King Technology 72 Owner's manual

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

Installation/Operation/Maintenance
2. Setting pressure
After installing finished, the valve must be set, follow the step below.
a) Close the valve upstream of the gate valve or ball valve.
b) Turn the adjusting screw clockwise, compression the spring of the valve.
c) The upstream gate valve or ball valve slightly open, put a small amount of fluid through
the easy adjustment. In this case the valve adjustment screw is locked, so there is no fluid
through.
d) Increase the upstream pressure, up to sustaining pressure or relief pressure.
e) Turn the adjusting screw counterclockwise slowly, until micro fluid outflow, then turn the
adjustment screw clockwise slightly, so that no fluid outflow valve.
f) Tighten the adjusting screw on the locking nut, ensure no change pressure set point, the
upstream gate valve or ball valve completely open, the adjusting of relief/sustaining
pressure valve is finished.
3. Maintaining
a) Referring to Fig.2, construction of the pressure reducing valve. If the rubber part of one of
the signed point 1, 2 or 5 is destroyed, the leakage of the valve will occur, and the
corresponding part should be changed.
b) If the valve has no function of relief/sustaining pressure, it should be inspected from two
points of part in Fig.2 that is, inspecting the leakage of point 3 and 4 in Fig. 2.
c) If the problem still exists, contact out factory.
Fig.2

Installation/Operation/Maintenance
4. Assembly of the Relief/Sustaining Pressure Valve
Fig.3
Adjusting Screw
Spring Seat Body
Diaphragm
Spring
Locking Nut
Cover
Diaphragm
Plate
Stem Bottom Cover
Piston
Packing