Unions stainless steel – SO 5...


Safe and durable

  • unions, valves, couplings
  • Ø 1.6 to 28 mm
  • max. 250 bar
  • -196°C to +500°, up to +600° on request
  • for aggressive air, gases, liquids and oils in an aggressive environment, e.g. in chemical plants, water treatment


Characteristics, specialities

• easy and fast to install
• resistant to corrosion
• compact size
• extensive range
• many combination possibilities


Stainless steel 1.4571 (≈ 316 Ti),
alloy X6CrNiMoTi17-12-2, DIN EN 10088-3

Nominal pressure PN

40 to 250 bar, details see product table (safety factor 4)

Temperature range

-196°C to +500°C, up to +600°C on request

Leak rate with helium

10-8 mbar • l/s
(when professionally assembed; see installation instructions and tubes)


Up to 10-4 mbar, higher values are possible

Tubes to use

Tubes of plastic and stainless steel seamless precision tubes (to DIN EN 10216-5/EN ISO 1127) with clean smooth surface. Tolerance of outer diameter ± 0.1 mm. See also chapter on tubes and hoses. Further materials on request.

Inspection certificate

Inspection certificate 3.1 according to EN 10204 (with costs)


DNV GL, DVGW, SVGW, ABS, additional information on request

Adaptor stem, male thread

British Standard Pipe (BSP) and metric fine thread DIN 3852; tapered form C; thread with sealing form B. NPT-thread according to ANSI B1.20.1.
For sealing of the tapered male adaptor thread we recommend Loctite® 5061

Pressure coefficient % of PN

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