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Dual Plate Check Valves

The QC series check valve is also known as an upstream, non-return, backpressure, or one-way valve; it is installed in support of automatic shutdown valves and safety devices. The main purpose is to prevent and protect the backflow medium against the consequences of unintended reverse flow.

Product Range

Rating Class 150 to 300 JIS 10K to 20K
Size 2” to 24”
Temperature 550°C, 1022°F
Leakage Rate API 598
Design Code API594

Long-Leg Spring

The long leg spring action allows plates to open and close smoothly without seat scrubbing. This allows valves to be easily opened by low pressure.

Retainer-Less Design

The QC series dual plate check valve has either a retainer-less design or screwed body plug, which allows zero emission. This design eliminates the potential leak path to the atmosphere. In addition, its design not only enables the valve to be disassembled quickly without the use of force or special tools but also makes it easy to do maintenance work.

Hinge Support Sleeve

The specially designed hinge support sleeve offers reduced friction and self-arrangement plates. Stable sealing performance and long life duration are also achieved through the hinge support sleeve.

Compact Design

The QC Series dual check valve can be designed to have a short wafer-type body. Customized face – to – face dimensions are also available.