CKD WKF2 Series - Piping Installation Details; Torque and Sealant Guidelines

14
WFK2
Series
When installing piping, align the uid ow direction
to the direction marked on the body. Connecting
the pipe in the wrong direction prevents correct
measurement of the ow rate.
Before installing piping, clean the pipes to remove
foreign matter, cutting chips, residual testing water,
etc.
Make sure that no force is applied to the resin parts
when piping.
Make sure that the self-weight of the piping is not
applied to ow rate sensor.
It may lead to damage or external leakage. We
recommend that piping be xed during operation.
Make sure that no sealing tape or adhesive enters
the pipes when connecting the piping.
When freezing may occur, take antifreezing
measures with the devices used, such as draining
the pipes of water.
If there is signicant difference between the ambient
temperature and the uid temperature, condensation
occurs, which can enter wiring parts and cause
operation failure. If condensation should occur,
ensure that the mounting orientation of the ow rate
sensor is horizontal and the display is facing upward.
When connecting pipes, wrap sealing tape in the
opposite direction from threads starting 2 mm inside
from the end of piping threads.
If sealing tape protrudes from the pipe threads, it could be
cut when screwing the bolts in. This could cause the tape to
enter the valve, causing failures.
When using a liquid sealant, make sure it does not adhere
to resin parts. Otherwise resin parts could be damaged,
which is dangerous.
Flow direction
Use proper torque to tighten the pipes when
connecting them.
The purpose is to prevent water leakage and screw
damage.
First tighten the screw by hand to ensure that threads are
not damaged, then use a tool.
When mounting piping or ttings to this product, always
hold the attachment on the mounting side with a tool.
Holding the body of the product or the attachment on the
opposite side may lead to damage.
(Recommended values)
Port thread Tightening torque N·m
Rc3/8 31 to 33
Rc1/2 41 to 43
Rc3/4 62 to 65
Rc1 83 to 86
Rc1 1/4 94 to 100
Rc1 1/2 104 to 108
Solid/liquid
sealant
Solid/liquid
sealant
OK
OK