FromRubber Manufacture Sealing Silicone Rubber Seals for Leak Detector

A leak detector is judged by the smallest leak it can find, so its own housing must not leak at all. The seal around the sensor chamber, the battery door and the probe entry is what keeps the reference side of the instrument clean: a seal that takes a set, hardens or swells will pass ambient gas into the chamber, and the readings drift with it.

We mould silicone rubber seals as flat gaskets, moulded profiles, plug seals and boot seals, in compounds selected around the media the instrument actually meets - refrigerant oils, water, glycol, cleaning alcohol and the tracer gases the detector is built to find. Hardness is chosen with the groove, not on its own: a soft seal in a shallow groove leaks, and a hard seal in a deep groove will not compress far enough to close.

Compression set is the number that decides service life. A silicone compound that recovers well keeps pressing back after a hundred door openings; one that creeps leaves a gap that shows up as a slow, unexplained drift rather than an obvious failure, which is the hardest kind of fault for a service team to trace.

To quote, send the housing or its drawing with the groove dimensions, the gap to be closed, the fluids and cleaning agents used, the temperature range the instrument is rated for, and the annual volume. If a worn seal is all you have, we measure the groove rather than the seal, because a compressed gasket has already lost the dimensions that matter.

Mould and compound run under one roof, so the seal can be adjusted at the tool when the housing changes, instead of being re-sourced from a second supplier.