Weidouli Valves Co., Ltd.
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    • Pneumatic Actuated Butterfly Valve

    Pneumatic Actuated Butterfly Valve

    Pneumatic Actuated Butterfly Valve

    All pneumatic actuated butterfly valves of Weidouli are designed and manufactured in strict accordance with the latest version of API 609 specification, meanwhile our company can also meet BS5155, ANSI B 16.34, ASME SEC VIII and other major specifications, which ensures that our triple offset butterly Valve can fit in all industrial fields.

    Specification
    • Pressure rating: 150LB~300LB
    • Size range: NPS 2”~NPS 100”
    Double safe construction

    According to the specifications of API609, two independent thrust collars are installed at the lower side of the disc to prevent disc deformation, valve stem dislocation and sealing surface occlusion caused by fluid pressure and temperature, thus ensuring the normal operation of the valve in any working conditions; Meanwhile an independent valve stem ejection mechanism is designed at the lower end of the valve to prevent unexpected accidents caused by valve stem breakage or ejection.

    No dead band

    In the design process, we consider the regulation and control application, so we make the most of the sealing principle of Triple Offset Butterfly Valve to achieve that the disc does not scratch the seat and the torque of the stem is transmitted directly to the sealing surface through the disc when the valve is switched on and off, that is to say, there is almost no friction between the disc and the valve seat, thus eliminating the jump phenomenon and the inability of regulation caused by various unstable factors such as friction in the low opening range of valve, which means the dead band is eradicated. This means that our butterfly valve can enter the adjustable region from zero to 90 degrees, and its normal control ratio is more than twice that of the general butterfly valve, and the highest control ratio can be as high as 100:1.

    Laminated seat

    The valve seat is made of metal sheet and graphite sheet, which can effectively prevent the influence of small solids in the medium and the sealing surface occlusion caused by thermal expansion, ensuring that it has no leakage even if there exists minor failure.

    Replaceable Sealing Pair

    Our butterfly valve sealing pair is unique. The valve body seat can be replaced, and since the disc sealing surface and the disc are independent, the disc sealing surface can also be replaced, which means it is no longer necessary to transport damaged disc to the manufacturer or decompose the valve, just needs to replace the sealing surface of the butterfly plate. This not only greatly reduces the maintenance cost, but also greatly reduces the maintenance time as well as maintenance intensity and difficulty.

    Fire safe structure

    Our Triple Offset Butterfly Valve are fire safe desgin and have obtained the certificates of API607 and API6FA, which ensures that our Triple Offset Butterfly Valve can be used in various dangerous areas such as petroleum, petrochemical and so on.

    Super seal packing

    Traditionally, the leakage of valve seats (Internal leakage) has been the focus, while the leakage of packing parts (External leakage) has been neglected. In fact, now it is indisputable that external leakage is far more harmful than internal leakage. Triple Offset Butterfly Valve is a rotation valve, whose stem only makes 90 degree rotation. Compared with spiral multi-rotation of valve stem in gate valve and globe valve, its wear degree of packing part is lower and its service life is longer. In term of external leakage, we have adopted the highest standard design, which can guarantee the standard sealing performance below 100 ppm when conducting external leakage test in accordance with EPA21 specification.

    Hawking Metal Surface Processing Technology

    The surface roughness of the elements processed by Hawking Machine is less than Ra0.2, which improves its surface hardness and wear resistance, reduces the wear of sealing filler and the valve torque, and makes the seal of dynamic sealing part more reliable.

    Spring loaded to compensate seal automatically

    The belleville spring is used to load the connecting bolt of gland flange to prevent abnormal change of pressure and temperature in pipeline. The belleville spring can automatically compensate for and protect sealing.

    Inquiry
    Other Products
      1. Pneumatic Actuated Ball Valve
      1. Linear Control Valve
      1. Slurry Letdown And Vent Angle Control Valves
      1. Pnematic Actuated Discharge Valves
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        • Pneumatic Actuated Plug Valve
        • Pneumatic Actuated Butterfly Valve
        • Pneumatic Actuated Ball Valve
        • Linear Control Valve
        • Slurry Letdown And Vent Angle Control Valves
        • Pnematic Actuated Discharge Valves
    • Valve Materials
      1. Titanium Valves
      2. Nickel Valves
      3. Monel Valves
      4. Hastelloy Valves
      5. Inconel Valves
      6. Duplex Stainless Steel Valves
      7. Super Austenitic Stainless Steel Valves
      8. Nickel Aluminum Bronze Valves
      9. Zirconium Valves
      10. Tantalum Valves
      11. Stainless Steel Valves
    • Markets Served
      1. Water Treatment
      2. Seawater Desalination
      3. Onshore Oil & Gas
      4. Offshore Oil & Gas
      5. Liquefied Natural Gas
      6. Metallurgy
      7. Chemical
      8. Pulp and Paper
      9. Marine
    About Us
    Products
    • Ball Valves
    • Gate Valves
    • Globe Valves
    • Check Valves
    • Butterfly Valves
    • Plug Valves
    • Strainers
    • Control Valves
    Valve Materials
    • Titanium Valves
    • Nickel Valves
    • Monel Valves
    • Hastelloy Valves
    • Inconel Valves
    • Duplex Stainless Steel Valves
    • Super Austenitic Stainless Steel Valves
    • Nickel Aluminum Bronze Valves
    • Zirconium Valves
    • Tantalum Valves
    • Stainless Steel Valves
    Markets
    • Water Treatment
    • Seawater Desalination
    • Onshore Oil & Gas
    • Offshore Oil & Gas
    • Liquefied Natural Gas
    • Metallurgy
    • Chemical
    • Pulp and Paper
    • Marine
    Contact Us

    Weidouli Valves Co., Ltd.
    Add.: No.20, Xingyu Road, Airport Industrial Zone, Wenzhou City, Zhejiang Province
    Contact: Gerald Xia
    Tel.: 0086-577-86921659
    Fax.: 0086-577-86926789

    Weidouli Valves Co., Ltd.