APORIS - 12
6.6 Handling
Handling means may be necessary to install large sizes valves.
They must be used as shown.
7
Commissioning/Decommissioning
7.1 Commissioning
7.1.1 General
Prior to commissioning the valve, the pressure, temperature and material data stated on the valve should be compared to
the actual operating conditions in the piping system to check whether the valve can withstand the loads occurring in the
system.
Possible pressure surges (water hammer) must not be exceed the highest admissible pressure. Adequate
precautions should be taken. In new pipe systems and especially after repair work, the system should be flushed with the
valves fully open to remove solids, e.g. weld beads, which may damage the seats.
7.1.2 Operation
The position of the disc is indicated by the pointer of the actuator or by handle lever. The valves are closed by turning in the
clockwise direction (top view) and opened in the counter clockwise direction.
7.1.3 Functional Check
The following functions should be checked: before commissioning, the shut-off-function of the valves should be checked by
repeated opening and closing
.
7.1.4 Actuated valves
Adjustable end stops and torque limiter are pre-adjusted in factory. The customer may have to complete the adjustment on
site during the commissioning, if necessary.
Verify gears and actuators Operating Manual issued by its manufacturer
7.2 Decommissioning
During extended shutdown periods, liquids liable to change their condition due to polymerization, crystallization,
solidification etc. must be drained from the piping system. If necessary, the piping system should be flushed with the valves
fully open.
Correct
Correct
Correct
FORBIDDEN
FORBIDDEN
