9
■EPDT-179c■
6.3 How to connect External sensing port
Connect the sensing pipe(
φ
8-2m)and joints(
φ
8-R3/8)as shown in Fig.3 below.
Fig.3
7. Operation guidelines
7.1 Warning and precaution on operation
WARNING
(1)
Never touch the pressure reducing valve with bare hands while and after hot fluid flows.
※
You may be suffered burns on hands.
(2)
Before flowing hot fluid, make sure that the fluid will not cause risk at the end of the
piping system and that the pipes are positively connected.
※
Blowout of hot fluid will cause burn injury.
CAUTION
(1)
Before flowing fluid, close the stop valve at upstream and downstream of the pressure
reducing valve and completely remove the foreign matter through the bypass pipe.
※
Foreign matter in the pressure reducing valve will degrade the valve performance.
(2)
To deliver the fluid, open all stop valves gradually to avoid hunting.
※
Hunting will damage the pressure reducing valve and equipment.
(3)
When opening the bypass stop valve, ensure that the outlet pressure will not exceed
the set pressure of the safety valve or the primary pressure regulating valve.
※
If the outlet pressure exceeds the set pressure of the safety valve or the primary
pressure regulating valve, the safety (regulating) valve operates and blows out fluid.
(4)
Before discontinuing the operation for a long period, completely purge fluid from the
pressure reducing valve and piping system and close the stop valves located upstream
and downstream the pressure reducing valve.
※
Foreign materials developed in the piping may cause malfunction of the pressure
reducing valve.
Joint (
φ
8-R3/8)
Sensing pipe (
φ
8-2m)
1. Put a sealing tape around the
thread of the joint and screw it
into the connection to the
pressure gauge.
2. Push one end of the sensing
pipe through the joint all the
way into the connection to the
pressure gauge and the other
end into the body. Tighten each
of the cap nut till it cannot be
turned by hand and then
retighten them by about 1 1/4
turns using a tool.
3. Slope the sensing pipe from
the product side down to the
pressure gauge side.
※
Please have a sensing pipe and joints at your end.(GD-400SS)
