Silent check valve
Silent check valve
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  • Silent check valve
  • Silent check valve

Silent check valve

Model:

H42X-10 H42X-16 H42X-25

Specifications:

DN50-DN350

Applicable temperature:

≤ 80 ℃

Applicable medium:

Water, sewage, oil


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  • Product Description
  • Detailed parameters
  • Silent check valve is mainly composed of valve body, valve seat, reverse fluid, valve disc, bearing and spring and other major parts, the internal use of streamlined design, pressure loss is very small. The opening and closing stroke of the valve is very short, and it can be quickly closed when the pump is stopped, preventing huge water hammer sound, and has the characteristics of silent closing.

    Silent check valve is mainly used for water supply, drainage, fire protection, HVAC system, can be installed at the pump outlet to prevent the media back and water hammer damage to the pump.

    Silent check valve structure principle description;

    1. When the medium flows in the specified direction, the valve flap is opened by the force of the medium; when the medium is countercurrent, the self-weight of the valve flap and the valve flap are affected by the reverse force of the medium, so that the sealing surface of the valve flap and the valve seat is closed, so as to prevent the medium from countercurrent.

    2. The sealing surface of the valve body and the valve clack is sealed with rubber.

    3. The structural length of this valve is in accordance with the provisions of the GB12221-1989, and the flange connection size is in accordance with the provisions of JB/T79-1994.

    Silent check valve is to rely on the flow of the medium itself and automatically open and close the valve flap, used to prevent the medium back flow of the valve, also known as check valve, one-way valve, reverse flow valve, and back pressure valve. Check valve is a kind of automatic valve, its main function is to prevent the medium back, to prevent the pump and drive motor reverse, and the discharge of the container medium. The check valve can also be used on the pipeline to supply auxiliary systems where the pressure may rise above the system pressure. Check valve can be divided into swing check valve (rotating according to the center of gravity) and lift check valve (moving along the axis).


    Warm tips:

    All text, data, and images in this article are for reference only. Need to see moreButterfly buffer check valveFor details of performance parameters, structural size parameters, prices, etc., or for high-quality printed samples, pleaseContact Us


     

  • Material of main components of silent check valve

    Model H42X-10 H42X-16 H42X-25
    Nominal pressure 1.0MPa 1.0MPa 2.5MPa
    Nominal diameter 50~350 50~350
    Maximum working pressure 1.0MPa 1.6MPa 2.5MPa
    Seal test pressure 1.0MPa 1.76MPa 2.75MPa
    Shell test pressure 1.5MPa 2.4MPa 3.75MPa
    Material of main parts Valve body, backflow valve body, seat, bearing, disc, shaft spring gray cast iron,ductile iron
    Aluminum bronze or chrome stainless steel
    Stainless Steel

    Silent check valve shape and connection dimensions

    DN L 1.0MPa 1.6MPa 2.5MPa
    D D1 N-d D D1 N-a D D1 N-d
    50 120 160 125 4-18 160 125 4-18 160 125 4-18
    65 150 185 145 4-18 185 145 4-18 185 145 8-18
    80 180 195 160 4-18 195 160 8-18 195 160 8-18
    100 229 215 180 8-18 215 180 8-18 230 190 8-23
    125 254 245 210 8-18 245 210 8-18 270 220 8-25
    150 267 280 240 8-22 280 240 8-22 300 250 8-25
    200 292 335 295 8-22 335 295 12-22 360 310 12-25
    250 340 390 350 12-22 405 355 12-26 425 370 12-30
    300 370 440 400 12-22 460 410 12-26 485 430 12-34
    350 400 500 460 16-22 520 470 16-26 550 490 16-34