Heatcraft Refrigeration Products H-IM-72A User Manual download pdf (Page 24)

Table 17. Henry Relief Valve Capacity Ratings

Pounds of Air per Minute for all Refrigerants Except Ammonia R717

TYPE CATALOG SIZE CONNECTION STANDARD PRESSURE SETTINGS PSIG

NUMBER INLET OUTLET 350 400 425 450

ANGLE 526E 3/8 M.P.T. 3/8 FLARE 10.2 11.6 12.3 13.0

527E 1/2 M.P.T. 5/8 FLARE 28.5 32.4 34.4 36.3

5231 3/8 M.P.T. 3/8 FLARE 11.2 12.7 13.5 14.3

5231-A 3/8 M.P.T. 1/2 FLARE 18.6 21.1 22.4 23.7

STRAIGHT 5231 1/2 M.P.T. 5/8 FLARE 18.6 21.1 22.4 23.7

THROUGH 5232 1/2 M.P.T. 5/8 FLARE 28.1 32.0 33.9 35.8

5240-1/2 1/2 M.P.T. 3/4 F.P.T. 41.2 46.8 49.1 52.5

5242-3/4 3/4 M.P.T. 3/4 F.P.T. 41.2 46.8 49.1 52.5

5244-1 1 M.P.T. 1 F.P.T. 74.0 84.2 89.3 94.4

5246-1-1/4 1-1/4 M.P.T. 1-1/4 F.P.T. 129.7 147.5 156.4 165.4

Table 18. Discharge Piping Table

MAXIMUM LENGTH OF DISCHARGE PIPE IN FEET

* FOR 400 PSIG PRESSURE SETTING

RELIEF DEVICE

CAPACITY SOFT COPPER TUBE O.D. SCHEDULE 40 PIPE

LBS. AIR/MIN. 3/8” 1/2” 5/8” 1/2” 3/4” 1” 1

/4” 1

/2” 2”

10 3

/2 19

/4 61 108 445

12 2

/2 12

/4 44 75 308

14 2 9

/2 32 56 228

18 5

/4 19

/4 33 137

20 4

/4 16 28 110 371

25 2

/2 9

/2 18 72 238

30 2 7 12 49 165

35 2 5

/4 9 37 121

40 3

/2 7 28 93 366

50 2

/2 4 18 60 233

70 3 9 30 119 257

80 2 7 23 91 198

90 2 5 18 72 156

125 3 10 37 81 282

150 2 7 26 56 196

For Relief Devices set at 400 psig

• Obtain the capacity at 400 psig setting.

• Locate this capacity or the nearest larger capacity in the left-hand column of the discharge piping table above and read across to obtain the

maximum lengths for each tube and pipe size.

For relief devices set at 350 psig, use the above table and multiply by .75 to determine maximum lengths.

For relief devices set at 425 psig, use the above table and multiply by 1.15 to determine maximum lengths.

For relief devices set at 450 psig, use the above table and multiply by 1.25 to determine maximum lengths.

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Heatcraft Refrigeration Products H-IM-72A User Manual Page 24

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