Data Sheet
Type 630R Relief Valve
Introduction
The Type 630R is a general relief valve that is
available in NPS 1 and 2 / DN 25 and 50 body sizes.
It is frequently used at compressor stations, re neries
and similar plants requiring a backpressure gas
regulator for relief pressure settings up to 250 psig /
17.2 bar.
Features
—Provided by an O-ring seat.
—The inlet adaptor acts as a
union nut enabling speedy inspection of trim parts.
—The Type 630R is available in both
high-pressure and low pressure constructions; the
low pressure units have larger diaphragm area
to provide more accurate control of low pressure
settings while the high-pressure units can withstand
inlet pressure up to 550 psig / 37.9 bar and can
control pressures up to 250 psig / 17.2 bar.
—The Type 630R relief valve
can be easily converted in the eld to a Type 630
regulator by reversing the actuator and using a new
valve carrier, disk, and ori ce.
—Optional materials
are available for applications handling sour
gases. These constructions comply with the
recommendations of NACE International Standards
MR0175 and MR0103.
Bulletin 71.4:630R
December 2011
D100158X012
Figure 1. Type 630R Relief Valve
W1934