What is Diaphragm Seal? Diaphragm seal system consists of a Pressure Instruments, Fill fluid and Diaphragm seal direct mounting type or capillary type. In process a flexible diaphragm and filling fluid separate the pressure instruments from process media, temperature or service. When process pressure acts on diaphragm, diaphragm displacement transfers the measured pressure through the filled system. This transferred pressure displaces the pressure sensing element of Pressure Instruments. Diaphragm seal is used to seal and safeguard instrument from the process medium. The flexibility of the seal is as such that, the diaphragm, seals the contents safely at the same time permeating the instrument to measure the pressure accurately. Diaphragms seals are in general used with other devices and instruments including pressure gauges , transmitters and switches. This combination can be used in extreme and harsh environmental conditions. The fact that they can isolate instruments fro...