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Relief Valve – 800

$188.17 – $766.95

This low capacity relief valve has been designed for use in small pressure vessels. The ASME certified slope of 0.42 yields, for example, a capacity of 9.3 lbs per minute of air @ 250# set pressure.

Increased Durability
Corrosion Resistance

Assembly Options

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SKU: N/A Category: Relief Valves Tags: 800, Relief Valve

Description
Additional information

Description

Part #	NB Cert. #	Body Material	Wt (lbs)	Size
800	51163	A36 Carbon Steel Black Oxide Coated	3.2	½” MNPT inlet x ¾” FNPT outlet

#800 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
National Board Certification #: 51163 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.

800 Series Capacity Chart Slope = 0.42 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
50	29.3	2.2	134.1	1.7	102.8	3.9	231.6	2.8	165.4	4.1	246.1
75	40.8	3.1	187.0	2.4	143.4	5.4	323.0	3.8	230.7	5.7	343.2
100	52.4	4.0	239.9	3.1	183.9	6.9	414.4	4.9	296.0	7.3	440.3
125	63.9	4.9	292.8	3.7	224.5	8.4	505.8	6.0	361.2	9.0	537.4
150	75.5	5.8	345.7	4.4	265.0	10.0	597.2	7.1	426.5	10.6	634.5
175	87.0	6.6	698.6	5.1	305.6	11.5	688.6	8.2	491.8	12.2	731.6
200	98.6	7.5	451.5	5.8	346.2	13.0	780.0	9.3	557.0	13.8	828.7
225	110.1	8.4	504.4	6.4	386.7	14.5	871.4	10.4	622.3	15.4	925.8
250	121.7	9.3	557.3	7.1	427.3	16.0	962.8	11.5	687.6	17.0	1022.9
275	133.2	10.2	610.2	7.8	467.8	17.6	1054.2	12.5	752.8	18.7	1120.0
300	144.8	11.1	663.1	8.5	508.4	19.1	1145.6	13.6	818.1	20.3	1217.1
325	156.3	11.9	716.0	9.1	548.9	20.6	1237.0	14.7	883.4	21.9	1314.2
350	167.9	12.8	768.9	9.8	589.5	22.1	1328.4	15.8	948.7	23.5	1411.3
375	179.4	13.7	821.8	10.5	630.1	23.7	1419.8	16.9	1013.9	25.1	1508.4
400	191.0	14.6	874.7	11.2	670.6	25.2	1511.2	18.0	1079.2	26.8	1605.5

Additional information

Outlet Port Size	3/4"
Assembly Options	Dual Assembly With Unions, Dual Assembly Without Unions, Single Valve

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