Design Features:

APCO Double Door Check Valves by DeZURIK are designed to automatically prevent back-flow in systems where it is desirable to permit flow in one direction and prevent flow in the opposite direction. Double door check valves are recommended for clean liquids and gasses and have an excellent performance reputation in refineries, petrochemical, gas liquefaction, other process industries and HVAC applications because of their cost-efficient design and non-slam properties.

The low weight and short laying length of the CDD Double Door Check Valve saves initial cost, requires less space, and is easier to install when compared to full-body, swing-type check valves. Although this valve is light in weight, it is capable of heavy duty, continuous operation. APCO carbon steel and stainless steel CDD Double Door Check Valves meet ASME/API 594 face-to-face dimensions and ASME B16.5 Flange Dimensions.

Double Door Check Valves (CDD) Specifications

2-36” (50-900mm); larger sizes available on application

Body Materials:
Ductile Iron
Carbon Steel
Stainless Steel
Other materials available on application

Pressure Ratings:
Class 150 for lugged valves,
Class 150/300 dual rated for 2-6” (50-150mm) wafer valves
Class 150 for 8” (200mm) and larger wafer valves