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Professional On Off Butterfly Valve Manufacturer

  • Open and close quickly and labor-saving
  • Small fluid resistance
  • Simple structure, small volume, light weight
  • Good adjustment performance
  • Good sealing performance
  • Wide range of applicable media

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    BCST your Expert On Off Butterfly Valve Supplier in China

    Choosing BCST butterfly valve is choosing an efficient and reliable fluid control solution. It not only improves productivity and reduces energy consumption, but also reduces maintenance costs and extends the service life of the equipment. Make your industrial production smoother and more efficient!

    BCST your One-Stop Onoff Butterfly Valve Solution in China

    The efficient performance of BCST butterfly valves can significantly improve the productivity of an organization. Its fast response and precise adjustment make the fluid flow in the pipeline smoother, reducing the risk of energy waste and production interruption. At the same time, the butterfly valve’s high-quality sealing performance effectively prevents fluid leakage, ensuring the safety and stability of the production environment.

    Electric on off butterfly valve

    Electric On Off Butterfly Valve

    Pneumatic On off Butterfly Valve

    Manual on off Butterfly Valve

    Manual On Off Butterfly Valve

    BCST Your Best Supplier for On Off Butterfly Valve

    BCST is a professional manufacturer with 20 years of experience in globe valves, control valves, butterfly valves, ball valves, gate valves, and valve accessories, similar to selectors and positioners. BCST is a registered global brand, substantially concentrated on instrumentation and control valves.


    We supply a one-stop result for inflow dimension and control result. BCST has cooperated with transnational brands like Rotork, Siemens, ABB, and China National Petroleum Corporation. Our products are exported to over 100 countries worldwide.

    BCST has enough raw materials in stock and professional technical staff that can quickly realize your unique requirements. In addition, BCST has over 20 times of product history and ten times of export experience. BCST gives you the best result for butterfly valves.

    Welcome to send us an inquiry.

    Pneumatic Butterfly Valve1

    BCST On Off Butterfly Valve Quality Control

    • Technical software calculation
    • Technical team meeting
    • CAD drawing confirmation
    • Measurement


    • Installation
    • Calibration
    • Chemical Analysis
    • Mechanical Propery
    • dimension Checks
    • Visual Checks
    • Non-destruction Examination

    Hydrostatic Test

    • Shell test
    • Sealing test
    • Leakage test
    • Air test
    • Function test
    • CNC machining
    • Visual checks
    • Dimensional checks
    • Liquid penetration test

    Outlook Treatment

    • Surface Polish
    • Painting
    • Visual inspection
    • Thickness checks
    • Visual checks
    • Liquid penetration
    • Test
    • Hardness test
    • Lapping
    • Dimensional checks


    • Marking
    • Exported wooden box

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    Why Purchase On Off Butterfly Valve From BCST

    On Off Butterfly Valve -FAQ

    Butterfly valves, as crucial fluid control devices, may encounter some common issues during practical use. Here are some of the frequently encountered problems and their corresponding solutions:

    1. Seal Face Leakage

    Problem Cause:

    1.Debris trapped between the disc and the seal ring.
    2.Uneven or insufficient tightening of the flange bolts on the outlet side.
    3.Incorrect pressure testing direction.


    1.Clean the interior of the valve to eliminate debris, ensuring that the disc and seal ring are free from impurities.
    2.Inspect and adjust the tightening force of the flange bolts to ensure uniform compression.
    3.Conduct pressure testing in accordance with the specified direction to ensure effective sealing.

    2. Leakage from Both Ends of the Valve

    Problem Cause:

    1.Failure of the sealing gaskets on both sides.
    2.Uneven or insufficient tightening of the pipe flange.


    1.Replace the failed sealing gaskets, ensuring that the gaskets meet quality requirements.
    2.Check and adjust the tightening force of the pipe flange to ensure uniform and sufficient compression.

    3. Insensitive Operation

    Problem Cause:

    1.Stuck sealing face.
    2.Faulty transmission device.


    1.Inspect and clean the sealing face to eliminate sticking issues.
    2.Inspect the transmission device to ensure it functions properly, and repair or replace it promptly if any faults are found.

    4. Loud Noise

    Problem Cause:

    Excessively high fluid velocity or unstable operation.


    1.Reduce fluid velocity by adjusting the valve size or installing flow restrictors.
    2.Inspect and adjust the transmission device to ensure stable valve operation.

    5. Leakage Current

    Problem Cause:

    1.Conductive substances present in the leaking liquid.
    2.Electrical grounding issues.


    1.Clean the leaking liquid to avoid contamination by conductive substances.
    2.Inspect the electrical grounding system to ensure proper grounding, and promptly repair any faults.
    Additionally, to ensure the smooth operation and extended lifespan of butterfly valves, it is crucial to follow these guidelines:

    1.Before installation, confirm that the product performance and flow direction arrow align with the operating conditions to avoid incorrect installation.
    2.Regularly inspect the tightness of all connection parts to maintain sealing performance and the smooth rotation of the valve stem.
    3.For butterfly valves with frequent opening and closing, regularly inspect and replace the lubricating grease to ensure the smooth operation of the worm gearbox.

    By following proper installation procedures, correct usage, and timely maintenance, common issues encountered during the use of butterfly valves can be effectively avoided and resolved, ensuring stable operation and long-term durability.

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