Maintenance | Operation Manual C 2213 |
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If there are red spots on the nickel-plating of the inlet valve body, it can be used further on. Only if the spots
are located on a sealing surface for the O-rings the component should be exchanged because otherwise
chlorine easily could pass the sealing. In most cases damages of the nickel-plating are resulting from humidity
penetrating the inlet valve if the cylinder is exchanged or stored without using a sealing plug.
9.1.3 Mounting of inlet valve
A PVC-wall holder is quite useful when mounting the inlet valve. Attach the inlet valve to the wall holder using
the union nut and then put it down. Now you have both hands free for carrying out the actual mounting work.
After cleaning and drying, the inlet valve is mounted in reverse order. Wrap a minimum of two layers of PTFE
tape around the thread of the manometer. With the help of a bench vice, the manometer can easily be installed.
All gaskets, springs, balls and filters are exchanged. All O-rings and gaskets are mounted dry. Make sure that
the felt filter is seated properly. To be on the safe side, the screws should be exchanged as stainless steel
embrittles after being used in chlorous atmosphere which is not visible with the naked eye. The screws also
should be greased with fitting grease or sprayed with Teflon and tightened crosswise until the gap of the inlet
valve housing is closed.
Before mounting the diaphragm to the diaphragm disc the diaphragm bulges should also be lubricated with
silicone grease. The threaded ring is first tightened up to the first resistance and then not more than 45°
turn using a tool. Make sure that the diaphragm does not warp. Wet the O-ring with silicone grease, insert it
and smooth it down with the thumb until it lies flat in the groove. Make sure that the diaphragm is properly
positioned when assembling the plastic housing. The housing is tightened by hand.
9.1.4 Flow meter
For maintenance purposes the housing and if necessary the flow meter are cleaned and the gaskets are
exchanged. To dismount it the lower clamping screw is unscrewed. The O-rings are carefully pulled out of the
drilling hole using an edgeless object. Do not damage the PVC! The O-ring on the setting spindle is carefully
removed in the same way. The thread of the adjustment screw is cleaned from dirt and mounted when dry.
Fig. 16: Flow meter and housing
The plastic plugs of the flow meter are carefully dismounted and the float element is removed. For cleaning
isopropyl alcohol is perfectly suitable.
NOTICE!
Do not mix up the float element with other flow meters and make sure that it is not damaged! When mounting
the flow meter to the housing make sure that the O-rings are seated correctly.
