ISS SP-b7 95 5770640 0500452 TLT W
STANDARD PRACTICE SP-67
1995
Edition
BUTTERFLY VALVES
Developed and Approved
by the
Manufacturers Standardization Society
of the
Valve and Fittings Industry, Inc.
127 Park Street, N.E.
Vienna, Virginia 221 80
(703) 28 1-661 3
Originally Approved May 1964
COPYRIGHT Manufacturers Standardization Society of the Valve and Fittings
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MSS SP-67 95 57706400500453 956
MSS STANDARD PRACTICE SP-67
An MSS Standard Practiceis intended as ? practice
by the manufacturer, theuser, and the general public. The existence of
an MSS Standard Practice does notin itself preclude the manufacture,
sale, or use of products not conforming to the Standard Practice.
Mandatory conformance is established only by reference in ? ication, sales contract, or public law, as applicable.
US. customary units in this SP are the standard; the metric units are for reference only.
Substantive changes in this 1995 edition are “flagged”by
parallel bars asshown on the marginsof this paragraph. The
specific detail of the changemay be determined by comparing
I the material flagged with that in the previous edition. I
Any part of this standard may be quoted. Credit lines should read ‘Extracted from MSS SPd7-1995, with
permission of the publisher, theManufacturers Standardization Society.’ Reproduction prohibited under
copyright convention unless written permission is granted by the ManufacturersStandardization Society of the
Valve and Fittings Industry, Inc.
Copyright 0, 1983 by
Manufacturers Standardization Society
of the
Valve and Fittings Industry, Inc.
Printed in U.S.A.COPYRIGHT Manufacturers Standardization Society of the Valve and Fittings
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MSS SP-67 95 ? 892
MSS STANDARD PRACTICE SP47
CONTENTS
SECTION PAGE
CONTENTS .............ii
1. SCOPE ........... 1
2 ? ARDS ........... 1
3 ? ........ 1
4. STANDARDENDS ............. 2
5 ? NTS ...... 2
6. VALVE DISCCLEARANCE ............ 4
7 ? .. 4
8 ? ENSIONS ......... 4
9 ? ....... 4
10 ? MATION ......... 4
11. PRODUCTIONTESTING ........ 5
12. MARKING .............. 6
TABLE ? AMETER FOR DISC CLEARANCE ........ 6
2 .FACE-TO-FACE DIMENSIONS, FLANGED END VALVES ... 7
3 .FACE-TO-FACE DIMENSIONS, SINGLE FLANGE AND
FLANGELESS VALVES .......... 8
4 .END-TO-END DIMENSIONS, GROOVED END VALVES ..... 9
FIGURE ? FLANGELESS AND SINGLE FLANGE VALVES ... 10
2 ? LTING OPTIONS ..... 11
3 .SINGLE FLANGED. BOLTING OPTIONS .......... 11
'4 .FLANGELESS. BOLTING OPTIONS ........ 11
5 .END.TO.END, GROOVEDEND VALVES .......... 12
6 ? ALVES ...... 12
7 ? NIMUM CLEARANCE, TYPICAL
CONCENTRICTYPE CONSTRUCTION ........ 13
ANNEX ? EARANCE ........ 14
TABLE Al .DISC TO PIPE MINIMUM CLEARANCE .... 14
..
11
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MSS STANDARD PRACTICE SP47
BUTTERFLY VALVES
1. SCOPE~ ASME/ ANSI:
B16.1-1989 Cast Iron Pipe Flanges and
1.1 This Standard Practice covers dimensions, Flanged Fittings
design, testing andmarking requirements for B1651988 Pipe Flanges andFlanged Fittings
butterfly valves. Further reference should be B16.34-1988Valves ? edand
made to the MSS Standard Practice for Hi ? Pressure ? terfly Valves, SP8 8. B16.42-1987 Ductile-IronPipe Flanges and
Flanged Fittings, Classes 150 and
1.2 This Standard Practice covers two types of 300
butterfly valves:
MSS:
Type ? ght shut-off SP-25-1993 StandardMarking System for
(tested per subsection 11.2.1).Valves, Fittings, Flanges and
Unions
TypeII ? ng seat leakage SP-68-1988 High Pressure-Offset Seat Butterfly
(see subsection ? br>SP-91-1992 Guidelines forManual Operation
1.3 This Standard Practice covers flangeless of Valves
(wafer-type), single flange (lug-type), and flanged
end valves in sizes1 '/2 NPS thru 72 NPS, grooved
end valves, and shouldered endvalves with
pressure ratings in accordance with the require- 3. DEFINITIONS
ments of Sections ? ace-to-Face of Valve Before Installation -
This is the dimension of the valve face-to-face
2. ? DARDS ? stalled in the pipe line. It does not
include the thickness of gaskets if separate
ANSI/ ASME: gaskets are used. It does include the thickness of
B36.10M-1985 Welded and Seamless Wrought gaskets or seals that are an integral part of the
Steel Pipe valve and this dimension is before these gaskets
ANSI/ AWWA or seals are compressed.
Cl 15/ A21.15-88 Flanged Ductile-Iron Pipewith
Threaded Flanges 3.2 Face-to-Face of Valve Installed ? /A21.51-91 Ductile-Iron Pipe, Centrifugally the dimension of the valve face-to-face after it is
Cast, for Wateror OtherLiquids installed in the pipe line. It does not include the
thickness of gaskets if separate gaskets are used.
C207-94 SteelPipe Flanges for Waterworks
Service ? 44 in. It does include the thickness of gaskets or seals
that are an integral part of the valve, however
(l00mm through 360mm)
this dimension is established with the gaskets or
C50494Rubber-Seated Butterfly Valves
seals compressed. See Fig. ? >c606-87 GroovedandShouldered Joints Table 3.
ASME:
B1.1-1989Unified InchScrewThreads 3.3 Face-to-FaceValve of and Gaskets In-
B16.24-1991 CastCopper Alloy Pipe Flanges, stalled ? ension of the valve face-
Class 150,300,400,600,900,1500 to-face including separate gaskets when installed
and 2500, and Flanged Fittings, in the pipe line. This dimension must be estab-
Class 150 and 300 lished using the thickness of the valve face-to-
EUR316.47-1990 LargeDiameter Steel Flanges, face dimension andthe compressed thickness of
NPS 26 ThroughNPS 60 the gaskets to usedbe in such installations.
Boiler and Pressure Vessel Code ? HT Manufacturers Standardization Society of the Valve and Fittings
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3.4 CWP ? essure (PSIG) ? conform to the applicable
The pressure rating for the pressure containing ? ASME/ANSI B16.34 shall I
components of the valve at temperatures up to have body pressure-temperature ratings in
and including 100'F. accordance with that standard. For valves that
do not conform to the applicable requirements
3.5 System Pressure ? ed ? 6.34, 5.1.1.2 or 5.1.1.3 shall I
operating pressure for the application. be used to determine the minimum required wall
thickness.
3.6 Differential Pressure ? in
pressure between two points located on opposite 5.1.1.2Valves that do notconform to the
sides of the valve disc. ? irements of ASME/ ANSIB16.34 I
shall have their minimum wall thickness deter-
3.7 Shut-Off Pressure ? fer- mined using the following equation:
ential pressure with the valve in the fully closed
position. ? NDARD ENDS
Where ? ng at temperature under
4.1 Flanged Ends ? compatible consideration, psi
for use with flanges to ASME/ANSI B16.1
Class 25 or 125, ASME/ANSI B16.5 Class 150, ? ofvalve body (or
ASME B16.47 Class 150 Series A, ASME shaft bore in body for the bodyneck
B16.24 Class 150, ASME/ANSI B16.42 Class of flangeless valves), in
150 or ANSI/AWWA C-207. Figure 2illustrates
bolting options. ? ess, psi
4.2 Single Flange (Lug Type)- Valves shall be The allowable stress shall be takenfrom the
compatible foruse with flanges to ASME/ ANSI ASME Boiler and Pressure Vessel Code, Sec-
B16.1 Class 25 or 125, ASME/ANSI B16.5 tion ? ed, use Section VIII, Division
Class 150, ASME B16.24 Class 150, ASME/ 1). If the material is not listed in either of these
ANSI B16.42 Class 150, orANSI/ AWWA Code sections then the allowable stress shall be
C-207. Figure ? ting options. determined using the method of Appendix ? III. For cast materials use the appro-
4.3 Flangeless (Wafer Type) ? priate casting qualityfactor from UG-24of
1 compatible foruse with flanges to ASME/ANSI ? r>B16.i Class 25 or 125, "ASMEIANS'IB16.5
Class 150, ASME B16.24 Class 150, ASME/ 5.1.1.3 As an alternative to 5.1. ?
ANSI B16.42 Class 150, orANSI/AWWA do not conform to the applicable requirements
C-207. Figure ? ting options. ? 16.34 shall have the maxi- I
mum allowable pressure determined using a
4.4 Grooved Ends ? conform proof test in accordance with UG-101 of ASME
to ANSI/AWWA C406. Section VIII.
5.1.2 Bronze and BronzeAlloy Valves
4.5 Shouldered Ends ? con-
form to ANSliAWWA C-606.
5.1.2. ? form to the applicable
5. DESIGNREQUIREMENTS ? ASME B16.24 shall have body I
pressure-temperature ratings in accordance with
to
5.1 Wall Thickness ? irements that standard. Forvalves that do not conform
of this section apply only to the valve body. The ? requirements of ASME B16.24, I
disc and shaft are specifically excluded. 5.1.2.2 or 5.1.2.3 shall be used to determine the
minimum required wall thickness.
5.1.1 Steel, NickelAlloy and other Special
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MSS STANDARD PRACTICE SP-67
5.1.2.2Valves thatdo not conform to the orANSI/AWWA C504 shall have the mini-
applicable requirements of ASME B16.24 shall ? ess determined using methods
have theminimum wall thickness determined that result in designs that are asconservative as
using methods that result in designs that are as those used in these standards. Reference Annex
conservative as those used in that standard. ? B16.42. I
5.1.2.3 As an alternative to 5.1.2.2, valves that 5.1.4.3 As an alternative to 5.1.4.2, valves that
do not conform to the applicable requirements do not conform to the applicable requirements
of ASME B16.24 shall have the maximumallow- ? B16.42 orANSI/AWWA I
able pressure determined using ? 504 shall have the maximum allowable pres-
accordance with UG-IO1 of ASME Section VIII. sure determined using ? ccordance
with UCD-101 of ASME Section VIII.
5.1.3 CastIron Valves
5.1.5Reduced Body Wall Thickness
5.1.3.1Valves thatconform to theapplicable
requirements of ASME/ ANSI B161 or ANSI/ ? material thickness between
AWWA C504 shall conform to the body pres- the shaft bore in thebody and adjacentbolt
sure-temperaturerequirements in accordance holes shall not be less than 25% of the required
with the respective standard. For valves which wall thickness of the body neck.
do not conform to the applicable requirements
of ASME/ANSI B16.1 or ANSI/AWWA ? kness ? her than
C504, Sections 5.1.3.2 or 5.1.3.3 shall be used to those listed in the flange standards in Section 2
determine the minimumrequired wall thickness. are used for flanged end valves, the minimum
flange thickness shall bedetermined using
5.1.3.2Valves thatdo not conform to the methods thatare asconservative as those used in
applicable requirementsof ASME/ ANSIB16.1 ? ropriate for the material of
or ANSI/ AWWA C504 shall have the mini- construction. Inno case shall the minimum
mum wall thickness determined using methods flange thickness beless than that listedin the
that result in designs that are asconservative as standard forthe flange rating under consideration.
those used in these standards.
5.3 Pressure Rating ? esigned
5.1.3.3 As an alternative to 5.1.3.2, valves that for shut-off pressure rating or differential pres-
do not conform to the applicable requirements sures lower than the body pressure rating. This
of ASME/ANSI B16.1 or ANSI/AWWAC504 ? shall be so marked in accordance
shall have themaximum allowable pressure with Section 12 of this Standard Practice.
determined using ? ccordance with Flange ratings otherthan those listedin the
UCI-101 of ASME Section VIII. flange standards in Section2 are outside the
scope of this Standard Practice.
5.1.4 Ductile Iron Valves
5.4 Flange Bolting
5.1.4.1Valves thatconform to the applicable
requirements of ASME/ ANSIB16.42 or ANSI/ ? ductile iron and non-ferrous
AWWA C504 shall conform to the body pres- valves with threaded body flange bolt holes shall
sure-temperaturerequirements in accordance have these holes drilled and tapped in accord-
with the respective standard. For valves which ? l.1 Coarse Thread Series I
do not conform to the applicable requirements Class 2B.
of ASME/ ANSI B16.42 or ANSI/ AWWA I
C504, Sections 5.1.4.2 or 5.1.4.3 shall be used to 5.4.2 Steel valves, all classes, with threaded
determine the minimumrequired wall thickness. body flange bolt holes intended for usewith
alloy steel bolting shall be drilled and tapped in I
5.1.4.2Valves thatdo not conform to the ? ASME B1.l CoarseThread I
I applicable requirements of ASME/ANSI B16.42 ? forbolts 1" and smaller andCOPYRIGHT Manufacturers Standardization Society of the Valve and Fittings
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MSS STANDARD PRACTICE SPd7
shall be tapped to the8 Thread Series Class 2B 8.3 Single Flange (Lug Type) Valves ? lts 1-1 ? ger. to-Face dimensions and tolerances for single
flange valves are listed in Table 3. Figures IA
5.4.3 Steelvalves limited by use of organic and 1B illustrate valveswith integral seals or
materials of construction to service tempera- gaskets. Figure ? alves that require
tures below 500°F (26OOC) where carbon steel separate gaskets.
bolting can be used, may be tapped in accord-
I ance with ASME BI. ? eries 2B ? Valves ? ve
for all bolt sizes. configuration is shown in Figure 5.
8.5 Shouldered End Valves ? br>6. VALVE DISCCLEARANCE valve configuration is shown in Figure 6.
6.1 Butterflyvalve discs may uponrotation
projectbeyond the body flangefaces, and there- 9. ACTUATORS
fore, caution should be exercised by the user to
insure there is no interferencebetween the 9.1 Actuators usedwith these valves shall be
butterfly valvedisc and adjacent components, self locking or have provisions to prevent un-
such as lined piping, strainers, check valves, and wanted disc movement during normal operating
other valving. Also mating pipe flanges must be conditions.
aligned prior to tightening of flange bolts.
9.2 Many factors such as flow media, operating
6.2All valves shall be designed for suitable pressures,fluid velocities and location in the
clearance according to the pipe inside diameters pipe line affect the operating torqueof the valve.
shown in Table 1, and in accordance with Annex These conditions must beconsidered when
A and Figure 7. sizing the actuator. See MSS SP-91 for guide-
lines in selecting manual actuators.
7. TRIM
Trim materials shall be suitable for the service 10. PURCHASINGINFORMATION
conditions and shall be at the manufacturer's
option unless specified. Trim shall be defined as In order to enable the manufacturer to properly
comprising shafts, bushings, body seating sur- supply valves for the application, the purchaser
faces,discs or disc seating surfaces, internal shall furnish the following information:
keys, pins, and screws in contact with the line a) Standard to beused.
fluid. Seats in the body and on the disc may be
separate or integral. Seat facings may be applied b)Size of valve.
to bodies and/or discs. c) Type of valve (see Section 1).
d) Type of end connection (see Section 4).
8. FACE-TO-FACE DIMENSIONS If flanged end, specify narrow or wide from
Table 2.
8.1 FlangedEnd Valves ? singleflanged (lug type) or flangeless
dimensions and tolerances for flanged end (wafer type), specify narrow, wide, or extra
valves are listed in Table 2. wide from Table 3.
e) Connecting pipe material (see Table 1).
8.2 Flangeless (Wafer Type) Valves ? dimensions and tolerances for flangeless f) Bodyline pressure.
valves are listed in Table 3. Figures 1A and ? valveswith integral seals or gaskets. g) Shut-off pressure (see Subsection 5.3).
Figure 1C illustrates valves that require separate h) Type and temperature ofline fluid to be
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i) Flow conditions: 11.2 Seat Test
1. For on-off service, maximum flow.
11.2.1 Type ? at is
2. For regulating service; maximum flow at furnished for tight shut-off service shall be tested
maximum pressure drop; minimum flow in the closed position to ? to at
at maximum pressure drop; maximum least the rated system pressure for the duration
flow at minimum pressure drop. specified below. The test shall be made with
water which may contain ? itor,
3. Whether valveis in closed system or
with kerosene, or other suitable liquid provided
subject to free discharge.
its viscosity is no greater than that of water. The
j) Type of actuator. manufacturer at his option may use air or inert
k) Method of operation: gas as the test medium. The test shall be con-
ducted in ? test the tightness of
1. Frequency the seat in the direction of flow as indicated on
2. OpeningTime the valve. For valves designed to close against
3. Closing Time pressure from either direction,the pressure shall
1) Formanual operation-Direction of closing. be applied across the valve disc in the direction
producing the most adverse seating condition.
m) Stem orientation (horizontal/ vertical, etc.). This test shall be made at ambient temperature
with the seats clean and free of oil, grease, or any
n) Buried or submerged service (if applicable).
sealant.
o) Allowable leakage for Type II valves(see
Subsection 11.2.2). If the test fluid is ? hall be no visible
evidence of drops or wetting through the disc
nor leakage past the seat. When air or inert gas
1 1. PRODUCTIONTESTING is the test medium, there shall be no visible
formation of bubbles when the closure is either
11.1 Shell Test ? alve shall coveredwith water or coated with ? ubjected to ? lar solution.
one and one half times the body design cold
working pressure for the duration specified. The The durationof the seat test shall be no less than:
test shall be made with water which may contain
a corrosioninhibitor, with kerosene, orother VALVE SIZE (NPS) TIME (SECONDS)
suitable liquid provided its viscosity is no greater 12 and Smaller 15
thanthat of water. Themanufacturer at his 14 ? mayuse airor inert gas as the test Larger than 24 60
medium. This shell test shall be conducted at
ambient temperature with the disc in the partially
11.2.2Type II Valves ? mit
open position. As an alternative, the body may seat leakage shall not be subjected to ? tested prior to assembly. No visible leakage unless specifiedby the purchaser. When so
through the bodywall shall be allowed. Leakage specified, valves shall be tested as agreed upon
throughthe shaft seal shall not be cause for by the purchaser and the manufacturer.
rejection.
11.3 Shaft Seal Test ? not be
The duration of the shell test shall be no less required to pass ? however the
than: manufacturer shall be able to demonstrate that
TIME (SECONDS) the shaft seal is capable of sealing at 1.1 times the
VALVE Fig.Fig. 1B 1A, lC, rated cold working pressure.
SIZE (NPS) -and ? and Smaller 15 15
295 -8 30 60
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12. MARKING differential shut-off pressureor and/ tempera-
ture is less than the body pressure and tempera-
Valves shall be markedas applicable in accord-ture rating, such limitationsmust be shown on
I ance with ASME/ANSI B16.34 or MSS SP-25 ? ecessary,this information may be
except that in the casewhere themaximum on an identification plate attached to the valve.
I TABLE 1. PIPE MINIMUMDIAMETERS FOR DISCCLEARANCE I
T Minimum Pipe Inside Diameters(d)
Unlined Ductile Iron Pipe
Nominal Unlined Unlined
Valve Gray Iron Steel Pipe r
Size(,) Pipe(b)(d) Minimum P1 Ire Special
Pressure Class ? r>Inches Inches mm Inches mm Inches mm Inches mm Inches mm
1% 1.61 40.9
2 2.07 52.6
2% 2.47 62.7
3 3.26 82.8 ? 6.4 3.40 86.4 3.28 83.3
4 3.26 102.6 4.03 102.4 4.24 107.7 4.24 107.7 4.10 104. I
5 5.05 128.3
6 6.08 154.4 6.07 154.2 6.34 161.0 6.34 161.0 6.16 156.5
8 8.1 ? 8.49 21 5.6 8.49 215.6 8.27 210.1
10 10.00 254.0 10.2 254.5 10.52 267.2 10.52 267.2 10.28 261.1
12 12.02 305.3 ? 58 ? .94 354.1 13.25 336.6 14.66 372.4 14.60 370.8 14.38 365.3
16 15.86 402.8 15.25 387.4 16.72 424.7 16.64 422.7 16.46 418.1
18 17.84 453.1 17.25 438.2 18.80 477.5 18.70 475.0 18.54 470.9
20 19.84 503.9 19.25 489.0 20.86 529.8 20.76 527.3 20.62 523.7
24 23.88 606.6 23.25 590.6 25 .O6 636.5 24.86 63 1.4 24.78 629.4
30 29.90 759.5 29.25 743.0 ? 786.4 30.92 785.4
36 35.90 91 1.9 35.25 895.4 37.48 952.0 37.12 942.8 37.08 941.8
42 41.90 1064.3 41.24 1047.5 43.62 1107.9 43.18 1096.8 43.14 1095.8
48 47.90 1216.7 47.25 1200.2 49.82 1265.4 49.34 1253.2 49.30 1252.2
54 53.90 1369.1 56.44 1433.6 55.88 1419.4 55.84 1418.3
60 59.90 1521.5 60.43 1534.9 59.85 1520.2
64 64.45 1637.0 63.83 1621.3
66 65.90 1673.9
72 ? a) For valve sizes not covered by pipe data in Table I, caution must be exercised as required in Section ? is no interference
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b) Diameters for thevalves sizes ? NPS were calculated fromTables6.4 and6.5 ofANSI A21.6(withdrawn in 1993) withallowance for
I the specified tolerances to get the smallest I.D. as follows: I
Size ? essclass 22 Size 10 NPS ? sclass 24Size 16 NPS ? sclass 26
8 NPS thicknessclass23 14 NPS thicknessclass 25
Diameters forvalve sizes30 NPS through60 NPS are calculated from ANSIA21.2 with allowances for thespecified tolerances to get the smallest
I.D. Diameters forvalves sizes 66 NPS through 72 NPS areextrapolated based on theconsistency of size 30 NPS and larger.
c) Diameters are calculated subtracting twice the nominal wall thickness from the outside diameter as specified for standard pipe in Table ? B36.10M.
d) Pipe dimensional data in TableI is for unlkdpipe. Themajority of Gray IronA21.6 and Ductile Iron PipeANSliAWWA C151 /A21.51 include
a cement mortar lining. For valve installationswith lined pipelines,caution mustbe exercised as required inSection 6to insure thereis no interference
between the piping and thevalve disc.
e) Ductile iron pipe diameters are calculated by subtracting the ANSIiAWWA C151/A21.51 negative OD tolerance and twice the nominal wall
thickness from the nominal OD.
r) The minimum nominal wall thickness of ductile iron pipe flanged in accordance with ANSI/ AWWA C115/A21.15, Standard for Flanged
DuctileIron Pipe with Threaded Hanges,is Special Class 53 for 3-54 inch nominal pipe sizesand PressureClass 350 for 60 and 64 inch pipe sizes.
g) 64inchductileironpipeflangedinaccordancewithANSI/AWWAC115/A21.15have66inchNPSflanges.Ifa66inchNPSbutterflyvalveisused
with this pipe, careful considerationshould be given to disc clearance.
h) Ductile iron pipe are available in classes other than those listed in Table 1. When using other classes, consult the valve/pipe manufacturers for
clearance requirements.
TABLE 2. FACE-TO-FACE DIMENSIONS-FLANGED END VALVES
Narrow Wide
Nominal TOLERANCE
Valve ? ce- -Face ? in. mm
1% ? 27 .O
4 ? br>5 ? 190.5
6 ? 2
.o0 ”
8 6.00 152.4 8.50 215.9
10 8.00 203.2 15.00 381 .O
12 8.00 203.2 15.00 381 .O
14 8.00 203.2 16.00 406.4
16 8.00 203.2 16.00 406.4
18 ? 406.4 k0.13
20 ? 457.2
24 ? 457.2
30 12.00 304.8 22.00 558.8 1
36 12.00 304.8 22.00 558.8
42 12.00 304.8 24.00 609.6 L
48 15.00 381 .O 26.00 660.4
54 15.00 38 1.O 28 .O0 71 1.2
60 15.00 381 .O 30.00 762.0
66 18.00 457.2 34.00 863.6
72 18.00 457.2 36.00 914.4
7 I
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TABLE 3. FACE-TO-FACE DIMENSIONS. SINGLE FLANGE AND FLANGELESS VALVES
T Face-to-Face of Valve Installed (See Figure 1A, 1B, 1C) 1
Nominal W- ? Narrow Body Wide Body Extra Wide Body Tolerance
Size ? mm in. mm
1% 1.31 33.3 1.44 36.6 1.50 38.1
2 1.69 42.9 1.75 44.5 1.81 46.0
1.81 46.0 1.94 49.3 2.00 50.8
2% ? ? 00 50.8 ? 52.3 2.19 55.6 2.25 57.2
5 2.19 55.6 2.50 63.5 2.56 65 .O
I
6 2.19 55.6 2.75 69.9 2.8 ? quot; -."
8 2.38 ? 94 74.7
10 2.69 76.2 3.12 79.2
I 68.3 ? 12 3.06 ? 3.38 85.9 4
I
14 ? 1.9 3.75 95.3 l
16 3.12 79.2 4.00 101.6 4.12 104.6 -+ .13 ? 101.6 4.50 114.3 4.62 117.3 tI
20 4.38 111.2 ? 130.0
24 6.06 153.9 6.19 157.2
30 6.50 165.1
36 ? 42 9.88 25 ? 3
48 10.88 276.4 t
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TABLE 4. END TO END DIMENSIONS, GROOVED END VALVES
Nominal End-to-End Tolerance
Valve
Size in. mm in. mm
1% 3.38 85.9
2 3.19 87 .o
2% 3.8 ? 5
T0.6
3 3.8 ? 25 133.4
IO 6.25 158.8
12 6.50 165.1
14 7.00 177.8 ? 16 ? 18 8.00 203.2
20 8.50 215.9
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f
FIGURE 1A
FIGURE1. FACE-TO-FACE,FLANGELESS AND SINGLE FLANGEVALVES
10
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FIGURE 2. FLANGED ENDS,BOLTING OPTIONS
i I, I
"I "I I" I
FIGURE 3. SINGLE FLANGED,BOLTING OPTIONS
J
FIGURE 4. FLANGELESS, BOLTINGOPTICNS
11
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MSS SP-b795 ? 504
MSS SP-67 STANDARD PRACTICE
LEND TO END
FIGURE 5. END TO END, GROOVEDEND VALVES
FIGURE 6. SHOULDERED END VALVES
12
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NSS SP-67 95 ? 440
MSS STANDARD PRACTICE SP-67
-W-
Minimum
Face-to-face of
valve installed
PIPE
A
- Chord
I
of d
Disc Pipe
I.D.
i
D
MAX. ? DISC TO PIPE MINIMUM CLEARANCETYPICAL CONCENTRIC TYPE CONSTRUCTION
13
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flSS SP-67 95 5770640 0500468 387
MSS STANDARD PRACTICE SP-67
ANNEX A
DISC TO PIPE CLEARANCE
In accordance with paragraph 6.2 of this Standard Practice, butterfly valves shall be designed to have clearance with the
inside diameters of adjacent pipe. Generally this consideration is most important with valves having single flange-lug type,
flangeless-span or wafer type bodies where the face-to-face dimension of the valve body is relatively short.
Minimum clearances are shown in Table Al of this annex.
The following equations illustrate how to calculate the clearance between ? valve and adjacent pipe. See
Figure A1.
Where:
a ? full open position as de %erminedby irltersection of ? heinstalled face of the valve
body, in. (mm).
c ? clearance withpipe when perfectly centered withvalve (See Table AI below), in. (mm).
d ? of connecting pipe (Reference ? mm).
D ? ameter, in. (mm).
W ? edface-to-face, in. (mm).
Notes:
1. Above calculation assumes concentric location of disc in body. The design shall provide for the minimum radial
clearance, c, for eccentric constructions.
2. Larger discs may be used for designs that provide for alignmentof the pipe with the disc and it can be demonstrated
by worst case calculations that the pipe will not interfere with disc rotation.
3. See Figure ? ustration of concentric type construction.
TABLE Al. DISC TO PIPE MINIMUM CLEARANCES
~~ ~~~ ~~~ ~~ ~~ ~~~
Valve Size Minimum Clearance (c) with Valve
Perfectly Centered with Pipe 1
1%- ? m)
8 -20 0.12 in. (3.0 mm)
24 ? mm)
14
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MSS SP-67 75 5770640 05004b9 213
LIST OF MSS STANDARD PRACTICES
NUMBER
SP- 6-1990 Standard Finishesfor Contact Faces of Pipe Flangesand Connecting-End Flanges of Valvesand Fittings
SP-9-1992 Spot Facing for Bronze, Iron and Steel Flanges
SP-25-1993 Standard Marking System for Valves, Fittings, Flanges andUnions
SP-42-1990 (R 1995) Class 150 Corrosion Resistant Gate, Globe, Angle and Check Valveswith Flanged and Butt Weld End
SP-43-1991 SteelWrought Stainless Butt-welding Fittings 1
SP-44-1991 Steel Pipe Line Flanges
SP-45-1992 Bypass and Drain Connections
SP-51-1991 (R 1995) Class 150 LW Corrosion Resistant Cast Flanges and FlangedFittings
SP-53-1995 Quality Standard for Steel Castings andForgings for Valves, Flanges, and Fittings and Other Piping
Components ? le Examination Method
SP-54-1995 Quality Standard for Steel Castingsfor Valves, Flanges, and Fittings and Other Piping Components -
Radiographic Examination Method
SP-55-1985 (R 1990) Quality Standard for Steel Castings for Valves, Flanges and Fittings and Other Piping Components -
Visual Method
SP-58-1993 Pipe Hangers andSupports ? gn andManufacture
SP-60-1991 Connecting Flange Joint Between Tapping Sleeves and Tapping Valves
SP-61-1992 Pressure Testing of Steel Valves
SP-65-1994 High Pressure Chemical Industry Flanges and ThreadedStubs for Use with Lens Gaskets
SP-67-1995 Butterfly Valves
SP-68-1988 High Pressure-Offset Seat Butterfly Valves
SP-69-1991 Pipe Hangersand Supports ? pplication
SP-70-1990 Cast Iron Gate Valves, Flanged and Threaded Ends
SP-71-1990 Cast Iron Swing Check Valves, Flanged and Threaded Ends
SP-72-1992 Ball Valves with Flanged or Butt-welding Ends for General Service
SP-73-1991 Brazing Joints for Wrought and Cast Copper Alloy Solder Joint Pressure Fittings
SP-75-1993 Specifications for High Test Wrought Butt Welding Fittings
SP-77-1984 (R 1990) Guidelines for Pipe Support Contractual Relationships
SP-78-1987 (R 1992) Cast Iron Plug Valves, Flanged and Threaded Ends
SP-79-1992 Socket-Welding Reducer Inserts
SP-80-1987 Bronze Gate, Globe, Angle and Check Valves
SP-81-1981 (R 1986,91) Stainless Steel, Bonnetless, FlangedKnife Gate Valves
SP-82-1992 Valve Pressure Testing Methods
SP-83-1995 Steel Pipe Unions, Socket-Welding and Threaded
SP-84-1990 Valves ? and Threaded Ends
SP-85-1994 Cast Iron Globe ? langed and Threaded Ends
SP-86-1987 (R 1992) Guidelines for Metric Data in Standards for Valves, Flanges, Fittings and Actuators
SP-87-1991 Factory-Made Butt-welding Fittings for Class ? Applications
SP-88-1993 Diaphragm TypeValves
SP-89-1991 Pipe Hangers andSupports ? Installation Practices
SP-90-1986 (R 1991) Guidelines on Terminology for Pipe Hangers andSupports
SP-91-1992 Guidelines for Manual Operation of Valves
SP-92-1987 (R 1992) MSS Valve User Guide
SP-93-1987 (R 1992) Quality Standard for Steel Castings andForgings for Valves, Flanges, andFittings and Other Piping
Components ? Examination-Method
SP-94-1992 Quality Standard for Ferritic and Martensitic Steel Castingsfor Valves, Flanges, and Fittings and Other
Piping Components ? ination Method
SP-95-1986 (R 1991) Swage(d) Nipples and Bull Plugs
SP-96-1991 Guidelines on Terminology for Valves and Fittings
SP-97-1995 Integrally Reinforced Forged Branch Outlet Fittings -Socket Welding, Threadedand Buttwelding Ends
SP-98-1992 Protective Coatings for the Interior of Valves and Hydrants
SP-99-1994 Instrument Valves
SP-100-1988 Qualification Requirements for Elastomer Diaphragmsfor Nuclear Service DiaphragmType Valves
SP-1 O1 -1 989 Part-Turn Valve Actuator Attachment ? ing Component Dimensions and Performance
Characteristics
SP-102-1989 Multi-Turn Valve Actuator Attachment ? ng Component Dimensions and Performance
Characteristics
SP-103-1995 Wrought Copper and Copper Alloy Insert Fittings for Polybutylene Systems
SP-104-1995 Wrought Copper' Solder Joint Pressure Fittings
SP-105-1990 Instrument Valves for Code Applications
SP-106-1990 Cast Copper Alloy Flanges and FlangedFittings, Class 125, 150 and 300
SP-107-1991 Transition Union Fittings for Joining Metal and PlasticProducts
SP-108-1991 Resilient Seated-Eccentric CastIron Plug Valves
SP-109-1991 Welded Fabricated Copper SolderJoint Pressure Fittings
SP-110-1992 Ball Valves Threaded, Socket-Welding, SolderJoint, Grooved and Flared Ends
SP-111-1992 Gray-Iron and Ductile-Iron Tapping Sleeves
SP-112-1993 Quality Standard for Evaluation of CastSurface Finishes ? ile Method. This SP must be
sold with ? e-dimensionalCast Surface Comparator,which is ? of the
Standard. Additional comparators may be sold separately.
SP-113-1994 Connecting Joint between Tapping Machines andTapping Valves
R-Year ? rd year reaflirmedsubstantive without change. Prices available upon request.
A large number of formerMSS Practices have been approved by the ANS! or ANS! Standards,published by others. in order to maintaina single source ofauthorltativo
information, the MSS withdraws its Standard Practices in such cases.
MANUFACTURERS STANDARIZATION SOCIETY OF THE VALVE AND FITTINGS INDUSTRY, INC.
S TRE ET, N.E. VIENNA, N.E.127 PARK STREET, VIRGINIA 22180
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