Quad-ring valves for optimized cryogenic applications
WEKA Quad-ring valves combine the proven technology of our bellows valves with an innovative soft sealing solution for the dynamic spindle sealing. Instead of a metal seal, these valves feature a dynamic quad-ring seal that has been specially developed for temperatures down to 80K.
Discover the technical specifications, design variants, and application options of our Q valves for your optimal system solution.
Quad ring valves

Specialized for liquid nitrogen applications and air spearation
These valves are the first choice in air separation technology and liquid nitrogen applications. The thermally optimized design minimizes heat load, thereby maximizing the efficiency of cryogenic systems.
Quad-ring technology offers reliable sealing while reducing complexity compared to all-metal solutions—ideal for applications where cost efficiency and ease of maintenance are crucial.
Valve mechanism: |
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Fluid temperature range: |
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Nominal diameter DN with nominal pressure PN: |
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- Body patterns
Angle E, straight G, D, Z - Vacuum integration
flange, without - Type of actuator
manual, pneumatic, electric
This product is frequently used in the following areas:
Heat load
Transfer Line Couplings, Bellow Valves, Quad-Ring Valves, SingleLine
Datasheet
Heat load
Transfer Line Couplings, Bellow Valves, Quad-Ring Valves, SingleLine
Datasheetpdf|386.63 KBSpecific Allocation
- Customized Control- and Shut-Off Valves
- EG-TfDV PN40
- EG-TfDV PN25
- EG-TfDV PN6
- EG-TxV PN40
- EG-TxV PN25
- EG-TxV PN6
- Elektric Cold Valve
- Hx-TfDV PN40
- Hx-TfDV PN25
- Hx-TfDV PN6
- Hx-TxV PN40
- Hx-TxV PN25
- Hx-TxV PN6
- Manual Cold Valve
- PM-TfDV PN40
- PM-TfDV PN25
- PM-TfDV PN6
- PM-TxV PN40
- PM-TxV PN25
- PM-TxV PN6
- Pneumatic Cold Valve
- EG-TfDQV PN25
- EG-TfDQV PN6
- EG-TxQV PN25
- EG-TxQV PN6
- Hx-TfDQV PN25
- Hx-TfDQV PN6
- Hx-TxQV PN25
- Hx-TxQV PN6
- PM-TfDQV PN25
- PM-TfDQV PN6
- PM-TxQV PN25
- PM-TxQV PN6
- TLK-S
- TLK-Si

Flow plugs
Bellow Valves, Quad-Ring Valves, Level Measurement, Accessories, Magnetic Switches, Level Transmitters, Floats, Indicator Rails / Measuring Scales, Accessories
Datasheet
Flow plugs
Bellow Valves, Quad-Ring Valves, Level Measurement, Accessories, Magnetic Switches, Level Transmitters, Floats, Indicator Rails / Measuring Scales, Accessories
Datasheetpdf|675.28 KBSpecific Allocation
- Customized Control- and Shut-Off Valves
- PM-TxV PN6
- PM-TxV PN25
- PM-TxV PN40
- PM-TfDV PN6
- PM-TfDV PN25
- PM-TfDV PN40
- PM-WxV PN6
- PM-WxV PN25
- PM-WxV PN40
- PM-WfDV PN6
- PM-WfDV PN25
- PM-WfDV PN40
- Hx-TxV PN6
- Hx-TxV PN25
- Hx-TxV PN40
- Hx-TfDV PN6
- Hx-TfDV PN25
- Hx-TfDV PN40
- Hx-WxV PN6
- Hx-WxV PN25
- Hx-WxV PN40
- Hx-WfDV PN6
- Hx-WfDV PN25
- Hx-WfDV PN40
- EG-TxV PN6
- EG-TxV PN25
- EG-TxV PN40
- EG-TfDV PN6
- EG-TfDV PN25
- EG-TfDV PN40
- EG-WxV PN6
- EG-WxV PN25
- EG-WxV PN40
- EG-WfDV PN6
- EG-WfDV PN25
- EG-WfDV PN40
- PM-TxQV PN6
- PM-TxQV PN25
- PM-TfDQV PN6
- PM-TfDQV PN25
- PM-WxQV PN6
- PM-WxQV PN25
- Hx-TxQV PN6
- Hx-TxQV PN25
- Hx-TfDQV PN6
- Hx-TfDQV PN25
- Hx-WxQV PN6
- Hx-WxQV PN25
- EG-TxQV PN6
- EG-TxQV PN25
- EG-TfDQV PN6
- EG-TfDQV PN25
- EG-WxQV PN6
- EG-WxQV PN25
- Pneumatic Cold Valve
- Pneumatic Warm Valve
- Manual Cold Valve
- Manual Warm Valve
- Elektric Cold Valve
- Elektric Warm Valve

Body pattern
Bellow Valves, Quad-Ring Valves
Datasheet
Body pattern
Bellow Valves, Quad-Ring Valves
Datasheetpdf|271.85 KBSpecific Allocation
- Customized Control- and Shut-Off Valves
- EG-WxQV PN25
- EG-WxQV PN6
- EG-TfDQV PN25
- EG-TfDQV PN6
- EG-TxQV PN25
- EG-TxQV PN6
- Hx-WxQV PN25
- Hx-WxQV PN6
- Hx-TfDQV PN25
- Hx-TfDQV PN6
- Hx-TxQV PN25
- Hx-TxQV PN6
- PM-WxQV PN25
- PM-WxQV PN6
- PM-TfDQV PN25
- PM-TfDQV PN6
- PM-TxQV PN25
- PM-TxQV PN6
- EG-WfDV PN40
- EG-WfDV PN25
- EG-WfDV PN6
- EG-WxV PN40
- EG-WxV PN25
- EG-WxV PN6
- Elektric Warm Valve
- EG-TfDV PN40
- EG-TfDV PN25
- EG-TfDV PN6
- EG-TxV PN40
- EG-TxV PN6
- Elektric Cold Valve
- EG-TxV PN25
- Hx-WfDV PN40
- Hx-WfDV PN25
- Hx-WfDV PN6
- Hx-WxV PN40
- Hx-WxV PN25
- Hx-WxV PN6
- Manual Warm Valve
- Manual Cold Valve
- Hx-TxV PN6
- Hx-TxV PN25
- Hx-TxV PN40
- Hx-TfDV PN6
- Hx-TfDV PN25
- Hx-TfDV PN40
- Pneumatic Warm Valve
- PM-WxV PN6
- PM-WxV PN25
- PM-WxV PN40
- PM-WfDV PN6
- PM-WfDV PN25
- PM-WfDV PN40
- PM-TfDV PN40
- PM-TfDV PN25
- PM-TfDV PN6
- PM-TxV PN40
- PM-TxV PN25
- PM-TxV PN6
- Pneumatic Cold Valve

Manual standard
Bellow Valves, Quad-Ring Valves
Datasheet
Manual standard
Bellow Valves, Quad-Ring Valves
Datasheetpdf|255.71 KBSpecific Allocation
- Customized Control- and Shut-Off Valves
- EG-WxQV PN25
- EG-WxQV PN6
- EG-TfDQV PN25
- EG-TfDQV PN6
- EG-TxQV PN25
- EG-TxQV PN6
- Hx-WxQV PN25
- Hx-WxQV PN6
- Hx-TfDQV PN25
- Hx-TfDQV PN6
- Hx-TxQV PN25
- Hx-TxQV PN6
- PM-WxQV PN25
- PM-WxQV PN6
- PM-TfDQV PN25
- PM-TfDQV PN6
- PM-TxQV PN25
- PM-TxQV PN6
- EG-WfDV PN40
- EG-WfDV PN25
- EG-WfDV PN6
- EG-WxV PN40
- EG-WxV PN25
- EG-WxV PN6
- Elektric Warm Valve
- EG-TfDV PN40
- EG-TfDV PN25
- EG-TfDV PN6
- EG-TxV PN40
- EG-TxV PN25
- EG-TxV PN6
- Elektric Cold Valve
- Hx-WfDV PN40
- Hx-WfDV PN25
- Hx-WfDV PN6
- Hx-WxV PN40
- Hx-WxV PN25
- Hx-WxV PN6
- Manual Warm Valve
- Hx-TfDV PN40
- Hx-TfDV PN25
- Hx-TfDV PN6
- Hx-TxV PN40
- Hx-TxV PN25
- Hx-TxV PN6
- Manual Cold Valve
- PM-WfDV PN40
- PM-WfDV PN25
- PM-WfDV PN6
- PM-WxV PN40
- PM-WxV PN25
- PM-WxV PN6
- Pneumatic Warm Valve
- PM-TfDV PN40
- PM-TfDV PN25
- PM-TfDV PN6
- PM-TxV PN25
- PM-TxV PN40
- PM-TxV PN6
- Pneumatic Cold Valve

Hydrogen Applications
Check Valves, Transfer Line Couplings, Ejectors, Bellow Valves, Quad-Ring Valves, Bättig Valves, Needle Valves, Warm Check Valves, MultiLine, SingleLine, High Pressure Valves, Cold Check Valves, Level Measurement, Accessories, Magnetic Switches, Level Transmitters, Floats, Indicator Rails / Measuring Scales, Accessories
Flyer
Hydrogen Applications
Check Valves, Transfer Line Couplings, Ejectors, Bellow Valves, Quad-Ring Valves, Bättig Valves, Needle Valves, Warm Check Valves, MultiLine, SingleLine, High Pressure Valves, Cold Check Valves, Level Measurement, Accessories, Magnetic Switches, Level Transmitters, Floats, Indicator Rails / Measuring Scales, Accessories
Flyerpdf|2.56 MBSpecific Allocation
- Customized Ejectors
- Ejectors
- TLK-2MS 30/60-4x
- TLK-2MS 16/38-4x
- TLK-2MS 7/28-4x
- TLK-MS 11/28
- TLK-MS 5/11
- TLK-MS 15/28
- Multi Line Cooupling
- TLK-S LN2
- TLK-Si
- TLK-SH
- TLK-S
- Single Line Coupling
- ClpdV PN4
- CCV-v PN40
- CCV-v PN25
- CVV with bypass bore
- CCV PN40
- CCV PN25
- CCV without bypass bore
- CNV420
- CNV260
- CNV110
- NV420
- NV260
- NV110
- Needle Valve Standard
- CBNV25
- BNV25
- Needle Valve Bellow
- Hx-WDFV PN1000
- Hx-WDFV PN640
- Hx-WDFV PN420
- Hx-WDFV PN280
- Hx-WDFV PN320
- Hx-KDFV PN1000
- Hx-KDFV PN420
- Hx-KDFV PN320
- Hx-KDFV PN280
- PM-WDFV PN1000
- PM-WDFV PN640
- PM-WDFV PN420
- PM-WDFV PN320
- PM-WDFV PN280
- PM-KDFV PN1000
- PM-KDFV PN420
- PM-KDFV PN320
- PM-KDFV PN280
- Pneumatic Cold Valve
- Pneumatic Warm Valve
- Manual Cold Valve
- Manual Warm Valve
- Elektric Cold Valve
- Elektric Warm Valve
- PM-TxV PN6
- PM-TxV PN25
- PM-TxV PN40
- PM-TfDV PN6
- PM-TfDV PN25
- PM-TfDV PN40
- PM-WxV PN6
- PM-WxV PN25
- PM-WfDV PN40
- PM-WfDV PN25
- PM-WfDV PN6
- PM-WxV PN40
- Hx-TfDV PN40
- Hx-TfDV PN25
- Hx-TfDV PN6
- Hx-TxV PN40
- Hx-TxV PN25
- Hx-TxV PN6
- Hx-WfDV PN40
- Hx-WfDV PN25
- Hx-WfDV PN6
- Hx-WxV PN40
- Hx-WxV PN25
- Hx-WxV PN6
- EG-TfDV PN40
- EG-TfDV PN25
- EG-TfDV PN6
- EG-TxV PN40
- EG-TxV PN25
- EG-TxV PN6
- EG-WfDV PN40
- EG-WfDV PN25
- EG-WfDV PN6
- EG-WxV PN40
- EG-WxV PN6
- EG-WxV PN25
- PM-TxQV PN6
- PM-TxQV PN25
- PM-TfDQV PN25
- PM-TfDQV PN6
- PM-WxQV PN25
- PM-WxQV PN6
- Hx-TfDQV PN25
- Hx-TfDQV PN6
- Hx-TxQV PN25
- Hx-TxQV PN6
- Hx-WxQV PN25
- Hx-WxQV PN6
- EG-TfDQV PN25
- EG-TfDQV PN6
- EG-TxQV PN25
- EG-TxQV PN6
- EG-WxQV PN25
- EG-WxQV PN6

EU conformity bellow- and quad-ring valves
Bellow Valves, Quad-Ring Valves
Declaration of Conformity
EU conformity bellow- and quad-ring valves
Bellow Valves, Quad-Ring Valves
Declaration of Conformitypdf|132.99 KBSpecific Allocation
- EG-WxQV PN25
- EG-WxQV PN6
- EG-TfDQV PN25
- EG-TfDQV PN6
- EG-TxQV PN25
- EG-TxQV PN6
- Hx-WxQV PN25
- Hx-WxQV PN6
- Hx-TfDQV PN25
- Hx-TfDQV PN6
- Hx-TxQV PN25
- Hx-TxQV PN6
- PM-WxQV PN25
- PM-WxQV PN6
- PM-TfDQV PN25
- PM-TfDQV PN6
- PM-TxQV PN25
- PM-TxQV PN6
- EG-WfDV PN40
- EG-WfDV PN25
- EG-WfDV PN6
- EG-WxV PN40
- EG-WxV PN25
- EG-WxV PN6
- EG-TfDV PN40
- EG-TfDV PN25
- EG-TfDV PN6
- EG-TxV PN40
- EG-TxV PN25
- EG-TxV PN6
- Hx-WfDV PN40
- Hx-WfDV PN25
- Hx-WfDV PN6
- Hx-WxV PN25
- Hx-WxV PN6
- Hx-WxV PN40
- Hx-TfDV PN40
- Hx-TfDV PN25
- Hx-TfDV PN6
- Hx-TxV PN40
- Hx-TxV PN25
- Hx-TxV PN6
- PM-WfDV PN40
- PM-WfDV PN25
- PM-WfDV PN6
- PM-WxV PN40
- PM-WxV PN25
- PM-WxV PN6
- PM-TfDV PN40
- PM-TfDV PN25
- PM-TfDV PN6
- PM-TxV PN40
- PM-TxV PN25
- PM-TxV PN6
- Pneumatic Cold Valve
- Pneumatic Warm Valve
- Manual Cold Valve
- Manual Warm Valve
- Elektric Cold Valve
- Elektric Warm Valve

Helium Applications
Check Valves, Transfer Line Couplings, Ejectors, Bellow Valves, Quad-Ring Valves, Bättig Valves, Needle Valves, Warm Check Valves, MultiLine, SingleLine, High Pressure Valves, Cold Check Valves, Level Measurement, Accessories, Magnetic Switches, Level Transmitters, Floats, Indicator Rails / Measuring Scales, Accessories
Flyer
Helium Applications
Check Valves, Transfer Line Couplings, Ejectors, Bellow Valves, Quad-Ring Valves, Bättig Valves, Needle Valves, Warm Check Valves, MultiLine, SingleLine, High Pressure Valves, Cold Check Valves, Level Measurement, Accessories, Magnetic Switches, Level Transmitters, Floats, Indicator Rails / Measuring Scales, Accessories
Flyerpdf|10.44 MBSpecific Allocation

Locations
Locations
Your personal contact
Expert for: East Asia, Russia, India
Leon Trajber
International Sales Manager Valves & Cryogenics
Send an email+41 43 833 43 22German, English, Slovenian, Serbian, Croatian, Hungarian

Expert for: Europe, Americas, Africa
Miralem Okanovic
International Sales Manager Valves & Cryogenics
Send an email+41 43 833 43 20German, English, Croatian
