ASTM F1098-87(1998)

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An American National Standard
Designation: F 1098 – 87 (Reapproved 1998)
Standard Specification for
Envelope Dimensions for Butterfly Valves—NPS 2 to 24
This standard is issued under the fixed designation F 1098; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
TABLE 1 Face-to-Face Dimensions
1. Scope
1.1 This specification provides standard dimensions for
Conventional, ANSI B16.34,
Valve Size,
manual (lever and gear actuator) butterfly valves installed in
200 psig, 150 Class,
NPS
in. (mm) in. (mm)
shipboard piping systems in NPS 2 to NPS 24, inclusive.
5 3
21 ⁄8 (41) 1 ⁄4 (44)
1.2 This specification covers conventional and ANSI
3 7
2½ 1 ⁄4 (44) 1 ⁄8 (48)
B16.34 class butterfly valves of both lug and wafer types.
3 7
31 ⁄4 (44) 1 ⁄8 (48)
1.3 The values stated in inch-pound units are to be regarded 15
3½ 1 ⁄16 (49) 2 (51)
4 2 (51) 2 ⁄8 (54)
as the standard. The values given in parentheses are for
52 ⁄16 (52) 2¼ (57)
information only.
62 ⁄8 (54) 2¼ (57)
82 ⁄16 (62) 2½ (64)
2. Referenced Documents 9 13
10 2 ⁄16 (65) 2 ⁄16 (71)
12 3 (76) 3 ⁄16 (81)
2.1 ANSI Standard:
11 5
14 3 ⁄16 (93) 3 ⁄8 (92)
B 16.34 Small Butt Welding End Valves 1
16 4 ⁄16 (103) 4 (102)
18 4 ⁄16 (116) 4½ (114)
20 5 ⁄16 (128) 5 (127)
3. Dimensions
7 1
24 5 ⁄8 (149) 6 ⁄16 (154)
3.1 Face-to-Face Dimensions:
3.1.1 Valve body face-to-face dimensions are provided in
Table 1.
3.2.1 The maximum permissible dimensions for lever- and
3.1.2 The face-to-face dimensions are the metal-to-metal
gear-type actuators are provided in Fig. 1.
dimensions between the valve body flange faces that require
3.2.2 The handwheel and handle may be on either side of
separate gaskets or the compressed or installed condition for
the valve.
valves using liners that extend from the body contact faces and
3.2.3 All handwheels and handles rotate clockwise to close
act as flange gaskets.
the valve.
3.2 Actuator Dimensions:
4. Tolerances
4.1 Face-to-Face Dimensions—A plus or minus tolerance
1 1
of ⁄16 in. (1.6 mm) for all sizes shall be allowed (see Table 1).
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.
5. Keywords
Current edition approved Dec. 14, 1987
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