Description
Part # | NB Cert. # | Body Material | Wt (lbs) | Size |
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801 | 51152 |
A36 Carbon Steel Black Oxide Coated |
3.2 | ½” MNPT inlet x ¾” FNPT outlet |
#801 safety relief valve can be mounted on the following manifolds:
- #843- ½” x ½” x ½” FNPT (hand wheel)
- #843F- ½” x ½” x ½” FNPT (seal cap)
- #846M- ½” x ½” x ½” FNPT (seal cap)
- #848M- ¾” x ½” x ½” FNPT (seal cap)

Design Features |
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801 Series Capacity ChartSlope = 0.73 SCFM/PSIAStandard Conditions [60 ˚F, 1 Atm] |
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Set Pressure (PSIG) | Air SCFM | Air lb/min | Air lb/hr | NH3 lb/min | NH3 lb/hr | R-22 lb/min | R-22 lb/hr | R-290 lb/min | R-290 lb/hr | R-404A lb/min | R-404A lb/hr |
75 | 71.0 | 5.4 | 324.8 | 4.2 | 249.1 | 9.4 | 561.2 | 6.7 | 400.8 | 9.9 | 596.2 |
100 | 91.0 | 6.9 | 416.7 | 5.3 | 319.5 | 12.0 | 720.0 | 8.6 | 514.2 | 12.7 | 764.9 |
125 | 111.1 | 8.5 | 508.6 | 6.5 | 390.0 | 14.6 | 878.8 | 10.5 | 627.6 | 15.6 | 933.6 |
150 | 131.2 | 10.0 | 600.5 | 7.7 | 460.4 | 17.3 | 1037.5 | 12.3 | 741.0 | 18.4 | 1102.3 |
175 | 151.3 | 11.5 | 692.4 | 8.8 | 530.9 | 19.9 | 1196.3 | 14.2 | 854.3 | 21.2 | 1271.0 |
200 | 171.3 | 13.1 | 784.4 | 10.0 | 601.4 | 22.6 | 1355.1 | 16.1 | 967.7 | 24.0 | 1439.7 |
225 | 191.4 | 14.6 | 876.3 | 11.2 | 671.8 | 25.2 | 1513.9 | 18.0 | 1081.1 | 26.8 | 1608.4 |
250 | 211.5 | 16.1 | 968.2 | 12.4 | 742.3 | 27.9 | 1672.7 | 19.9 | 1194.5 | 29.6 | 1777.0 |
275 | 231.6 | 17.7 | 1060.1 | 13.5 | 812.8 | 30.5 | 1831.4 | 21.8 | 1307.9 | 32.4 | 1945.7 |
300 | 251.6 | 19.2 | 1152.0 | 14.7 | 883.2 | 33.2 | 1990.2 | 23.7 | 1421.3 | 35.2 | 2114.4 |
325 | 271.7 | 20.7 | 1243.9 | 15.9 | 953.7 | 35.8 | 2149.0 | 25.6 | 1534.7 | 38.1 | 2283.1 |
350 | 291.8 | 22.3 | 1335.8 | 17.1 | 1024.2 | 38.5 | 2307.8 | 27.5 | 1648.1 | 40.9 | 2451.8 |
375 | 311..9 | 23.8 | 1427.7 | 18.2 | 1094.6 | 41.1 | 2466.5 | 29.4 | 1761.5 | 43.7 | 2620.5 |
400 | 331.9 | 25.3 | 1519.6 | 19.4 | 1165.1 | 43.8 | 2625.3 | 31.2 | 1874.9 | 46.5 | 2789.2 |