Capacities | Wafer Valves
WAFER VALVE CAPACITIES scfh at 1"w.c. pressure drop (70°F air) and 0.25 PSIG, upstream pressure
1146, 1156
1136A
Pipe size
wide open
70°
wide open
70°
open
open
-6 (3") -7 (4")
18 500 27 200
9 650
9 500 18 500
4 940 9 650
14 300
-8 (6") -9 (8")
60 000 125 000 202 000 303 000 400 000 530 000 670 000 845 000 1 040 000 1 260 000 1 720 000
35 000 56 000 88 500 137 000 195 000 254 000 320 000 404 000 498 000 600 000 825 000
27 200 60 000 125 000 202 000
14 300 35 000 56 000 88 500
-10 (10") -12 (12")
-14 (14") -16 (16") -18 (18") -20 (20") -22 (22") -24 (24") -30 (30")
303 000
137 000
– – – – – –
– – – – – –
OBSOLETE - See Sheet 1146/1156-3 OBSOLETE - See Sheet 1146/1156-3
WAFER VALVE LEAK RATES All leak rates evaluated with valve in closed position, and 0.25 PSIG pressure upstream. 1136A/55/56 leak rates are evaluated at 70°F, those for 1145/1146 are at 250°F, while those for 1145/1146-H are at 700°F.
Pipe Size
1136A
1155/1156
1145/1146
1145/1146-H
-6 (3") -7 (4") -8 (6") -9 (8")
165 213
341 373 672 943 1159 1410
369 600
376 578
694
1300 2268 3460 5087 7005 9000 10961 13722 16913 20302 30210
1259 2202 3364 4940 6855 8735
791
-10 (10") -12 (12") -14 (14") -16 (16") -18 (18") -20 (20") -22 (22") -24 (24") -30 (30")
996 1224 1410
1929 2494 3337 3349 5276 5784 7245
— — — — — —
10688 13451 16431 19709 29339
OBSOLETE - See Sheet 1146/1156-3 OBSOLETE - See Sheet 1146/1156-3
SPECIFICATIONS / CONSTRUCTION
Valve
Maximum inlet pressure, psi
Maximum
Minimum ambient
designation
temperature, F temperature, F
Body
Disc
Shaft
1155/1156
25
250
-20
heat-resistant heat-resistant stainless steel
1136A
cast iron
cast iron
1145/1146
25 25
700
-20 -20
" "
" "
" "
1145/1146-H
1200
For 1146-H Valves, consider specifying "1232 B & L" (for additional charge) with standoff bracket to help protect control motor from heat.
WARNING: Situations dangerous to personnel and property may exist with the operation and maintenance of any combustion equipment. The presence of fuels, oxidants, hot and cold combustion products, hot surfaces, electrical power in control and ignition circuits, etc., are inherent with any combustion application. Components in combustion systems may exceed 160°F (71°C) surface temperatures and present hot surface contact hazard. Fives North American Combustion, Inc. suggests the use of combustion systems that are in compliance with all Safety Codes, Standards, Regulations and Directives; and care in operation.
Bulletin 1136A-1156 Page 3
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