Type H800 Relief Valves

The Type H800 relief valve is a compact, lightweight, direct-operated relief valve. It is used primarily between a pneumatic instrument and its supply pressure regulator to limit the instrument supply pressure to 50 psig (3,4 bar) should the supply pressure regulator fail open.

Features

Application Dependability
Easy Installation
Economical
Tamper-Resistant

Body Size and End Connection Style
NPS 1/4, NPT

Flow Coefficient

Wide-Open Cg: 55
Km: 0.79

Maximum Allowable Inlet (Relief) Pressure
250 psig (17,2 bar)

Relief Pressure Range
Non-adjustable, start-to-discharge between 39 to 44 psig (2,7 to 3,0 bar)

Reseat Pressure
35 psig (2,4 bar) or higher

Temperature Capabilities
-20 to 150° F (-29 to 66° C)

Approximate Weight
5 ounces (140 grams)