34-SAMSS-717

Previous Issue: 30 November 2005 Next Planned Update: 1 December 2010

Revised paragraphs are indicated in the right margin Page 1 of 19

Primary contact: Tuin, Rienk R. on 966-3-8746415

Copyright©Saudi Aramco 2009. All rights reserved.

Materials System Specification

34-SAMSS-717 10 August 2009

Hydraulic Valve Actuators Systems

Instrumentation Standards Committee Members Juaib, Mohammed Khalifah, Chairman

Tuin, Rienk, Vice Chairman

Chetia, Manoj

Dakhil, Tareq Khalil

Ell, Steven Tal

Fadley, Gary Lowell

Faer Al Sharif, Hisham Mohammed

Falkenberg, Anton Raymond

Grainger, John Francis

Harbi, Ahmed Saad

Jumah, Yousif Ahmed

Khalifa, Ali Hussain

Mahmood, Balal

Mathew, Vinod

Qaffas, Saleh Abdal Wahab

Qarni, Mahdi Ali

Sahan, Fawaz adnan

Saleem, Hesham Salem

Trembley, Robert James

Saudi Aramco DeskTop Standards

Table of Contents

1 Scope............................................................. 2 2 Conflicts and Deviations................................ 2 3 References..................................................... 2 4 General Requirements................................... 4 5 Design Requirements.................................... 6 6 Technical Requirements................................ 8 7 Testing and Inspection................................. 16 8 Documentation............................................. 17 9 Identification................................................. 18

Document Responsibility: Instrumentation 34-SAMSS-717

Issue Date: 10 August 2009

Next Planned Update: 1 December 2010 Hydraulic Valve Actuators Systems

Page 2 of 19

1 Scope

This specification together with appropriate instrument specification sheet(s) Saudi

Aramco Form SA-8020-717-ENG defines the minimum technical requirements for

hydraulic valve actuators with integral or remote power unit for rising stem and quarter

turn valves. Actuators for well head valves, offshore well platforms valves, and 4-way

prover valves are excluded (refer to API RP 14B, API RP 14C, API SPEC 14D, and

API SPEC 6A, 17th

Edition).

2 Conflicts and Deviations

2.1 Any conflicts between this specification and other applicable Saudi Aramco

Materials System Specifications (SAMSSs), Engineering Standards (SAESs),

Standard Drawings (SASDs), or industry standards, codes, and forms shall be

resolved in writing by the Company or Buyer Representative through the

Manager, Process & Control Systems Department of Saudi Aramco, Dhahran.

2.2 Direct all requests to deviate from this specification in writing to the Company or

Buyer Representative, who shall follow internal company procedure SAEP-302

“Instructions for Obtaining a Waiver of a Mandatory Saudi Aramco Engineering

Requirement” and forward such requests to the Manager, Process & Control

Systems Department of Saudi Aramco, Dhahran.

3 References

Material or equipment supplied to this specification shall comply with the latest edition

of the references listed below, unless otherwise noted.

3.1 Saudi Aramco Documents

Saudi Aramco Engineering Procedure

SAEP-302 Instructions for Obtaining a Waiver of a

Mandatory Saudi Aramco Engineering

Requirement

Saudi Aramco Materials System Specifications

17-SAMSS-503 Severe Duty Totally Enclosed Squirrel Cage

Induction Motors to 250 HP

21-SAMSS-010 Fireproofing for Valve Actuators Box and Blanket

System Enclosures

26-SAMSS-051 Hydraulic Oil AW 68

34-SAMSS-821 Instrument Control Panel-Outdoor

http://standards/docs/Forms_Data_Sheets/XLS/SA-8020-717.XLS

http://standards/docs/Saep/PDF/SAEP-302.PDF

http://standards/docs/Saep/PDF/SAEP-302.PDF

http://standards/docs/Samss/PDF/17-SAMSS-503.PDF







Page 3 of 19

34-SAMSS-831 Instrumentation for Packaged Units

Saudi Aramco Inspection Requirement

Form 175-341001 Hydraulic Valve Actuators

Saudi Aramco Engineering Data Sheets

SA-0375-ENG Valve Data for Mounting Motor Operators

SA-8020-717-ENG Instrument Specification Sheet Hydraulic Valve

Actuators

SA-8020-825-ENG Instrument Specification Sheet Electro Mechanical

Relays

SA-NMR-7930 Nonmaterial Requirements for Hydraulic Valve

Actuators

3.2 Industry Codes and Standards

American National Standards Institute

ANSI B1.20.1 Pipe Threads General Purpose (Inch)

ANSI C84.1 Electrical Power Systems and Equipment -

Voltage Ratings (60 Hertz)

American Society of Mechanical Engineers/Boiler & Pressure Vessel Code

ASME SEC VIII D1 Pressure Vessels

ASME B16.5 Pipe Flanges and Flanged Fittings

American Society for Testing and Materials

ASTM A269 Seamless and Welded Austenitic Stainless Steel

Tubing for General Service

International Electrotechnical Commission

IEC 60529 Classification of Degrees of Protection Provided

by Enclosures

IEC 34.1 Rotating Electrical Machines, Part 1 - Rating and

Performance

National Association of Corrosion Engineers / International Standardization

Organization

NACE MR0175/ISO 15156 Petroleum and Natural Gas Industries-

Materials for use in H2S-Containing

Environments in Oil and Gas Production


http://standards/docs/Inspection_Requirements/PDF/175-341001.pdf

http://standards/docs/Forms_Data_Sheets/XLS/SA-0375.XLS



http://standards/docs/Nonmaterial_Requirements/PDF/SA-7930.pdf

http://linkmanager.ihs.com/LinkManagerService/LKMLink.aspx?LinkRefName=NACE+MR0175%2fISO+15156&RefGroupId=30





Page 4 of 19

National Electrical Manufacturers Association

NEMA MG 1 Standard Publication Motors and Generators

NEMA 250 Enclosures for Electrical Equipment

(1000 Volts Maximum)

NEMA ICS 6 Enclosures for Industrial Controls and Systems

National Fire Protection Association

NFPA 70 National Electrical Code

4 General Requirements

4.1 Engineering Units

All dimensions and measurements shall be in the "International System of

Units" (SI) followed by the equivalent value in English (conventional) units

between brackets. When not critical, the equivalent dimensions may be rounded

off to their nearest practical value.

4.2 Equivalent Materials

Specification of or reference to materials by brand names or proprietary names

is not intended to exclude equivalent materials that may be offered by other

suppliers. Items of comparable type, quality, and performance characteristics

may be proposed.

4.3 Vendor Responsibility

Vendor compliance with the provisions of this SAMSS does not relieve Vendor

from the responsibility to furnish equipment of proper design to meet the

specified environmental, electrical, application, service, and operating

conditions.

When the actuator is ordered with its related valve, the valve manufacturer shall

be responsible for the complete actuator-valve combination (reference testing

requirements for valve/actuator assembly in Section 7.2.3).

4.4 Environmental Conditions

Actuators and associated control components shall operate continuously under

the following ambient temperature, humidity, and air quality conditions without

any degradation of the manufacturer's guaranteed performance.




Page 5 of 19

4.4.1 Humidity and Temperature Conditions

Relative Humidity: Minimum 5%

Maximum 95% (non-condensing)

Temperature: Minimum 0°C

Maximum See Table Below

Direct Solar Radiation

Sheltered (¹) 55°C (131°F) (²)

Exposed 65°C (149°F) (²)

Notes:

(1) "Sheltered" refers to permanent, ventilated enclosures or buildings, or permanently fixed sun shades with a top and three sides.

(2) If an internal heat source is present, the Vendor shall guarantee the equipment for a maximum design temperature equal to the above ambient temperature, plus the predicted temperature rise.

4.4.2 Offshore and Nearshore Environment

Equipment which is not enclosed or hermetically sealed, but is situated

offshore or nearshore, shall be protected against corrosion and

operational failure due to wind-borne sea water spray and the

accumulation of wetted salt (NaCl). Nearshore is defined as any

outdoor, onshore location within one kilometer from the shoreline of the

Arabian Gulf; all of the Ras Tanura Refinery and Terminal; and within

three kilometers from the shoreline of the Red Sea.

4.4.3 Ambient Air Quality

Commentary Note:

Air-borne dust concentrations and contaminant levels are used in mechanical equipment design, when sizing air filters and as a measure of potential dust ingress in bearing housings, lube oil systems, etc.

Dust Concentration: Usual airborne dust concentration is 1 mg/m³.

During sandstorms, dust concentrations may reach 500 mg/m³. Particle

sizes are as follows:

95% of all particles are less than 20 micrometers

50% of all particles are less than 1.5 micrometers

Elements present in dust include compounds of calcium, silicon,

magnesium, aluminum, potassium, chlorides and sodium. When wetted

(high humidity conditions), these compounds function as electrolytes and

can result in severe corrosion.




Page 6 of 19

Other pollutants present in the atmosphere under the most extreme

conditions are:

H2S 20 ppm (vol/vol)

Hydrocarbon 150 ppm (vol/vol)

SO2 10 ppm (vol/vol)

CO 100 ppm (vol/vol)

NOx 5 ppm (vol/vol)

O3 1 ppm (vol/vol)

5 Design Requirements

5.1 Basic Actuator Requirements

The hydraulic actuator type shall be as specified under Actuator Data on Saudi

Aramco Form SA-8020-717-ENG. The hydraulic actuator and power unit

assembly shall consist of components required on the specification sheet. Each

component shall meet the applicable technical requirements listed in Section 6.

The hydraulic power system shall be comprised of motors, pumps, reservoirs,

accumulators, strainers, controls and all other necessary equipment to provide an

intermittent supply of hydraulic liquid at the maintained pressure for the

operation of the valve/valves.

5.2 Operating Mode

The operating mode shall be as specified on Saudi Aramco Form

SA-8020-717-ENG under Design Data.

5.3 Stroking Speed

The required stroking speed shall be specified to meet plant operational

requirements and process dynamics. Careful attention shall be given to the

specification of closing speed for pipeline applications, to avoid potential surge

and/or water hammer effects resulting from rapid valve closure.

The valve operator shall be capable of opening and closing the valve within the

times specified on Saudi Aramco Form SA-8020-717-ENG given the worst case

service requirements (the maximum differential pressure across the valve equal

to the maximum line pressure specified on Saudi Aramco Form

SA-8020-717-ENG).








Page 7 of 19

Commentary Note:

Typical stroking speed limits are:

For rising stem valve: 4-5 mm/s

For ¼-turn valves: 4-5 seconds per inch of valve nominal size for 90 degree rotation

5.4 Failsafe Design

Components and circuits shall be chosen so that the valve will be driven to the

fail safe position in the event of power supply, control power supply and/or

components failure. The fail safe position (open, closed, or fail-steady) shall be

specified on Saudi Aramco Form SA-8020-717-ENG.

5.5 Sizing

The maximum process pressure, differential pressure, and shutoff differential

pressure, as specified on Saudi Aramco Form SA-8020-717-ENG, shall be used

as the basis for actuator sizing.

The torque/thrust available from the actuator at any point in the stroke shall be at

least 1.3 times the required torque/thrust output over the range of operating

pressures specified. Minimum gas/hydraulic supply pressure should be assumed

for these torque/thrust figures.

Commentary Note:

Caution must be used when selecting/sizing an actuator for an existing valve. Checks must be made to ensure that the selected actuator will not be hazardous to the valve top works and stem.

5.6 Mechanical Requirements

a) All threaded pipe connections shall comply with ANSI B1.20.1.

b) All flanged pipe connections shall comply with ASME B16.5.

c) Aluminum used for instrument enclosures shall contain not more than

0.5% copper.

d) All pressure containing tanks (15 psig and above) supplied with the

operator shall be designed, fabricated, and stamped in accordance with the

requirements of ASME SEC VIII D1.

e) All pressure retaining components used shall be capable of withstanding

pressures of 1.5 times the maximum working pressure applicable.

f) Materials of construction, including all bolt-on components and

accessories, shall be suitable for long term exposure to the environment.






Page 8 of 19

g) All parts contacting the process in sour service shall conform to

NACE MR0175/ISO 15156.

5.8 Electrical Requirements

5.8.1 Certification

Electrical components or devices which are intended for operation in

locations classified as hazardous shall comply with the requirements of

NFPA 70, National Electrical Code, Article 500, and shall be third party

certified (labeled) as suitable for the intended area (UL, FM, or other

approved agency).

Enclosures not required to be explosion proof, shall be specified as

NEMA 4X (built to NEMA 250 and NEMA ICS 6) or IEC 60529 IP 66.

All enclosures shall bear labels from a third party testing laboratory (i.e.,

UL, CSA, BASEEFA, KEMA, etc.) indicating that they are designed,

constructed and tested to the applicable standards referenced within this

specification.

5.8.2 Voltage and Frequency Variations

Vendor supplied electrical equipment shall be suitable for operation

within the allowable voltage range variations specified in ANSI C84.1,

Table 1.

5.8.3 Color Coding

AC power source wiring shall be as follows:

Live (Hot) Black

Neutral White or Natural Gray

Ground Green or Green with Yellow Strip

DC power source wiring shall be as follows:

Positive Red or Red sleeve over any color except green

Negative Black or Black sleeve over any color except green

6 Technical Requirements

6.1 Basic Hydraulic Actuator System

The system shall be suitable for power and manual operation. The actuator

system shall consist of the following main items.






Page 9 of 19

All parts necessary to adapt an actuator to a specified valve shall be provided by

actuator vendor.

6.1.1 Hydraulic Actuator

Actuator Type: as specified on Saudi Aramco Form SA-8020-717-ENG.

6.1.1.1 Application Requirements

The minimum torque/thrust output of the valve actuator shall

meet the sizing requirements in Section 5.5. In addition, valves

shall be designed to bear the maximum torque that the actuator

can develop with maximum specified hydraulic supply

pressure.

6.1.1.2 Mechanical Requirements

a) Actuator cylinder shall be of seamless carbon steel unless

otherwise specified.

b) Vent and drain connections shall be provided at physical

high and low points.

c) Manual operation shall be provided by means of a

hydraulic handpump assembly. The hydraulic hand pump

shall be supplied such that the valve can be operated

manually at the full differential pipeline pressure.

d) The hydraulic hand pump shall be equipped with an

open/close/off control lever. Setting the control lever to

open or close shall enable the hand pump to be operated.

e) The open (close) control lever shall provide positive

indication (locally) that the hand pump is in the manual

mode. Alternately, it shall be designed such that if the

lever is left in the open (or close) position, it shall reset to

the normal control position automatically when the local

manual control is disengaged, or remote automatic control

is initiated.

f) The hand pump control system shall not allow potentially

dangerous sudden movement of the hand pump lever

when local manual control or remote automatic control is

initiated.

g) Valve shaft side loads developed within quarter turn valve

actuators shall be absorbed by the casing of the actuator.

h) Exposed torque arms are not allowed.





Page 10 of 19

6.1.1.3 Accessories

Rising Stem Valve Actuators

a) A mechanical lock shall be provided in the gate in full up

position to assure that the valve will remain in the

extreme position upon loss of hydraulic fluid during

maintenance periods.

Commentary Note:

A mechanical lock that bypasses the fail safe design of ZV's shall be capable of being car-sealed or locked in the safe (ESD enabled) position.

b) A mechanical true valve position indicator shall be

provided connected to the valve stem and visible from at

least 10 m.

c) A dust tight valve stem protector shall be provided.

d) Provisions to absorb thrust or torque in excess of that

required to operate the valve shall be provided through

one of the following accessories:

1) Adjustable piston rod to valve stem coupling. The

piston to end of cylinder stop limits the travel.

2) Mechanical stops within the actuator. The

mechanical stops shall be positive and externally

adjustable.

Quarter Turn Valve Actuators

a) A top-removable true valve position indicator flag of

stainless steel visible from 10 m shall be provided.

b) Mechanical rotation stops shall be provided and shall be

positive, externally adjustable plus or minus 5 degrees at

each end of the valve stroke. Rotation may be 60 or 90

degrees as specified on the I.S.S.

6.1.2 Position Limit Switches

The actuator shall be fitted with a minimum of two limit switches for

valve position indication, one at each of the fully open and fully closed

positions. The switches shall be such that they are closed when the valve

is in the appropriate fully open or fully closed position as specified on

the I.S.S. Each switch shall operate within 3% of the valve travel from

the respective open and closed limits. The switches shall be:

a) Hermetically Sealed




Page 11 of 19

b) Adjustable at each end of travel

c) Provided as durable complete assemblies

6.1.2.1 Additional Position Limit Switches

Additional travel limit switches for remote electrical control

and indication or when dual speed operation is required shall

be provided as specified on the I.S.S.

6.1.2.2 Additional Potentiometer

When specified an additional potentiometer shall provide

remote indication of the valve position and shall be rated at a

minimum of 3 watts for continuous operation on the maximum

specified voltage against the particular resistance value as


6.2 Hydraulic Power Unit Assembly

The assembly shall consist either of electric motor or pneumatically driven

hydraulic pumps, process/nitrogen gas driving gas/hydraulic tanks, or nitrogen

gas cylinders driving accumulators (as specified on Saudi Aramco Form

SA-8020-717-ENG). When supplied as a separate packaged assembly, the

hydraulic power unit shall meet all requirements of 34-SAMSS-831, Package

Unit Instrumentation.

6.2.1 Electric Motor Driven Power Unit

6.2.1.1 Electric Motors shall meet the requirements specified in

17-SAMSS-503.

6.2.1.2 Hydraulic Pumps

Pumps shall be positive displacement type per Manufacturers

standard.

6.2.2 Accumulators

6.2.2.1 General

a) Accumulator bank total volume shall be sized for three

(3) valve strokes under maximum operating conditions in

the event of failure of the hydraulic pump drive power.

A valve stroke is movement of the valve from the open

to close position or from the close to open position. In

multiple valve applications, the accumulator bank total








Page 12 of 19

volume shall be sized based on the valve with the largest

potential supply requirement.

When in ESD service, only one valve shall be connected

to an accumulator bank sized as described above.

b) Accumulators shall be piston or bladder type mounted

vertically with the relief valve on top.

c) Each accumulator shall have independent block and

bleed valves for the hydraulic fluid.

d) A minimum of two (2) accumulators shall be provided

for each hydraulic power console.

6.2.3 Gas/Hydraulic Tanks

6.2.3.1 General

The gas over hydraulic valve actuator systems shall be capable

of holding the valve in any position and shall be designed to

accept line pressure for power gas. Regulators may be used to

supply low pressure gas for pneumatic control circuits when


6.2.3.2 Tanks

Gas/hydraulic tanks shall be designed to prevent gas from

reaching the power cylinders.

6.2.3.3 Power Gas Storage

When specified on Saudi Aramco Form SA-8020-717-ENG, a

power gas storage bottle with an isolating valve and a check

valve on the supply line shall be incorporated in the power gas

circuit to provide sufficient reserve for one valve closure at the

minimum operating pressure with enough reserve capacity for

one additional closure (3 strokes).

6.2.3.4 Power Gas Venting

The main power gas isolation valve will be provided by the

purchaser. However, manual isolation valves at the actuator

for the power gas supply with vent or bleed valves shall be

supplied to allow all sections of the actuator assembly to de-

pressurized.






Page 13 of 19

At the end of the valve travel, the power gas within the

gas/hydraulic tanks shall be vented to atmosphere. Power gas

vent shall be supplied and installed to allow the release of the

vented gas at the top of the operator. It shall be possible to

extend the vent piping without major modification to a safe

height above the valve operation platform. Provision shall be

made to prevent weather elements from entering the vent

piping, a bleed valve with plug shall also be installed allowing

any fluids to be drained.

6.2.4 Nitrogen Supply Systems

When nitrogen supply is specified for gas/oil or accumulator based

operators:

a) All tubing connections on the hydraulic side shall be double ferrule

type.

b) Relief valve with leaktight soft seat for nitrogen tank shall be

provided.

c) Nitrogen charge valve shall be refrigeration type with sealing cap

provided with an elastomer seal.

d) All connections on the nitrogen side shall be seal welded or

mechanically sealed with an elastomeric element.

e) A bubble tight manual shutoff valve shall be supplied to isolate the

power source from the accumulator.

f) A low pressure switch with SPDT contacts shall be supplied as an

integral part of the power source. It will function as an alarm for

remote indication of availability of nitrogen power.

6.2.5 Console

Hydraulic tubing and fittings shall be to ASTM A269, Type 316L. The

maximum distance between actuator and control console shall be 60 m.

All non-metallic components, including O-rings and seals, shall be

designed for use over the temperature range specified and shall be able to

withstand exposure to the specified process gas.

Electrical conduit and wire, pipe for protection of tubing, air supply

materials, and concrete pad will be provided by Buyer.




Page 14 of 19

6.3 Control System

6.3.1 Electric Control System

The motor control enclosure shall be factory sealed and as a minimum be

furnished with the following. Reference 34-SAMSS-821, Instrument

Control Panel-Outdoor, for additional electrical requirements.

a) Breather and drain, if not of a totally o-ring or gasket sealed

construction.

b) Mechanically and electrically interlocked contactor(s) containing

three auxiliary contacts (two normally open and one normally

closed).

c) Relays as required which shall then be in compliance with

completed Saudi Aramco Form(s) SA-8020-825-ENG.

d) Integral Selector Switch with three positions marked: 'LOCAL',

'OFF' and 'REMOTE'. The switch shall allow padlocking in any

position. The Buyer will provide a padlock.

e) Integral push buttons for selection of 'CLOSE', 'OPEN' or 'STOP'

functions and labeled accordingly, to allow the actuator to stroke

the valve fully or to stop at any position.

f) Local pilot lights, indicating the valve position as follows:

- OPEN : GREEN

- CLOSED : RED

- INTERMEDIATE : RED and GREEN simultaneously, or

WHITE

g) Screw or stud type terminals for all external connections. Brittle

materials such as melamine shall not be used. Power and control

terminals shall be separately grouped and separated by dividers.

h) Provisions on the terminal strip for parallel installation of

additional indicating lights remote from actuator housing.

i) A minimum of three (3) conduit entries provided with taper threads

in accordance with ANSI B1.20.1. Sizes shall be at least one (1)

inch NPT.

An external lug to accommodate a grounding conductor of 10 mm².

All conduit connections shall be made so as to assure grounding

continuity.






Page 15 of 19

Solenoid operated valves (SOV's) shall have class H insulation and

Viton soft goods.

Exception:

When low power (1.8 Watt) coils are specified, Class F insulation is acceptable.

6.3.2 Hydraulic Control System

The hydraulic control system shall at least incorporate the necessary

components for the mode of operation as specified on Saudi Aramco

Form SA-8020-717-ENG.

Where necessary in order to avoid pipeline surge, speed control

assemblies shall be included in the discharge of fluid from the actuator.

These shall be arranged such that the risk of causing blockage of the

flow of fluid from the actuator shall be minimized.

6.3.3 Emergency Shut Down Service

Emergency Isolation Valve (EIV) actuators within fire hazardous zones

shall be fireproofed per 21-SAMSS-010. Hydraulic actuators specified

for Emergency Isolation Valve service (ZV's) shall provide "fail safe"

action as specified on Saudi Aramco Form SA-8020-717-ENG.

6.3.4 Modulating Service

The following shall be provided:

a) A manual selector switch to open or close the valve directly.

b) Preset valve position switch to enable the selection of any valve

position. (Only if specified).

c) Positioners with control characteristics selection option (means for

linear, equal percentage and modified characteristics). The

positioners shall have external span and zero adjustment.

6.3.5 Hydraulic Oil Reservoir

The requirements listed below apply to hydraulic oil reservoirs/tanks in

low pressure applications (less than 15 psig). Hydraulic oil

reservoirs/tanks in service with 15 psig or higher pressure, shall be

designed, fabricated, and stamped in accordance with the requirements

of ASME SEC VIII D1. For all tanks other than atmospheric, cylindrical

construction is preferred.







Page 16 of 19

6.3.5.1 The reservoir shall be stainless steel.

6.3.5.2 The reservoir of an actuator without accumulator shall be sized

to be not less than 10% full of oil with the system charged and

not more than 90% full of oil with the system discharged.

6.3.5.3 The reservoir of an actuator with accumulator shall be sized to

be approximately half full of oil with accumulators charged

and not more than 90% full of oil with accumulators

discharged.

6.3.5.4 Accessories (when specified on Saudi Aramco Form

SA-8020-717-ENG.)

a) Sight glass type level gauge with marks on the reservoir

when the system or all accumulators are charged,

calibrated in open and closed position of the valve.

b) Relief valve.

c) Drain line with valve.

d) Oil outlet strainer, 100 micrometer, large surface area

type, stainless steel.

e) Low level switch.

f) Fill cap attached to the reservoir by means of a chain,

with pressure release valve and non-overfill standpipe.

g) Micro-coalescent filter, regulator and pressure gauge, as

applicable.

h) Return line check valve.

6.3.6 Hydraulic Oil

The hydraulic oil shall meet 26-SAMSS-051.

7 Testing and Inspection

Items manufactured to this specification are subject to the minimum inspection

requirements as specified in Form 175-341001.

7.1 Hydrostatic/Pneumatic Test

The overall actuator assembly, including the actuator, accumulators, consoles,

controls, and tubing, shall be leak tested for 5 minutes duration at a pressure

50% above the maximum operating pressure.







Page 17 of 19

7.2 Functional and Performance Test

7.2.1 Actuator shall be tested for actuator stem travel or shaft rotation, stroking

speed, fail safe operation, and overall actuator assembly respectively,

against the requirements of the equipment specification.

7.2.2 Tests shall be made at load and no load and shall ensure that all devices

operate as intended, such as pressure switches, limit switches, pressure

relief valves, speed control valves, hand operation, and automatic

override of hand operation (when specified).

Actuator testing should be conducted with the valve as a unit. If not

possible, tests shall be performed on a valve-actuator mounting identical

to the valve referred to on Saudi Aramco Form SA-8020-717-ENG. If

that type of valve cannot be made available at the Vendor's shop, a

similar type of valve may be proposed or as an alternative a simulated

torque may be applied.

Once hydrostatic and functional testing is completed, the actuator/control

assembly shall be prepared for shipment based on shipping instructions

supplied by the actuator supplier.

Commentary Note:

Special shipping procedures are required for linear actuators equipped with gas hydraulic tanks to prevent the loss of hydraulic fluid when shipped in a horizontal position.

7.3 Nonmaterial Requirements

The supplier shall provide nonmaterial items as shown on Form SA-NMR-7930.

8 Documentation

All documentation shall be in the English language.

8.1 Purchase Order Information to be specified by Buyer

Refer Saudi Aramco Form SA-8020-717-ENG attached to the Purchase Order.

For each actuator that is to be applied to an existing valve, Buyer will provide

purchase order and serial number of existing valve; and Saudi Aramco Form

SA-0375-ENG, Valve Data for Mounting Motor Operators, showing the

dimensions of the stem and the yoke flange.


http://standards/docs/Nonmaterial_Requirements/PDF/SA-7930.pdf


http://standards/docs/Forms_Data_Sheets/XLS/SA-0375.XLS




Page 18 of 19

8.2 Vendor Documentation

Vendor documentation shall be in accordance with Non-Material Requirements

attached to the Purchase Order. The documentation shall include:

8.3 Specific Information for Hydraulic Actuators

8.3.1 Nitrogen or gas consumption, both maximum value under idling or

steady state conditions and peak value during stroking at worst process

operating conditions.

8.3.2 Minimum operating pressure and maximum allowable pressure of the

nitrogen supply required for the power unit only.

Total electrical consumption and input resistance of control signal

receiving elements (electro-hydraulic transducer or electro-hydraulic

positioner).

8.3.3 A Material Safety Data Sheet (MSDS) for the hydraulic oil shall be

provided as part of the documentation supplied with the actuator.

8.4 Certificates

Certificates in accordance with Form 175-341001, Inspection Requirements,

attached to the Purchase Order.

9 Identification

9.1 Actuator Nameplate

Stainless steel nameplates shall be securely attached to the actuator with similar

stainless steel fasteners. This tag shall be marked by raised or die stamped

lettering and shall be located so that the information can be seen after the

equipment is installed. This tag shall include the following information:

- Actuator and/or valve-tag number, if different from actuator.

- Manufacturer, model number and serial number and P.O. numbers.

- Rated hydraulic supply pressure.

- Rated thrust or torque.

- Fail safe position (Open, Closed, or Fail-Steady).

- Nitrogen supply/electrical supply (accessories).

- Electrical enclosure certification.





Page 19 of 19

9.2 Motor Nameplate

The motor nameplate shall be in accordance with NEMA MG 1 or IEC 34.1. In

addition, the rated torque shall be stated.

9.3 Accessories

When accessories are supplied not mounted to the actuator, they shall have a

permanently attached stainless steel nameplate showing the actuator tag number

to which they belong, as well as hydraulic, nitrogen or electrical signal

(input/output) and supply figures.

Revision Summary 30 November 2005 Revised the "Next Planned Update". Reaffirmed the contents of the document, and

reissued with editorial changes. 10 August 2009 Editorial revision to replace cancelled SAES-A-301 with NACE MR0175/ISO 15156.

