Bellow valves

In the cryogenic version, bellow valves have a vacuum weld-in flange for assembly in a vacuum-insulated cold box or line. Typically they have a cryogenic length of 875 mm and are designed in angle or straight pattern. A positioner and a pneumatic actuator, a manual actuator or an electric actuator provide for the activation of the valve, to close it or to regulate the flow of the fluid. Thanks to the metal bellow, the valve is closed off to the environment with high tightness and ensures high reliability.

Various options, such as a thermal connection to an 80K shield, end switches for the position feedback, use in a radiation environment or in the magnetic field, special connection dimensions or optimisation of the heat incidence are available on request.

The corresponding warm valve possess neither a weld-in flange nor a cryogenic length and serves for the feed of the gaseous, warm fluid into a cold box.

Actuator type
EAC approval
Ex approval
Temperature range of fluid
Body pattern
Nominal pressure PN
Nominal diameter DN
Shipbuilding approval
Spindle seal
Typical fluids
Valve type
Further approvals
Housing material
PM-TxV PN6
  • Nominal diameter DN 2 … 250mm (1/12 … 10")
  • Nominal pressure PN ≤ 6bar
  • Temperature range of fluid 1 … 373K (-272 … +100°C)
PM-TxV PN25
  • Nominal diameter DN 2 … 150mm (1/12 … 6")
  • Nominal pressure PN ≤ 25bar
  • Temperature range of fluid 1 … 373K (-272 …+100°C)
PM-TxV PN40
  • Nominal diameter DN 2 … 65mm (1/12 … 2 1/2")
  • Nominal pressure PN ≤ 40bar
  • Temperature range of fluid 1 … 373K (-272 …+100°C)
PM-TfDV PN6
  • Nominal diameter DN 32 … 150mm (1 1/4 … 6")
  • Nominal pressure PN ≤ 6bar
  • Temperature range of fluid 1 … 373K (-272 …+100°C)
PM-TfDV PN25
  • Nominal diameter DN 32 … 150mm (1 1/4 … 6")
  • Nominal pressure PN ≤ 25bar
  • Temperature range of fluid 1 … 373K (-272 …+100°C)
PM-TfDV PN40
  • Nominal diameter DN 32 … 65mm (1 1/4 … 2 1/2")
  • Nominal pressure PN ≤ 40bar
  • Temperature range of fluid 1 … 373K (-272 …+100°C)

Pneumatic cold valve

PM-WxV PN6
  • Nominal diameter DN 2 … 250mm (1/12 … 10")
  • Nominal pressure PN ≤ 6bar
  • Temperature range of fluid 243 … 373K (-30 …+100°C)
PM-WxV PN25
  • Nominal diameter DN 2 … 150mm (1/12 … 6")
  • Nominal pressure PN ≤ 25bar
  • Temperature range of fluid 243 … 373K (-30 …+100°C)
PM-WxV PN40
  • Nominal diameter DN 2 … 65mm (1/12 … 2 1/2")
  • Nominal pressure PN ≤ 40bar
  • Temperature range of fluid 243 … 373K (-30 …+100°C)
PM-WfDV PN6
  • Nominal diameter DN 32 … 150mm (1 1/4 … 6")
  • Nominal pressure PN ≤ 6bar
  • Temperature range of fluid 243 … 373K (-30 …+100°C)
PM-WfDV PN25
  • Nominal diameter DN 2 … 250mm (1/12 … 10")
  • Nominal pressure PN ≤ 25bar
  • Temperature range of fluid 243 … 373K (-30 …+100°C)
PM-WfDV PN40
  • Nominal diameter DN 32 … 65mm (1 1/4 … 2 1/2")
  • Nominal pressure PN ≤ 40bar
  • Temperature range of fluid 243 … 373K (-30 …+100°C)

Pneumatic warm valve

Hx-TxV PN6
  • Nominal diameter DN 2 … 150mm (1/12 … 6")
  • Nominal pressure PN ≤ 6bar
  • Temperature range of fluid 1 … 373K (-272 …+100°C)
Hx-TxV PN25
  • Nominal diameter DN 2 … 150mm (1/12 … 6")
  • Nominal pressure PN ≤ 25bar
  • Temperature range of fluid 1 … 373K (-272 …+100°C)
Hx-TxV PN40
  • Nominal diameter DN 2 … 65mm (1/12 … 2 1/2")
  • Nominal pressure PN ≤ 40bar
  • Temperature range of fluid 1 … 373K (-272 …+100°C)
Hx-TfDV PN6
  • Nominal diameter DN 32 … 150mm (1 1/4 … 6")
  • Nominal pressure PN ≤ 6bar
  • Temperature range of fluid 1 … 373K (-272 …+100°C)
Hx-TfDV PN25
  • Nominal diameter DN 32 … 150mm (1 1/4 … 6")
  • Nominal pressure PN ≤ 25bar
  • Temperature range of fluid 1 … 373K (-272 …+100°C)
Hx-TfDV PN40
  • Nominal diameter DN 32 … 65mm (1 1/4 … 2 1/2")
  • Nominal pressure PN ≤ 40bar
  • Temperature range of fluid 1 … 373K (-272 …+100°C)

Manual cold valve

Hx-WxV PN6
  • Nominal diameter DN 2 … 150mm (1/12 … 6")
  • Nominal pressure PN ≤ 6bar
  • Temperature range of fluid 243 … 373K (-30 …+100°C)
Hx-WxV PN25
  • Nominal diameter DN 2 … 150mm (1/12 … 6")
  • Nominal pressure PN ≤ 25bar
  • Temperature range of fluid 243 … 373K (-30 …+100°C)
Hx-WxV PN40
  • Nominal diameter DN 2 … 65mm (1/12 … 2 1/2")
  • Nominal pressure PN ≤ 40bar
  • Temperature range of fluid 243 … 373K (-30 …+100°C)
Hx-WfDV PN6
  • Nominal diameter DN 32 … 150mm (1 1/4 … 6")
  • Nominal pressure PN ≤ 6bar
  • Temperature range of fluid 243 … 373K (-30 …+100°C)
Hx-WfDV PN25
  • Nominal diameter DN 2 … 150mm (1/12 … 6")
  • Nominal pressure PN ≤ 25bar
  • Temperature range of fluid 243 … 373K (-30 …+100°C)
Hx-WfDV PN40
  • Nominal diameter DN 32 … 65mm (1 1/4 … 2 1/2")
  • Nominal pressure PN ≤ 40bar
  • Temperature range of fluid 243 … 373K (-30 …+100°C)

Manual warm valve

EG-TxV PN6
  • Nominal diameter DN 2 … 100mm (1/12 … 4")
  • Nominal pressure PN ≤ 6bar
  • Temperature range of fluid 1 … 373K (-272 …+100°C)
EG-TxV PN25
  • Nominal diameter DN 2 … 65mm (1/12 … 2 1/2")
  • Nominal pressure PN ≤ 25bar
  • Temperature range of fluid 1 … 373K (-272 …+100°C)
EG-TxV PN40
  • Nominal diameter DN 2 … 50mm (1/12 … 2")
  • Nominal pressure PN ≤ 40bar
  • Temperature range of fluid 1 … 373K (-272 …+100°C)
EG-TfDV PN6
  • Nominal diameter DN 32 … 100mm (1 1/4 … 4")
  • Nominal pressure PN ≤ 6bar
  • Temperature range of fluid 1 … 373K (-272 …+100°C)
EG-TfDV PN25
  • Nominal diameter DN 32 … 65mm (1 1/4 … 2 1/2")
  • Nominal pressure PN ≤ 25bar
  • Temperature range of fluid 1 … 373K (-272 …+100°C)
EG-TfDV PN40
  • Nominal diameter DN 32 … 50mm (1 1/4 … 2")
  • Nominal pressure PN ≤ 40bar
  • Temperature range of fluid 1 … 373K (-272 …+100°C)

Electric cold valve

EG-WxV PN6
  • Nominal diameter DN 2 … 100mm (1/12 … 4")
  • Nominal pressure PN ≤ 6bar
  • Temperature range of fluid 243 … 373K (-30 …+100°C)
EG-WxV PN25
  • Nominal diameter DN 2 … 65mm (1/12 … 2 1/2")
  • Nominal pressure PN ≤ 25bar
  • Temperature range of fluid 243 … 373K (-30 …+100°C)
EG-WxV PN40
  • Nominal diameter DN 2 … 50mm (1/12 … 2")
  • Nominal pressure PN ≤ 40bar
  • Temperature range of fluid 243 … 373K (-30 …+100°C)
EG-WfDV PN6
  • Nominal diameter DN 2 … 100mm (1/12 … 4")
  • Nominal pressure PN ≤ 6bar
  • Temperature range of fluid 243 … 373K (-30 …+100°C)
EG-WfDV PN25
  • Nominal diameter DN 2 … 65mm (1/12 … 2 1/2")
  • Nominal pressure PN ≤ 25bar
  • Temperature range of fluid 243 … 373K (-30 …+100°C)
EG-WfDV PN40
  • Nominal diameter DN 2 … 50mm (1/12 … 2")
  • Nominal pressure PN ≤ 40bar
  • Temperature range of fluid 243 … 373K (-30 …+100°C)

Electric warm valve

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