Male vent couplers for LNG tank venting

Male quick disconnect vent valves, also known as "MQDV", allow fast and simple connecting and disconnecting of fuel lines with reduce product loss. They are commonly installed into LNG tanks for simplified re-fuelling where they interlock with their female counterparts for optimal service.

product image of a male qdv valve

Product description

The combined functionality of these valves eliminates manual closing and bleeding off trapped gas. At disconnect positive shut-off is activated and only a small amount of gas exits into the atmosphere.

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Inlet body: Stainless steel
Body: Stainless steel
Seat: PTFE
Spring: Stainless steel
Cap (optional): Vinyl

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Gas types: LNG (Liquefied Natural Gas)
Connections: Thread
Type: SAE J514 (37˚ Flare JIC)
Refuelling pressure: Up to 34 bar (500 psi)
Burst pressure: Greater than 103.5 bar (1,500 psi)
Capacity: 189.27 lpm (50 gpm)
Temperature range: -195˚C to +60˚C (-320˚F to +140˚F) 
Sizes and range: 1"
Series available: LNG specific
Standards: ATEX, CE, ISO 12617, ISO 16924

*Materials and specifications are subject to generalisation. Our experienced people are ready to help you find the correct fit for your application. 

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  • Economical and time saving device
  • Positive safety-stop for added protection
  • Macro line compatible
  • Ball bearing guide and locking mechanism
  • Freeze-up prevention
  • Easy maintenance
  • 100% factory tested 

Did you know?

The male QDV's are available with different pipe connections

Factory authorized CryoMac® 3 exchange service is available upon request

Get in touch!

Whether you already know what you need, or you would like the opinion of an expert, we are always ready to help you out.