+GF+ DIASTAR Six Manual De Instrucciones página 33

Operating Instructions
7.3 Replacing the diaphragm
The frequency for replacing the diaphragm depends on the number of actuator cycles and the medium used. The diaphragm can be
checked by professionally disassembling the upper part.
NOTE!
The diaphragm is a consumable part!
With heavy usage the diaphragm is excessively worn and needs to be change more frequently. Worn or damaged diaphragms can
cause personal injury or property damage.
► Diaphragms and gaskets should be checked and replaced depending on the load and intensity of use.
► Only replace the diaphragm that is compatible with the valve according to the type plate.
CAUTION!
Replacing the complete diaphragm set!
If PTFE diaphragms with EPDM or FKM are used then both diaphragms must be changed.
► Make sure that both diaphragms are changed.
1. Depressurize and empty the pipe. Ensure that the diaphragm valve is depressurized and completely empty. Level and pressure
sensors indicate "0".
2. Move actuator to "OPEN" position. Position indicator is at the top.
3. Carefully unscrew the housing nut using a strap wrench (available separately).
CAUTION!
Incorrect tool for housing nut!
The use of incompatible tools can damage the housing nut. Escaping medium can cause personal injury and damage to property.
► Only open and close the housing nut with a strap wrench or hook wrench.
Pneumatic diaphragm valve DIASTAR
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