Swing Check Valve is mainly composed of Body, Cover, Seat, Disc, Rocker, Pin, Bracket and Other parts.It is an Automatic Valve used to prevent the backflow of the medium on the one-way flow Pipeline, mainly relying on the pressure of the pipeline medium flow to open or close the valve by itself. It is a more commonly used Valve. Swing Check Valve in the Pipeline fluid medium is more clean and more suitable, not suitable for viscosity or containing solid pull conditions, otherwise it will lead to the Check Valve switch is not sensitive, can not achieve a complete seal, the fluid check is not firm. The medium of the Swing Check Valve is one-way flow, which can effectively prevent the backflow of the medium to prevent accidents.

Working Principle：

When the Disc of the Swing Check Valve is connected with the Rocker and Rotates around the Pin Shaft at a certain Angle, the medium in the Pipeline flows in the specified direction (from Left to Right), and the Disc is pushed away from the Valve Seat, indicating that the Inlet pressure is higher than the Outlet pressure, and the Valve is in the open state. When the pressure difference between the two sides of the disc decreases to a certain value, the disc falls back to the closed state. When the pressure on the right side of the valve disc is higher than the pressure on the left side, it indicates that the fluid flows in the reverse direction. At this time, the force generated by the pressure difference on both sides compacts the valve disc on the seat, and the fluid cannot pass through, indicating that the medium cannot flow back. Therefore, the greater the fluid pressure of the swing check valve, the tighter the sealing surface will be, and the better the sealing effect will be.

Feature：

• Valve disc design: Round or oval valve disc more flexible opening and closing
• The valve stem is the center of the valve disc rotation, and the shaft seal can prevent fluid leakage along the valve stem, using packing or mechanical seal
• The support structure of the valve disc ensures that the valve disc is more stable in operation and prevents deviation due to fluid pressure
• The guide mechanism ensures the precise guidance of the disc during rotation, reduces wear and prolongs service life

Material:

• Carbon Steel: ASTM A216 WCB, ASTM A216 WCC, ASTM A217 WC6, ASTM A217 WC9, ASTM A217 C5, ASTM A217 C12A, ASTM A352 LCB, ASTM A352 LCC
• Stainless Steel : ASTM A351 CF8, ASTM A351 CF8M, ASTM A351 CF3M, ASTM A351 CF8C CN3MN, CK3MCUN, ASTM A351 CN7M, ASTM A890 4A (CD3MN), ASTM A890 5A (CE3MN), ASTM A890 6A (CD3MWCuN)
• Aluminium Bronze: ASTM B148 C95800, ASTM B148 C95500

Applicable Media:

• Drainage system: The swing check valve is used to prevent the occurrence of water hammer when the pump stops in the urban water supply and sewage treatment system.
• Chemical industry: Swing check valve is used to prevent harmful gas or liquid counterflow, protect equipment and personnel safety.
• Hvac system: Swing check valve is used to prevent condensate backflow and protect the normal operation of the system.
• Marine industry: Swing check valves are used to prevent seawater flow back and protect the ship's propulsion system.