Seals, Gaskets & O-Rings
Rubber Diaphragms
Rubber diaphragms for pumps, valves and actuators, made to your drawing or matched from your old part, plain or fabric-reinforced.
What to send for a quote
- Outside diameter, bead size and any bolt holes
- Convolution depth or stroke length
- Centre plate or insert, if any
- Fluid, pressure and temperature
- Quantity now and per month
Types we make
Add the types you need to one enquiry and send them together. Every type is also made to your drawing or sample.
| Image | Type | Enquiry |
|---|---|---|
 | Rubber diaphragmsFor valves, actuators, regulators and machinery | |
| | Pump diaphragmsFor diaphragm and dosing pumps |
About these parts
A diaphragm is a flexible membrane that moves with every stroke while it keeps two chambers apart. It has to flex millions of times without cracking, so the compound and any fabric reinforcement matter as much as the dimensions.
Used in
Compounds commonly specified
| Compound | Typically chosen for |
|---|---|
| NBR | Oil, fuel and water |
| EPDM | Water and mild chemicals |
| FKM | Fuels and aggressive chemicals |
| Fabric-reinforced | Higher pressure, longer stroke |
Typical industry guidance; the compound for your part is confirmed with the quotation. Compare compounds
Not listed? We make it to your drawing or sample.
Send the drawing, the old part or a photo with sizes.
Common questions
Can you match a diaphragm from an imported pump or valve?
Yes. Send the old diaphragm, or photos beside a ruler with the outside diameter and bead size. We measure it and remake it to match.
Should my diaphragm be plain or fabric-reinforced?
Plain rubber suits low pressure and short strokes. Fabric reinforcement stops the diaphragm stretching and lets it take higher pressure. Tell us the pressure and stroke and we will advise.
What details matter most for a diaphragm quote?
The outside diameter, the bead, any holes, the stroke, and the fluid with its pressure and temperature.
Related products
Quote for rubber diaphragms
Part, quantity and your WhatsApp number are enough to start. Add drawings on the next screen.
- Custom to your drawing or sample
- Drawings can be attached on the next screen: PDF, DWG, DXF, STEP, JPG or PNG
- Used only to quote and make your parts. Privacy