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Product News: PTFE Diaphragm

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PTFE: When you need a material that works in harsh environments.

PTFE Family “We are continually faced with a series of great opportunities brilliantly disguised as insoluble problems.”
~ John W. Gardner

We have always known that diaphragm performance is critical to the success of our valves. When diaphragm failure occurs, it causes a loss in time, product, and patience. Diaphragms need to be resistant to heat, steam, and chemicals. And, if that isn’t enough, they have to stand up to repeated actuation. Over the last several years, we have enhanced our line up of diaphragm materials (Silicone, EPDM, Parylene, Viton) to adapt to the different tortures that our customers put diaphragms through. We understand the need to balance durability and cost and, most important, we refuse to compromise our commitment to providing the most aseptic valves on the market.

But what if your application involves working with harsh chemicals such as heptane or methyl chloride? PTFE is the material of choice.

Here is the challenge: PTFE is not an elastomer. It doesn’t stretch when the actuator pushes on it and it “cold flows” at the seat with the valve. As a result, designing a PTFE radial diaphragm that doesn’t leak has been extremely difficult, to say the least. But we have finally succeeded!

PTFE diaphragms for ASEPCO tank valves are now available in 1 inch, 1.5 inch, 2 inches, and 3 inches. Due to the difference in how the material handles during actuation, existing actuators need to be modified if you want to move to PTFE.

Give us a call, we’d love to help you solve any challenge you might have.

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Best wishes,


ASEPCO – Thinking Ahead – Saving You Time, Saving You Money, and Improving Your Products.

Phone: 800.882.3886


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