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How does a diaphragm seal work?

How to choose a diaphragm seal: https://www.budenberg.co.uk/blog/what... Order your Diaphragm Seal from Budenberg Gauge: https://www.budenberg.co.uk/store/gau... A diaphragm pressure gauge or 'Chemical Seal' is an instrument normally used to measure the pressure of toxic, corrosive, and fibrous media. If a standard pressure gauge were to be used it would be damaged, become clogged, or would have a reduced life expectancy, if allowed to enter the sensitive mechanism and materials within the instrument. The diaphragm can also be used to measure atmospheric pressure, the pressure within a gas canister, or to measure a vacuum. It is different from the standard bourdon pressure gauge in that it does not have a small inlet hole and does not allow the process media to enter the pressure gauge. 0:00 Intro 0:16 How a diaphragm seal works 2:00 Environments in which diaphragm seals are used 2:20 Main uses for diaphragm seals 3:37 Welded diaphragm seals 4:50 Clamped diaphragm seals 5:48 Selecting a diaphragm seal 6:25 Budenberg Ultra-Safe diaphragm seal