6 Commissioning/Start-up/Shutdown
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0570.81/22-EN
6 Commissioning/Start-up/Shutdown
6.1 Commissioning/Start-up
6.1.1 Prerequisites for commissioning/start-up
Before commissioning/start-up of the valve, ensure that the following requirements
are met:
▪
The material, pressure data and temperature data of the valve are compatible
with the operating conditions of the piping.
▪
The material's chemical resistance and stability under load have been checked.
CAUTION
Overloading of valve
Damage to the valve!
▷
The nominal pressure classes only apply at room temperature. Refer to the
pressure/temperature ratings tables for higher temperature values. . Using the
valve in conditions deviating from those specified will lead to overload which
the valve cannot withstand.
CAUTION
Welding beads, scale and other impurities in the piping
Damage to the valve!
▷
Remove any impurities from the piping.
▷
If necessary, install a strainer.
1. Thoroughly clean, flush and blow through all vessels, pipelines and connections
(especially of new installations).
2. Remove the valve's flange covers before installing it in the piping.
3. Check that the inside of the valve is free from any foreign objects. Remove any
foreign objects.
4. If required, install a strainer in the piping.
DANGER
Surge pressure/water hammer potentially occurring at high temperatures
Danger to life caused by burns or scalds!
▷
Do not exceed the valve's maximum permissible pressure.
▷
Use valves made of nodular cast iron or steel.
▷
The operator shall provide general safety measures for the system.
CAUTION
Steam hammer potentially occurring at high temperatures
Damage to the valve!
▷
Drain the valve body completely.
▷
Specify drainage requirements in the purchase order.
▷
Unless otherwise agreed, drain branches shall be used exclusively for draining
the valve body.
