Stainless Steel Diaphragm Seal Gauges

A diaphragm seal is a separator connected to either directly or via a capillary tube, to the pressure gauge to isolate it from the process fluid. They are also known as chemical seals, barrier seal or fluid separators. These are used when; The process fluid can solidify or crystallize; When the process contains solid matter, or has a high viscosity; When the process fluid could corrode the measuring element.

Operation:

The diaphragm seal consists of an elastic element, [diaphragm] that isolates the process material from the pressure gauge element, transmitting the pressure through the compression of the filling medium to the gauge.

Connection:

Direct mounting, or remote reading via a capillary tube. [Maximum length 15 metres.]

Fitting:

Diaphragm seals must be connected to the process by tightening using the spanner flats on the seal, and not by the gauge. On remote reading gauges, if the gauge is to be fitted higher than the seal, a feet head allowance should be made.