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(7) Do not install the product on the suction side of the pump.
*Such installation will damage the product.
(8) Avoid installing the product at a location where the flow is uneven, such as near the
discharge outlet of the pump, outlet of an elbow, downstream side of a reducer and
outlet side of a control valve. If such installation is unavoidable, spare a distance about
5 times of the nominal size and install the valve with a posture in which the disc does
not rotate by uneven flow.
*Uneven force applied on the valve disc may damage the product.
✓
Correct
4. Operation
4.1. Warnings and cautions for product usage
⚠Warning
(1) Before letting the fluid into the product, be sure that there will be no possibility of
danger if fluid flows into the ends of piping, and that the product is firmly connected.
*If the fluid flows out from the pipe ends or connection part, the surroundings will get
dirty. High temperature fluids may cause burn injury.
(2) When using with a high temperature fluid, do not touch the product with your bare
hands.
*It could result in burn injury.
⚠Caution
(3) When applying the fluid into the valve, operate the valve slowly to prevent water
hammer and condensate problem.
*Valves, fitting or other equipment may be damaged by water hammer or
condensate problem if the valve is opened rapidly.
5. Maintenance and inspection
5.1. Warnings and cautions for maintenance and inspection
⚠Warning
(1) When disassembling and inspecting the product, ensure that pressure in the valve
and pipe is atmospheric pressure. If using with high temperature fluids, cool the
product down well until it can be touched with bare hands.
*If the fluid flows out, the surroundings will get dirty. High temperature fluids may
cause burn injury.
(2) Disassembly and inspection should be conducted by properly trained personnel or
manufacturer.
Disc
-5-
✕
Wrong
Disc rotates
Disc
■EPDT-383■
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