Condensate and Boiler Feed Pump Sizing
1. Determine heating load: BTU/hr. or Boiler H.P. or Lbs./hr. : ____________
2. Convert heating load from Step 1 to GPM (actual)
If BTU/hr is known: _________ Btu/hr ÷ 33,475 = ___________ BHP
If BHP is known: _________ BHP x 34.5 = ___________ Lbs./hr
If Lbs./hr is known: ___________ Lbs./hr ÷ 500 = ________ GPM (actual)
3. Determine pump capacity:
GPM (actual) from Step 2: ________ GPM x 3.0 factor = _________ GPM (pump capacity)
4. Determine pump discharge pressure. Add the following (3) factors to obtain total pump head.
‐ Static lift in feet (discharge piping) = _________ ft. of head
‐ Pipe friction loss in feet = _________ ft. of head
‐ Pressure in vessel that pump is pumping to (PSI x 2.31) = _________ Total ft. of head
‐ Total ft. of head: __________ ÷ 2.31 = __________ PSI (pump discharge pressure)
5. Determine Receiver Size
Condensate
1 minute x GPM from Step 3: _________ Gallons
Boiler Feed
1 BHP = 1 Gallon receiver gross capacity: __________ Gallons
Condensate and Boiler Feed Unit Selection
☐ Simplex ☐ Duplex ☐ Triplex ☐ Quadruplex
☐ Boiler Feed Unit ☐ Condensate Return Unit
Pump Capacity: _________ GPM @ __________ PSI
HP: ________ Voltage/Phase: __________ RPM: ________
Motor Enclosure:
☐ Open Drip Proof ☐ TEFC ☐ Wash Down Duty ☐ Explosion‐Proof
Tank Capacity: __________ Gallons
☐ Steel ☐ Stainless Steel ☐ Cast Iron
Condensate Temperature: ☐ < 200°F ☐ < 210°F ☐ 212°F (elevated)
NOTE:
*Condensate standard feature: NEMA 1 float switch
*Boiler Feed standard features: Gauge glass and Sterlco Make‐up Water Valve
Special Features:
Float Switch ☐ NEMA 1 ☐ NEMA 4 ☐ NEMA 7 & 9
Mechanical Alternator ☐ NEMA 1 ☐ NEMA 4 ☐ NEMA 7 & 9
Two Level Non Alternating Float Switch ☐ NEMA 1 ☐ NEMA 4 ☐ NEMA 7 & 9
Make Up Water Valves
☐ Sterlco Make‐Up Water Valve ☐ Solenoid Make‐Up Water Valve
☐ Solenoid Make‐Up Water Valve w/ 3 Valve By‐pass ☐ McDonnell + Miller 21
Accessories
☐ Gauge Glass ☐ Discharge Gate Valve ☐ Inlet Y Strainer (cast iron)
☐ Stainless Steel Gauge Glass ☐ Discharge Balancing Valve ☐ Inlet Basket Strainer (cast iron)
☐ Dial Thermometer ☐ Isolation Valve ☐ Steam Preheat tube (stainless steel)
☐ Discharge Pressure Gauge ☐ Magnesium Anode ☐ Steam Temperature Control Valve
☐ Discharge Check Valve ☐ Lifting Eye Bolts ☐ Other: ______________________
Control Panel Features: (Basic panel includes: motor circuit protector, HOA selector switch, external reset, control circuit transformer, pilot light (pump running), removable mounting plate and terminal strip with a single point power connection.)
NEMA Enclosure: ☐ NEMA 12 ☐ NEMA 4 ☐ NEMA 4X ☐ NEMA 3R
Special Features:
☐ High Level Alarm ☐ Test Push Button ☐ Lead/Lag Selector Switch ☐ Main Disconnect Switch
☐ Low Level Alarm ☐ Power ON Pilot Light ☐ UL Certification ☐ Remote Mounted
☐ Low Water Cutoff ☐ Pump Run Verification ☐ CUL Certification ☐ Other: ______________
☐ Pump Fail Alarm ☐ Pump Run Timer ☐ Dry Contacts
☐ Pump Fail Transfer ☐ Electric Alternator ☐ Sealtight Conduit
NOTE: On a duplex condensate unit, when using an electric
alternator, you must also add a two level non‐alternating float switch