Working Principle
FRPP check valves rely on the pressure of the media to open and close. When the media pressure at the inlet is greater than at the outlet, the media pressure overcomes the spring resistance, pushing the valve core and opening the valve, allowing the media to flow smoothly. When the media pressure at the inlet is lower than at the outlet, the spring pushes the valve core against the valve seat, closing the valve and preventing backflow.
Product Advantages
Excellent Corrosion Resistance: Resistant to most acids, alkalis, salts, and organic solvents (except strong oxidizing acids), making it ideal for corrosive media transport systems.
Lightweight and High-Strength: Thanks to glass fiber reinforcement, its strength and rigidity are far superior to ordinary PP valves, resulting in greater pressure resistance and a longer service life.
Reliable Sealing: Utilizing a conical or spherical sealing design, aided by the spring or its own weight, it effectively prevents backflow of the media, providing excellent sealing performance.
Low fluid resistance: Especially for swing and ball check valves, the flow path is unobstructed and pressure loss is low when opening.
Easy installation: Typically uses flange or butt-welded connections, offering good compatibility with FRPP piping systems and quick installation.
Low maintenance costs: Simple structure, low failure rate, and long service life in applicable media.
Optional hygiene: For use in food, pharmaceutical, and other industries, food-grade raw materials can be used.
Application areas
FRPP check valves are widely used in systems transporting fluids such as water, air, oil, and corrosive chemical liquids, such as pure water and drinking water piping systems, drainage and sewage piping systems, brine and seawater piping systems, and acid, alkali, and chemical solution systems.
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