HIGH PERFORMANCE GLOBE CONTROL VALVE: …€¦ · intelligent field devices for efficient field based architecture HIGH PERFORMANCE GLOBE CONTROL VALVE ... reduction in thrust requirements

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PRODUCT BULLETIN RMTC-PB-23S-001

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23 SERIES CAGE GUIDED

GLOBE CONTROL VALVES

PRODUCT BULLETIN

HIGH PERFORMANCE GLOBE CONTROL VALVE: intelligent field devices for efficient field based architecture

CUSTOMIZABLE SOLUTIONS

HEAVY DUTY DESIGN SEVERE SERVICE

LOW NOISE AND CAVITATION CONTROL WITH RMT TRIMS

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RMT CONTROLS

a division of RMT VALVOMECCANICA – GIVA GROUP

Via dei Patrioti • 21058 Solbiate Olona (VA) Italy

Ph: +39 0331 375441 • Fax: +39 0331 376847

[email protected]

www.rmtvalvomeccanica.com

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INDEX

1. GENERAL FEATURES ....................................................................................................................................................5

2. TECHNICAL DESCRIPTION .......................................................................................................................................10

2.1 BODY ...............................................................................................................................................................................11

2.2 BONNET .........................................................................................................................................................................12

3.1 TRIM COMPONENTS................................................................................................................................................13

3.1.1 PLUG ......................................................................................................................................................................13

3.1.2 CAGE DESIGN ...................................................................................................................................................15

3.1.2.1 STANDARD SINGLE STAGE CAGES .............................................................................................16

3.1.2.2 NOISE REDUCTION: NOISE CONTROL TRIMS (NCTrims 23) ..........................................16

3.1.2.3 SINGLE STAGE MULTI-PATH NOISE CONTROL CAGE (NCTrim 23ss) .......................17

3.1.2.4 MULTI STAGE-MULTI PATH NOISE CONTROL (NCTrim 23xs) .......................................17

3.1.2.5 CAVITATION CONTROL TRIM (CCTrim 23xs) .........................................................................19

3.1.2.6 EXTREME CONTROL TRIMS (NCTrim 23 PRO & CCTrim 23 PRO) ........................20

3.1.2.7 SPECIAL CONTROL TRIMS ...............................................................................................................21

3.1.3 SEAT AND PLUG SEALING SOLUTIONS ..............................................................................................23

3.1.3.1 SEAT ............................................................................................................................................................23

3.1.3.3 PLUG SEALING (balanced plug construction) ........................................................................24

3.2 PACKING .......................................................................................................................................................................26

3.2.1 STANDARD LOW EMISSION PACKING .................................................................................................26

3.2.2 LIVE LOADING LOW EMISSION PACKING ..........................................................................................26

3.2.3 BELLOW SEAL PACKING .............................................................................................................................26

3.3 ACTUATORS AND CONTROLLING DEVICES ...............................................................................................28

3.3.1 ACTUATORS ......................................................................................................................................................28

3.3.2 POSITIONERS AND PANELS ......................................................................................................................28

4. PRODUCT QUICK SPECIFICATION .......................................................................................................................29

5. 23 SERIES RATING/CONNECTION TABLES ......................................................................................................30

6. MATERIAL SELECTION GUIDE ...............................................................................................................................31

7. FLOW CHARACHTERISTICS .....................................................................................................................................33

8. DIMENSIONS AND WEIGHTS ...................................................................................................................................36

REVISION DESCRIPTION PREPARED APPROVED DATE

A FIRST ISSUE MARCO FUSCA MATTEO ROSSI 01/02/2015

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1. GENERAL FEATURES

The 23 series belongs to the RMT 20 family of straight-way globe style control valves and

is characterized by single seat cage guide and quick-change design. The 23 series covers

a wide range of applications.

You can use it in Oil & Gas as

Upstream: onshore and offshore

Midstream: transportation, filtering, reduction, metering, storage …

Downstream: petrochemical, refineries, LNG …

Distribution networks …

and also in many other industrial applications:

Chemical applications (nitrogen, hydrogen, Urea,…)

Power

Water: potable and desalination plants

…

Everywhere you need a process control

23 SERIES HAS THE AIM TO OFFER:

THE MOST SUITABLE SOLUTION FOR THE BEST PERFORMANCE:

design flexibility, with a lot of trim option, actuation and instrumentations solution

available;

the goal to suit customer request at every process condition, even the most severe ones;

HIGH RELIABILITY:

design tips and attention to materials selection to provide wear resistance and long life

even in severe conditions;

QUICK CHANGE AND COMPACT DESIGN:

design attention to reduce overall costs and offer easy handling and installation.

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THE MOST SUITABLE SOLUTION FOR THE BEST

PERFORMANCE

HIGH CAPACITY DESIGN

Large stream- flow guiding bodies allow high

capacity solutions and very flexible flow

characterization.

FULL CAGE GUIDING

Plug guide, over its full stroke, allows reducing

mechanical vibrations and flowing turbulences

induced, for enhanced reliability and dynamic

stability.

TRIM CONSTRUCTION

Trim is engineered to offer a smooth behavior for

superior process control, even under the most

severe conditions (dirty, corrosive, sticking or

slightly abrasive fluids, cavitation and noise matters,

etc).

Balanced and unbalanced construction are both

available.

Balanced design allows:

reduction in thrust requirements and actuator

sizing

high pressure drop capabilities

very accurate and efficient process control

Unbalanced design is mainly used:

with small port diameter

when tight shut-off (class VI) is requested

dirty fluid with risk of clogging

WIDE RANGE OF PACKING SOLUTIONS

In order to satisfy any special requirement in

term of low emission, different suitable

packing solutions are provided.

Low emission packing (LEM)

Live loading low emission packing (LL-LEM)

Bellow seal

Have a look to packing section.

ACTUATION AND ADVANCED DIGITAL

POSITIONING CONTROL

Pneumatic spring diaphragm (of RMT construction)

or pneumatic piston are typically used in actuation

of 23 series valves.

In addition, hydraulic or electric actuators are

available on request too.

Actuator stability is coupled with superior valve

positioning: in order to allow the best process

control, advanced valve diagnostic is available.

Smart communication hardware and software

provide real-time preventive and predictive

diagnostic data. Best brands are available and

skilled technicians at complete disposal.

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WIDE RANGE OF TRIM TYPES

Different plug and seat constructions associated

with many cage configurations allow 23 series to

meet any special requirement in term of:

High capacity trim

Reduced capacity trim

Tight shut off

Trim and constructive tips combined with suitable

material selection make 23 series suitable for:

No Erosion / corrosion applications

Low Temperature operations: CRYO service

23 series has been engineered to face up also

Noise abatement, with noise control trims

Cavitation matters, with cavitation control trims

Available trim options are widely described in next

section.

Plug can be unbalanced or balanced.

In this latter case, depending on pressure and

temperature, many different seal solutions are

available.

Energized seal ring

Graphite rings

Metal C ring

Piloted plug

Bi-tight plug

These ones can be associated with different cage

configurations:

Single stage standard cage

Single stage large window for High Capacity Cage

(HCTrim 23)

Single Stage Noise Control Trim (NCTrim 23ss)

Double Stage Noise Control Trim (NCTrim 23ds)

Three stage Noise Control Trim (NCTrim 23ts)

Single Stage Cavitation Control Trim (CCTrim 23ss)

Double Stage Cavitation Control Trim (CCTrim 23ds)

Three stage Cavitation Control Trim (CCTrim 23ts)

Disc stack (4 stages and more) for noise or

Cavitation control (NCTrim 23 Pro / CCTrim 23 Pro)

Single path multi stage trim, only for anticavitation

(CCTrim 23 Pro SP)

Variable Resistant trim (VRTrim)

Customized solutions

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HIGH RELIABILITY

In order to offer the best wear resistance and a

long working life, following key feature

characterize the 23 series control valves.

WIDE RANGE OF MATERIAL

The 23 series control valves have been developed to

cover a wide range of applications with practically

no limit in pressure and temperature.

Great attention is put into material selection,

especially in severe service applications where

erosion or corrosion problems may be present.

Sour service material class possibilities and

Exotic materials, solid tungsten carbide and ceramic

materials can be provided for trim components.

As a brand of GIVA Group, RMT is perfectly

integrated with the still mills, forges, foundries and

machining shops of the company.

RMT has the full support of an own advance metal

testing laboratory located next to the factory.

MATERIAL SELECTION

We put a great attention to material selection,

especially with reference to the trim ones.

We can guide you through the best choice at the

best cost even under the most severe conditions of

fluid temperature/pressure combination.

TRIM SELECTION

The wide variety of trim types let us to develop

a suitable design solution to manage the

effects of flashing, cavitation and noise

practically in every process condition.

SEAT TIGHTNESS

Depending on customer requests we can

guarantee seat leak class IV (standard) but we

can also achieve class V and class VI.

In some special applications, such as high

pressure steam line drain, warm-up lines, blow-

down drum lines …we can provide tight shut-off

solution with a bi-tight plug in order to avoid

premature trim wear.

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QUICK CHANGE AND COMPACT DESIGN

The 23 series control valves are

developed to offer a compact

and reliable construction.

Together with an essential valve

packing the 23 series offers a

top entry easy maintenance

design and the possibility of a

quick change trim without

dismantling the valve body from

the pipeline.

There is no need of any special

components during assembly.

All this features allow to reduce

the overall costs, especially the

maintenance ones.

23 SERIES - CCTrim 23ss

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2. TECHNICAL DESCRIPTION

1. BODY

2. BONNET

3. BODY STUD

4. BODY NUT

5. STEM

6. BODY GASKET

7. PIN

8. PLUG

9. SEAT

10. SEAT GASKET

11. CAGE

23. PACKING FLANGE

24. PACKING STUD

25. PACKING NUT

26. PACKING FOLLOWER

30. SEAL RING

55. CLAMPING RING

(for linear pneumatic diaphragm link)

58. STEM CONNECTOR

59. SCREWS CONNECTOR

71. PACKING RINGS

72. PACKING END RINGS

23 SERIES STANDARD CROSS DRAWING

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2.1 BODY

Bodies of 23 series valves have a large stream

- flow guiding design that allows both high

capacity solutions and very flexible flow

characterization with the right trim

characteristic selection.

Cast bodies are the standard of

construction, but for the smallest size,

that means up to 3’’ (DN 80), solutions by

wrought or bar steels can be provided.

Forged bodies can be taken into account

for special applications, such as bodies

with integral internal overlays.

23 series are available with all sizes from

1’’ (DN 25) up to 24’’(DN 600).

All ratings can be provided from ASME 150

up to ASME 2500.

Special constructions on request.

Mechanical design is according ASME

B16.34.

Face to face dimensions are available as

per IEC 60534 and ANSI-ISA 75.

Refer to overall weights and dimensions

paragraph.

All types of end connections can be provided

as per ASME design: refer to product

specification section.

Raised face, ring Joint, butt-welded, socket

welded and threaded types are available.

Flow direction: 23 series has a flow to open

design as a standard feature.

This standard design shall be considered

unidirectional in flow behavior. Nevertheless,

customized solutions can be engineered to

offer flow to close possibilities. Piloted plug

solutions are always associated to a flow to

close design instead, that makes possible to

realize tight shut off applications.

Materials of constructions depend on the

combination of fluid type, pressure rating and

design temperature.

Wide range of Carbon, Stainless and Cr-Mo

Steels allow covering any customer

requirement.

Exotic materials are available.

For rating tables, refer to product spec. section.

For material choice, refer to material selection guide.

23 SERIES FLANGED AND BW ESECUTION

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2.2 BONNET

Cast, forged or rolled steels are used for bonnet raw

material, depending on the valve body features: as a

standard of construction, bonnet material is the same of

body.

For material choice, refer to material selection guide.

In standard design bonnet has a bolted joint connection

with body.

23 series bonnet can be properly extended type for best

performances also in the most severe applications.

Standard plain bonnet.

For applications where the temperature of the controlled

fluid is between -30 ˚C [2O ˚F] and 600 °C [644 °F].

Although modern graphite packages are suitable for these

high temperatures, we reserve the possibility to suggest

a proper extension on the basis of specific applications

and materials used.

Extended bonnet for high, low and CRYO

temperatures up to -196°C [-321 ˚F].

The bonnet is designed with a long necked section which

distances the packing away from the process fluid.

The necked section is designed with a minimum

wall section to optimize heat transfer.

EXTENDED BONNET FOR CRYO SERVICE

STANDARD PLAIN BONNET

Extended bonnet for bellow seal application.

It’s adopted in leakproof stem seal for cases where no

gland leakage is admittable.

The design consists of welded flexible steel bellows which

are clamped in an extended bonnet. This effectively

eliminates any possible leakage path around the plug stem

thus preventing dangerous emissions from the valve

packings. In this applications packing only act as a backup

to the bellows.

EXTENDED BONNET FOR BELLOW SEAL

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3.1 TRIM COMPONENTS

Different plug and seat constructions associated with many cage configurations make 23 series perfectly suit

any application and any requirement, also the most severe ones.

23 series trim has been engineered to effectively face up and solve cavitation and noise matters, even in

presence of dirty, corrosive, sticking or slightly abrasive fluids.

3.1.1 PLUG

Plug is always heavy guided and can be customized

where necessary.

Plug materials of constructions depend on the

combination of fluid type, pressure rating and

design temperature and shall be carefully selected

together with the materials of the other trim

components.

Refer to material section guide for standard

materials of construction.

Special treatments are available such as stellite

overlay…

Balanced construction.

The balanced construction allows as a standard a flow

to open application (flow under the plug head).

Customized solutions can be adopted for flow to close

applications.

A pressure balanced design of the plug doesn’t have

any practical limitation in term of pressure drop and

allow a reduction of the thrust required at the

actuator, that means a reduction of the actuator size.

Balanced construction make also very smooth and

efficient regulation of the controlled process. This is

the reason why it can be considered the best solution

in a great variety of applications. The cylindrical plug

head is drilled with large balancing ports to lead

pressure above the plug head.

The annular leakage flow between the valve plug and

cage is avoided by a sealing ring located within a plug

groove. The standard construction allows a flow to

open application (flow under the plug).

23 SERIES - BALANCED PLUG CONSTRUCTION

FLOW

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Unbalanced.

The unbalanced construction is suitable for

bidirectional flow action (flow to open - under the

plug head- and flow over the plug).This solid design

is suitable for application with moderate pressure

drops.

It should usually considered for smaller ports ,up to

6’’ [DN 150] and/or for on/off service rather than

regulating control valves. In this latter case the

possibility to shift to 22 series should be considered.

Our technical department will evaluate the feasibility

of this option to offer you the best performances

with the easiest solution, which means the lowest

cost.

23 SERIES - UNBALANCED PLUG

Pilot operated balanced plug.

When a pilot operated balanced plug is provided the flow direction must always be over the plug, that means from

outside towards inside the cage, as indicated by the arrow in following figures.

The pilot balanced plug design incorporates two plugs. The main plug has a larger diameter and is heavy cage

guided as for all 23 Series. The smaller pilot is situated inside the main plug. Pilot act as follow.

Opening of the valve is by the pilot plug which lifts from its seat prior of the main plug.

This action produces a flow passage to equalize the pressure above and below the valve plug thus:

reducing the fluid forces acting on the valve main plug through a pressure balanced operation;

preserving the main seat from damage occurring by initial high velocities: in fact the main seat is

undiscovered when the flow rate through the pilot plug seat is no more enough.

Closing of the valve allow inlet pressure to go above the plug thus obtaining an unbalanced behavior in

closing favor: the results is an high downward seat load and the only leakage path is across metal to

metal seating.

This special design is suitable for tight shut off applications, especially in high temperature conditions where a

resilient seal would not be applicable.

23 SERIES – BALANCED PILOT PLUG – CLOSED POSITION

23 SERIES – BALANCED PILOT PLUG – OPENED POSITION

FLOW

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3.1.2 CAGE DESIGN

Cage has the following main purposes in 23 Series control valves:

The heavy guiding of the valve plug and an improvement of the dynamics of the flow.

The impingement of the jets with the valve cage produces a more stable downstream flow, thus obtaining a

smaller scale turbulence structure at the valve outlet and therefore a better dynamic stability.

Cage allow also to full guide the plug over its all stroke.

This make possible to reduce mechanical vibrations, thus obtaining an improvement in terms of reliability.

The definition of the flow characteristic curve.

Through the proper disposition and dimension of drilled holes on the cage design, it is possible to obtain

practically all the desired valve characteristic curves: linear, equal-percent, quick opening …

Anti-cavitation and noise abatement issues.

23 series have been developed with a co-axial cages design concept, in order to offer an engineered

solution to face up both cavitation and noise problems.

It is therefore possible to manufacture multistage trims suitable to face fluid cavitation and severe noise

abatement issues.

Cage materials of construction depend on the combination of fluid type, pressure rating and design temperature and

shall be carefully selected together with the materials of the other trim components

For material choice and surface treatments, refer to material selection guide.

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

Linear Exponential 30/1 Exponential 50/1

Mod.Linear Equal% Quick Open

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3.1.2.1 STANDARD SINGLE STAGE

CAGES

Cage can be engineered to meet every requirements in

terms of flow characteristic behavior.

SINGLE STAGE STANDARD CAGE: LINEAR BEHAVIOUR

SINGLE STAGE STANDARD CAGE: EQpercentage BEHAVIOUR

In applications where its required to maximize the flow

capacity of the valve, single stage large window for

High Capacity Cage (HCCage) allow to obtain the higher

possible CV values.

SINGLE STAGE HIGH CAPACITY CAGE

3.1.2.2 NOISE REDUCTION: NOISE

CONTROL TRIMS (NCTrims 23)

As a regulating device, a control valve is a noise source.

In fact pressure waves produced by flow turbulences are

responsible of the aerodynamic noise, and it’s impossible

to control the flow of a fluid without introducing

turbulences.

Mechanical vibrations are too potential noise sources, but

they can be avoided with the good design of valve and

piping.

Aerodynamic noise is generally a problem to be faced

with gases and vapors rather than liquids. Liquids noise

matters depends on another more critical phenomenon:

the cavitation.

Besides noise power is related to the stream power of

mass fluid, that depends on the square of fluid velocity.

Moreover, gas/vapors velocities are much higher than

liquids

Liquid cages are therefore engineered to avoid primarily

cavitation: this allow also a reduction of generated noise,

which can be considered a secondary matter. Refer to

CCTrims section for anti-cavitation trim description.

23 Series cages has been engineered to offers three type

of solutions to face up efficiently noise matters, on the

basis of the physical greatness involved in generated

noise.

Single stage noise control cages (NCTrim 23ss):

a multipath approach to noise problem.

Multi stage multi path noise control cages

(NCTrim 23xs):

a multistage and multipath approach to noise

problem with co-axial cage design.

Multi stage-multi path noise control trim

(NCTrim 23 PRO):

a multistage and multipath approach to noise

problem with a multiple interposed disk pack

design.

This is the finest solution to noise control as

explained in related description section.

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3.1.2.3 SINGLE STAGE MULTI-PATH

NOISE CONTROL CAGE (NCTrim 23ss)

Noise attenuation is obtained by breaking the flow into

a great number of multiple jets.

This is a multipath approach to noise reduction.

Physically a multipath trim make possible to decrease

the geometrical factor (Fd) of the valve and this permit

to shift the peak frequencies (fp) of the generated noise

to higher values not inside the human audible range

(that is 1000-8000Hz).

The higher will be noise peak frequencies respect to

piping ring frequencies (fr),the higher will be the noise

attenuation obtainable by the pipe itself (fp>fr).

Multipath approach is performed through a great

number of small diameter holes to maximize the flow

breaking into multiple jets.

Even if it could appear easy to design a single stage

cage it’s not trivial to engineer an efficient solution.

Holes diameters and disposition shall in fact be

optimized in order to respect flow jets independency,

without each other interferences: our experience and

our technical resources (R&D and CFD analysis) make

possible to offer the best noise abatement solutions

with the desired flow curve characteristic.

A noise reduction till 15 dB is possible with our

Single Stage Noise Control Trim (NCTrim 23ss)

SINGLE STAGE NOISE CONTROL CAGE (NCTrim 23ss)

3.1.2.4 MULTI STAGE-MULTI PATH

NOISE CONTROL (NCTrim 23xs)

Noise reduction can be achieved also with a different

technique: the multi-stage approach.

If the whole pressure drop is divided into multiple stages

of pressure reduction, it will be possible to change in

favor of a noise reduction the acoustic efficiency of the

valve. Small pressure drops p1/p2 make possible to

control fluid expansions and velocities keeping always

the last stage in sub-critical conditions, which is

mandatory for the noise abatement.

A single path multi stage trim will have a design very

similar to our CCTrim 23 Pro SP (refer to relative

description section 2.3.2.7): there will be a proper

coupling of multi-contoured plug and wider expansion

sections (towards the valve outlet) in order to create a

multistage labyrintic single path.

A single path multi stage approach itself would allow, if

well engineered, a considerable noise reduction.

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This design has unfortunately some practical limitation.

First at all limitation to the number of feasible stages to

use and related to seat and stroke dimensions.

Furthermore, there are limitations to the obtainable

expansion section ratios to proper control the fluid

velocities. All these deeply reduce the above-mentioned

hypothetic benefits.

Multistage approach becomes very effective when it is

coupled together with the multipath one.

This is what happens in 23 Series multi stage-multi path

noise control cages, where you can obtain the benefits of

the two techniques.

The only limitations to obtainable benefits are

represented by - the feasible number of stages due to

the allowable dimensions and by the number of

independent path that is possible to realize, in order to

keep the geometrical factor Fd the higher possible for

enhanced noise reduction.

By using the co-axial design concept of the 23 Series

cages a lot of different solutions are available in order

to satisfy the most severe requirements about noise

level control, especially where high pressure drops are

requested

Double Stage Noise Control Trim (NCTrim 23ds)

Three stage Noise Control Trim (NCTrim 23ts)

A global noise reduction till 20-25 dB is possible even

with high pressure drops.

Where four or more stage are required, disk stack

solution is preferred to co-axial cage design.

NCTtrim 23 PRO

THREE STAGE NOISE CONTROL TRIM (NCTrim 23ts)

TWO STAGE NOISE CONTROL TRIM (NCTrim 23ds)

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3.1.2.5 CAVITATION CONTROL TRIM

(CCTrim 23xs)

Cavitation is a phenomenon that characterizes liquid flow

behavior when pressure value becomes lower than the

saturation Pv point.

When cavitation occurs, the liquid begins to flash and

vapour bubbles are generated. This condition is obtained

in the so called “vena contracta”, where the pressure

reach the lowest value -and the velocity reach the peak

values- before the recovery of pressure that occurs

downstream.

Pressure recover, quantified by the parameter FL in IEC

standards, cause the bubble implosion when the valve

outlet pressure becomes again higher than the vapor

pressure.

Bubbles collapse can seriously damage solid surfaces

because of the high amount of energy released with this

phenomenon.

Cavitation highly affects both performances (vibrations,

noise, etc) and reliability: metal surfaces undergo a

inevitable pitting damage if this process is not controlled.

In order to face up this problem is necessary to control

velocity by breaking the pressure drop into a convenient

amount of smaller pressure stages.

This is shown in the following.

STANDARD CONTROL TRIM

velocity pressure vapour pressure

inlet pressure

inlet velocity outlet velocity

outlet pressure

vena contracta area

flashpoint

VALVE INLET VALVE OUTLET

MULTI STAGE CAVITATION CONTROL TRIM

velocity pressure vapour pressure

inlet pressure

inlet velocity outlet velocity

outlet pressure

vena contracta area

flashpoint

VALVE INLET VALVE OUTLET

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The adoption of a multiple stage design allow to avoid

the cavitation beginning since the pressure is kept

always, in control, higher than the flashpoint limit.

Pressure drop controlled though multiple stages allow

also to govern also velocity fields in favor of fluid

stability and noise emission.

In order to control cavitation matters, 23 series can

make use of various single or multi stage cavitation

control trims:

Single Stage Cavitation Control Trim(CCTrim 23ss)

Double Stage Cavitation Control Trim(CCTrim 23ds)

Three stage Cavitation Control Trim(CCTrim 23ts)

TWO STAGE CAVITATION CONTROL TRIM (CCTrim 23ds)

THREE STAGE CAVITATION CONTROL TRIM

(CCTrim 23ts)

3.1.2.6 EXTREME CONTROL TRIMS

(NCTrim 23 PRO & CCTrim 23 PRO)

In extremely cases when 4 stages or more are required for

noise or cavitation control, a Disk Stack Multi Stage Trim

represents the finest solution for the best control. It’s

manufactured from a brazed stack of laser cut plates, the

combination of these plates obliges the fluid to pass through a

series of 90° turns in which the flow energy is dissipated and

the DP decreasing is controlled throughout all the trim.

Disc stack (4 stages and more) for noise control

(NCTrim 23 PRO)

Making reference to what explained in noise control trims

paragraphs (2.3.2.2.3 and 4) this solution represents the

optimal one for noise abatement. It incorporated both the

multipath and the multistage approaches without the

limitations of a multi- cage design. There are no theoretical

limits related with p1/p2 ratio, stage numbers or velocity

controls This design allows a total control of the flow for the

most severe noise requirements.

Disc stack (4 stages and more) for Cavitation control

(CCTrim 23 PRO)

When the pressure drop is very high Disk Stack represents as

well the optimal solution for cavitation control, making

possible to realize4 stage and much more thus obtaining a

controlled pressure drop across the valve also in the most

severe process conditions.

DISK STACK MULTI STAGE TRIM

(NCTrim 23 PRO & CCTrim 23 PRO)

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3.1.2.7 SPECIAL CONTROL TRIMS

With dirty liquids with large particulate, in case process

condition obliges to select a multi-stage trim, a single

path multi stage trim with large passages shall be used

to avoid the risk of clogging:

Single path large passage multi stage trim

(CCTrim 23 Pro SP)

SINGLE PATH LARGE PASSAGE MULTI STAGE TRIM CCTrim 23 PRO SP

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For the most unusual requirements and to offer the most

suitable solution, our technical department can develop

variable resistant trims and other customized solutions.

Variable Resistant trim (VRTrim)

Customized trim design

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3.1.3 SEAT AND PLUG SEALING

SOLUTIONS

3.1.3.1 SEAT

The seating type depends on the required leakage class

for the valve, and it’s affected by the process conditions:

combination of fluid type, temperature and pressure are

always taken into account to offer the customer the

required performances.

Seat materials of construction depend on the above

mentioned combination and shall be carefully selected

together with the materials of the other trim components.

For material choice and special treatments (stellite

overlay,…) refer to material selection guide.

Two main type of seating solution are available.

Metal-to-metal seat

It’s the standard design. If process conditions are taken

into account during material selection of the seat, a

metal to metal seat doesn’t give any limitation in terms of

fluid type, pressure and temperature combination.

Leakage class up to class V can be achieved when

matched with a suitable plug sealing solution.

METAL TO METAL SEAT

Soft seat

Soft seat is available, where permitted by the process

conditions, to make possible achieve a leakage class up

to VI.

The design consists of a soft insert clamped between the

seat and the cage, with an additional safety O-Ring

placed on the bottom side of it.

Different insert materials can be provided to suit process

conditions: temperatures between -46°C [-50°F] up to

235°C [455 °F] are allowed.

SOFT SEAT

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3.1.3.3 PLUG SEALING (balanced plug construction)

When a balanced plug construction is provided, different plug sealing solutions are allowable in order to meet any

request in terms of leakage class.

Most typical solutions are reported in the following together with their temperature of application and leakage

performances achievable.

NB. For each sealing solution it’s very important to check the differential pressure value in relation to the working

temperatures: for max differential allowable pressures please refer to RMT Controls technical department.

PLUG SEALING

Pressure energized PTFE based seal ring

Seal type: pressure energized PTFE based ring.

Different solutions can be provided depending on working

conditions: spring loaded seal ring, with or without back

up metal ring, etc

Temperature range:-46°C [-50°F] up to 235°C [455 °F].

Leakage class: up to class IV (standard) and class V;

class VI optional is achievable with soft seat design.

PTFE SEAL RING

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PTFE based seal rings with resilient inner

Seal type: PTFE based seal ring with resilient INNER

suitable for processed fluid (Viton, HNBR ...).

Temperature range: -29°C [-20°F] up to 150°C [300°F].

Leakage class: up to class IV

PTFE SEAL RING WITH RESILIENT INNER

Metal seal ring and inner metal spring

Seal type: metal seal ring with internal metallic spring.

Different materials of constructions can be adopted:,

Nitrided CA6NM/F6NM, Inconel X-750, Ni-Resist alloys,…


Leakage class: up to class III (standard) and class IV

(possible with double seal ring design).

METAL RING WITH INNER METAL SPRING

Graphite seal ring and inner metal spring

Seal type: graphite seal ring with internal metallic spring.

Different materials of constructions can be adopted for

the inner metal.


Leakage class: class III (standard) up to class IV

C ring with “V” metallic ring

Seal type: C metallic holder with metallic sealing ring and

“V” metallic ring.

C metallic holder can be screwed to plug or fixed through

a retainer ring.

Different materials of constructions can be adopted:,

Nitrided CA6NM/F6NM, AISI 316, Inconel X-750, Ni-Resist

alloys,…


Leakage class: Up to class, V can be achieved.

C RING WITH “V” METALLIC RING

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3.2 PACKING

23 series have been developed with different suitable

packing solutions that make possible to control fugitive

emissions levels.

Due to the modulating service of a control valve packing

has been designed to allow adjustment over the service-life

of the valve.

Packing is designed to offer:

limitation in the loss of process fluid, thus

increasing efficiency;

reduction in environment contamination;

respect of the criteria of most restrictive

legislations, avoiding connected sanctions

Fire Safe design is allowable on request.

3.2.1 STANDARD LOW EMISSION PACKING

Low Emission (LEM) packing meets the criteria of ISO

15848-1: CC3 class.

It is made by a series of pre-formed braided rings PTFE or

GRAPHOIL based with two anti-extrusion terminal solid

rings.

PTFE based rings can be adopted from

-30 °C up to 200°C with a plain bonnet and from

-30°C up to 300 °C with an extended one;

max allowable pressure is 250 Barg.

GRAPHOIL based can be adopted from

-30 °C up to 600°C with a plain bonnet and from

-100°C up to 600 °C with an extended one;

there are no practical limitation in max allowable

pressure.

Furtherly it’s possible to introduce to standard design :

leak-off in order to provide the possibility of

measuring the emission level;

packing follower with a dual O-ring design

that allows very high performances with extremely

volatile gas.

3.2.2 LIVE LOADING LOW EMISSION

PACKING

Live Loading Low Emission packing (LL-LEM) can maintain

to optimal levels the leak performance practically during all

life service of the valve.

This is possible by the use of bellows springs that maintain

a constant sealing force within the packing box. The

results is constant low leakage performance with minimal

field adjustment.

3.2.3 BELLOW SEAL PACKING

Since 23 series are linear valves, they can be equipped

with Bellows Seal (BS-LEM) for low emission behavior. The

bellows seal concept isolate completely the stem from the

exterior environment, metallic bellows are welded to the

stem providing zero leak from the valve stem, in

compliance with ISO 15848-1 class A. The design includes

a leak-off detection port and a redundant packing box for

additional safety.

STANDARD LOW EMISSION PACKING (LEM): PTFE BASED

23. PACKING FLANGE 24. PACKING STUD 25. PACKING NUT 26. PACKING FOLLOWER 55. CLAMPING RING 71. PACKING RINGS (PTFE BASED - CRANE 285K)

72. PACKING END RINGS (PTFE @25% GLASS LOADED)

STANDARD LOW EMISSION PACKING (LEM): GRAPHITE BASED

27. PACKING FLANGE 28. PACKING STUD 29. PACKING NUT 30. PACKING FOLLOWER 56. CLAMPING RING 73. PACKING RINGS (GRAFOIL BASED)

74. PACKING END RING (SOLID GRAPHITE)

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OPTIONS:

- DUAL O-RING DESIGN OF PACKING FOLLOWER - LEAK OFF POINT

LIVE LOADING LOW EMISSION PACKING (LL – LEM)

BELLOW SEAL LOW EMISSION PACKING (BS-LEM)

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3.3 ACTUATORS AND CONTROLLING DEVICES

3.3.1 ACTUATORS

Pneumatic spring diaphragm or pneumatic piston actuators

are the standard of 23 series valves.

On request hydraulic or electric actuators can be provided.

3.3.2 POSITIONERS AND PANELS

Advanced digital positioner and controller are available for

enhanced performance and control.

This make possible improved process yields and real time

diagnostic features to offer real-time preventive and

predictive diagnostic data.

Both HART and Fieldbus communication protocol are

available making reference to the best positioner brands on

the market.

Dedicated positioner’s manufacturer software is provided.

Great variety of control panel configurations and wide range

of available accessories to offer you the best equipment for

your 23 Series operation:

filter regulators (standard), gauges, solenoid valves,

boosters, limit switches, ……

Our technical department is at you complete disposal and

skilled technicians are available for service and

positioners/control panels trainings.

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4.PRODUCT QUICK SPECIFICATION

23 SERIES RATING TABLE

SIZES* 1’’ up to 24’’ [DN25 up to DN600]

PRESSURE RATINGS* ASME B16.34

#150 up to #2500

[PN 20 up to PN 420]

DESIGN TEMPERATURES* -196°C up to 565°C

[-320°F up to 1049 °F]

*Standard codes of reference:

ISA 75 / IEC60534 general design code, tests and inspection

ASME B16.34 / EN 12516 strength design code

23 SERIES CONNECTION TABLE

END CONNECTIONS:

ASME B16.5 for FLANGED version*

ASME B16.11 for BW and SW version*

#150 up to #2500

VALVE SIZE

1’’ up to2’’

[DN25] up to [DN50]

3’’ up to 24’’

[DN 80 up to DN600]

RAISED FACE RF X X

RING JOINT RJ X X

BUTT WELD X X

SOCKET WELD X

THREADED ENDS X

* Standard codes of reference:

ISA 75 / IEC60534-3 end to end dimensions

MSS SP-6 surface finishing

23 SERIES PERFORMANCE TABLE

FLOW COEFFICIENT CV RANGEABILITY CV 10 to 7200

according to ISA 75 / IEC 60534-2

SEAT LEAKAGE Up to class VI

according to ANSI/FCI 70-2 and IEC 60534-4

NOISE AND CAVITATION CONTROL according to ISA 75 series and IEC 60534-8

FUGITIVE EMISSION CONTROL Up to class A

according to ISO 15848-1

OPERATING PERFORMANCES according to ANSI/ISA 75-25 and

IEC 60534-4

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5. 23 SERIES RATING/CONNECTION TABLES

ASME 150 CLASS [PN 20] ASME 300 CLASS [PN 50] ASME 600 CLASS [PN 100]

SIZE DN RF RJ THD SW BW RF RJ THD SW BW RF RJ THD SW BW

1’’ DN25 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●

1.5'' DN40 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●

2'' DN50 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●

3'' DN80 ● ● ● ● ●

● ● ●

●

4'' DN100 ● ●

● ● ●

● ● ●

●

6'' DN150 ● ●

● ● ●

● ● ●

●

8'' up to 24’’

DN200 up to

DN600 ● ●

● ● ●

● ● ●

●

ASME 900 CLASS [PN 150] ASME 1500 CLASS [PN 250] ASME 2500 CLASS [PN 420]

SIZE DN RF RJ THD SW BW RF RJ THD SW BW RF RJ THD SW BW

1’’ DN25 ● ●

● ● ●

● ● ●

●

1.5'' DN40 ● ●

● ● ●

● ● ●

●

2'' DN50 ● ●

● ● ●

●

NONSTANDARD

EXECUTION:

available on request

3'' DN80 ● ●

● ● ●

●

4'' DN100 ● ●

● ● ●

●

6'' DN150 ● ●

● ● ●

●

8'' up to 24’’

DN200 up to

DN600 ● ●

● ● ●

●

* ASME 800 CLASS [PN 130] is available with Socket Welded connection

* Standard Flange Finish is Ra between 3.2 and 6.3 micrometers [125 and 250 micro inches]

* Customized flange faces and surface finish are available on request

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6.MATERIAL SELECTION GUIDE

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As a brand of GIVA Group, RMT is perfectly integrated with the still mills, forges and foundries of the company.

RMT has the full support of an own advance metal testing laboratory located next to the factory.

Four basic steel material class are available for valve body/bonnet and trim components, which allow

covering the most common combination of fluid/pressure/temperature in globe control valve application.

PART DESCRIPTION CARBON STEEL STAINLESS STEEL

CHROME – MOLY STEEL

DUPLEX STAINLESS STEEL

-29°/+340°C 196°/+400°C -29/+560°C 100°/+320°C

1-2

BODY

BONNET

A216 WCB

A216 WCC

A352 LCB

A352 LCC

A351 CF8M

A217 WC6

A217 WC9

A217 C12

A995 4A

A995 5A

3-4

BODY-BONNET STUD

AND NUTS

A193 B7 / A194 2H

A193 B7M / A194 2HM

A193 L7 / A194 GR4

A193 L7M / A194 GR4M

A193 B8 / A194 GR8

A193 B8M / A194 GR8M

A193 B7 / A194 2H

A193 B16 / A194 GR4

A193 B16 / A194 GR16

A193 B8M/A194 GR8M

5 STEM

17-4-PH H1150D

SS316

SS316

XM19 (NITRONIC 50)

XM19

XM19

6-10 GASKET SS316L + GRAPHITE SS316L + GRAPHITE SS316L + GRAPHITE SS316L + GRAPHITE

7 PIN SS304 / SS316 SS304 / SS316 SS304 / SS316 SS304 / SS316

8 PLUG

17-4-PH H900

A182 F6NM

SS316

*1 - *2

SS316

*1 - *2

A182 F6NM

SS 316

*1 - *2

A182 F51

(S31803)

*1 - *2

9 SEAT

17-4-PH H900

A182 F6NM

SS316

*1 - *2

SS316

*1 - *2

A182 F6NM

SS316

*1 - *2

A182 F51

(S31803)

*1 - *2

11 CAGE

SS316

A182 CA6NM

*2 - *3

SS316

*2 - *3

A182 F6NM

SS316

*2 - *3

A182 F51

(S31803)

*2 - *4

23 PACKING FLANGE SS316 SS316 SS316 SS316

24-25 PACKING STUD/NUTS SS304 / SS316 SS304 / SS316 SS304 / SS316 SS304 / SS316

26 PACKING FOLLOWER SS304 / SS316 SS304 / SS316 SS304 / SS316 SS304 / SS316

30 SEAL RING REFER TO SEALING SOLUTION SECTION 3.1.3.3

71-72 PACKING RINGS REFER TO PACKING SOLUTION SECTION 3.2

*1

STELLITE GRADE 6 WHERE REQUIRED

*2

NITRIDED WHERE REQUIRED

*3

CHROME PLATED WHERE REQUIRED

*4

NICKEL PLATED WHERE REQUIRED

Combination of the above material is possible.

Sour service materials and related certifications are possible.

Exotic materials, solid tungsten carbide and ceramic materials can be provided for customized trim solutions.

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7.FLOW CHARACHTERISTICS

23 SERIES - LINEAR -

SINGLE STAGE

23 SERIES - EQUAL %

SINGLE STAGE

DN PORT Cv HCCage

DN PORT Cv

1''

3/4'' 15 -

1''

3/4'' 13

1'' 19 -

1'' 18

1 1/2''

1'' 26 -

1 1/2''

1'' 25

1 1/2'' 36 -

1 1/2'' 32

2''

1'' 31 -

2''

1'' 28

1 1/2'' 43 -

1 1/2'' 35

2'' 79 -

2'' 69

3''

1 1/2'' 45 -

3''

1 1/2'' 40

2'' 95 -

2'' 85

3'' 155 -

3'' 140

4''

2'' 110 -

4''

2'' 98

3'' 190 -

3'' 160

4'' 245 -

4'' 205

6''

3'' 210 -

6''

3'' 180

4'' 305 -

4'' 245

6'' 405 435

6'' 350

8''

4'' 320 -

8''

4'' 248

6'' 477 -

6'' 395

8'' 620 682

8'' 532

10''

6'' 490 -

10''

6'' 406

8'' 712 -

8'' 615

10'' 1057 1162

10'' 860

12''

8'' 756 -

12''

8'' 665

10'' 1090 -

10'' 938

12'' 1348 1490

12'' 1180

14''

10'' 1150 -

14''

10'' 984

12'' 1466 -

12'' 1305

14'' 1854 2040

14'' 1580

16''

12'' 1610 -

16''

12'' 1420

14'' 1990 -

14'' 1756

16'' 2580 2850

16'' 2280

18''

14'' 2050 -

18''

14'' 1756

16'' 2760 -

16'' 2392

18'' 3170 3490

18'' 2820

20''

16'' 2850 -

20''

16'' 2450

18'' 3250 -

18'' 2856

20'' 4310 4740

20'' 3810

24''

20'' 4450 -

24''

20'' 3850

22'' 6090 -

22'' 5180

24'' 6660 -

24'' 5670

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23 SERIES - LINEAR -

DOUBLE STAGE FOR LIQUID

23 SERIES – EQUAL % -

DOUBLE STAGE FOR LIQUID

DN PORT Cv

DN PORT Cv

1''

3/4'' 10

1''

3/4'' 8

1'' 17

1'' 17

1 1/2''

1'' 17

1 1/2''

1'' 17

1 1/2'' 23

1 1/2'' 21

2''

1'' 17

2''

1'' 16

1 1/2'' 23

1 1/2'' 19

2'' 43

2'' 38

3''

1 1/2'' 33

3''

1 1/2'' 29

2'' 61

2'' 54

3'' 105

3'' 95

4''

2'' 61

4''

2'' 54

3'' 105

3'' 88

4'' 154

4'' 129

6''

3'' 105

6''

3'' 90

4'' 154

4'' 124

6'' 243

6'' 210

8''

4'' 154

8''

4'' 119

6'' 243

6'' 201

8'' 317

8'' 272

10''

6'' 243

10''

6'' 201

8'' 317

8'' 274

10'' 478

10'' 389

12''

8'' 317

12''

8'' 279

10'' 478

10'' 411

12'' 571

12'' 500

14''

10'' 478

14''

10'' 409

12'' 571

12'' 509

14'' 846

14'' 721

16''

12'' 571

16''

12'' 504

14'' 846

14'' 746

16'' 1172

16'' 1036

18''

14'' 846

18''

14'' 724

16'' 1172

16'' 1016

18'' 1551

18'' 1380

20''

16'' 1172

20''

16'' 1008

18'' 1551

18'' 1363

20'' 2053

20'' 1814

24''

20'' 2053

24''

20'' 1776

22'' 2828

22'' 2406

24'' 3091

24'' 2631

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23 SERIES – LINEAR -

DOUBLE STAGE FOR GAS

23 SERIES – EQUAL % -

DOUBLE STAGE FOR GAS

DN PORT Cv DN PORT Cv

1''

3/4'' 10

1''

3/4'' 8

1'' 17 1'' 17

1 1/2''

1'' 17

1 1/2''

1'' 17

1 1/2'' 23 1 1/2'' 21

2''

1'' 17

2''

1'' 16

1 1/2'' 23 1 1/2'' 19

2'' 48 2'' 42

3''

1 1/2'' 36

3''

1 1/2'' 32

2'' 67 2'' 60

3'' 115 3'' 104

4''

2'' 67

4''

2'' 59

3'' 115 3'' 97

4'' 169 4'' 142

6''

3'' 115

6''

3'' 99

4'' 169 4'' 136

6'' 267 6'' 231

8''

4'' 169

8''

4'' 131

6'' 267 6'' 221

8'' 349 8'' 299

10''

6'' 267

10''

6'' 221

8'' 349 8'' 301

10'' 526 10'' 428

12''

8'' 349

12''

8'' 307

10'' 526 10'' 453

12'' 629 12'' 550

14''

10'' 526

14''

10'' 450

12'' 629 12'' 560

14'' 930 14'' 793

16''

12'' 629

16''

12'' 554

14'' 930 14'' 821

16'' 1289 16'' 1139

18''

14'' 930

18''

14'' 797

16'' 1289 16'' 1117

18'' 1706 18'' 1518

20''

16'' 1289

20''

16'' 1108

18'' 1706 18'' 1499

20'' 2258 20'' 1996

24''

20'' 2258

24''

20'' 1953

22'' 3111 22'' 2646

24'' 3400 24'' 2894

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8.DIMENSIONS AND WEIGHTS

(-) non standard execution: available on request

(X) customized extension, where required, are possible

23 SERIES


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RMT CONTROLS

a division of RMT VALVOMECCANICA – GIVA GROUP

Via dei Patrioti • 21058 Solbiate Olona (VA) Italy

Ph: +39 0331 375441 • Fax: +39 0331 376847

[email protected]

www.rmtvalvomeccanica.com

Documents

HIGH PERFORMANCE GLOBE CONTROL VALVE: …€¦ · intelligent field devices for efficient field based architecture HIGH PERFORMANCE GLOBE CONTROL VALVE ... reduction in thrust requirements