Buying Guide
60
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AHEAD OF THE FLOW
®
Revised 7/20/2018
RATED
BOILER
HP
MAXIMUM
BOILER
CAPACITY
(LBS/HR)
OPERATING PRESSURE (PSIG)
10 50 75 100 125 150 175 200 225 250
100 3450 4" 3" 3" 2½" 2½" 2½" n/a n/a
125 4313 4" 3" 3" 3" 3" 2½" n/a n/a n/a n/a
150 5175 4" 4" 4" 3" 3" 3" n/a n/a n/a n/a
200 6900 6" 4" 4" 4" 4" 3" n/a n/a n/a n/a
250 8625 6" 4" 4" 4" 4" 4" 4" n/a n/a n/a
300 10350 6" 4" 4" 4" 4" 4" 4" 4" 4" 4"
350 12075 6" 6" 4" 4" 4" 4" 4" 4" 4" 4"
400 13800 8" 6" 6" 4" 4" 4" 4" 4" 4" 4"
500 17250 8" 6" 6" 6" 6" 4" 4" 4" 4" 4"
600 20700 8" 6" 6" 6" 6" 6" 4"
4" 4"
700 24150 8" 6" 6" 6" 6" 6" 6" 6" 6"
750 25875 8" 8" 6" 6" 6" 6" 6" 6" 6"
800 27600 8" 8" 8" 6" 6" 6" 6" 6" 6"
900 31050 8" 8" 8" 8" 6" 6" 6" 6" 6"
1000 34500 8" 8" 8" 8" 8" 6" 6" 6" 6"
1100 37950 8" 8" 8" 8" 8" 6" 6" 6"
1200 41400 8" 8" 8" 8" 8" 8" 6" 6"
1300 44850 8" 8" 8" 8" 8" 8" 8"
1400 48300 8" 8" 8" 8" 8" 8" 8"
1500 51750 8" 8" 8" 8" 8" 8"
1600 55200 8" 8" 8" 8" 8"
1800 62100 8" 8" 8" 8"
2000 69000 8" 8"
F-869 Automatic Stop Check Valve Sizing Guide
This chart assumes that the boiler will always run at maximum capacity (lbs/hr)
RATED
BOILER
HP
@ 90%
BOILER
CAPACITY
(LBS/HR)
OPERATING PRESSURE (PSIG)
10 50 75 100 125 150 175 200 225 250
100 3105 4" 3" 2½" 2½" 2½" 2½" n/a n/a
125 3881 4" 3" 3" 3" 2½" 2½" n/a n/a n/a n/a
150 4658 4" 3" 3" 3" 3" 3" n/a n/a n/a n/a
200 6210 4" 4" 4" 3" 3" 3" n/a n/a n/a n/a
250 7763 6" 4" 4" 4" 4" 3" n/a n/a n/a n/a
300 9315 6" 4" 4" 4" 4" 4" 4" n/a n/a n/a
350 10868 6" 6" 4" 4" 4" 4" 4" 4" 4" 4"
400 12420 6" 6" 4" 4" 4" 4" 4" 4" 4" 4"
500 15525 8" 6" 6" 4" 4" 4" 4" 4" 4" 4"
600 18630 8" 6" 6" 6" 6" 4" 4"
4" 4" 4"
700 21735 8" 6" 6" 6" 6" 6" 6" 4" 4"
750 23288 8" 6" 6" 6" 6" 6" 6" 6" 6"
800 24840 8" 8" 6" 6" 6" 6" 6" 6" 6"
900 27945 8" 8" 6" 6" 6" 6" 6" 6" 6"
1000 31050 8" 8" 8" 6" 6" 6" 6" 6" 6"
1100 34155 8" 8" 8" 8" 6" 6" 6" 6" 6"
1200 37260 8" 8" 8" 8" 6" 6" 6" 6"
1300 40365 8" 8" 8" 8" 8" 6" 6" 6"
1400 43470 8" 8" 8" 8" 8" 8" 6" 6"
1500 46575 8" 8" 8" 8" 8" 8" 8"
1600 49680 8" 8" 8" 8" 8" 8" 8"
1800 55890 8" 8" 8" 8" 8"
2000 62100 8" 8" 8" 8"
This chart assumes that the boiler will always run between 75% and 100% of maximum capacity (lbs/hr) and average an output of 90% of boiler capacity.
NOTES: 1. Automatic Stop Check Valve sizing must be sized only to the boiler steam demand, not the boiler nozzle outlet piping size.
2. Specific operating conditions may require slightly different Automatic Stop Check Valve sizing requirements for any given boiler system.
3. Automatic Stop Check Valve sizing is based on a target of 2 PSI pressure drop across the valve for optimum flow.
4. Please contact NIBCO Technical Services for guidance if operating conditions differ from conditions stated in #2 above.
5. This chart is to be used to assist in sizing Automatic Stop Check Valves, NIBCO assumes no liability for incorrect sizing.