5 Installation at Site
83 of 100
Swing check valves
Preferably install swing check valves in horizontal pipes. When installing them in
vertical pipes, make sure that the flow direction is upward. In the unpressurised
condition, the valve disc will then be closed by its own weight.
Lift check valves
The valves must be installed in such a manner that the fluid enters the valve beneath
valve disc 351 and flows out above the valve disc.
Valves without a spring can only be installed in a vertical position, i.e. in horizontal
pipes and with the cover pointing upwards.
Strainers
Strainers can be installed in horizontal or vertical pipes. The fluid must always enter
through the screen inlet. Flow through strainers installed in vertical pipes must
always be downwards.
Installation location
The valve must not be fitted downstream of tees and level and three-dimensional
double bends.
5.3 Welding into the pipeline
Responsibility for welding the valve into the piping and for any heat treatment
required lies with the commissioned construction company or the plant operator.
CAUTION
Weld beads, scale and other impurities
Damage to the valve!
▷
Take suitable measures to protect the valve against impurities.
▷
Remove any impurities from the piping.
▷
If necessary, install a strainer.
CAUTION
Incorrect earthing during welding work on the piping
Damage to the valve (scorching)!
▷
Open the valve during welding.
▷
Never earth the electric welding equipment on the valve's functional parts.
CAUTION
Non-compliance with the max. permissible application temperature
Damage to the valve!
▷
Complete the weld seam in several steps to ensure that the temperature in the
middle of the body does not exceed the max. permissible application
temperature.
NOTE
For valves with socket weld ends, comply with the insertion depth given in the
applicable technical code. A gap between the pipe end and the base of the weld
socket prevents impermissible stress on the weld.
5.4 Valves with actuator
Install valves with transmission gear and/or actuators with the stem in the vertical
position. If this requirement cannot be met, adequately support the actuator on site
or consult KSB.
Mounted actuators are factory-set and ready for operation. Changes to these
settings, e.g. changes to the set switching points of the limit positions, may impair
the valve's function and result in damage to the actuator, valve or the system.
Summary of Contents for ECOLINE FYC
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