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Operation

Uni-LOK "RVH2" Series Relief Valves are designed for upsteam pressure overcomes the force exerted by the spring, the poppet opens, allowing flow throuth the valve.
As the upstream pressure is only sensitive, flow through the valve increases proportinately.
Creaking pressure is only sensitive and is not affected by outlet pressure.
To increase the cracking pressure of the valve, the spring must be compressed by simply turing the adjustment cap clockwise.

General Information

Maximum Working Pressure 6000 psing (422kg/㎠)
Cracking Pressures from 200 psig to 6000 psig(14kg/㎠ to 422kg/㎠) to atmosphere.
Maximum Outlet Pressure 1450 psig (102kg/㎠) should not exceed inlet pressure.
Operating Temperature Range -23℃ to 200℃ (-10°F to 392°F)
Material : 316 Stainless Steel Construction.
 
 
Table of Dimensions.
 
Part No. Oriflce Connection Size Dimension (mm)
in mm Inlet Outlet H B C L
RVH2-08T-08T 0.250 6.35 1/2 OD 1/2 OD 148.3 46.7 46.7 60.4
RVH2-08M-08T 1/2 M NPT 1/2 OD 138.0 36.5 46.7 60.4
RVH2-08M-08F 1/2 M NPT 1/2 F NPT 138.0 36.5 36.5 50.0
RVH2-M12T-M12T 12mm OD 12mm OD 148.3 46.7 46.7 60.4
 
Ordering Information
Select the Spring Designator from the chart bellow
that correponds to the desired Cracking Pressure Range.
 
Normal Cracking Roessure Spring Designator Color Code
200 - 300 psig A Blue
350 - 750 psig B Yellow
750 - 1500 psig C Purple