
In industrial piping systems, ensuring backflow prevention while maintaining material integrity is critical. GMK’s latest Dual Plate Check Valve is engineered specifically for demanding environments that require superior corrosion resistance and durability.
Exceptional Material Specifications
The core of this valve is its CD4MCU body. This duplex stainless steel provides significantly higher strength and better pitting resistance than standard 316 stainless steel. To ensure the highest quality, every valve undergoes strict PMI (Positive Material Identification) testing before shipment, as shown in our workshop inspections.

Valve Key Technical Features:
Size & Pressure: 8″ 300LB (Ideal for high-pressure industrial flow).
Disc: 4A (Duplex steel) for high structural integrity.
Hard-Facing Seat: Stellite 6, providing excellent wear and erosion resistance at the sealing surface.
High-Strength Spring: Inconel 600, ensuring reliable closure and long cycle life even in high-temperature applications.
The compact, wafer-style design of the dual plate check valve not only saves space but also reduces water hammer, making it a preferred choice for modern chemical processing and desalination plants.