5/2 Pneumatic Interlock Valves (CV5xx Series)


Liquip’s pneumatic interlock valve provides a pneumatic interlock on interlock bars, vapour gates or API adaptors.

The CV500 is compliant with AS2809-2020 requiring No Air In Motion (NAIM) and is used to identify that a hose has been connected to an adaptor for either loading, discharge or vapour recovery.

When mounted to GC500 vapour gate, it can also form part of the
pneumatic circuit to ensure the tank truck brakes are on and the
vapour vents are open before product can flow.

Commonly mounted to the GC500 series guard bar, VCM450 vapour adaptor and API490 series adaptor.

Features & Benefits
  • 5 port pneumatic spool valve.
  • Normally closed & Normally open operation.
  • 14mm actuation
  • Heavy Duty industrial use


Recommended products for replacement

    Technical Information

    5 x ¼" BSP ports.

    Operating Pressure
    850 kPa maximum operating pressure.

    Standard Mounting to GC500 guard bar, VCM450 and API490 adaptors typically with M6 screws.


    Body: Aluminium - Spool: Stainless Steel - Seals: Premium Low Swell Buna N

    160mm x 65mm

    Temperature Range
    -40°C to +70°C

    Button can be replaced with other contacts if required such as striker plate for vapour adaptor.

    Ordering Information

    CV500: Air Valve 5 Ports with Push Button.

    Associated Equipment

    GC500 Series: Vapour Gates

    VCM450: Vapour Adaptor 4" Camlock.

    API490 Series: API adaptors.

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    CV500 Air Valve 5 Ports with Push Button.

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