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6.1 Precaution for operation
1. Do not touch the product with bare hands directly.
* Failure to follow this notice may result in scalds.
2. Before applying steam to the product, confirm that there is no risk when steam flows into the piping
end and that piping joints are securely connected.
* Failure to follow this notice may result in scalds in case of steam blow out.
1. Before leading fluid into the product, close the stop valves at the inlet and outlet of the product and
remove foreign substances and scale from the piping completely by using a bypass line.
* Failure to follow this notice may prevent the product from functioning properly due to the ingress of
foreign substances and scale into the product.
2. Adjust pressure of the bypass stop valve manually to prevent the outlet pressure from going over the
set pressure of the safety valve.
* If going over, the safety valve blows out.
3. Before stopping operation of the product for an extended period, completely discharge fluid from the
product and close the stop valves at the inlet and outlet sides of the product.
* Failure to follow this notice may cause malfunction due to rusting inside the product and the pipes.
6.2 Adjusting procedure
Taking a wrong adjusting procedure may cause hunting, scale problems or water hammer, and can
heavily damage the main parts of the valve. Be sure to follow the procedure below (see also "5.4 Piping
example").
1. Confirm that all stop valve (V
2. Open the stop valve for trap before the product.
3. Open the stop valve (V
the safety valve. Then completely discharge foreign substances by allowing fluid pass through
the piping. After discharging, be sure to close the bypass stop valve.
4. Set the operating air pressure to no pressure.
5. Open the stop valve (V
Open the stop valve (V
6. Slowly open the stop valve (V
of the product is discharged from the trap.
7. While watching the pressure gauge on the secondary side, increase the operating air pressure
with a standard unit, etc., and adjust to the desired pressure. Be sure to release a small amount
of operating air pressure with a needle valve. (For the needle valve of the standard unit, open
the valve opening by 1/2 to 1 turn.)
8. Slowly open the stop valve (V
the desired pressure.
9. After completing the adjustment, fix the handle of the pressure reducing valve of the operating
air pressure unit.
6. Operation procedure
Warning
Caution
-V
) is closed.
1
7
) and adjust the opening of the bypass stop valve (V
3
) of sensing pipe and the stop valve (V
4
) so that a little fluid can flow through.
3
) at the inlet side after checking that condensate in the inlet side
1
) and make fine adjustments so that the secondary pressure is
3
13
) so as not to blow
6
) at the outlet side of the product.
2
EPDT-021a
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