Quad-ring valves

WEKA Q-valves essentially have the same properties as bellows valves; however, they are not metallically sealed towards the outside, but with a soft sealing. Typically, they are used for liquid nitrogen applications or in air separation units at temperatures up to 80K down.

They possess a design optimised for heat incidence.

Actuator type
Temperature range of fluid
Body pattern
Nominal pressure PN
Nominal diameter DN
Spindle seal
Typical fluids
Valve type
Further approvals
Housing material
PM-TxQV PN6
  • Nominal diameter DN 2 … 150mm (1/12 … 6")
  • Nominal pressure PN ≤ 6bar
  • Temperature range of fluid 77 … 373K (-196 …+100°C)
PM-TxQV PN25
  • Nominal diameter DN 2 … 150mm (1/12 … 6")
  • Nominal pressure PN ≤ 25bar
  • Temperature range of fluid 77 … 373K (-196 …+100°C)
PM-TfDQV PN6
  • Nominal diameter DN 32 … 150mm (1 1/4 … 6")
  • Nominal pressure PN ≤ 6bar
  • Temperature range of fluid 77 … 373K (-196 …+100°C)
PM-TfDQV PN25
  • Nominal diameter DN 32 … 150mm (1 1/4 … 6")
  • Nominal pressure PN ≤ 25bar
  • Temperature range of fluid 77 … 373K (-196 …+100°C)

Pneumatic cold valve

PM-WxQV PN6
  • Nominal diameter DN 2 … 150mm (1/12 … 6")
  • Nominal pressure PN ≤ 6bar
  • Temperature range of fluid 243 … 373K (-30 …+100°C)
PM-WxQV PN25
  • Nominal diameter DN 2 … 150mm (1/12 … 6")
  • Nominal pressure PN ≤ 25bar
  • Temperature range of fluid 243 … 373K (-30 …+100°C)

Pneumatic warm valve

Hx-TxQV PN6
  • Nominal diameter DN 2 … 150mm (1/12 … 6")
  • Nominal pressure PN ≤ 6bar
  • Temperature range of fluid 77 … 373K (-196 …+100°C)
Hx-TxQV PN25
  • Nominal diameter DN 2 … 150mm (1/12 … 6")
  • Nominal pressure PN ≤ 25bar
  • Temperature range of fluid 77 … 373K (-196 …+100°C)
Hx-TfDQV PN6
  • Nominal diameter DN 32 … 150mm (1 1/4 … 6")
  • Nominal pressure PN ≤ 6bar
  • Temperature range of fluid 77 … 373K (-196 …+100°C)
Hx-TfDQV PN25
  • Nominal diameter DN 32 … 150mm (1 1/4 … 6")
  • Nominal pressure PN ≤ 25bar
  • Temperature range of fluid 77 … 373K (-196 …+100°C)

Manual cold valve

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

Manual warm valve

EG-TxQV PN6
  • Nominal diameter DN 2 … 100mm (1/12 … 4")
  • Nominal pressure PN ≤ 6bar
  • Temperature range of fluid 77 … 373K (-196 …+100°C)
EG-TxQV PN25
  • Nominal diameter DN 2 … 65mm (1/12 … 2 1/2")
  • Nominal pressure PN ≤ 25bar
  • Temperature range of fluid 77 … 373K (-196 …+100°C)
EG-TfDQV PN6
  • Nominal diameter DN 32 … 100mm (1 1/4 … 4")
  • Nominal pressure PN ≤ 6bar
  • Temperature range of fluid 77 … 373K (-196 …+100°C)
EG-TfDQV PN25
  • Nominal diameter DN 32 … 65mm (1 1/4 … 2 1/2")
  • Nominal pressure PN ≤ 25bar
  • Temperature range of fluid 77 … 373K (-196 …+100°C)

Electric cold valve

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

Electric warm valve

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