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5.1 Precaution for installation
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.
1. Do not disassemble the product unless it is necessary.
* Failure to follow this notice may prevent the product from functioning properly.
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
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 Fig.5.
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.
3. Note that the sensing pipe must be connected so that the valve side is higher than the pressure
sensing side.
5. Installation
Warning
Caution
Warning
Fig.5
10
EPDT-021a
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