Installation/Operation/Maintenance
Direct-activated Pressure
Relief/Sustaining/Back Pressure Valve
Installation/Operation/Maintenance Manual
1. Installation
a) Confirm the valve is suitable for the system, such as media, function, pressure, etc.
b) Before installation, the pipe of the system must be cleaned, and no fragment or any
garbage is allowed in the pipe.
c) Before the inlet of the valve, a strainer is needed; this can make the valve work properly.
d) Two shutoff valves can be installed at the inlet and the outlet of the valve, which will
facilitate the maintenance of the valve. Upstream of the valve to be installed at more than
five times the diameter pressure gauge to read the line pressure.
e) Following the arrow direction when installing the valve, and the arrow direction must be
conform to the flow direction.
f) The valve can be installed horizontally or vertically, and the maintenance space must be
held.
g) A pressure gauge or a plug (connected with PT1/8" thread) can be installed in the port of
PT1/8" in Fig.1.
Model: 72
Adjusting Screw
Locking Nut
Flow
Size/Flow Direction
PT1/8”
5D
Fig.1
