Specifications | Butterfly Valves
STANDARD VALVES
(See also Bulletins 1122 [Manual], and 1154 [Resilient Seat Wafer])
1126 and 1123 Valves have a swing-through disc. 1122 manual valves and 1124 motorized valves have a beveled disc for reduced leakage; spring-loaded linkage is furnished with the 1124 when an electric operator is specified (see Instructions 1020). All standard valves (except 1126-_-H) can be used on natural gas. Standard 1122 , 1123, 1124, and 1126 Valves are suitable for air heated to 400°F. For 400 to 700°F, specify the 1122-_- H , or 1126-_-H Valve with Grafoil seal. The -H (Heated Air) is available in sizes 1" through 6" only.
1124 Motorized 1126 Motorized 1126 (H) Hot Air Motorized 1123 Manual
Standard butterfly valves have female pipe threads in ¾" through 6" pipe sizes; larger valves are flanged , as are 1126-F in 3", 4", and 6" sizes. Motorized valves can be ordered with bracket, motor arm, and linkage for standard control motor or actuator. 1123 Manual valves have a locking handle and are available in 8" to 16" sizes. 1122 manual valves have a locking handle and are available in ¾" to 6" sizes.
SPECIFICATIONS/CONSTRUCTION
Valve
Maximum inlet pressure, psi
Maximum
Minimum Ambient
designation 1122 , 1124 , 1126:
temperature, F
temperature, F
Body
Disc
Shaft
25
400
-20
cast iron threaded
steel
303 stainless
-0 thru -4 -5 thur -8
steel
15 15
400 400
-20 -20
"
" "
" "
-6-F thru -8-F
cast iron fl anged
1126 , 1123 -9 thru -16
5
400
-20
"
cast iron
416 stainless steel
Caution: Flanged Valves: Use flat flanges and full face gaskets when installing this equipment. Raised face flanges can damage the valve body. Additional Notes: 700°F for 1122-(H), and 1126-(H) which have Grafoil seals. See Bulletin 1122.
AIR TEMPERATURE CORRECTION FACTORS FOR ALL VALVES Multiply scfh in table by air temperature factor to get scfh air at that temperature.
F
factor
F
factor
60
1.0
300 400 500 600 700
0.83 0.78 0.74 0.70 0.67
100 150 200 250
0.96 0.92 0.89 0.86
Bulletin 1123/24/26 Page 3
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