Cast Iron P/T Ratings
D100072X012
Pressure/Temperature Ratings
for Fisherr Cast Iron Valve Bodies
Product Bulletin
59.1:015
December 2012
The pressure/temperature ratings for flanged cast iron
valves given in the following figure are in accordance
with ASME B16.1. Fisher valves with Class B ratings are
listed in table 1. Cast iron valves with screwed
connections have CL250 ratings in accordance with
ASME B16.4.
Information in the following figure has been extracted
from Cast Iron Pipe Flanges and Flanged Fittings (ASME
B16.1) with the permission of the publisher.
TEMPERATURE, _C
CL250 RATINGS
CLASS B (NPS 1-12)
CLASS A (NPS 1-12)
CLASS B (NPS 14-24)
SATURATED
STEAM
The American Society of Mechanical Engineers, United
Engineering Center, Three Park Avenue, New York,
New York 10016.
Table 1. Class B Ratings
Valve Body
Design
(1)
E
YD, YS 1, 1-1/2, 2, 2-1/2, 3, 4, 6 X X
1. Refers to all valve designs beginning with “E” that are available in cast iron, for
example: ED, EDR, etc.
Valve Size, NPS CL125B CL250B
1, 1-1/2,2, 2-1/2, 3, 4, 6, 8 X X
CLASS B (NPS 1-12)
CLASS A (NPS 1-12)
CLASS B (NPS 14-24)
A2371-2
www.Fisher.com
CL125 RATINGS
TEMPERATURE, _F
Pressure/Temperature Ratings
Product Bulletin
59.1:015
December 2012
Cast Iron P/T Ratings
D100072X012
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E 1989, 2012 Fisher ControlsInternational LLC. All rights reserved.
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