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11. Before piping, remove foreign substances and note that seal materials must not flow into the inside of
the valve and piping.
* Foreign substances may cause valve seat leakage and malfunction.
12. Deterioration of rubber parts may be accelerated by influence of pipe seal material.
13. When using the product under the conditions where the outlet pressure can accidentally become
higher than the inlet pressure, install a check valve at the outlet side to prevent backflow.
* Failure to follow this notice may cause backflow even during the solenoid valve is closed.
14. In case of a possible frozen line, take proper measures to remove water inside the piping or equip the
product with insulating materials.
* Freezing may damage the product. However, do not insulate the coil.
15. When installing the product in the piping, do not grip and turn it with a tool.
* Failure to follow this notice may damage the coil.
16. Do not pull the lead wires or hold the wire to lift and carry the product.
As for the terminal box attached type, do not pull the terminal box or carry the product by holding the
terminal box only.
* Failure to follow this notice may damage the coil (or the terminal box).
17. Make the lead wires connected to the coil long enough so that the coil is easily dismounted or
replaced when required.
18. Band and support the lead wires of the coil to avoid their contact with workers or other equipment
and to avoid subjecting the wires to its own weight and tension.
19. Install the product with the coil faced upward if the pressure difference between the inlet and the
outlet sides of the product can accidentally become 0 MPa at least temporarily (see the table 1 on
Page 1).
* Failure to follow this notice may keep the product from functioning properly.
20. When an automatic control valve is installed at the inlet or outlet side of the product, keep more than
3 meters between them.
* Failure to follow this notice may result in malfunction of the product due to differential pressure
fluctuation caused by fluctuation in inlet pressure at the time of the product actuation.
21. The nominal size of piping at the product inlet side should not be smaller than that of the product (do
not reduce the inlet pipe diameter).
Additionally, use the stop valves at the inlet and the outlet sides of the product at full open condition
(see "6.1 Piping example" on Page 7).
* Failure to follow this notice may result in malfunction of the product due to differential pressure
fluctuation caused by fluctuation in inlet pressure at the time of the product actuation.
22. If the product is in a closed piping condition, the fluid inside the pipe will expand in volume due to the
rise in fluid temperature and product may be damaged.
23. Sticky fluids may cause parts to stick and lead to malfunction.
24. Avoid connection of dissimilar metal piping which will cause a galvanic potential difference because
the product or the parts may be corroded.
25. Select the product considering conditions of use such as operation frequency and durability.
7.1 Precaution for operation
1.
Do not touch the coil with bare hands while it is energized.
* Failure to follow this notice may result in burns.
2.
Do not touch the product with bare hands when the product is used for hot fluid.
* Failure to follow this notice may result in burns.
3.
Before leading fluid, make sure that there is no danger when the fluid flows to the end of piping.
* The fluid outflow may cause physical damage.
* The hot fluid, if spouted out, may scald your skin.
7. Operating Procedure
Warning
11
■ EPDT-266c ■
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