Flotronic F 500 series, Инструкция по установке, эксплуатации и обслуживанию

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Section 16 - Air Valves
This section is common to all pumps.
All air valves are bolted to a mounting plate using either 3 or 4 bolts which, after removal, will allow the
air valve to be examined in detail. Note that there will be ‘O’ ring seals and jointing materials between
the air valve and the plate which should be examined and replaced if necessary.
It is recommended that air valves, after removal, should be discarded completely and replaced with a
new valve assembly. However, should it be found expedient to service the valve then service kits can
be obtained from FPL, dependent upon the model and style specified.
On pumps with 7” or 10” diameter diaphragms the valve will contain a stainless steel perforated tube
inside which is an acetal spool which carries the sealing rings. Access to the valve component is made
by two methods.
If the body is of painted aluminium it will be found to be in three parts, the top cover plate and two
clamping sections which contain the stainless tube. To remove this stainless tube, grasp the two white
buttons at either end of the tube and lift out the complete assembly. Replace with a new assembly.
Note that the rubber moulded seal which contains this tube is off-set and will only fit in one position;
take care to ensure that it is correctly fitted.
For all other ISO2, ISO3 and ISO4 air valves the removal of two screws at one end of the body followed
by pulling the two halves of the body apart will expose the tube. ‘O’ ring seals are contained inside
the two halves of the body and these seal the stainless perforated tube once it is pushed back in to the
two body halves and reassembled. It should not be necessary to replace these seals unless aggressive
chemical attack has taken place, in which case the complete assembly should be discarded
and replaced.
Under no circumstances should the spool from the above configurations of air valve be pushed out
of the stainless tube as this is a throw away item and cannot be overhauled.
On pumps with 12” and 14” diameter diaphragms, access to the centre spool is made by removing
the two end caps and pushing the spool out, the spool being made of acetal and carrying the sealing
rings. A new spool assembly can be obtained from FPL and should be inserted carefully back into the
perforated tube which is not removable.
Be sure that all ‘O’ ring seals are refitted, and that all ports and apertures are clean and clear before
the assembly is rebuilt and replaced on to the pump.
Clean dry air is preferred and lubrication is not essential, but can be applied.
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Air Valves