ASTM F1985-1999(2005) Standard Specification for Pneumatic-Operated Globe-Style Control Valves《气动球形控制阀标准规范》.pdf

1、Designation: F 1985 99 (Reapproved 2005)An American National StandardStandard Specification forPneumatic-Operated, Globe-Style, Control Valves1This standard is issued under the fixed designation F 1985; the number immediately following the designation indicates the year oforiginal adoption or, in th

2、e case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the design, construction, test-ing, and operating requireme

3、nts for pneumatic-operated, globe-style, control valves complete with actuators for various fluidsystems (steam, gas, and liquid applications). The controlvalves with actuators may be procured under this specificationcomplete with all associated pneumatic instrumentation neces-sary for the valve to

4、function in the system application;however, complete and detailed requirements for air instru-mentation are beyond the scope of this specification and thusare not included here. This specification is not intended tocover quarter-turn or multi-turn stem valves.1.2 The values stated in SI units are to

5、 be regarded as thestandard. The values given in parentheses are for informationonly.2. Referenced Documents2.1 The most recent edition or revision of the followingstandards or specifications shall, to the extent specified in thisspecification, form a part of this specification.2.2 ASME Standards:2B

6、1.1 Unified Screw Threads (UN and UNR Thread Form)B1.20.1 Pipe Threads, General Purpose (Inch)B16.1 Cast Iron Pipe Flanges and Flanged Fittings, Class25, 125, 250 and 800B16.5 Pipe Flanges and Flanged FittingsB16.11 Forged Steel Fittings, Socket-Welding and ThreadedB16.25 Buttwelding EndsB16.24 Bron

7、ze Pipe Flanges and Flanged fittings, Class 150and 300B16.34 Valves - Flanged and Buttwelding End Steel, NickelAlloy, and Other Special Allows2.3 Manufacturers Standardization Society of the Valve andFitting Industry:3MSS SP-25 Standard Marking System for Valves, Fittings,Flanges and Unions2.4 Fluid

8、 Controls Institute Standard:4FCI 70-2 Control Valve Seat Leakage2.5 Military Standards and Specifications:5MIL-STD-798 Nondestructive Testing, Welding QualityControl Material Control and Identification and Hi-ShockTest Requirements for Piping System Components forNaval Ship UseMIL-S-901 Shock Tests

9、, H.I. (High Impact); ShipboardMachinery, Equipment and Systems, Requirements forMIL-STD-167-1 Mechanical Vibrations of ShipboardEquipment (Type I Environmental and Type II Inter-nally Excited)MS-16142 Boss Gasket-Seal Straight Thread Tube Fitting,Standard Dimensions forMIL-F-1183 Fittings, Pipe, Ca

10、st Bronze, Silver Brazing,General Specification forMIL-F-20042 Flanges, Pipe and Bulkhead, Bronze (SilverBrazing)2.6 Government Drawings and Publications:Naval Sea Systems Command (NAVSEA):5803-1385946 Unions, Bronze, Silver Brazing Alloy. ForWater, Oil, and Gas803-1385943 Unions, Silver Brazing, 30

11、00 lb/in.2, WOG,NPS, for UT Inspection803-1385884 Unions, Butt and SocketWelding, 6000 lb/in.2WOG, NPS, For UT Inspections2.7 ISA Standard:6ISA-S75.05 Standard for Control Valve Terminology3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 actuatorthe unit that converts a pneumat

12、ic pressuresignal into a force to position the valve plug.1This specification is under the jurisdiction of ASTM committee F25 on Shipsand Marine Technology and is the direct responsibility of Subcommittee F25.11 onMachinery and Piping Systems.Current edition approved May 1, 2005. Published May 2005.

13、 Originallyapproved in 1999. Last previous edition approved in 1999 as F 1985 99.2Available from American Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Three Park Ave., New York, NY 10016-5990.3Available from Manufacturers Standardization Society of the Valve and FittingsIn

14、dustry (MSS), 127 Park St., NE, Vienna, VA 22180-4602.4Available from Fluid Controls Institute, 1300 Sumner Ave., Cleveland, OH44115.5Available from U.S. Government Printing Office Superintendent of Documents,732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401.6Available from International

15、Society for Measurement and Control, 67 Alex-ander Dr., PO Box 12277, Research Triangle Park, NC 27709.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.1.2 bonnetthe upper portion of the valve body subas-sembly to which the yoke att

16、aches. The bonnet contains thevalve stem packing.3.1.3 dead bandthe range through which input signal canbe varied, upon reversal of direction, without an observablechange in the value stem position.3.1.4 equal-percentage openingan equal-percentage flowcharacteristic of a control valve provides a cha

17、nge in flow, withthe change in valve lift, that is a constant percentage of the flowbefore the change was made.3.1.5 flow coeffcient (CV)A basic capacity rating forvalves that relates flow rate to the inlet and outlet pressure fora particular fluid in the full-open position of the valve. It isdefine

18、d as the number of litres per seconds (gallons/min) of16C (60F) water that will flow through the valve with a 6.9kPa (1 psi) pressure drop (Dp) across the valve.3.1.6 globe-style valvea basic control valve type that getsits name from the globular shape of its body. It normally usesa basic rising ste

19、m/plug for the closure member.3.1.7 hydrostatic shell test pressurethe hydrostatic testpressure that the valve body is required to withstand withoutdamage or leakage. Valve operation is not required duringapplication of this test pressure, but the valve shall meet allperformance requirements after t

20、he pressure has been removed.3.1.8 hysteresisthe maximum difference in output valuefor any single input value during a calibration cycle, excludingerrors as a result of dead band.3.1.9 instrumentationthe term instrumentation, whenused in this specification, refers to any instrumentation, that is,pil

21、ot controllers, transmitters, relays, selectors, positioners,instrument air reducing valves, and strainers/filters required foroperation of the control valve in the system.3.1.10 internal triminternal parts of the control valve,including seat rings, plug, stem, guide bushings, cage, pistons,and so f

22、orth.3.1.11 linear-openinga linear-opening flow characteristicof a control valve provides a change in flow that is linearlyproportional with valve lift.3.1.12 linearitythe measure of how close a plot of thevalve stem travel (in response to an increasing and a decreasinginput signal) conforms to a st

23、raight line. Linearity is normallyexpressed as the ratio (in percentage) of the maximum devia-tion from a straight line connecting the end points of the fulloperational valve stem stroke.3.1.13 manual overridethe manual override allows valveoperation manually. The manual override feature has the abi

24、lityto oppose and overcome an opening or closing pneumaticcontrol signal in controlling valve position.3.1.14 pneumatic-operated control valvea valve installeddirectly in the fluid system, which translates a pneumatic signalinto a change in flow resistance for the system fluid.3.1.15 pressure rating

25、the pressure rating of the valveshall be as defined in the documents listed in Table 1. Thepressure ratings (also called pressure-temperature ratings)establish the maximum allowable working (service) pressuresof a component (valve, end connections, and so forth) atvarious temperatures.3.1.16 quick c

26、hange cage trima gasket or an O-ringsealed seat ring held in position by a cage, which may be eitherseparate from or integral with the seat ring. The cage is held inposition by either the bonnet or bottom flange. This designshall permit the rapid replacement of all internal trim byavoiding the use o

27、f any threads located within the valve body,such as seat ring threads.3.1.17 quick-openinga quick-opening flow characteristicof a control valve provides large changes in flow for smallchanges in valve lift.3.1.18 rangeabilitya measure of the usable range of acontrol valve and defined as the ratio of

28、 the maximum to theminimum controllable CV. These maximum and minimumcontrollable CVs establish the throttling range over which agiven control characteristic can be maintained and withinwhich the valve can perform a useful throttling function.3.1.19 travel indicatorthe moving pointer mechanicallyatt

29、ached to the valve stem and working in conjunction with afixed indicator scale attached to the yoke.TABLE 1 Pressure Ratings for Control ValvesType ofEnd ConnectionPressure RatingApplicable Documents forDimensional Details of EndConnectionsButt-welded ASME B16.34Class 150, 300, 400, 600,900, 1500, 2

30、500, or 4500ASME B16.25Socket-welded ASME B16.34Class 150, 300, 400, 600,900, 1500, 2500, or 4500ASME B16.11Flanged ASME B16.34Class 150, 300, 400, 600,900, 1500, 2500ASME B16.5Flanged(cast iron valves only)ASME B16.1Class 125, 250ASME B16.1Flanged(bronze)ASME B16.24Class 150, and 300ASME B16.24Flan

31、ged-navy(bronze)MIL-F-20042Class 150, 250, 400MIL-F-20042Threaded(tapered pipe thread)ASME B16.34Class 150, 300, 400, 600,900, 1500, or 2500ASME B1.20.1and ASME B16.11Union-endA,silver-brazedMIL-F-1183(O-ring type)400 lb/in.2MIL-F-1183(O-ring type)400 lb/in.2Union-end,Asilver-brazed803-13859461500 l

32、b/in.2803-13859461500 lb/in.2Union-end,Asilver-brazed803-13859433000 lb/in.2803-13859433000 lb/in.2Union-end,Abutt/socket weld803-13858846000 lb/in.2803-13858846000 lb/in.2Other, as specified as specified as specifiedAFor union inlet and outlet end connections, only the pertinent dimensions listedin

33、 the applicable documents (Military Specification or NAVSEArequirements) shallapply. Unless otherwise specified in the ordering data Section 5, the tailpieces andthe union-nuts shall not be furnishedonly the thread-pieces shall be furnished. Iftailpieces and union-nuts are required, their materials

34、of construction shall be inaccordance with the applicable documents listed above and shall be specified inthe ordering data Section 5.F 1985 99 (2005)23.1.20 three-way valvea three-way valve has three endconnections configured for converging or diverging flow.3.1.21 valve body subassemblythe combina

35、tion of valvebody, bonnet, end connections, and internal trim.3.1.22 yokethe intermediate piece between the valve bon-net and the actuator.3.2 Additional guidance on the control valve terminologycan be found in ISA-S75.05.4. Classification4.1 Valves shall be of the following material grades, pres-su

36、re ratings, types, seat leakage classes, flow characteristics,and sizes, as specified in Section 5.4.1.1 Material Grades (Applicable to Pressure ContainingParts Only):4.1.1.1 Grade AAlloy SteelMaterial Group 1.9 ofASME B16.34 (1 Cr-12 Mo, or 1-14 Cr-12 Mo).4.1.1.2 Grade BCarbon SteelMaterial Group 1

37、.1 ofASME B16.34.4.1.1.3 Grace CCorrosion-Resistance Stainless SteelMaterial Group 2.2 of ASME B16.34 (18 Cr-8 Ni alloy).4.1.1.4 Grade DAs specified in the ordering information(see Section 5.)4.2 Pressure RatingsValve shall have pressure ratingsselected from those listed in Table 1 and specified in

38、Section 5.4.3 Types:4.3.1 Type 1Two-way valve, in-line (two end connec-tions).4.3.2 Type 2Two-way valve, angle (two end connections).4.3.3 Type 3Three-way valve, converging service (threeend connectionstwo inlet and one outlet end connections).4.3.4 Type 4Three-way valve, diverging service (threeend

39、 connectionsone inlet and two outlet end connections).4.4 Seat Leakage Classes (Maximum Allowable SeatLeakage)Seat leakage class shall be selected from thoselisted in FCI 70-2 and specified in Section 5.4.5 Flow CharacteristicsThe inherent flow characteristicsof the valve shall be specified as quick

40、-opening, linear-opening, equal-percentage opening, or as specified in Section5. (Additional guidance on valve flow characteristics can befound in ISA Handbook of Control Valves).4.6 End ConnectionsValve shall have end connectionsselected from those listed in Table 1 and specified in Section 5.4.7 S

41、izesValve size shall be as specified in Section 5.5. Ordering Information5.1 Ordering documentation for valves under this specifica-tion shall include the following information, as required, todescribe the equipment adequately:5.1.1 ASTM designation and year of issue,5.1.2 Material grade (see 4.1 an

42、d Table 1),5.1.3 Pressure rating (see 4.2),5.1.4 Pressure drop (Dp), kPa (psi),5.1.5 Type (see 4.3),5.1.6 Seat leakage class (see 4.4),5.1.7 Flow characteristics (see 4.5),5.1.8 End connections (see 4.6),5.1.9 Size, inlet, and outlet (see 4.7),5.1.10 Rangeability (see 7.2),5.1.11 Line medium (see 6.

43、2),5.1.12 Operating pressures of the line media (minimum,normal, and maximum) (see 6.16),5.1.13 Inlet temperature of the line media (minimum, nor-mal, and maximum) (see 6.16),5.1.14 Flow rate required (minimum, normal, and maxi-mum) (see 7.1),5.1.15 Replaceable seat ring requirement (see 6.13),5.1.1

44、6 Minimum available air supply pressure to the actua-tor (see 6.16),5.1.17 Minimum and maximum actuator control signalpressure, kPa (psi) (benchset of the actuator),5.1.18 When manual override feature is required, itslocationtop or side-mounted (see 6.14.3),5.1.19 Valve fail-position required upon l

45、oss of air supply tothe actuator (see 6.14.4)5.1.20 Instrumentation requirements (see 6.15),5.1.21 Supplementary requirements, if any (see Supplemen-tary Requirements, S1, S2, or S3).6. Valve Construction6.1 Valves shall incorporate the design features specifiedbelow:6.1.1 General Requirements:6.1.1

46、.1 Design shall permit adjustment without requiringremoval of the valve body from the line.6.2 Materials of ConstructionMaterials for pressure-containing parts shall be in accordance with the applicabledocuments listed in Table 1 (see 4.1). Materials for internalparts shall be compatible with the li

47、ne media specified inSection 5.6.3 Pressure EnvelopeThe control valve shall be designedto pass a hydrostatic shell test at pressure(s) of at least 1.5times the 38C (100F) pressure rating(s) of the valve withoutdamage.6.4 JointsThe bonnet and bottom cover/flange shall beattached to the body using bol

48、ted flanges, a threaded connec-tion, or a threaded-union connection.6.5 Valve SpringsAny spring incorporated in the controlvalve shall not be compressed solid during operation. Springends shall be squared and ground.6.6 ThreadsThreads shall be as specified in ASME B1.1.Where necessary, provisions sh

49、all be incorporated to preventthe accidental loosening of threaded parts. The design shall besuch that standard wrenches can be used on all external bolting.Lock-wire shall not be used. Any exposed threads shall beprotected by plastic caps for shipping.6.7 InterchangeabilityThe control valve, including allassociated piece parts, shall have part number identity and shallbe replaceable from stock by the manufacturer on a nonselec-tive and random basis. Parts having the same manufacturerspart number shall be directly interchangea