ECOLINE-VA16
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7 Commissioning/Start-up/Shutdown
7 Commissioning/Start-up/Shutdown
7.1 Commissioning/Start-up
7.1.1 Prerequisites for commissioning/start-up
Before commissioning/start-up of the valve, ensure that the following requirements
are met:
The material, pressure and temperature data shown on the valve is in compliance
with the operating conditions of the piping.
(
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Section 5, Page 16)
The material's chemical resistance and stability under load have been checked.
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
Functional testing prior to commissioning/start-up
Check the shut-off function of the installed valve by opening and closing it several
times.
Visual inspection after/during commissioning/start-up
Check bonnet/cover bolting with joint ring for tightness after the valve has been
subjected to load conditions, or heated up for the first time. If leakage occurs or
bonnet/cover bolting is loose, evenly re-tighten it crosswise.
7.1.2 Actuation
Viewed from above, the valve is closed by turning the handwheel in clockwise
direction, and opened by turning the handwheel in counter-clockwise direction.
Direction symbols are shown on the top of the handwheel.
Globe valves are normally used in either “fully open” or “fully closed” position. For
control duties, valves should be fitted with throttling plugs.
DANGER
Failure to re-tighten bonnet/cover bolting after first loading
Leakage of hot and/or toxic fluids!
▷
Re-tighten bonnet/cover bolting, particularly of valves operated at temperatures
exceeding 200°C
