Welded diaphragm seal

Model 8202
Threaded process connection, high pressures

Availability: Upon Request - OEM Orders

The production process of Items marked as "Upon Request..." starts after receiving the order and usually needs 3 weeks or more.

Seal-Mate group of diaphragm seals come between the pressure measuring instrument and some medias which can damage the instrument or be harmful if they get directly in touch with the instrument. In many industrial processes, it happens a lot that the media cannot or should not get into direct contact with the instrument. Sometimes that is for the sake of keeping the instrument work properly as the media is too viscous and might easily clog the process connections. And sometimes it is for hygienic purposes.

The flexible metal diaphragm of InstruMate seals is made of SS316L by default and the space between this flexible diaphragm and the instrument process connection is filled with a filling fluid, chosen in best interest of where the instrument is going to be installed.

So the intended pressure is transmitted via the flexible diaphragm to the filling fluid and then via the filling fluid to the pressure instrument.

InstruMate diaphragm seals are vacuum protected and also not sensitive to sudden sharp increase in pressure.

InstruMate threaded diaphragm seal Model 8202 can be used for corrosive and hot media and also poisonous fluid which is dangerous for environments. Seal-Mate 8202 is very much suitable for high pressure measurement at high temperatures. At 400C process temperature, the maximum pressure on 8202 diaphragm seal shall not exceed 700 bar (if Z=22mm).


  • High pressure measurement
  • Process industry with possible pressure spike
  • For hot or viscous media
  • Chemical or water treatment

Special Features

  • Welded construction with no bolts
  • Preferred design for high pressures
  • Threaded process connection with various sizes


Upper Body of Diaphragm Seal: Standard version: SS316
Lower Body of Diaphragm Seal: Standard version: SS316L
Diaphragm: Standard version: SS316L
Option: SS316L, Monel 400, Hastelloy C276
Maximum Permissible Process Temperature with Metal Seal in °C: Standard version: Option: 400 400
PN in bar: 160, 400, 600, 1000


Data sheets

Threaded diaphragm seal, welded design
  • EN

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