Installing Accessories; Sensing Pipe Connection Method; Operating Procedure; Precautions During Operation - Yoshitake GP-2000 Installation & Operation Manual

6.3 Installing accessories

Warning
(1) When installing the pressure reducing valve, be sure to connect the provided sensing
pipe and joint.
※Unless the sensing pipe is connected, the valve will not operate. Further, steam may
blow off, resulting burns.

6.4 Sensing pipe connection method

Fig.7

7. Operating Procedure

7.1 Precautions during operation

Warning
(1) Do not touch the valve directly with bare hands.
※Doing so may result in burns.
(2) Before flow the steam in pipe line, make sure steam can flow without any dangerous at
the end of pipe line and pipe line is connected tightly.
※In case steam blow off, it may result in burns.
Caution
(1)Close the stop valves before and after the pressure reducing valve, and remove all
foreign matter and scales via the by-pass line before operation. And, open each stop
valve slowly.
※Failure to do so may prevent the valve from functioning correctly. And, It may cause
hunting, water hammer, etc., resulting in damage to the valve and other equipment
when the stop valve is opened quickly.
(2)Secondary pressure at by-pass line must be lower than set pressure.
※Safety valve blows in case secondary pressure at by-pass line becomes higher than
set pressure.
(3)When adjusting pressure, slowly turn the adjusting screw
※Incorrect adjustment may cause hunting, water hammer, etc., resulting in damage to
the valve and other equipment.
(4)Remove condensate completely from the line, and close the stop valves before and
after the valve when not using it for long periods of times.
※Rust generated in the valves and lines may cause malfunction.
Connect the provided sensing pipe (φ8-2m)
and joint ( φ 8-R1/4) as shown in the
illustration on the left.
1.Wind sealing tapes around the joint and insert
the joint into the pressure sensing side.
2.Fully insert the sensing pipe into the valve
and the pressure sensing side joint. Tighten
the cap nut until it can no longer be rotated
manually, and then turn the cap nut about one
and quarter times with a tool. Note that the
sensing pipe must be connected so that the
valve side is higher than the pressure sensing
side.
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■EPDT-014f■