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Relief Valve – 805R

$280.47 – $987.95

This reduced capacity relief valve has an angle style and larger inlet and outlet size. The ASME certified slope of 2.1 yields, for example, a capacity of 46 lbs per minute of air @ 250# set pressure.

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Description

 

Part #  NB Cert. #  Body Material  Wt (lbs) Size 
805R 51220 Ductile Iron Casting 60-40-18 8.0 1” FNPT inlet x 1 ¼” FNPT outlet

#805R safety relief valve can be mounted on the following manifolds:

  • #845- 1” x 1” x 1” FNPT (hand wheel)
  • #845F- 1” x 1” x 1” FNPT (seal cap)
  • #850MW-1"- 1 ¼ ”male x ¾ ” x ¾ ” FNPT (seal cap)
  • #875M- 1” x 1” x 1 ” FNPT (seal cap)
  • #876M- 1 ¼”x1”x1” FNPT (seal cap)
805-Schematic

Design Features
  • National Board Certification #:   51220
  • Set Pressure Range:      75-400 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.

805R Series Capacity Chart

Slope = 2.1 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
75 204.1 15.6 934.9 11.9 716.8 26.9 1615.2 19.2 1153.5 28.6 1716.0
100 261.9 20.0 1199.4 15.3 919.6 34.5 2072.2 24.7 1479.8 36.7 2201.5
125 319.6 24.4 1463.9 18.7 1122.4 42.2 2529.2 30.1 1806.2 44.8 2687.0
150 377.4 28.8 1728.4 22.1 1325.2 49.8 2986.2 35.5 2132.5 52.9 3172.5
175 435.1 33.2 1992.9 25.5 1528.0 57.4 3443.2 41.0 2458.9 61.0 3658.0
200 492.9 37.6 2257.4 28.8 1730.8 65.0 3900.1 46.4 2785.2 69.1 4143.5
225 550.6 42.0 2521.9 32.2 1933.6 72.6 4357.1 51.9 3111.5 77.1 4629.0
250 608.4 46.4 2786.4 35.6 2136.4 80.2 4814.1 57.3 3437.9 85.2 5114.5
275 666.1 50.8 3050.9 39.0 2339.1 87.9 5271.1 62.7 3764.2 93.3 5600.0
300 723.9 55.3 3315.4 42.4 2541.9 95.5 5728.1 68.2 4090.6 101.4 6085.5
325 781.6 59.7 3579.9 45.7 2744.7 103.1 6185.1 73.6 4416.9 109.5 6571.0
350 839.4 64.1 3844.4 49.1 2947.5 110.7 6642.0 79.1 4743.3 117.6 7056.5
375 897.1 68.5 4108.9 52.5 3150.3 118.3 7099.0 84.5 5069.6 125.7 7542.0
400 954.9 72.9 4373.5 55.9 3353.1 125.9 7556.0 89.9 5396.0 133.8 8027.5

Additional information

Inlet Port Size

1"
Outlet Port Size

1 1/4"
Material Type

Ductile
Assembly Options

Dual Assembly With Unions, Dual Assembly Without Unions, Single Valve

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