Helpful Hints

BOILER RATINGS & PUMP CAPACITY REQUIRED

Equivalent
Boiler HP

BTU/hr.
1000's

Steam
Lb/per hr.

EDR
Rating
Sq. Ft.

Cond. Rate
GPM

Pump Cap.
Req.. GPM

20

670

690

2790

1.38

3.0

30

1005

1035

4185

2.07

6.0

40

1340

1380

5580

2.76

9.0

50

1675

1725

6975

3.45

9.0

60

2010

2070

8370

4.14

12.0

70

2345

2415

9765

4.83

15.0

80

2680

2760

11160

5.52

15.0

100

3350

3450

13950

6.90

22.5

125

4185

4313

17438

8.62

22.5

150

5025

5175

20935

10.40

30.0

200

6695

6900

27915

13.80

45.0

250

8370

8625

34895

17.30

45.0

300

10045

10350

41875

20.70

60.0

350

11720

12075

48825

24.20

75.0

400

13390

13800

55830

27.60

75.0

450

15064

15520

63000

31.10

97.5

500

16740

17250

69790

34.50

97.5

660

18411

18975

77000

37.95

120.0

600

20085

20700

83750

41.40

120.0

650

21759

22425

91000

44.85

150.0

700

23432

24150

98000

48.30

150.0

750

25106

25875

105000

51.75

150.0

800

26780

27600

112000

55.20

187.5

1000

33475

34500

140000

69.00

200.0



Note: Boiler HP x .069 GPM ot feed water required to maintain boiler water level at 100% load. Pumps should be selected to provide two to three times the condensate ratio shown in the above Table. Pump capacity listed in the Table are based on an approximate 3 to 1 ratio.


Sizing Receivers for Boiler Feed Pumps

Receiver capacity is determined by allowing 1 gal of gross capacity per boiler HP. Maximum working capacity recommended is 75% of gross capacity. General Service Administration specs.

Useful Conversion Data

1 Boiler HP = 34.5 Ibs. of water evaporated per hour from and at 212°F
1 Boiler HP = 33,475 BTUH or 970 BTUH per lb. of water.
1 Boiler HP = 140 Sq. Ft. EDR.
1 BTU is required to raise 1 lb. of water 1°F between 32°F and 212° F

ALIGNMENT PROCEDURE

Pump and motor on baseplate -- Motor to be aligned
It is assured that the baseplate has been set and grouted with pump fixed and with pump shaft level and pipe flanges properly positioned. Any pipe strain must be relieved. Final alignment should be made by shimming the driver (motor) only.
1. Remove Soft Foot of Motor
A. With all bolts loose, check with a feeler gage to see if shims must be added at any motor feet.
B. With necessary shims added, pull down bolts in all motor feet.
C. Loosen one bolt at a time and retighten, noting if any change is made in a dial indicator with button placed against motor shaft (usually a horizontal reading is best). Repeat this at all bolts. If loosening a bolt shows a change, add some shims at this point until an acceptable reading is obtained. Normally, .005" deflection is OK, but the less deflection will simplify the remaining work.
2. Give Motor Angular Alignment in Vertical Plane
A. Take a T.I.R. (Total Indicator Reading) top to bottom
Note: If motor is too low, (more than 1/8") complete step 3A only and then return to 2A.

B. Shim motor at front or back
"S" = Mils (T.I.R. x 2F)
2R
Where "S"= Shim total
"F"= Motor "F" dimension
Note: Maximum angular allowance is .004"
3. Raise or Lower Motor to Parallel Alignment in Vertical Plane
A. Add shims equally under all motor feet to approximately .050" reading with a straight edge.
B. Read T.I.R. (top to bottom) and add shims to all feet
"S"= T.I.R./2
Note: Maximum allowable parallel alignment is.004" T.I.R.
4. Shift Motor to Change Angular Alignment in Horizontal Plane

A. Take T.I.R. reading (side to side)
B. Loosen bolts, keep one bolt snug
C. Rotate motor around "snug bolt" until you have 1/2 original T.I.R. read in part "A" above
D. Tighten all bolts and check T.I.R. . Repeat A, B & C if necessary until tolerance is obtained.

5. Shift Motor Parallel Alignment in Horizontal Plane

A. Take T.I.R. (side to side) Loosen all bolts
B. Shift motor parallel 1/2 T.I.R.
C. Tighten bolts, check T.I.R. and repeat A & B if necessary until tolerance is obtained.


37 Williams S. Canning Blvd., Tiverton RI 02878
Phone : (888) 322-2926 | Fax: (401) 624-3373
sales@ipspump.com