ASTM F1985-99(2019)e1
(Specification)Standard Specification for Pneumatic-Operated, Globe-Style, Control Valves
Standard Specification for Pneumatic-Operated, Globe-Style, Control Valves
ABSTRACT
This specification covers the design, construction, testing, and operating requirements for pneumatic-operated, globe-style, control valves complete with actuators for various fluid systems (steam, gas, and liquid applications). The control valves with actuators may be procured under this specification complete with all associated pneumatic instrumentation necessary for the valve to function in the system application. Valves shall be of following material grades: Grade A; Grade B; Grade C; and Grade D. Valves shall be of following pressure rating types: Type 1; Type 2; Type 3; and Type 4. The inherent flow characteristics of the valve shall be specified as quick-opening, linear-opening, equal-percentage opening, or as specified. Visual examination, hydrostatic shell test, nondestructive examination, seat leakage test, and functional test shall be performed to conform with the specified requirements.
SCOPE
1.1 This specification covers the design, construction, testing, and operating requirements for pneumatic-operated, globe-style, control valves complete with actuators for various fluid systems (steam, gas, and liquid applications). The control valves with actuators may be procured under this specification complete with all associated pneumatic instrumentation necessary for the valve to function in the system application; however, complete and detailed requirements for air instrumentation are beyond the scope of this specification and thus are not included here. This specification is not intended to cover quarter-turn or multi-turn stem valves.
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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Designation:F1985 −99 (Reapproved 2019) An American National Standard
Standard Specification for
Pneumatic-Operated, Globe-Style, Control Valves
This standard is issued under the fixed designation F1985; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
ε NOTE—A Keywords section was added editorially in August 2019.
1. Scope B16.5Pipe Flanges and Flanged Fittings NPS 1/2 Through
NPS 24 Metric/Inch Standard
1.1 This specification covers the design, construction,
B16.11Forged Steel Fittings, Socket-Welding andThreaded
testing, and operating requirements for pneumatic-operated,
B16.25Buttwelding Ends
globe-style, control valves complete with actuators for various
B16.24Cast Copper Alloy Pipe Flanges, Flanged Fittings,
fluid systems (steam, gas, and liquid applications).The control
and Valves Classes 150, 300, 600, 900, 1500, and 2500
valves with actuators may be procured under this specification
B16.34Valves – Flanged, Threaded, and Welding End
complete with all associated pneumatic instrumentation neces-
2.3 MSS Standards:
sary for the valve to function in the system application;
MSS SP-25Standard Marking System for Valves, Fittings,
however, complete and detailed requirements for air instru-
Flanges and Unions
mentation are beyond the scope of this specification and thus
are not included here. This specification is not intended to
2.4 FCI Standard:
cover quarter-turn or multi-turn stem valves.
FCI 70-2Control Valve Seat Leakage
1.2 The values stated in SI units are to be regarded as 2.5 Military Standards and Specifications:
standard. The values given in parentheses after SI units are MIL-STD-798 Nondestructive Testing, Welding Quality
providedforinformationonlyandarenotconsideredstandard. Control Material Control and Identification and Hi-Shock
Test Requirements for Piping System Components for
1.3 This international standard was developed in accor-
Naval Ship Use
dance with internationally recognized principles on standard-
MIL-S-901Shock Tests, H.I. (High Impact); Shipboard
ization established in the Decision on Principles for the
Machinery, Equipment and Systems, Requirements for
Development of International Standards, Guides and Recom-
MIL-STD-167-1 Mechanical Vibrations of Shipboard
mendations issued by the World Trade Organization Technical
Equipment (Type I– Environmental and Type II – Inter-
Barriers to Trade (TBT) Committee.
nally Excited)
MS-16142Boss Gasket-Seal Straight Thread Tube Fitting,
2. Referenced Documents
Standard Dimensions for
2.1 The most recent edition or revision of the following
MIL-F-1183Fittings, Pipe, Cast Bronze, Silver Brazing,
standards or specifications shall, to the extent specified in this
General Specification for
specification, form a part of this specification.
MIL-F-20042Flanges, Pipe and Bulkhead, Bronze (Silver
Brazing)
2.2 ASME Standards:
2.6 Government Drawings and Publications:
B1.1Unified Screw Threads (UN and UNR Thread Form)
Naval Sea Systems Command (NAVSEA):
B1.20.1Pipe Threads, General Purpose (Inch)
803-1385946Unions, Bronze, Silver Brazing Alloy. For
B16.1Gray Iron Pipe Flanges and Flanged Fittings Classes
Water, Oil, and Gas
25, 125, and 250
803-1385943Unions, Silver Brazing, 3000 lb/in. , WOG,
NPS, for UT Inspection
This specification is under the jurisdiction of ASTM committee F25 on Ships
and Marine Technology and is the direct responsibility of Subcommittee F25.11 on
Machinery and Piping Systems. AvailablefromManufacturersStandardizationSocietyoftheValveandFittings
Current edition approved Aug. 1, 2019. Published August 2019. Originally Industry(MSS),127ParkSt.,NE,Vienna,VA22180-4602,http://www.mss-hq.org.
approved in 1999. Last previous edition approved in 2011 as F1985–99 (2011). Available from Fluid Controls Institute, Inc, (FCI), 1300 Sumner Ave.,
DOI: 10.1520/F1985-99R19E01. Cleveland, OH 44115, https://www.fluidcontrolsinstitute.org.
2 5
Available from American Society of Mechanical Engineers (ASME), ASME Available from U.S. Government Printing Office, Superintendent of
International Headquarters, Two Park Ave., New York, NY 10016-5990, http:// Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http://
www.asme.org. www.access.gpo.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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F1985−99 (2019)
803-1385884Unions, Butt and SocketWelding, 6000 lb/in. 3.1.13 manual override, n—the manual override allows
WOG, NPS, For UT Inspections valve operation manually.The manual override feature has the
2.7 ISA Standard: ability to oppose and overcome an opening or closing pneu-
ISA-S75.05Standard for Control Valve Terminology matic control signal in controlling valve position.
3.1.14 pneumatic-operated control valve—a valve installed
3. Terminology
directlyinthefluidsystem,whichtranslatesapneumaticsignal
3.1 Definitions of Terms Specific to This Standard:
into a change in flow resistance for the system fluid.
3.1.1 actuator, n—the unit that converts a pneumatic pres-
3.1.15 pressure rating, n—the pressure rating of the valve
sure signal into a force to position the valve plug.
shall be as defined in the documents listed in Table 1. The
3.1.2 bonnet, n—the upper portion of the valve body sub-
pressure ratings (also called pressure-temperature ratings)
assembly to which the yoke attaches. The bonnet contains the
establish the maximum allowable working (service) pressures
valve stem packing.
of a component (valve, end connections, and so forth) at
3.1.3 dead band, n—the range through which input signal various temperatures.
canbevaried,uponreversalofdirection,withoutanobservable
3.1.16 quick change cage trim, n—a gasket or an O-ring
change in the value stem position.
sealedseatringheldinpositionbyacage,whichmaybeeither
3.1.4 equal-percentage opening, n—an equal-percentage separate from or integral with the seat ring.The cage is held in
flowcharacteristicofacontrolvalveprovidesachangeinflow, position by either the bonnet or bottom flange. This design
withthechangeinvalvelift,thatisaconstantpercentageofthe
flow before the change was made.
TABLE 1 Pressure Ratings for Control Valves
3.1.5 flow coeffıcient (C ), n—A basic capacity rating for
V
Applicable Documents for
valves that relates flow rate to the inlet and outlet pressure for
Type of
Pressure Rating Dimensional Details of End
End Connection
a particular fluid in the full-open position of the valve. It is
Connections
defined as the number of litres per seconds (gallons/min) of
Butt-welded ASME B16.34 ASME B16.25
16°C (60°F) water that will flow through the valve with a 6.9 Class 150, 300, 400, 600,
900, 1500, 2500, or 4500
kPa (1 psi) pressure drop (∆p) across the valve.
3.1.6 globe-style valve, n—a basic control valve type that Socket-welded ASME B16.34 ASME B16.11
Class 150, 300, 400, 600,
gets its name from the globular shape of its body. It normally
900, 1500, 2500, or 4500
uses a basic rising stem/plug for the closure member.
Flanged ASME B16.34 ASME B16.5
3.1.7 hydrostatic shell test pressure, n—the hydrostatic test
Class 150, 300, 400, 600,
pressure that the valve body is required to withstand without
900, 1500, 2500
damage or leakage. Valve operation is not required during
Flanged ASME B16.1 ASME B16.1
application of this test pressure, but the valve shall meet all
(cast iron valves only) Class 125, 250
performancerequirementsafterthepressurehasbeenremoved.
Flanged ASME B16.24 ASME B16.24
3.1.8 hysteresis, n—themaximumdifferenceinoutputvalue
(bronze) Class 150, and 300
for any single input value during a calibration cycle, excluding
Flanged-navy MIL-F-20042 MIL-F-20042
errors as a result of dead band.
(bronze) Class 150, 250, 400
3.1.9 instrumentation, n—the term instrumentation, when
Threaded ASME B16.34 ASME B1.20.1
used in this specification, refers to any instrumentation, that is,
(tapered pipe thread) Class 150, 300, 400, 600, and ASME B16.11
pilot controllers, transmitters, relays, selectors, positioners,
900, 1500, or 2500
instrumentairreducingvalves,andstrainers/filtersrequiredfor
A
Union-end , MIL-F-1183 MIL-F-1183
operation of the control valve in the system.
silver-brazed
(O-ring type) (O-ring type)
2 2
3.1.10 internal trim, n—internal parts of the control valve, 400 lb/in. 400 lb/in.
including seat rings, plug, stem, guide bushings, cage, pistons,
A
Union-end, 803-1385946 803-1385946
and so forth.
2 2
silver-brazed
1500 lb/in. 1500 lb/in.
3.1.11 linear-opening, n—alinear-openingflowcharacteris-
A
Union-end, 803-1385943 803-1385943
tic of a control valve provides a change in flow that is linearly
2 2
silver-brazed
3000 lb/in. 3000 lb/in.
proportional with valve lift.
A
Union-end, 803-1385884 803-1385884
3.1.12 linearity, n—the measure of how close a plot of the 2 2
butt/socket weld
6000 lb/in. 6000 lb/in.
valvestemtravel(inresponsetoanincreasingandadecreasing
Other, as specified as specified as specified
input signal) conforms to a straight line. Linearity is normally
A
For union inlet and outlet end connections, only the pertinent dimensions listed
expressed as the ratio (in percentage) of the maximum devia-
intheapplicabledocuments(MilitarySpecificationorNAVSEArequirements)shall
tion from a straight line connecting the end points of the full
apply.UnlessotherwisespecifiedintheorderingdataSection5,thetailpiecesand
operational valve stem stroke. the union-nuts shall not be furnished—only the thread-pieces shall be furnished. If
tailpieces and union-nuts are required, their materials of construction shall be in
accordance with the applicable documents listed above and shall be specified in
Available from International Society ofAutomation (ISA), 67 T.W.Alexander
the ordering data Section 5.
Drive, PO Box 12277, Research Triangle Park, NC 27709, https://www.isa.org.
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F1985−99 (2019)
shall permit the rapid replacement of all internal trim by 5. (Additional guidance on valve flow characteristics can be
avoiding the use of any threads located within the valve body, found in ISA Handbook of Control Valves.)
such as seat ring threads.
4.6 End Connections—Valve shall have end connections
3.1.17 quick-opening, n—a quick-opening flow characteris-
selectedfromthoselistedinTable1andspecifiedinSection5.
tic of a control valve provides large changes in flow for small
4.7 Sizes—Valve size shall be as specified in Section 5.
changes in valve lift.
3.1.18 rangeability, n—a measure of the usable range of a
5. Ordering Information
control valve and defined as the ratio of the maximum to the
5.1 Ordering documentation for valves under this specifica-
minimum controllable C . These maximum and minimum
V
tion shall include the following information, as required, to
controllable C s establish the throttling range over which a
V
describe the equipment adequately:
given control characteristic can be maintained and within
5.1.1 ASTM designation and year of issue,
which the valve can perform a useful throttling function.
5.1.2 Material grade (see 4.1 and Table 1),
3.1.19 travel indicator, n—themovingpointermechanically
5.1.3 Pressure rating (see 4.2),
attached to the valve stem and working in conjunction with a
5.1.4 Pressure drop (∆p), kPa (psi),
fixed indicator scale attached to the yoke.
5.1.5 Type (see 4.3),
3.1.20 three-way valve, n—a three-way valve has three end
5.1.6 Seat leakage class (see 4.4),
connections configured for converging or diverging flow.
5.1.7 Flow characteristics (see 4.5),
3.1.21 valvebodysubassembly,n—thecombinationofvalve
5.1.8 End connections (see 4.6),
body, bonnet, end connections, and internal trim.
5.1.9 Size, inlet, and outlet (see 4.7),
5.1.10 Rangeability (see 7.2),
3.1.22 yoke, n—the intermediate piece between the valve
bonnet and the actuator. 5.1.11 Line medium (see 6.2),
5.1.12 Operating pressures of the line media (minimum,
3.2 Additional guidance on the control valve terminology
normal, and maximum) (see 6.16),
can be found in ISA-S75.05.
5.1.13 Inlet temperature of the line media (minimum,
normal, and maximum) (see 6.16),
4. Classification
5.1.14 Flow rate required (minimum, normal, and maxi-
4.1 Valves shall be of the following material grades, pres-
mum) (see 7.1),
sure ratings, types, seat leakage classes, flow characteristics,
5.1.15 Replaceable seat ring requirement (see 6.13),
and sizes, as specified in Section 5.
5.1.16 Minimum available air supply pressure to the actua-
4.1.1 Material Grades (Applicable to Pressure Containing
tor (see 6.16),
Parts Only):
5.1.17 Minimum and maximum actuator control signal
4.1.1.1 Grade A—Alloy Steel—Material Group 1.9 of
pressure, kPa (psi) (benchset of the actuator),
1 1 1
ASME B16.34 (1 Cr- ⁄2 Mo, or 1- ⁄4 Cr- ⁄2 Mo).
5.1.18 When manual override feature is required, its
4.1.1.2 Grade B—Carbon Steel—Material Group 1.1 of
location—top or side-mounted (see 6.14.3),
ASME B16.34.
5.1.19 Valvefail-positionrequireduponlossofairsupplyto
4.1.1.3 Grace C—Corrosion-Resistance Stainless Steel—
the actuator (see 6.14.4)
Material Group 2.2 of ASME B16.34 (18 Cr-8 Ni alloy).
5.1.20 Instrumentation requirements (see 6.15),
4.1.1.4 Grade D—As specified in the ordering information
5.1.21 Supplementaryrequirements,ifany(seeSupplemen-
(see Section 5.)
tary Requirements, S1, S2, or S3).
4.2 Pressure Ratings—Valve shall have pressure ratings
selectedfromthoselistedinTable1andspecifiedinSection5.
6. Valve Construction
4.3 Types:
6.1 Valves shall incorporate the design features specified
4.3.1 Type 1—Two-way valve, in-line (two end connec-
below:
tions).
6.1.1 General Requirements:
4.3.2 Type 2—Two-wayvalve,angle(twoendconnections).
6.1.1.1 Design shall permit adjustment without requiring
4.3.3 Type 3—Three-way valve, converging service (three removal of the valve body from the line.
end connections—two inlet and one outlet end connections).
6.2 Materials of Construction—Materials for pressure-
4.3.4 Type4—Three-wayvalve,divergingservice(threeend
containing parts shall be in accordance with the applicable
connections—one inlet and two outlet end connections).
documents listed in Table 1 (see 4.1). Materials for internal
4.4 Seat Leakage Classes (Maximum Allowable Seat parts shall be compatible with the line media specified in
Leakage)—Seat leakage class shall be selected from those
Section 5.
listed in FCI 70-2 and specified in Section 5.
6.3 Pressure Envelope—Thecontrolvalveshallbedesigned
4.5 Flow Characteristics—The inhere
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