Diaphragm seal MGS9/1B


Diaphragm seal with threaded connection

Diaphragm seals are designed to isolate the sensing element of pressure gauges, pressure switches and electronic pressure transmitter from process fluids which may be corrosive, viscous, sedimentous and/or with a high temperature.
The diaphragm, welded for model 1B0 and mechanically clamped between the upper housing and intermediate ring for model 1BS , is leak proof tested to guarantee fill fluid separation from process fluid. This diaphragm seal can be cleaned by removing the lower housing.
This construction feature and its compact design suits to many applications requiring frequent maintenance.


  • Function: Accessories
  • Materials: Stainless steel and special materials
  • Accessories: Diaphragm seals
  • Process connection: Threaded
  • Range: 0...0,1 / 0...40bar
  • Sensing element: Welded diaphragm
  • Process connection material: AISI 316 L, Monel 400, Hastelloy C276
  • Sensing element material: AISI 316 L, AISI 316 L+PTFE, Monel 400, Hastelloy C276, Tantalum, Alloy 600, Alloy 825, Alloy 625
  • Sealing: PTFE gasket
  • Chemical, Petrochemical
  • Energy
  • Water treatment
  • Oil & Gas
  • Machine building (OEM)
  • Engineering Procurement Construction (EPC)
  • NACE version
  • ATEX version
  • Crystallizzing fluids
  • Viscous fluids
  • Corrosive fluids
  • Low pressure
  • High process temperature
  • Vacuum
  • Combined (Vacuum + Pressure)
  • Sedimentous fluids
  • NACE MR0175
  • Directive ATEX 2014/34/UE
  • NACE MR0103