Utica Boilers SSV 安装指导

(This boiler must be piped with a primary loop)

These charts are valid for piping diagrams on pages 17 & 18
Instructions:

Pipe diameter determines pump size. Smaller the diameter of pipe, larger the pump. 150/200 Mbh boilers can be 

piped in 3/4" , 1" or 1¼" pipe. Use charts 1-4 to determine pipe size and respective pump size.

Fill in chart using the 1" section first. Then consult chart 4 for pump selection. 

Pump size may be decreased by decreasing equivalent length of pipe. Use larger diameter pipe as primary loop to 

decrease equivalent length. Use charts 2 or 3.

Note: The figures below are based on industry average. Consult valve/fitting manufaturer for exact equivalent length or 

for fittings not shown below.

1"

90° Elbow

2.5

45° Elbow

1.3

Tee-branch

5.0

Tee-through

1.7

Swing check valve

8.3

Lift check valve

50.0

Enter Total 1" straight pipe length in feet

Add  up  numbers  in  column  C                                                    

Total equivalent length of Primary

Pump Factor

1¼"                              

(Any pipe/fitting 

larger than 1¼",    

count as 1¼")

90° Elbow

3.1

45° Elbow

1.7

Tee-branch

6.3

Tee-through

2.1

Swing check valve

10.4

Lift check valve

62.5

Enter Total 1¼" straight pipe length in feet

Add  up  numbers  in  column  C                                                             

Total equivalent length of Primary

Multiply Total of Column C in Chart 2 by 0.35

Pump Factor