Table 25. Pressure Loss of Liquid Refrigerants in Liquid Line Risers (Expressed in Pressure Drop, PSIG, and Subcooling Loss, ˚F).

 

 

 

 

 

 

 

 

 

Liquid Line Rise in Feet

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10'

 

15'

 

20'

 

25'

 

30'

 

40'

 

50'

 

75'

 

100'

 

Refrigerant

PSIG

˚F

PSIG

 

˚F

PSIG

 

˚F

PSIG

 

˚F

PSIG

 

˚F

PSIG

 

˚F

PSIG

 

˚F

PSIG

 

˚F

PSIG

˚F

R-22

4.8

1.6

7.3

 

2.3

9.7

 

3.1

12.1

 

3.8

14.5

 

4.7

19.4

 

6.2

24.2

 

8.0

36.3

 

12.1

48.4

16.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R-134a

4.9

2.0

7.4

 

2.9

9.8

 

4.1

12.3

 

5.2

14.7

 

6.3

19.7

 

8.8

24.6

 

11.0

36.8

 

17.0

49.1

23.7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R-507, R-404A

4.1

1.1

6.1

 

1.6

8.2

 

2.1

10.2

 

2.7

12.2

 

3.3

16.3

 

4.1

20.4

 

5.6

30.6

 

8.3

40.8

11.8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Based on 110˚F liquid temperature at bottom of riser.

Table 26. Equivalent Feet of Pipe Due to Valve and Fitting Friction

Copper Tube, O.D., Type “L”

1/2

5/8

7/8

1 1/8

1 3/8

1 5/8

2 1/8

2 5/8

3 1/8

3 5/8

4 1/8

5 1/8

6 1/8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Globe Valve (Open)

14

16

22

28

36

42

57

69

83

99

118

138

168

Angle Valve (Open)

7

9

12

15

18

21

28

34

42

49

57

70

83

90˚ Turn Through Tee

3

4

5

6

8

9

12

14

17

20

22

28

34

Tee (Straight Through)

 

 

 

 

 

 

 

 

 

 

 

 

 

or Sweep Below

.75

1

1.5

2

2.5

3

3.5

4

5

6

7

9

11

90˚ Elbow or Reducing

 

 

 

 

 

 

 

 

 

 

 

 

 

Tee (Straight Through)

1

2

2

3

4

4

5

7

8

10

12

14

16

 

 

 

 

 

 

 

 

 

 

 

 

 

 

31

Page 31
Image 31
Heatcraft Refrigeration Products H-ENGM0408, H-ENGM0806 manual Equivalent Feet of Pipe Due to Valve and Fitting Friction

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