# Debco Equipment is now Associated Equipment Sales

## 314-652-2562 - https://www.aeskc.com

### 1732C Westpark Center Dr, Fenton MO 63026

Boiler Formulas

Common Conversion Factors

Boiler HP x 34.5
Boiler HP x .069
Boiler HP x 33.4
Boiler HP x 139
BTU/Hour Output ÷ 240
EDR/1000 x 0.5
Lbs of Steam /Hr ÷ 500

= Lbs. of Steam per Hour
= Evaporation Rate Gallons per Minute (GPM)
= MBTU per Hour Output (MBH)
= Sq. Feet of Equivalent Direct Radiation (EDR)
= Sq. Feet of Equivalent Direct Radiation (EDR)
= Evaporation Rate Gallons per Minute (GPM)
= Evaporation Rate Gallons per Minute (GPM)

Condensate Pump Sizing

Evaporation Rate x
Pump GPM x

= Pump GPM Required
= Receiver Tank Size (Gallons Storage)
 Example:  2,400,000 output boiler ÷ 240  10,000 EDR ÷ 1000 ÷ 2  5 GPM x 3  15 GPM x 1 = 10,000 EDR  = 5 GPM  = 15 GPM pump capacity  = 15 gallon tank

Boiler Feed Unit Sizing

Evaporation Rate x 1.85
Evaporation Rate x 20

Rule of Thumb:
= Pump GPM Required
= Receiver Tank Size (Gallon Storage @ 20 minutes)
Use one gallon of storage per boiler horsepower.
 Example: 3,347,900 output boiler ÷ 33,479  100 BHP x .069  6.9 GPM x 1.85  6.9 GPM x 20 = 100 BHP = 6.9 GPM = 12.7 Pump GPM Req. = 138 Gallons Storage

Determining Existing Tank Capacity

 Square Tank Volume Round Tank Volume =  H" x W" x L" ÷ 231 =  R" x R" x 3.141 x L" ÷ 231 = Gallons Capacity = Gallons Capacity

H is height, W is width, L is length, R is radius

Circulation Pump Sizing

BTU
GPM
^

=    500 x GPM x ^T
=    BTU ÷ 500 x ^T
=    BTU ÷ 500 x GPM
^T is the change in temperature

DEBCO EQUIPMENT COMPANY  º 1814 South Third St.  º  St. Louis, MO  63104