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5. Installation
5.1 Precautions for installation
Warning
(1) Since the product is heavy, securely support it using lifting devices or the like when
installing. See the product weight specified in "2. Dimensions and Weights".
* Failure to follow this notice may cause falling accident of the product, resulting in bodily
injury.
Caution
(1) Do not disassemble the valve unreasonably.
* Disassembling the valve at your discretion may affect the original performance.
(2) Before installing the product, remove foreign substances and scale from the piping.
* Failure to follow this notice may prevent the product from achieving its intended
performance due to the ingress of foreign substances and scale into the product.
(3) Install the valve so that the arrow on the valve body coincides with the direction of the fluid
flow.
* Failure to do so may prevent the valve from functioning.
(4) Install the valve perpendicularly to horizontal lines with the diaphragm chamber located at
the top.
* Failure to do so may prevent the valve from functioning.
(5) Do not connect the sensing pipe close to valves and elbows. Choose the position with the
least vibration. (Recommended straight length: 10 times the line pipe diameter)
* Failure to do so may cause inconsistent reduced pressure, which hampers correct
pressure control.
(6) Do not apply excessive load, torque or vibration to the valve.
* Doing so may result in malfunction or drastically shortened service life.
5.2 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.
[Sensing pipe connection method]
Connect the provided sensing pipe (φ8-2m)
and joint (φ8-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.
-11-
■EPDT-098a■
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