Duo-Chek® valves have long been the standard for low-pressure drop flow reversal protection. These valves are made from cast iron, cast steel, stainless steel, and a broad variety of exotic materials.


Duo-Chek offers retainerless designs to API 594 end-to-end dimensions in steel bodied wafer and lug style with a wide variety of trim materials including both metal and resilient seats. Valves come in sizes up to 88" and pressure ratings up to class 4500.

Dual Disc Check

Duo-Chek® High Performance Non-Slam Check Valves

Duo-Chek® high performance non-slam check valves are the original Mission wafer check valves introduced to the market in the late 50's

For all Duo-Chek® related inquiries, please contact:

Customer Service

North America
4526 Research Forest Drive, Suite 400
The Woodlands, Texas 77381

PHONE +1 936 271 6500
FAX +1 936 271 6510

Europe/Middle East
6 Alexander Road
Belfast, Ireland, BT6 9HJ

PHONE +44 028 9070 4222
FAX +44 028 9040 1582

146-154 Dunheved Circuit
St. Marys, Australia, 2760

PHONE +61 2 8889 0100
FAX +61 2 9673 3870


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