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Teflon shim (washer) between
2

Teflon shim (washer) between

Teflon shim (washer) between

(OP)
Hello everybody,
Do I need teflon pads between the legs of the heat exchanger and concrete / steel. What is the practice? Do some standard covers? Thanks

RE: Teflon shim (washer) between

Do you mean slide bearing support?

Yes, horizontal exchangers shall be fixed on one saddle and free to move in the longitudinal direction at the other saddle.

RE: Teflon shim (washer) between

Your sliding saddle does not always require teflon pads. They just need to have the ability to move. i.e. slotted bolt holes.

Not sure if TEMA has any guidelines, but all of our exchangers are just resting on the metal supports.

RE: Teflon shim (washer) between

(OP)
ripaklee, thank you. However I am aware about necessity for free moving of HE, but some suppliers require slide bearing support (teflon plate) between HE support foot and concrete foundation. Some of them ask me to put steel plate instead of teflon. Is there any firm practice or standard? tnx.

RE: Teflon shim (washer) between

API STD 660

RE: Teflon shim (washer) between

(OP)
There is no anything about PTFE slide bearing for supporting legs in API STD660 as far as I know. Anyway - thank you.

RE: Teflon shim (washer) between

The standard is clear that the Vendor shall be responsible for the design of the supports - with or without PTFE on the slide bearing saddle - and the Purchaser for the design review.

For further reading on PTFE slide plate assembly, please visit the website of Carpenter & Paterson Ltd. or similar manufacturers.

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