet– Alternate Bottom Outlet

For additional dimensions see page 14.

6,0 (.24)Ref. – Travel ofadjustable pilotstage relief valve

18


38,1(1.50)

38,1(1.50)

52,3(2.06)

CM11 Seriesmillimeters (inch)

Single Spool Valve

Multiple Spool Valve

203,2(8.0)

129,0(5.08)

42,9(1.69)43,6(1.72)

69,8(2.75)

Single SpoolOutlet Only

22,3(.88)

9,0(.38)

Dia. 25,4(1.0) 7,8 (.31) Out

7,8(.31) In

Neutral

98,5(3.88)

12,7(.50)23,8(.94)

98,5(3.88)

Additionalpressureinlet conn.(tandeminletsectiononly)

103,1(4.06)

17,5(.69) D

For 9,6 (.38) Dia.SAE Clevis Pin

12,7(.50)

28,4 (1.12)28,1 (1.11)

2,5 (.10)2,2 (.09)

8,6(.34)11,6 (.46) Dia. – 2 holes

4,8 (.19) Float10,9 (.43) Out

Neutral4,8 (.19) In

24,6 (.97)

91,1(3.59)

64,2(2.53)

50,8(2.0)

23,8(.94)

24,6(.97)

11,9(.47)

186,1 (7.33)

61,2(2.41)

90,4(3.56)

182,6(7.19)

227,8(8.97) 158,7

(6.25)

24,6(.97)

11,0 (.437)10,8 (.427)

10,4(.41)

Discharge Connection

129,2(5.09)

10,1(.40) Dia.

65,7(2.59)

Float Spool

DetentEnd Cap

Alternatedischargeconnection –for gasketmtg. or1/2 NPTconnection

CylinderConnection

Port Connections (for SAE Straight Thread Fittings and “O” Ring Seals)

Model Code Symbol Pressure Inlet Connections Cylinder Connections Discharge Connections

1 7/8-14 UNF-2B 3/4-16 UNF-2B 7/8-14 UNF-2B

2 1-1/16-12 UNF-2B 7/8-14 UNF-2B 1-1/16-12 UNF-2B

19


5,0(.20)

158,7(6.25)

30�

Neutral

52,3(2.06)

98,5(3.88 � .03)

CM11 Series – Electric Switch Actuators

A A A

B B B

DD

25,4(1.00)

22,3(.88)

12,7(.50)

90,4(3.56)

9,6 (.38) R

7,8(.31)

In

7,8(.31)Out

Port A

Port B

55,6(2.19)

48,5(1.91)

10,4(.41)

60� 36,5(1.44)

4,0(.16)

3,5(.14)

7,1(.28)

25,4(1.00) 11,1

(.44)

Cam Position

C of Mounting Foot

Cam Position

Switch Position

Switch Position

182,6(7.19)

11,9(.47)

55,6(2.19)

48,5(1.91)

38,1 (1.50)186,1(7.33)

246,8(9.72)

10,9 (.43) +.000–.010

*PressureInletConnection

11,6 (.46) Dia.– 2 Holes

TighteningTorque180 in.lbs.

24,6(.97)

23,8(.94) 50,8

(2.00)

61,2(2.41)

64,2(2.53)

65,7(2.59)

91,1(3.59)

129,2(5.09)

8,6(.34)

17,5(.69) D.

2,5 (.100)�

0,1 (.005)

28,1 (1.11) +.005–.000

D.

Alternate DischargeConnection for GasketMounting or 1/2 N.P.T.Connection

*Refer to chart on preceding page for optional portconnections.

NOTE: Switch brackets and actuators are providedby Vickers. Customer must provide and mountmicroswitch model BZ-2RW822-** or equivalent.Space is provided for 0.06 inch di-electric materialbetween switch and bracket.

ValveSection

Type

ShiftedSpool

PositionCylinderPort A

CylinderPort N

SwitchPosition

CamPosition

Double In Tank PressureActing

“B” & “D” Out Pressure TankSingle In PressureActing Plugged

“T” Out TankSingle In TankActing Plugged

“W” Out Pressure

Flow

Switch positions for various valve sections.

NOTE: To convert from cam position tocam position rotate spool 180�.

*DischargeConnection

24,6 (.97)

10,4 (.41)

For3/8 D.S.A.EClevisPin*Cylinder

Connection

15,7(.62)

6,3(.25)

FloatOutNeutralIn

Lever shown in valvespool position “Float”

336,5(13.25)

100,0(3.94)

428,7(16.88)

319,0(12.56)

Lever shown in valvespool position “Out”

Lever shown in valvespool position “In”

20


CM11 Series – Externally Adjustable System Relief Valves

Relief ValvePressureAdjustingScrew

11,9(.47)

7,1 (.28) Ref. – Travel ofadjustable pilot stagerelief valve

For additional dimensions, refer to page 18.

26,9(1.06)

CM2 Series Control LeverHand operating lever assemblies areavailable for directional valve sections ingroups of one to ten levers.

Lever groups include necessary fulcrumrod, links and “E” washers for assembly.

Specify number of levers required inaddition to valve assembly or sectionselected as in the following example:

One (1) CM2NO2-R25DDDL-30Valve Assembly

One (1) CM2H3-30 Hand LeverAssembly

NOTE: Number after the H denotesnumber of operating sections.

OutNeutral

In

Lever shown shifted invalve spool position “Out”

Lever shown shifted outvalve spool position “In”

262,6(10.34)

147,5(5.81)

244,3(9.62)

165,1(6.50) R.

21


CM11 Series Control LeverLevers may be assembled with fulcrumin the lower holes to extend levers in theopposite direction.

Hand operating lever assemblies areavailable for directional valve sections ingroups of one to ten levers.

These lever groups include thenecessary fulcrum rod, “E” washers, andclevis pins for assembly

Specify in addition to valve assembly orsection selected and indicate thenumber of levers required as in thefollowing example:

One (1) CM11NO1-R**DBTTWCL-21Valve Assembly

One (1) CM11H6-20 Hand LeverAssembly

NOTE: Number after the H denotesnumber of operating sections.

22

Model Codes

NO = No modificationNS = Standard Sections – Electric

Switch Actuators

V05 = 500 V15 = 1500 V25 = 2500V07 = 750 V17 = 1750 V27 = 2750V10 = 1000 V20 = 2000 V30 = 3000V12 = 1250 V22 = 2250

5

4

3

2

CM2 Series

3 51 2 4 6 1087 9 11 12 13 14 15 16

1

6

12Multiple Unit Control Valve – Mobile

Series Designation

Valve Bank Modification

Port Connections2 = 1-5/16-12 UNF-2B Inlet

and Cylinders

Inlet Body TypeF = Carryover Port – No Relief ValveR = Standard – Relief Valve

(partial flow bypass)K = Standard – Relief Valve

(full flow bypass)

System Relief Valve Setting – PSI00 = No relief, K section only05 = 500 12 = 1250 20 = 2000 27 = 275007 = 750 15 = 1500 22 = 2250 30 = 300010 = 1000 17 = 1750 25 = 2500

Adjustable System Relief Valve7

Settings – PSI (Omit if not required.)Set at least 250 PSI lower than mainrelief valve

Spool Type8

B = Motor D = Double ActingC = Float T = Single ActingW = Reverse T Spool (Single Acting)

9 Spool Modification (Omit if notrequired.)1 = Detent for B, D, T or W Spools8 = Hydraulic Actuator

Outlet Body Type �L = StandardE = Carryover Port

10

Design NumberDesign numbers subject to change.Installation dimensions remain thesame for designs 30 thru 39.

11

1st SpoolA** = Check & Port Relief on End AB** = Check & Port Relief on End BPort Relief Settings – PSI07 = 750 17 = 1750 27 = 275010 = 1000 20 = 2000 30 = 300012 = 1250 22 = 2250 32 = 325015 = 1500 25 = 2500 35 = 3500

2nd SpoolA = Check only on End AB = Check only on End B

13

3rd SpoolA22 = Check & Port Relief Set at

2250 PSI on End AB = Check only on End B

14

4th SpoolN = No Check or Relief in Port A or B

15

5th Spool16

B22 = Check & Port Relief Set at2250 PSI in B Port only.Nothing in Port A.

Pre-fill Check & Port Relief Valves �

� Outlet body contains a spool in multi-spool banks. Outlet body contains no spool in a single spool valve;spool is in inlet body.

� All spools available with any combination of checks and port reliefs.

Consult your Vickers representative regarding the ordering of options not listed in this code.

23

Model Codes

NO = No modificationNS = Standard Sections – Electric

Switch ActuatorsND = Standard Sections – Dust CoversZO = Narrow Bypass Sections –

No ModificationsZS = Narrow Bypass Sections –

Electric Switch ActuatorsZD = Narrow Bypass Sections – Dust

Covers

V05 = 500 V15 = 1500 V25 = 2500V07 = 750 V17 = 1750 V27 = 2750V10 = 1000 V20 = 2000 V30 = 3000V12 = 1250 V22 = 2250

5

4

3

2

CM11 Series

3 51 2 4 6 1087 9 11

1 6Multiple Unit Control Valve – Mobile

Series Designation

Valve Bank Modification

Port Connections1 = 7/8-14 UNF-2B Inlet & Discharge;

3/4-16 UNF-2B Cylinders2 = 1-1/16-12 UNF-2B Inlet & Discharge;

7/8-14 UNV-2B Cylinders

Inlet Body TypeF = Carryover Port – No Relief ValveR = Standard – Relief Valve (7 USgpm

bypass)K = Standard – Relief Valve (15 USgpm

max. bypass)J = Standard – Relief Valve (9 USgpm

bypass)

System Relief Valve Setting – PSI00 = No relief, K section only05 = 500 12 = 1250 20 = 2000 27 = 275007 = 750 15 = 1500 22 = 2250 30 = 300010 = 1000 17 = 1750 25 = 2500

Adjustable System Relief Valve7

Settings – PSI (Omit if not required.)Set at least 250 PSI lower than mainrelief valve

Spool Type8

B = Motor D = Double ActingC = Float T = Single ActingW3 = Safety InterlockA6 = CounterbalanceW = Reverse T Spool (Single Acting)

9 Spool Modification (Omit if notrequired.)1 = Detent for any spool2 = Light Centering Spring7 = Half-load Centering Spring

Outlet Body Type *L = StandardE = Carryover PortE1 = E Section with Additional Outlet

Port

10

Design NumberDesign numbers subject to change.Installation dimensions remain thesame for designs 30 thru 39.

11

* Outlet body contains a spool in multi-spool banks. Outlet body contains no spool in a single spool valve;spool is in inlet body.

Consult your Vickers representative regarding the ordering of options not listed in this code.

RM3 & FM3 SeriesRelief Valve Pressure Override Characteristics

2500

2000

1500

1000

500

0

FM3 SeriesFlow Control Characteristics

FM3 SeriesPressure Drop – Inlet to Tank

0 38 (10) 76 (20) 114 (30) 151 (40) 189 (50)Inlet Flow – l/min (USgpm)

Rel

ief V

alve

Set

ting

– ps

i

Normal Operating Range

25

20

15

10

5

0

Reg

ulat

ed F

low

– U

Sgp

m

0

Normal Operating Range

FM3-12S-***-***-10 SeriesFM3-08P-***-***-10 SeriesFM3-14S-***-***-10 Series

Upper Operating Range(Control Sensitive –

See Pressure Drop Curve)

UnstableRange

Typical Performance Based on 60 SUS Viscosity Oil

100

50

0

Pre

ssur

e D

rop

– ps

i

0Volume of Oil Discharged from Tank Connection – l/min (USgpm)

(Inlet Flow minus Regulated Flow)

FM3-08P-***-***-10 SeriesFM3-14S-***-***-10 Series

175

140

100

70

35

0

Rel

ief V

alve

Set

ting

– ba

rR

egul

ated

Flo

w –

l/m

in95

76

57

38

19

0

Inlet Flow – l/min (USgpm)38 (10) 76 (20) 114 (30) 151 (40) 189 (50)

38 (10) 76 (20) 114 (30) 151 (40) 189 (50)

6,9

3,4

0

Pre

ssur

e D

rop

– ba

r

24

Pressure and Flow Control Valves

RM3 Overload Relief ValveThe RM3 is an internally pilot operatedvalve which provides pressureprotection to the hydraulic system.Pressure settings are preset at thefactory and are available from 35-175bar (500-2500 psi) in increments of 17bar (250 psi). Tank line pressures areadditive to relief valve settings.

Maximum operating pressure is 175 bar(2500 psi). Approximate weight is 1,1 kg(2.5 lb.).

FM3 Flow Control andRelief ValveThe FM3 is a bypass type pressurecompensated flow control and a reliefvalve. It is used in applications where aconstant actuator speed is required inthe face of varying pump output . . . forexample, in power steering.

All inlet oil in excess of the specifiedregulated flow is diverted to the tankport. Pressure protection is provided byan integral relief valve which is preset atthe factory. Available controlled flowrates and relief valve settings are shownin the model code on page 26. Tank linepressures are additive to relief valvesettings.

Maximum operating pressure is 175 bar(2500 psi). Pressure drop between theinlet and regulated flow port is about 2.8bar (40 psi). Approximate weight is 1,1kg (2.5 lb.).

25


� Port ConnectionsCode

Symbol Thread Size

08P 1/2 N.P.T.12S 3/4-16 U.N.F.-2B Str. Thread14S 7/8-14 U.N.F.-2B Str. Thread

79,2(3.12)

39,6(1.56)

RM3 Seriesmillimeters (inch)

� Tank Return Connection 51,0(2.01)

107,9(4.25)

19,8 (.78)

� InletConnection

38,1(1.50)

39,6(1.56)

19,8 (.78)

� InletConnection

38,1(1.50)

38,1(1.50)

35,0 (1.38) Dia.

24,1 (.95)

29,9(1.18)

50,8 (2.00)

35,0 (1.38) Dia.25,4 (1.00)

22,3 (.88)

35,0 (1.38) Dia.

8,6 (.34) Dia.2 Holes

9,6 (.38) R.2 Places

87,3(3.44)14,9 (.59) R.

Dimension forPipe Thd. Models

Dimension forStr. Thd. Models

� Tank Return Connection 51,0(2.01)

107,9(4.25)

14,9 (.59) R.

35,0 (1.38) Dia.

24,1 (.95)

FM3 Series

29,9(1.18)

22,3 (.88)

35,0 (1.38) Dia.

9,6 (.38) R.2 Places

50,8 (2.00)

35,0 (1.38) Dia.

8,6 (.34) Dia.2 Holes

INLE

TIN

LET

TANK

REG.

TANK

� Regulated Flow Connection

� Port ConnectionsCode

Symbol Thread Size

08P 1/2 N.P.T.12S 3/4-16 U.N.F.-2B Str. Thread14S 7/8-14 U.N.F.-2B Str. Thread

Straight thread connections are for SAEstraight thread fittings and “O” ring seals.

Straight thread connections are for SAEstraight thread fittings and “O” ring seals.

26

Model Code

75

020 = 2 gpm 130 = 13 gpm040 = 4 gpm 160 = 16 gpm060 = 6 gpm 200 = 20 gpm080 = 8 gpm 250 = 25 gpm100 = 10 gpm

4

3

2

3 51 2 4 6 87

1

6

Valve Type

Mobile Design

Series Designation

Port Connections08P = 1/2 NPT Thread12S = 3/4 SAE Str. Thread14S = 7/8 SAE Str. Thread

Controlled Flow Rates(FM3 series only)

Relief Valve Setting

Design NumberSubject to change. Installationdimensions remain the same fordesigns 10 thru 19.

F = Flow Control & ReliefR = Relief

050 = 500 psi 175 = 1750 psi075 = 750 psi 200 = 2000 psi100 = 1000 psi 225 = 2250 psi125 = 1250 psi 250 = 2500 psi150 = 1500 psi

8 Special Features Suffix

Application Guidelines

Pressure DropSelect the valve that has minimumpressure drop at the required flowcondition. Performance curves onpreceding pages show approximatepressure drops (�P) through valvesusing 100 SUS fluids having .865specific gravity. Pressure drop for fluidsof other viscosities is approximately:

Viscosity (SSU) 75 150 200 250 300 350 400

% of � from Curve 93 111 119 126 132 137 141(Approx.)

For any other specific gravity, (G1),pressure drop (�P1) will be�P1 = �P (G1).

GFor pressure drop data beyond thepublished curves in this catalog, aclose proximation can be made byreading the pressure drop at 1/2 therequired flow and multiplying it by 4.

When installing a valve, connectinglines should have as few bends andfittings as possible. High pressure linesand fittings restrict flow and may resultin excessive pressure drop through the

faster than it can be rejected, somemethod of forced fluid cooling such asair- or water-cooled heat exchangersmay be required.

PipingLines should be installed in such a waythat high vehicle flexure does notcause stresses in the tubing which canbe transmitted to valve port fittings.

When applications incorporate longhydraulic lines, or lines providing highvelocity, the use of larger capacitylines is recommended to reduce linelosses. Lines should not be smallerthat the nominal port sizes shown ininstallation drawings. Flow capacitiesof piping are shown in catalog 694.

Connections should always be tight,but not to the point of distortion, toprevent air from entering the system.Particular care must be used toemploy joints, seals and gaskets thatwill not leak or deteriorate. Seepreceding “Pressure Drop” section foradditional information on piping.

system. They should be used onlywhere necessary in a pressure line.

Select quality tubing with as large an IDas economically possible. Avoid longlines and sharp bends. A good bendradius is 21/2 to 3 times the tube ID.

The increased pressure drop in sharperbends is caused by abrupt changes inflow direction, particularly in the inneredge of flow. Even in large-radiusbends, pressure drop increases due toan increase in turbulence.

Circuit design to eliminate undesirablepressure drop can never be 100percent effective. Some energy lossesthrough heat generation must beaccepted. Therefore, whereverpossible, valves should be placed inthe open where heat can be dissipatedreadily. If heat is added to the system

27


HoseWhen installing a hose, allow enoughslack to avoid kinking. A taut hose willnot allow movement with pressuresurges. Slack in the line compensatesfor surges, relieving strain. The hoseshould not be twisted during installationor while in operation. Twisting willweaken the hose and loosenconnections.

A neater installation is usuallyobtainable by using extra fittings tominimize unusually long loops in a hose.Hoses should be secured and protectedagainst rubbing, chafing, andentanglement with moving parts.

Relief ValvesRelief valve settings specified in modelcodes are nominal “cracking pressures.”Any increase in relief valve pressuredue to flow is called the “full flowpressure.” System tank pressures arealso additive to the relief valve settings.

It is preferable to keep a 17 bar (250 psi)differential between the system reliefvalve setting and the port relief valvesetting to prevent interaction betweenthe two valves. Port relief valves withpressure settings lower than the systemrelief valve setting can be used toprotect functions incorporatingcomponents with low pressure ratings.

It is desirable to have the systemdesigned so that relief valves areinoperative during the normal workcycle. Such a system eliminates one ofthe causes of heat generation and oilaeration.

On functions incorporating a hydraulicmotor and a blocked cylinder port spool,it is preferable to provide a crossportrelief valve as close as possible to themotor to prevent motor failure.

Shifting ForcesStandard centering springs providespool centering at maximum rated flowand maximum rated pressure. Eachvalve is tested to ensure centering priorto shipping. On applications wherevalves are being used below ratedconditions, or where maximum ratedflow and maximum rated pressure arenot achieved simultaneously, lowerspring loads which provide lower shiftingforces can be provided.

Internal LeakageThe spool and body of each directionalvalve are select fitted to provide lowleakage. It is not practical to replacespools on units in the field. Onapplications where no cylinder drift isallowable when supporting a load, pilotcheck valves or similar means should beprovided.

When using directional valves inclosed-center constant pressure typesystems, consideration should be givento cylinder creep due to leakage fromthe pressure area of the valve into thecylinder ports.

FlowOn functions encountering overrunningloads, protection should be provided toprevent cavitation. Cavitation can drawair and contaminants into the circuit,reducing component life. On functionsincorporating cylinders with differentialareas, consideration should be given tothe high return flows experienced whenretracting cylinders.

MountingValves can be mounted in any position.They should be securely bolted to a flatsurface or resilient mounting pad toprevent distortion of the valve body.

Valves should be mounted in aprotected area, free from falling debris,to protect linkage and spool extensions.Enough clearance must be left toprovide access to port connections, andto permit actuation of the controlmechanism.

Operating LinkageLinkage for actuation of the valve spoolmust be properly aligned. Bindinglinkage will restrict the spool fromreturning to the neutral position whenthe control mechanism is released.

Operating linkage should rely onmaximum travel stops provided in thevalve to assure full spool travel andavoid adjustment problems.

FiltrationTo insure reliable system performance,adequate fluid filtration and protectionfrom environmental contaminantingression should be provided. Thesystem should not have a contaminationlevel greater than 18/13 as measured inaccordance with the ISO cleanlinesscode (Proposed ISO Solid ContaminantCode).

A 10-micron filter in Vickers’ OFR orOFS series, sized to accommodate fullreturn line flow, is recommended formost operating environments. If thesystem operates in a severelycontaminated atmosphere, it isrecommended that the 3 micron elementbe used because of its highercontaminant removal rate. The airbreather should also be of a similar highcontaminant removal rate. The filterelement contaminant holding capacityand change interval are importantselection criteria.

Filters should have nominal pressure,bypass check valves (see the followingfigure) to protect the system during coldstarts and whenever the filter elementbecomes clogged. Bypass filters shouldbe able to filter the equivalent of allsystem fluid within eight hours.

Out In

BypassValve

CoverElement

Vented Filler Cap

Oil Level

Return Line

Baffles

Drain Plugs (magnetic)Strainer

Suction Line

Clean-Out Cover

Pump

28


When possible, filters should be locatedin the tank return line where they trapcontaminants before the oil re-enters thereservoir (see the following figure). Thislocation also permits using alow-pressure type filter. Since return linefilter elements must be changed atregular intervals, the filter should belocated in an accessible area. For thisreason, it is best not to locate the filterinside the reservoir.

ReturnLine

Filter

ReservoirReservoir and circuit design mustprevent aeration of the fluid. Anyopaqueness or milky appearance of thefluid in the lines or reservoir indicatesexcessive aeration. Bubbles on thesurface of reservoir fluid may alsoindicate excessive aeration. It is best touse windows and sight glasses inreservoirs and inlet lines during vehicleprototype evaluation to determinewhether significant amounts of air arepresent in the fluid.

Return lines discharging into thereservoir should discharge below thelow limit oil level, as far from the pumpinlet as possible (see figure below). Thiswill prevent aeration and cavitationwhen oil is being drawn from thereservoir to fill voids in the valve. Tankreturn lines should be attached to thereservoir by flanges or weldedheavy-duty coupling.

A baffle plate in the reservoir isdesirable to separate the suction andreturn lines. The plate causes return oilto circulate around the outer wall forcooling before it re-enters the pump. Italso helps provided time for entrainedair to separate from the oil. Baffle plateopenings should be designed tominimize cascade effects and resultantair entrainment.

Magnets can be used in a reservoir topick up ferrous particles not retained byfilters or strainers. Magnets should beassembled to the support bars locatedbetween suction and return lines, andbe accessible for cleaning.

MiscellaneousFor optimum seal life, tank pressure atthe directional valve should be held to aminimum.

Systems should be designed to operateat a maximum temperature of 49�C(120�F).

Under certain conditions, the valvesdescribed in this booklet may beoperated at flows and pressures higherthan published. If standard valves do notmeet your system requirements,customized units can be madeavailable. Please contact your localVickers representative regarding specialapplication requirements.

Documents

Vickers Valves CM2, CM11, RM3 & FM3 Control Valvespub/@eaton/@hyd/... · Revised 4/96 303 CM2, CM11, RM3 & FM3 Control Valves For Mobile Equipment Vickers® Valves