Double check detector assembly for medium hazard rated applications Flanged and roll grooved end connections


  • Compact simple design.

  • In-line and on-site serviceable.

  • No special tools required for servicing.

  • Designed and manufactured in accordance with AS/NZS 2845.1.

  • FBE coated to AS/NZS 4158.

  • Straight through flow path for maximum flow co-efficient.

  • By-pass lines have lockable ball valves for security.

  • Lifting lugs to assist with installation.

  • Top entry allows all parts to be accessed easily.

  • Stainless steel internals for superior corrosion resistance.

  • Fully restrained check valve assemblies for unrivalled safety.

  • Each valve is bench tested and tracked with unique serial number.

  • All internal components are repairable or replaceable.

  • All internal and external bolting is stainless steel.

  • Conforms to testing requirements of AS/NZS 2845.3.

  • Design conforms to all major international standards.

  • Installations can be vertical and horizontal.

  • Full bore by-pass line connection for maximum flow:

    • 40mm for valve sizes DN 65 and 80.

    • 50mm for valve sizes DN 100 and 150.

ValvCheq DCDA03

Complete with 20mm Bypass


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