The Advantages and Installation & Maintenance Methods of Butterfly Check Valves

    The butterfly check valve refers to a valve that automatically opens and closes its disc based on the flow of the medium itself, used to prevent the backflow of the medium. It is also known as a non-return valve, a one-way valve.

Check valves, and back pressure valves. Check valves are a type of automatic valve, primarily used to prevent backflow of media, prevent pumps and driving motors from reversing, and release the media in the container.

Check valves can also be used on the piping that supplies auxiliary systems, where the pressure may rise above the system pressure.

The Butterfly Check Valve is primarily used at the pump discharge in industrial water supply and wastewater treatment plants. It prevents backflow of the medium in the pipeline, automatically eliminates destructive water hammer, thereby ensuring that the pumps and pipelines are not damaged.

The Butterfly Check Valve is primarily composed of the valve body, valve disc, cushioning device, and微量调节阀. The Butterfly Check Valve features a novel structure, compact size, low fluid resistance, smooth operation, reliable sealing.

The H47X, HH47X, HH47H, H47XF, and HDH47X butterfly check valves, with features such as wear resistance and excellent cushioning performance, are the perfect choice for industrial water use and urban wastewater discharge.

The advantages of the butterfly check valve mainly include the following aspects:

 ‌1. Innovative structure and compact sizeThe butterfly check valve's design allows for a relatively compact size, making it easy to install and maintain.

  2. Low fluid resistance:The valve design minimizes fluid resistance loss, making it suitable for high-flow fluid control applications.

  3. Operation Stability:The valve operates smoothly, reducing vibrations and noise during operation.

 ‌ 4. Sealed ReliabilityThe sealing surfaces of the valve bodies and valve discs are made using stainless steel surfacing, ensuring excellent sealing performance and suitability for applications requiring stringent sealing.

 5. Abrasion Resistance:Valves boast excellent wear resistance, extending their service life.

 6. Excellent buffering performance:By utilizing the damping effect of the slow-closing hydraulic cylinder, the valve closes slowly during the shutdown process, effectively preventing destructive water hammer phenomena.

‌Installation Method for the Butterfly Check Valve

  Installation Location:Butterfly check valves should be installed on horizontal pipelines to ensure their reliability in use. For check valves with a diameter of DN<80mm, they can also be installed on vertical or upward-sloping pipelines.

  2. Installation Steps:Position the butterfly check valve between the flanges of the two pipes, then secure the ends of the pipes together with bolts, locking the butterfly check valve in place.

Maintenance Methods for the Butterfly Check Valve

 ‌ Regular InspectionsRegularly inspect the sealing surface and valve disc of the butterfly check valve to ensure proper operation. If damage to the sealing surface or failure of the valve disc to close properly is detected, timely replacement or maintenance is required.

 ‌ 2. Cleaning and Maintenance:Before installation, the valve cavity should be cleaned to ensure there is no dirt adhered. Do not use metal or hard objects for cleaning to avoid damaging the sealing surface.

  3. Lubrication and Adjustment:During operation, if the closing speed is too fast or too slow, it can be controlled by adjusting the oil amount in the heavy hammer or the damping cylinder.

Common Faults and Solutions for Butterfly Check Valves

 Internal LeakIn the event of a local leak, adjust the pressure plate screws to increase the protrusion of the sealing ring for sealing. If leakage occurs at the valve stem, adjust the seals at both ends.

  2. External Leak:If the "O" ring seal becomes aged and fails, a new seal must be replaced.