Gemue Code 4A/4 FKM diaphragm
Gemue Code 4A/4 is the FKM diaphragm from Gemue. It is the wearing part of a diaphragm valve: it separates actuator and medium, seals against the valve body and is deformed with every switching cycle. We are an authorised Gemue dealer and stock 2 versions of this series.
Where this diaphragm is used
The diaphragm is fitted in Gemue diaphragm valves and is the part that gets replaced first during operation – the valve body and the pipework stay untouched. Replacing it is routine maintenance: remove the top works, change the diaphragm, refit the top works. Complete valves are in the diaphragm valves category, further wearing and spare parts in valve spare parts.
Material and range of use
FKM (fluorocarbon rubber) combines high temperature resistance with broad chemical resistance: many acids, mineral oils, fuels and aromatic hydrocarbons. FKM is not suitable for hot water and steam or for strongly polar solvents such as ketones and esters. Gemue labels the same material FKM (ASTM) or FPM (DIN/ISO) depending on the data record – both refer to the same fluorocarbon rubber.
Diaphragm sizes and selection
This series covers diaphragm size 8. The diaphragm size is the valve size and therefore the decisive selection criterion: it is part of the type code on the installed valve and has to match exactly. A diaphragm of the wrong size will not seal, even if it can be fitted.
Versions for special requirements
Beyond the standard version this series offers: versions whose medium area is cleaned for paint compatibility.
Replacement and ordering
The decisive details for ordering are the diaphragm size and the material of the installed valve; both are part of the type code shown in the short description of every item and in the technical data. If you are unsure which diaphragm belongs in your valve, send us the type code or the item number of the valve and we will check it. Diaphragms are wearing parts – it pays to order a set for the next service at the same time.
Your benefits with us
- Worldwide shipping of all valves and measuring devices
- Large stock levels for many products – current lead time available on request
- Spare parts and service kits available
- Fast shipping via UPS (parcel) or freight forwarder (pallets), express delivery on request
- Extensive hands-on application know-how
- Personal advice on selecting the right component
