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Functioning of the Cavity Rinsing
Ceramat® WA 160(X) Retractable Fitting
In SERVICE position, inlet and outlet are directly connected with the calibration chamber.
The ceramic slides are mounted in an outer housing made of plastic, which is in contact with
the process. Due to diffusion (permeation), process fluids may penetrate into the cavity between
ceramic and outer housing.
Such fluids can be drained off using the cavity rinsing function. For this procedure, the inlet is
rerouted to the cavities when the WA160 moves to PROCESS position. When the rinsing func-
tion is activated (e.g. by Unical®), the cavities are rinsed and the fluids are drained off through the
outlet. Normally, rinsing should be performed every 8 hours for 30 seconds. With very frequent
probe movements, aggressive or sticky process media, the rinsing intervals should be accordingly
reduced.
Outlet
Outer housing
(PVDF, PEEK)
Ceramic,
rotating
Ceramic,
fixed
Inlet
Sensor
Cavity
Ceramic retractable fitting
in PROCESS position
Cavity
