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PDVSA N TITLE
REV. DATE DESCRIPTION PAG. REV. APPD. APPD.
APPD.BY DATEDATE
VOLUME 9I
1994
K332 CONTROL VALVES
FOR APPROVAL
Eliecer Jimnez Alejandro NewskiAUG.94 AUG.94
ENGINEERING SPECIFICATION
AUG.94 L.T.0 8 E.J. A.N.
ENGINEERING DESIGN MANUAL
ESPECIALISTAS
APPD.BY
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REVISION DATE
ENGINEERING SPECIFICATION
CONTROL VALVES
Page 1
AUG.940
PDVSA K332
Men Principal Indice manual Indice volumen Indice norma
Index
Page
1 SCOPE 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 CODES, STANDARDS AND PRACTICES 3. . . . . . . . . . . . . . . . . . . .
3 DEFINITIONS 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 DESIGN REQUIREMENTS 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1 General 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2 Control Valve Body 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3 Valve Trim 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.4 Packing 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5 Actuators 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.6 Positioners 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.7 Electro Pneumatic Convertors 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.8 Handwheels 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.9 Solenoid Valves 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.10 Limit Switches and Valve Position Transmitters 7. . . . . . . . . . . . . . . . . . . . . . 4.11 Volume Boosters 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.12 Air Lock Valves 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.13 Self Acting Regulating Valves 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 SPECIFICATION FORMS 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 INSTALLATION AND COMMISSIONING 8. . . . . . . . . . . . . . . . . . . . . .
7 Q.A. / Q.C. 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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CONTROL VALVES
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FOREWORD
This document is the result of several years work by engineers in the petroleum industryof Venezuela (PDVSA).
The recommendations presented in this publication are not intended to supersedeapplicable laws and regulations.
Users of this recommended practice are reminded that no publication of this type can becomplete, nor, can any written document, be substituted for qualifed engineering analysis.
Suggested revisions are invited and should be submitted to:
The manager
PDVSA Engineering Standards,
C/O INTEVEP TENA Divisin,
Apartado 76343
Caracas 1070A
Venezuela
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CONTROL VALVES
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1 SCOPEThis section covers PDVSA requirements for the design, specification, installationand commissioning of control valves. All guidelines of the introductionspecification K300 shall also be explicitly followed. These specifications alsoserve for valves used on emergency shut off services but attention is drawn toparagraph 4.1.12 with respect to their use.
2 CODES, STANDARDS AND PRACTICESA.N.S.I. B16.104A.P.I. RP550 Manual on refinery instrument installationF.C.I. 702 Valves calculationsI.S.A. R.P.75.01 to 75.16 Standards for control valvesI.S.A. Handbook of control valves.N.A.C.E.
3 DEFINITIONSAll definitions are listed in specification K300.
4 DESIGN REQUIREMENTS
4.1 General
4.1.1 The control valves shall be air operated.
4.1.2 The body shall be 1inch, carbon steel, flanged 300 lbs. A.N.S.I. minimum exceptfor line sizes smaller than 1inch in which case the appropriate line size body shallbe used. The valve trim shall be 316 stainless steel minimum.
4.1.3 Globe or eccentric rotary plug type valves shall be considered the first option. Thetype of internals viz single seat, double seat, cage, LodB, stellited, etc., shall becarefully selected to suit the particular application.
4.1.4 Ball, flangeless eccentric rotary, flangeless butterfly based on 60 maximumopening, angle, etc. type, of valve shall be used depending on the particularapplication subject to PDVSA approval.
4.1.5 The control valve shall be sized taking into account the minimum, normal andmaximum operating conditions. The finally selected item shall ensure that thevalve operates between 17 and 90 percent opening in accordance with I.S.A. S75.11. The valve shall also operate without any cavitation and produce a noiselevel less than 85 dB.
4.1.6 Valves on hydrogen sulfide and other toxic ambience conditions shall conform tothe appropriate N.A.C.E. specifications.
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CONTROL VALVES
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4.1.7 The control valve shall be single seated in tight shut off services. The valveleakage class shall be as per ANSI B16.104/FCI standard 702. An extract fromthe standard is listed below. The seating shall be soft seat or metal to metal to suitthe process operating conditions.
Valve Class Maximum Leakage rate
IV 0.01 % of rated valve capacity
V 5 x 104 ml per minute of water per inch of orifice diameter per psi differential
(5 x 10 12 m3 per second of water per mm of orifice diameter per bar differential)
Nominal Port DiameterVI
Milimeters Inches ml per minute Bubbles per minute
25 1 0.15 1
38 1 1/2 0.30 2
51 2 0.45 3
64 2 1/2 0.60 4
76 3 0.90 6
102 4 1.70 11
152 6 4.00 27
203 8 6.75 45
4.1.8 The speed of response of the valve shall be carefully examined to ensurecompliance with the particular application requirements. For eg. valves incompressor surge system; tanker and other pipeline loading systems are requiredto complete their full travel in 1 to 5 seconds. However caution must be exercisedin determining the full open to full close duration to ensure that there are nooccurrences of surge pressures due to sudden valve closures.
4.1.9 Valves with liners on body and trims with vulcanised liners shall be subject tocareful analysis and PDVSA approval.
4.1.10 Bypass valves shall only be installed after a HAZOP study has been performed.Block valves and bypass manifold shall be in accordance with I.S.A. standard RP75.06.
4.1.11 Three way control valves shall be used, subject to PDVSA approval.
4.1.12 Valves used on emergency shut off service applications shall be dedicated solelyto that service only and shall not be used for normal process control purposes.
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4.2 Control Valve Body
4.2.1 Control valve body material shall conform to the pipe line specification in whichthey are installed. Carbon steel shall be the minimum. The end connections shallconform with the respective piping specificationRF, RTJ, flat face, etc.
4.2.2 Extended Bonnets shall be provided on fluid operating temperatures above 230Cor below 0C.
4.2.3 Bellows seal bonnets shall be provided on all toxic and hazardous fluids and alsowhen it is necessary to ensure no leakage to atmosphere along the stem in orderto comply with E.P.A. emission regulations.
4.2.4 The use of angle valves shall kept to a minimum and are subject to PDVSAapproval.
4.2.5 The use of welded end connections and items on hydrogen, hydrogen sulfide,cryogenic, pipeline services, etc., shall be subject to careful analysis and PDVSAapproval.
4.2.6 Screwed end connections shall only be used on nonhazardous fluids operatingbelow 50C and 50 P.S.I.G. (3.5 kg/cm2) and body sizes below 1inch.
4.3 Valve Trim
4.3.1 The valve C.V. shall be calculated in accordance with equations in ISA standardS 75.01.
4.3.2 The trim type viz. Single or double seat, low noise, cage, soft seat, cavitationfree,etc., shall be selected to suit the particular application.
4.3.3 The valve characteristic viz. equal percentage, linear, onoff, etc., shall beselected to suit the particular application and process operating data.
4.3.4 The ISA handbook shall be used for selection guidance.
4.3.5 Where the selected valve does not comply with requirements of paragraph 4.1.5consideration shall be given to increase the available pressure drop and as a lastresort to installation of two valves in parallel, one large and one small with splitrange operation.
4.3.6 Butterfly valves shall be sized on maximum 60 operation.
4.3.7 The valve plug shall be solid. The trim material shall be 316 stainless steelminimum. Other materials shall be used to suit the fluid erosion and corrosionproperties. Stellite or harder trim material shall be used on:
Flashing fluids
Fluids with entrained solids
Pressure drops over 14 kg/cm2 G. (200 P.S.I.G).
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4.4 PackingTEFLON shall be used for fluid temperatures upto 230C.
GRAFOIL containing zinc corrosion inhibitor shall be used for all highertemperatures.
4.5 Actuators
4.5.1 The actuator shall be corrosion resistant to marine and any other specified toxicambience.
4.5.2 Pneumatic diaphragm or piston type actuator shall be used to ensure that thevalve:
a. Operates correctly under all specified operating conditions
b. Withstands a pressure drop equal to the maximum upstream pressure
c. Speed of response complies with the process operational requirements.
4.5.3 The shaft stem shall be solid and linked positively to the valve plug. Shaft thrustbearings shall be provided as necessary to ensure smooth operation.
4.5.4 The use of electrohydraulic, electric, hydraulic or digital actuators on specialapplications are subject to PDVSA approval.
4.5.5 The fail position of the actuator on the loss of actuating medium fluid viz. air,hydraulic or electric shall be carefully evaluated and specified to ensure safeoperating condition of the plant and/or equipment.
4.6 Positioners
4.6.1 All valves shall be fitted with pneumatic positioners.
Electropneumatic positioners shall be used on all applications where thepositioner operation is not affected by line vibrations.
Exceptions are onoff valves and certain flow or liquid pressure loops where theadded positioner gain could lead to instability. These exceptions are subject toPDVSA approval.
4.6.2 The input signal shall be 3 to 15 P.S.I.G. The output shall suit the selected actuator.
4.6.3 Positioners shall be complete with bypass, input, output and air supply gaugesand an air filter set.
4.6.4 The positioner and all accessories shall be corrosion resistant to marineatmosphere. The tubing between positioner and actuator shall be P.V.C. covered316 stainless steel.
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4.7 Electro Pneumatic Convertors
4.7.1 When specified they shall be suitable for specified 420 or 412 or 1220, m.A.D.C. input operation. The output shall be 315 P.S.I.G. The convertor shall becertified intrinsically safe.
4.7.2 The convertor and all accessories shall be corrosion resistant to marineatmosphere.
4.7.3 The convertor shall be mounted on a suitable vibration free bracket.
4.8 Handwheels
4.8.1 These shall be supplied when specified. They shall be declutchable type with aclear indication of the neutral position.
4.8.2 The handwheel mechanism shall not increase frictional load of the actuator andoperable even against the specified maximum differential pressure.
4.8.3 Clutch/linkage mechanisms on rotary valves shall be designed such that thecontrol of the valve position is not lost when engaging the handwheel.
4.8.4 Hand wheel shall be specified only after a HAZOP study has been performed.
4.9 Solenoid Valves
4.9.1 When specified they shall be installed in the output tubing between the positionerand the valve actuator.
4.9.2 They shall be 3way, 1/4 N.P.T.F. 316 stainless steel body type with resilient seatsand 24 volts D.C hermetically potted coil suitable for operation at 50 C ambienttemperature. They shall be suitable for operation in intrinsically safe circuits andprovided with a manual reset lever when specified.
4.9.3 If an airlock valve is specified for the system the solenoid valve shall be installedbetween the air lock valve and the actuator.
4.10 Limit Switches and Valve Position Transmitters
4.10.1 When specified they shall be linked directly to the valve stem.
4.10.2 The limit switches shall be snap acting hermetically sealed microswitch and ratedfor operation at 1 amp. at 24 volts D.C.
4.10.3 The transmitter output shall be 4 to 20 m.A. D.C.
4.10.4 All electrical items shall be certified for use in intrinsically safe circuits andcorrosion resistant to marine atmosphere.
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4.11 Volume Boosters
4.11.1 Volume boosters shall be installed, when necessary to increase speed ofresponse of the control valve.
4.11.2 The booster shall be installed in the output tubing between the positioner and thevalve actuator.
4.12 Air Lock Valves
4.12.1 When specified the air lock valve shall be installed between the positioner and theactuator.
4.12.2 The air supply for the lock valve shall be the same as for the valve positioner.
4.12.3 The item shall be corrosion resistant to marine atmosphere and the setting shallbe tamperproof.
4.13 Self Acting Regulating Valves
4.13.1 They shall be used on inert services such as water, air or nitrogen and noncriticalservices such as fuel gas to pilot burners.
4.13.2 All actuators shall be capable of withstanding the maximum specified upstreampressure.
4.13.3 Body and trim shall conform with guidelines in this specification.
5 SPECIFICATION FORMS
FORM No. TITLE20.50 Control valves
20.50X On/off valves with positive closure
20.51 Self acting pressure regulator
20.52 Self acting temperature regulator
The forms are included at the end of this specification.
6 INSTALLATION AND COMMISSIONINGAll installation and commissioning shall be performed in accordance with projectdrawings and specifications.
7 Q.A. / Q.C.All items shall conform with the procedures in specification K369.
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CONTROL VALVES
ProcessData
BODY
TRIM
NOTES
Tag No
NonFlashing Flashing Erosive Corrosive With solids
Service
Liquid
PROJECT REFERENCEITEM N QUANTITY
SPECIFICATION REFERENCES I.S.A S 75.01PDVSAK332
N By REVISED DATE
OFF SHEET OF
Gas Steam
UnitsService conditions
Maximum Normal Minimum
C.V.
PSIAK
Pipe line SizeInches INSULATION
Flow rateInlet pressure
TemperatureSpecific gravity or molecular WTViscosityCompressibility factorSpecific heat ratioCritical pressureFor flashing services only
IN
ClassdBNoise level
Required ANSI/FCI LeakageMax. Diff. pressure valve should withstand
C.V.
cPz
SCH OUT SCH
Type
SizeMfr & ModelBody/Bonnet MatlLinerEnd Conn.Flg Face Finish
Flow DirectionBonnetLub & Iso ValvePacking Material
Type
On/Off
Fail ActionWorking PressureBench Range
Input SignalTypeMfr. & ModelOn Incr Signal Output
Type
Mfr. & Model
Contacts/Rating
OrientationHandwheelAir Failure Valve
ACTUATOR
LIMIT SWITCHES
16
171920212224
25
26
272829
End Ext.
56
575862636465
6768
6970
74
75
76
30
32
33
34
Type
Size
Characteristic
Seats
Packing Type
7779
80
1
2
13
35
36
37
39
40
53
81
43
Pc Vapour pressure% FlashCalculatedCalculatedFour
Gas C.V. Liquid C.VSelectedSelected
Five Six (Bubble Tight)
Plug/Ball/Disk Matl.
Seat Material
Soft seat
Cage/Guide Material
Rated
Stem Material
38
Yes No Matl.
Yes No Matl.
Yes No
ANSI Class
Rated Travel
1 2 Balanced Unbal
Cv FL XT
Yes No Matl.
POSITIONER
Modulating Maintain Last Position
Open CloseMx. Min.
STD. OtherYes No Type
Yes No Set at
Actuation Points
Gauges ByPass
Incr Decr
Valve Open Valve ShutMfr. & Model
Set PressureSupply Pressure
Filter GaugesMx. Min.
AIR SET
1. NEC Class2. All items shall be corrosion resistant to marine atmosphere and tropicalised
Group Div. Intrinsically safe
20.50
In Out
Outlet pressure
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REVISION DATE
ENGINEERING SPECIFICATION
INSTRUCTIONS TO FILL FORM 20.50
Page 1
AUG.940
PDVSA 20.50
Men Principal Indice manual Indice volumen Indice norma
CONTROL VALVES
Line Explanation of Terms and Definitions Examples
PROJECT Specify project name for which control valve is intended. XYZ Nuclear Ps
UNIT Specify unit within project. # 1
ITEM Specify item number of purchase order. 3
DATA SHEET Specify data sheet number. Normally assined by purchaser. 3 of 12
SPECIFICATIONREFERENCES
Specify number of technical specification on which valve selection is based. FL13265A
TAG Specify piping and instrumentation diagram number, loop diagram number,engineering flow diagram number, etc.
17453
FLUIDSERVICE Describe service of control valve and/or pipe line number.
Feedwater controlReheat spray
2 MA 1051 WA7
NOTE: The above lines are suggested only and may be modified to fit the individual companys needs. If the provided space isinsufficient, add an additional sheet and refer to it.
Line N Explanation of Terms and Definitions Examples
1 Describe fluid flowing into valve and its state. Indicate corrosive or erosiveservice and the corrosive or erosive agents.
Specify thermodynamic critical pressure of the fluid.
Superheated streamSaturated water
Crude oil and natural gas3206 psia
2Specify volumetric or mass flow rate at inlet or standard conditions. Maximumflow conditions, if greater than normal flow condition, is the condition for whichthe vave is sized.
300 gpm10000 bpd
600 std. m3/s7500 scfm300 kg/h
3 Specify inlet pressure (gauge or absolute) 5000 psig2000 kPa abs.
4 Specify outlet pressure (gauge or absolute) 1000 psig400 kPa gauge
5 Specify inlet temperature in F, R, C or K. Must agree wiht state of fluid.Identify the appropiate term.
750C200C815 K
6 Specify specific weight (in lb/ft3 or kg/m3), specific gravity, or molecularweight of fluid. Identify the appropiate term.
61,9 lb/ft31.0344.01
7 Specify viscosity in appropriate units for liquids or specific heats ratio forgases.
20 centiopoise17.8 centistokes
1.27
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8 Specify vapor (saturation) presure at inlet temperature in absolute units. Onlyrequired for liquid flow.
680 psia.46,9 bar abs.
Specify required Cv as calculated for each condition per ANSI/ISAS75.011986. No additional safety (oversize) factor should be included atthis point.
260
Specify laboratorymeasured allowable and predicted sound pressurelevels, both normally in dBA as measured per ISAS75.071987.
90/87 dBA
12 Extra line form infomation not covered in lines 1 through 11. Compressibily factor ZAmbient temperatue
13 & 14 specify size and schedule (or wall thickness if nonstandard) of pipe line intowhich valve is installed.
8 SCH 4015 OD x 0.500 wall
SN200, PN100
15 Specify pipe line insulation. This information is required for predicted soundpressure level calculations
2 thermalNone
16 Specify type of valve body.
Globe (through, angle)Split body
Double portButterfly
BallPinch
17 Specify nominal size of valve body. Specify ANSI class in accordance withANSI B16 3481
4600
2500 SPECIAL
18 Specify maximum pressure and temperature of the valve 2500 psig, 650F
19 Specify manufacturer and model number XYZ ControlsModel 7192
20 Specify body liner material Steel, ASTM 216,WCB
21 Specify body liner material, if any, and its inside diameter. Polyurethane, 3.9
22 & 23 Specify end connection. May be integral or welded onto body. 6 RTJ Class 1500 flangeButtweld end
2 FNPT
24 Specify flange face finish per ANSI B16.581 or special finish as required. ANSI B16.581Special finish:
32 RMS
25 Specify end extensions, if any. Normally, refers to sections of pipe or reducerswelded to the body by the valve manufacturer.
6 long, SCH 80,A106, GR. B
26 Specify direction of the flow through the body. FTO = flowtoopen, FTC =flowtoclose valve.
FTOFTC
NOTE: The descriptors FTO and FTC refer to the direction of fluid forces on the closure member. If immaterial, leave blank.When FTO and FTC are not applicable, specify direction as appropiate.
27 Specify type of bonnet StandardCooling finExtended
28 Specify whether a lubricator and isolation valve are requiredSpecify lubricant
YesSilicone
29 Specify packing material. Graphite impref. asbestosTPE
Nonasbestos
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PDVSA 20.50
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30 Specify type of packing BraidedMolded Vring
Laminated filamentPressure/Vacuum
31 Extra line for special body or bonnet not covered in lines 16 through 30. Body drainSeparable flanges
Flangeless
32 Specify type of trim Single seat cageguidedMultistageMultihole
Topand bottomguideDouble seat
33 Specify nominal size and rated travel of installed trim 250 mm
34 Specify inherent flow characteristic of installed trim Linear Equal %
Modified parabolicQuick opening
35 Specify whether trim is balanced or unbalanced. Semibalanced trim shouldbe considered as balanced.
BalancedUnbalanced
36 Specify rated Cv, FL and XT of installed trim. Refer to ANSI/ISAS75.01 1986.
2600.90.68
37 Specify closure member, i.e., plug, ball, or disk material as applicable. 174 PH, H1150316
38 Specify seat material. 420 hardened316 hardfaced
39 Specify cage, bearing, or guide material. 410 hardened
40 Specify stem material 174 PH H1150316
41 & 42 Extra lines for additional trim requirements not covered in lines 32 through 40. ChromeplatePilotoperated
43 Specify hazardous location classification per the National Electrical Code ,ANSI/NFPA 701987
NEC Class 1, Div. 1, Group C
4452 Specify special requirements and/or accesories not covered elsewhere. Solenoid valves E/Ptransducer NACE MR0175
SeismicNet Weight = 275 lb
53 Specify type of actuator Diaphragm, pneumaticHydr. piston,
doubleactingPneumatic rotary vane
54 Specify manufacturer and model number. XYZ Controls P100160
55 Specify nominal size and effective diaphragm/piston area. 8160 square inch
0,2 m2
56 Specify whether actuator is for on/off of modulating service. ModulatingOn/off
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57 Specify whether spring/if any, acts to open or to close valve. OpenCloseNone
58 Specify maximum pressure for which the actuator is designed. 100 psig60 kPa
59 Specify minimum pressure required to fully stroke the installed valve underspecified conditions.
65 psig
60 & 61 Specify limits of avalable air or hydraulic suppli pressure. If upper limit isgreater than line 58, a reducing valve (air set) should be furnished. Lower limitor reducing valve setting must be higher than pressure shown on line 59.
90 psig/70 psig
62 Specify the pressures in the actuator when valve stars travel and at its ratedtravel position without fluid forces acting on the valve.
8/32 psig10/22 psig1,2/2,1 kPa
63 Specify orientation of actuator as VERT.UPor VERT.DOWN (vertical) orHORIZ. (horizontal). For rotary valves, also specify whether mounting isRH (righthand) or LH (lefthand) as viewed from valve inlet, ifappropiate. Specify additional information as appropriate or provide sketch.
VERT.UPHORIZ.
RHLH
64 Specify type and orientation of handwheel (manual override), if any. TopmountedSidemounted/LH
65 Specify if air failure valve (actuator air lockup valve) is required and at whatsupply pressure it shuts.
Yes40 psig
66 Extra line for additional actuator requirements not covered in lines 53 through65.
Hydraulic damperStroking speed
I/sec.Stainless steel tubing
67 Spedicy input signal range for full travel. 315 psig200100 kPa
420 mA
68 Specify type of positioner NoneSingle actingDouble acting
69 Specify manufacturer and model number. XYZ Control Co.Model AB
70 Specify whether an increasing signal increases or decreases outputpressure to actuator.
Incr.Decr.
71 Specify whether air pressure gauges and positioner are required. NoYes
72 Specify cam characteristic, if positioner has a cam. Normally linear LinearSquare root
73 Extra line for positioner requirements Aluminumfree
74 Specify type and quantity of limit switches Mech. (lever arm)Proximity
Pneumatic 2
75 Specify manufacturer and model number ABC Electric Co.Model A20Z
76 Specify electrical rating and number of contacts and action 10A, 600 VAC/DPDT
77 Specify valve travel at which switches are to actuate. Full open/full close
79 Specify manufacturer and model number of air set (pressure regulator) RBJ Co.Model R70
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REVISION DATE
ENGINEERING SPECIFICATION
INSTRUCTIONS TO FILL FORM 20.50
Page 5
AUG.940
PDVSA 20.50
Men Principal Indice manual Indice volumen Indice norma
80 Specify output pressure setting 70 psig20 psig
81 Specify whether filter and/or output pressure gauge is required. YesNO
83 Specify pressure of hydrostatic test. Normally per ANSI B16.3780 or API6A83.
3350 psig
84 Specify leakage class per ANSI/FCI 70276. Class IV
85 & 86
NOTES
Extra lines for additional test requirements not covered in lines 83 and 84. Hydro for 30 minutesHelium leak test
Stroking time testDead band test
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ON/OFF VALVES FOR POSITIVE CLOSURE
ProcessData
BODY
TRIM
NOTES
Tag No
NonFlashing Flashing Erosive Corrosive With solids
Service
Liquid
PROJECT REFERENCEITEM N QUANTITY
SPECIFICATION REFERENCES I.S.A S 75.01PDVSAK301
N By REVISED DATE
OFF SHEET OF
Gas Steam
UnitsService conditions
Maximum
C.V.
PSIAK
Pipe line SizeInches INSULATION
Flow rateInlet pressure
TemperatureSpecific gravity or molecular WTViscosityCompressibility factorSpecific heat ratioCritical pressureFor flashing services only
IN
ClassdBNoise level
Required ANSI/FCI LeakageMax. Diff. pressure valve should withstand
C.V.
cPz
SCH OUT SCH
Type
SizeMfr & ModelBody/Bonnet MatlLinerEnd Conn.Flg Face Finish
Flow DirectionBonnetLub & Iso ValvePacking Material
Type
On/Off
Fail ActionWorking PressureBench Range
Input SignalTypeMfr. & ModelOn Incr Signal Output
Type
Mfr. & Model
Contacts/Rating
Orientation
Air Failure Valve
ACTUATOR
LIMIT SWITCHES
16
171920212224
25
26
272829
End Ext.
56
575862636465
67686970
74
75
76
30
32
33
34
Type
Size
Characteristic
Seats
Packing Type
77
79
80
1
2
13
35
36
37
39
40
53
81
43
Pc Vapour pressure% FlashCalculatedCalculatedFour
Gas C.V. Liquid C.VSelectedSelected
Five Six (Bubble Tight)
Plug/Ball/Disk Matl.
Seat Material
Soft seat
Cage/Guide Material
Rated
Stem Material
38
Yes No Matl.
Yes No Matl.
Yes No
ANSI Class
Rated Travel
1 Balanced Unbal
Cv FL XT
Yes No Matl.
POSITIONER
Maintain Last Position
Open CloseMx. Min.
STD. OtherYes No Type
Yes No Set at
Actuation Points
Gauges ByPass
Incr Decr
Valve Open Valve Shut
Mfr. & Model
Set PressureSupply Pressure
Filter GaugesMx. Min.
AIR SET
1. NEC Class2. All items shall be corrosion resistant to marine atmosphere and tropicalised
Group Div. Intrinsically safe
20.50X
In Out
Handwheel
Outlet pressure
-
PRESSURE CONTROL VALVES PILOTS AND REGULATORS
ProcessData
BODY
TRIM
NOTES
Tag No
NonFlashing Flashing Erosive Corrosive With solids
Service
Liquid
PROJECT REFERENCEITEM N QUANTITY
SPECIFICATION REFERENCES I.S.A S 75.01PDVSAK301
N By REVISED DATE
OFF SHEET OF
Gas Steam
Units
Service conditions
Maximum Normal Minimum
C.V.
PSIAK
Pipe line SizeInches INSULATION
Flow rateInlet pressure
TemperatureSpecific gravity or molecular WTViscosityCompressibility factorSpecific heat ratioCritical pressureFor flashing services only
IN
Class
dBNoise levelRequired ANSI/FCI Leakage
Max. Diff. pressure valve should withstand
C.V.
cPz
SCH OUT SCH
TypeSizeMfr & ModelBody/Bonnet MatlLinerEnd Conn.Flg Face Finish
Flow DirectionBonnetLub & Iso ValvePacking Material
Type of Actuator
Supply to PilotSelf Cont. Ext. Conn.Diaphragm Material
Filt. Reg. Supply GageLine StrainerHousing VentInternal Relief
Diaghragm RatingSpring RangeSet Point
ACTUATOR/PILOT161719202122242526272829
End Ext.
2021222324252627
282930313233
30
323334
TypeSizeCharacteristicSeats
Packing Type
1
2
13
353637
3940
19
Pc Vapour pressure% FlashCalculatedCalculatedFour
Gas C.V. Liquid C.VSelectedSelected
Five Six (Bubble Tight)
Plug/Ball/Disk Matl.Seat MaterialSoft seatCage/Guide Material
Rated
Stem Material
38
Yes No Matl.
Yes No Matl.
Yes No
ANSI Class
Rated Travel
1 2 Balanced UnbalCv FL XT
Yes No Matl.
ACCESORIES
20.51
In Out
MFR. Model No
1. All items shall be corrosion resistant to marine atmosphere
Pilot
Outlet pressure
-
REVISION DATE
CATLOGO DE INGENIERA
INSTRUCTIONS TO FILL FORM 20.51
Page 1
AUG.940
PDVSA 20.51
Men Principal Indice manual Indice volumen Indice norma
PRESSURE CONTROL VALVES PILOT & REGULATORS
14. Identification and service or location. It is assumed that each tag numberis for a single valve.
5. Pressure reducing, back pressure control, or differential pressureregulator.
6. Globe, angle, or Manufacturers Standard (MFR.STD.).7. Body connection size and inner valve size.8. Guiding may be top, top and bottom, skirt, or MFR.STD. Select single or
double port, if applicable.9. Specify screwed (NPT), flanged, or weld end; and flange rating, such as
150 lb ANSI.1011 Specify materials.
12. Write in yes or use check mark if required.
13. Quick open, equal percent, linear, etc.
State Characteristic:
L = LinearLV = Linear V PortEP = Equal PercentageEPT = Equal Percentage TurnedEPB = Equal Percentage BalancedQ = Quick Opening
Or use your own code and identify in notes.
14. Refers to seal between body and top works, such as diaphragm, stuffingbox, etc.
15. Refers to seat, plug, stem; in general, all internal wetted parts.16. Use only to specify soft seat, otherwise material will be same as trim
specified in line 14.17. Use if required.18. Max allowable sound level dBA 3 ft from pipe and 3 ft downstream of the
valve outlet.19. Actuator may be spring type or springless pressure balanced.20. The pilot is a integral or external auxiliary device which amplifies the force
available through an operating medium, usually air.21. Give pressure available and specify medium.22. Refers to valve pressure sensing system. Specify whether controlled
pressure is sensed internally or by means of an external line requiring anadditional piping connection.
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REVISION DATE
CATLOGO DE INGENIERA
INSTRUCTIONS TO FILL FORM 20.51
Page 2
AUG.940
PDVSA 20.51
Men Principal Indice manual Indice volumen Indice norma
2324. Specify diaphragm material and pressure or temperature limits, ifapplicable.
25. Range over which pressure setting can be made.
26. Specification of set pressure does not apply to factory setting. This mustbe called for specifically, if required.
27. Specify filter regulator, with or without gage, if required for air supply topilot. Write yes or use check mark.
28. specify if strainer is to be furnished with valve. Write yes to check off;or give style or model number.
3031. Options available in gas regulators. On line 30 specifybugproof ifrequired.
34. State liquid, steam, gas units gpm, lb/h/ft3/min. etc.
35. Name of fluid and state whether vapor or liquid if not apparent.
36. State maximum quantity required by process and corresponding Cv.
37. State operating quantity required by process and corresponding Cv.
38. The manufacturer shall fill in the valve Cv and FL (Liquid Pressure)Recovery Factor without reducers or other accesories.
39. Operating inlet pressure and pressure differential with units (psia, psig,inches H2O or Hg). Note at this point that one might consider howminimum conditions will fit the sizing.
40. Maximum inlet pressure if different from normal.
41. State the maximum pressure drop in shutoff position to determine properactuator size. This is actual difference in inlet and outlet pressure statedin psi, inches of H2O or Hg, etc.
42. State F or C.
43. State operating specific gravity and molecular weight.
44. State operating viscosity and its units. State flash at valve outlet, i.e., ofmax flow that will be flashed to vapor because of the valve pressure drop.
45. In the case of vapor, state superheat and in the cases of liquid, state thesolids, if present.
46. Note vapor pressure of fluid as well as the critical pressure.
47. Give manufacturers predicted sound level dBA.
48. Complete when available.
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SELFACTUATED TEMPERATURE REGULATORS
ProcessData
BODY
TRIM
NOTES
Tag No
NonFlashing Flashing Erosive Corrosive With solids
Service
Liquid
PROJECT REFERENCEITEM N QUANTITY
SPECIFICATION REFERENCES I.S.A S 75.01PDVSAK304
N By REVISED DATE
OFF SHEET OF
Gas Steam
Units
Service conditions
Maximum Normal Minimum
C.V.
PSIAK
Pipe line SizeInches INSULATION
Flow rateInlet pressure
TemperatureSpecific gravity or molecular WTViscosityCompressibility factorSpecific heat ratioCritical pressureFor flashing services only
IN
ClassdBNoise level
Required ANSI/FCI LeakageMax. Diff. pressure valve should withstand
C.V.
cPz
SCH OUT SCH
Type
SizeMfr & ModelBody/Bonnet MatlLinerEnd Conn.Flg Face Finish
Flow DirectionBonnetLub & Iso ValvePacking Material
Insertion Length
Capilllary MaterialArmorCapillary Length
Adjustable Range
Integral Thermometer
Well MaterialWell ConnectionU Dimension T Dim
ACTUATOR/PILOT16
171920212224
25
26
272829
End Ext.
20
21222324252627
282930
31
32
33
30
32
33
34
Type
Size
Characteristic
Seats
Packing Type
1
2
13
35
36
37
39
40
19
Pc Vapour pressure% FlashCalculatedCalculatedFour
Gas C.V. Liquid C.VSelectedSelected
Five Six (Bubble Tight)
Plug/Ball/Disk Matl.
Seat Material
Soft seat
Cage/Guide Material
Rated
Stem Material
38
Yes No Matl.
Yes No Matl.
Yes No
ANSI Class
Rated Travel
1 2 Balanced Unbal
Cv FL XT
Yes No Matl.
ACCESORIES
S20.52
In Out
MFR. Model No
1. All items shall be corrosion resistant to marine atmosphere
Bulb Connection
Fill: SAMA Class
Bulb MaterialExtension Length
16
1718
15
Bullb Type
Outlet pressure
-
REVISION DATE
ENGINEERING SPECIFICATION
INSTRUCTIONS TO FILL FORM 20.52
Page 1
AUG.940
PDVSA 20.52
Men Principal Indice manual Indice volumen Indice norma
SELFACTUATED TEMPERATURE REGULATORS
1. Identification of item by tag number.
2. Process area or function.
3. Stream description and/or pipe size or vessel number with which valve is used..
4. Function heating or cooling.
5. Specify nominal size of body and trim in inches.
6. Single port (SP); 2. Double port (DP); 3. Threeway.
7. Specify screwed or flange rating and facing.
8. Specify material of body such as bronze, carbon steel, cast iron, etc.
9. Specify material of trim such as bronze, 316 stainless steel, etc.
10. State Characteristic:
L = Linear
LV = Linear V Port B = BlendingEP = Equal PercentageEPT = Equal Percentage TurnedEPB = Equal Percentage BalancedQ = Quick operating
Or use your own code and identify in notes.
11. Specify seat material such as 316 stainless steel, Buna N, etc.
12. Specify open or close.
13. Filled thermal system instruments are classified as follows:
Class IA: Liquid filled, uniform scale, fully compensated.Class IB: Liquid filled, uniform scale, case compensated only.Class IIA: Vapor pressure, increasing scale, with measured temp. above
case and tubing temp.Class IIB: Vapor pressure, increasing scale, with measured temp. below
case and tubing temp.Class IIC: Vapor pressure, increasing scale, with measured temp. above
and below case and tubing temp.Class IID: Vapor pressure, increasing scale, above, at, and below case and
tubing temp.Class IIIA: Gas filled, uniform scale, fully compensated.
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REVISION DATE
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INSTRUCTIONS TO FILL FORM 20.52
Page 2
AUG.940
PDVSA 20.52
Men Principal Indice manual Indice volumen Indice norma
Class IIIB: Gas filled, uniform scale, case compensated only.Class VA: Mercury filled, uniform scale, fully compensated.Class VB: Mercury filled, uniform scale, case compensated only.
14. State whether plain, averaging, sanitary bulb.
15. Give material and type of bulb and extension; such as 316 SS.
16. Write in length of extension, adj for adjustable or rgd for rigid.
17. The bulb insertion length should be given if no well data are shown.
18. Specify size of jam nut or union connector; or part number.
19. Specify material of capillary tubing.
20. Specify material of armor (Bronze, 316 SS, etc.) or write None.
21. Specify length in feet.
22. Specify well material such as bronze, 304 stainless steel, 316 stainless steel,monel, etc.
23. Specify process connection size and type, such as 3/4 in. NPT, 1 1/2 in. 150 lbRF, etc.
24. Specify U dimension from face of thread to tip of well. Specify T (laggingextension) dimension in inches.
25. Note adjustable range available from the manufacturer.
26. Specify range, or write in None.
27. State liquid, steam, gas units gpm, lb/h/ft3/min. etc.
28. Name of fluid and state whether vapor or liquid if not apparent.
29. State maximum quantity required by process and corresponding Cv.
30. State operating quantity required by process and corresponding Cv.
31. The manufacturer shall fill in the valve Cv and FL (Liquid Pressure) RecoveryFactor without reducers or other accesories.
32. Operating inlet pressure and pressure differential with units (psia, psig, inchesH2O or Hg). Note at this point that one might consider how minimum conditionswill fit the sizing.
33. Maximum inlet pressure if different from normal.
34. State the maximum pressure drop in shutoff position to determine properactuator size. This is actual difference in inlet and outlet pressure stated in psi,inches of H2O or Hg, etc.
35. State F or C.
36. State operating specific gravity and molecular weight.
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REVISION DATE
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INSTRUCTIONS TO FILL FORM 20.52
Page 3
AUG.940
PDVSA 20.52
Men Principal Indice manual Indice volumen Indice norma
37. State operating viscosity and its unit. State flash at valve outlet, i.e., of max flowthat will be flashed to vapor because of the valve pressure drop.
38. In the case of vapor, state superheat and in the cases of liquids, state the solids,if present.
39. Note vapor pressure of fluid as well as the critical pressure.
40. Give manufacturers predicted sound level dBA.
41. Complete when available.
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Men PrincipalIndice ManualIndice Volumen