Ernst Haage has designed a new series of high-pressure bellow valves for metering and shut-off of gases and liquids. The materials employed comprise stainless steel (standard), brass or special alloys, such as Hastelloy, titanium or Incoloy. Its main advantages are its high tightness and low demand of maintenance. Applications include the technical gas industry, the chemical industry, plant engineering and high purity gas supply. The range consists of nominal diameters from DN 2 mm to DN 25 mm for operation pressures from vacuum up to PN 420 bar. Bigger diameters up to DN 65 mm are available for an Operation Pressure of PN 40 bar. The operation temperature ranges from from –269°C to +550°C. The low leak rate of 10-7 mbar ltrs/s (standard) or 10-9 mbar ltrs/s (optional) can be tested by a Helium Leak Test upon delivery. The bellow valves are available as straight-way-valves or angle valves.
