Diaphragm Seals
In order to isolate the measuring elemtent of pressure gauges, pressure switches and electronic pressure transmitters from corrosive, vicous and sedimentary process fluids, diaphragm seals are placed in between the measurement point and the instrument. Diaphragm seals must often be made of special high-strength materials.
Diaphragm seals are manufactured to DIN or ANSI standards.
Depending on model, following materials are available for the wetted parts:
- Stainless steel AISI 316
- Stainless steel AISI 316 with PTFE coating
- Monel 400
- Hastelloy C276
- Hastelloy B2
- Tantalum
- Icolloy 825
- Inconel 600
Please have a look at our brochure "Introduction to Diaphragm Seals" 
.
There you find recommendations as well as information about material resistances.
Model overview
 Model 04.1B0 - 04.1BS Pressure ranges from 0...0.1 bar to 0...40 bar and vacuum -1...0 bar Process connection: thread Can be dismounted for cleaning  |
 Model 04.1AS - 04.1A0 Pressure ranges from 0...400 bar to 0...600 bar Process connection: thread |
 Model 04.111 Pressure ranges from 0...6 bar to 0...250 bar Process connection: thread Can be dismounted for cleaning |
 Model 04.3A0 - 04.3B0 Pressure ranges from 0...1 bar to 0...250 bar and vacuum -1...0 bar Process connection: flange Flanged connection with passing through holes Available with PTFE coating |
 Model 04.600 Pressure ranges from 0...1 bar to 0...40 bar and vacuum -1...0 bar Process connection: flange Available with PTFE coating |
 Model 04.500Pressure ranges from 0...1 bar to 0...400 bar and vacuum -1...0 bar Process connection: flange Flanged connection with passing through holes Flush diaphragm |
 Model 04.400 Pressure ranges from 0...1 bar to 0...40 bar Process connection: flange Flanged connection with passing through holes Faced diaphragm Economic execution for special materials Available with PTFE coating |
 Model 04.MINI Pressure ranges from 0...1 bar to 0...400 bar and vacuum -1...0 bar Process connection: thread Compact and economic |
 Model 04.SAN Pressure ranges from 0...1 bar to 0...40 bar Process connection: as per DIN 11581, SMS681, RJT/APV, IDF/ISS Perfect for hygienical and food applications Surface finishing 0.76...0.38 µm |
 Model 04.AL Pressure ranges from 0...1 bar to 0...40 bar Process connection: as per ISO 2852 Clamp 1 1/2", 2", 2 1/2" Surface finishing 0.76...0.38 µm |
 Model 04.R00 Pressure ranges from 0...6 bar to 0...250 bar Process connection: to be in-lined welded or flanged connections |
 Model 04.367 Pressure ranges from 0...40 bar to 0...400 bar Process connection: thread, flush membrane Flush diaphragm with threaded connection |
 Model 04.WAFPressure ranges from 0...160 mbar to 0...160 bar Process connection: "Wafer" diaphragm seal (DIN or ANSI) |
