Name: Relief Valve - 801DHC QR
Availability: InStock

Description

Part #	NB Cert. #	Body Material	Wt (lbs)	Size
801DHC QR	51208	304 Stainless Steel	3.9	½” FNPT inlet x ¾” FNPT outlet

Design Features
National Board Certification #: 51208 Set Pressure Range: 50-400 PSI in 25 PSI increments. Special Settings can be made at no extra charge and typically takes 1-2 extra days; Each valve undergoes 3 separate test sequences for set pressures and seals, and then are lock-wired for security.	All Cyrus Shank relief valves are manufactured in accordance with ASME Boiler and Pressure Vessel Code Section VIII Division I and stamped with the ASME Certification Mark with UV Designator. All Cyrus Shank relief valve capacities are certified by the National Board of Boiler and Pressure Vessel Inspectors and stamped with the NB Certification Mark.

801DHC Series Capacity Chart Slope = 0.781 SCFM/PSIA Standard Conditions [60 ˚F, 1 Atm]
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	75.9	5.8	347.7	4.4	266.6	10.0	600.7	7.1	429.0	10.6	638.2
100	97.4	7.4	446.1	5.7	342.0	12.8	770.7	9.2	550.4	13.6	818.8
125	118.9	9.1	544.4	7.0	417.4	15.7	940.6	11.2	671.7	16.7	999.3
150	140.3	10.7	642.8	8.2	492.8	18.5	1110.6	13.2	793.1	19.7	1179.9
175	161.8	12.4	741.2	9.5	568.3	21.3	1280.5	15.2	914.5	22.7	1360.4
200	183.3	14.0	839.5	10.7	643.7	24.2	1450.5	17.3	1035.8	25.7	1541.0
225	204.8	15.6	937.9	12.0	719.1	27.0	1620.4	19.3	1157.2	28.7	1721.5
250	226.3	17.3	1036.3	13.2	794.5	29.8	1790.4	21.3	1278.6	31.7	1902.1
275	247.7	18.9	1134.7	14.5	869.9	32.7	1960.3	23.3	1399.9	34.7	2082.7
300	269.2	20.6	1233.0	15.8	945.4	35.5	2130.3	25.4	1521.3	37.7	2263.2
325	290.7	22.2	1331.4	17.0	1020.8	38.3	2300.3	27.4	1642.7	40.7	2443.8
350	312.2	23.8	1429.8	18.3	1096.2	41.2	2470.2	29.4	1764.0	43.7	2624.3
375	333.6	25.5	1528.1	19.5	1171.6	44.0	2640.2	31.4	1885.4	46.7	2804.9
400	355.1	27.1	1626.5	20.8	1247.0	46.8	2810.1	33.4	2006.8	49.8	2985.5

Additional information

Inlet Port Size	1/2"
Outlet Port Size	3/4"
Material Type	Ductile
Assembly Options	Dual Assembly With Unions, Dual Assembly Without Unions, Single Valve