Chemical / Diaphragm Seal Unit



  • Corrosive process fluid
  • Highly viscous process fluid
  • Process fluid having sediments or solid particles
  • Process fluid having tendency to solidify, freeze or crystallize at lower
  • Temperatures which may block the sensing element
  • Hazardous process fluid

  • Specifications
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Non wetted parts CS, SS304, SS316
Diaphragm SS316, SS316L, PTFE, SS PTFE coated, Titanium, Hastelloy B, Hastelloy C, Nickel, Monel, Tantalum
Wetted Parts SS316, SS304L, SS316L, SS PTFE coated / lined / block, Hastelloy B, C
Filling Fluids Silicone Oil, DC-200 (-45°C to 205°C)

DC-704 (0 to 315°C)

DC-705 (20 to 350°C, Short term exposure up to 400°C)

DC-710 (5 to 345°C)

Fluorolube Oil (-40°C to 150°C)

Glycerine (5 to 80°C)

Halocarbon Oil (-40°C to 235°C)

Food Grade Vegetable Oil (5 to 182°C)

Optional Feature: Capillary for Remote mounting of the Pressure Instrument

Flushing Ring (Spacer Ring) for purging / cleaning the area below the diaphragm

without removing the Seal from the process line

Stud / Nut & Gasket, for assembling the Diaphragm Seal with Process Flange.
Different types of Diaphragm Seal offered:
1) Sandwich Type (Threaded or Flanged Connection)
2) Sandwich Type (Flanged Connection)
3) Threaded Flush Diaphragm Seal (Small / Mini Diaphragm Seal)
4) Flush Diaphragm Seal (Flanged Connection)
5) Pan Cake type Diaphragm Seal (Flanged Connection only)
6) Extended Diaphragm Seal (Flanged Connection only)
7) In line flow through type (Flanged or Weld in connection)
8) In line flow through Jacketed type (Flanged or Weld in connection)
9) In line flow through type with Cylindrical Diaphragm
10) In line Isolating Ring type