Flap Valve Mechanism
The flap valve mechanism is a simple device that helps control how liquids or gases flow. It has a movable flap that swings open and closed using a hinge or pivot. When the pressure of the fluid gets high enough, the flap opens up, letting the fluid flow through. But if the pressure drops or if the fluid tries to flow back the other way, the flap shuts, stopping any backflow.
Components
- Flap: The movable part that opens and closes to allow or restrict flow.
- Hinge or Pivot: The point around which the flap rotates.
- Seal: Often made of rubber or other materials to prevent leakage when the flap is closed.
Working Principle
- Open Position: When the pressure of the fluid exceeds a certain threshold, the flap opens, allowing fluid to flow through.
- Closed Position: When the pressure drops or flows in the opposite direction, the flap closes, preventing backflow.
Double Flap Valve
Driven by a pneumatic actuator, ensure that at least one layer of the valve plate is always in a closed position.
Equipped with an electric actuator (including reducer, crank, cam, and other components), supporting variable frequency speed control.
The air locking and unloading function is achieved by the alternating action of a single valve plate.
By alternating the plate, a continuous unloading cycle is formed, enhancing the ability to resist material jamming.
Diverter Valve
The standard two way divert valve can ensure the uniform distribution of the fluid.
Multiple flow combinations can be achieved.
Allocate materials to different production lines.
Customizable for specific materials and working conditions.
Multiple Material Options to Meet Your Needs
Cast iron flap valves offer better economy and are suitable for temperatures ranging from -15℃ to 250℃.
Carbon steel flap valves perform exceptionally well in high-pressure and high-temperature scenarios.
Stainless steel (such as 304/316) is highly resistant to a wide range of acids, alkalis, and chlorides.
The Hardox 400/500 flap valve is commonly used in high-maintenance discharge systems in the building materials and metallurgy industries.
A Wide Range of Sealing Materials
Resistant to high-temperature corrosion, suitable for strong corrosive media ranging from -20℃ to 250℃.
It has excellent chemical stability and can resist corrosive media at temperatures ranging from -200℃ to 260℃.
Food-grade material, certified by FDA for food use, has strict limits on the migration of heavy metals (lead ≤ 0.01mg/kg)
Contains 12-14% chromium, providing basic corrosion resistance.
High Performance Actuators
Powered by electricity, integrating motor/gear/encoder, it can work independently without the need for auxiliary systems.
Economical in price, with rapid response (<1 second), and suitable for explosion-proof environments.
Integrating electric and hydraulic technologies, suitable for extreme conditions (high pressure/high vibration).
Advantages of Flap Valve
The flap valve is composed solely of the valve body, the flap (valve plate), the rotating shaft and the reset mechanism (gravity/weight/hydraulic spring), without any complex transmission chain.
What’s more, the driving method has been simplified. The electric/air-powered versions only require the addition of actuators without altering the basic valve body structure.
The flap valves’ plates are made of alumina ceramic material or coated with tungsten carbide, with a hardness of over HRA 88, approaching the level of diamond, significantly enhancing the resistance to particle erosion.
The flap valve is divided into three independent units: the driving module (motor/hydraulic), the valve body module (with wear-resistant liners), and the control module (intelligent PLC), which enables rapid replacement and upgrading.
Company Production Introduction
Our flap valve is widely used in various industries, primarily including: Chemical Industry, Oil and Gas, Power Industry, Environmental Protection, Building Materials, Food and Beverage…
Yes, our flap valves are non-return valves.
Flap valves are mainly used for backflow prevention and simple on/off control, while butterfly valves offer better flow regulation and versatility in various applications.
The flap valve is equipped with a universal flange interface. The valve can be sealed by symmetrically tightening the bolts without the need for special tools or complex adjustments.