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    3/4" Flanged Diaphragm Valve, UPVC/ CPVC

    $135.99
    2 way PVC diaphragm valve is widely used in water treatment, chemical processing and pharmaceuticals, with 3/4 inch (DN20) flanged port. Low price manual diaphragm valve is available in UPVC and CPVC body material, PTFE diaphragm, best for flow and liquid control.
    *
    SKU: ATO-FDV-DN20
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    ATO flanged PVC diaphragm valve uses a flexible PTFE diaphragm that separates the valve's body from the flow path. This diaphragm is made of CPVC or UPVC which can withstand corrosive or acidic substances.

    Specification

    Model ATO-FDV-DN20
    Size 3/4 inch (DN20)
    Structure Type Flanged Type
    Diaphragm Valve Assembly Parts Material
    Diaphragm PTFE
    Film EPDM
    Valve Body UPVC, CPVC
    Valve Plate UPVC, CPVC, Steel, Stainless Steel
    Cover Limit AS
    Stud Steel, Stainless Steel
    Retaining Nut FRPP
    Washer FRPP
    Wheel Alloy Material
    Platen Steel, Stainless Steel
    Double-Headed Stud and Nut Steel, Stainless Steel
    Bonnet UPVC, CPVC
    Yoke Nut Ht300 Steel
    Stem Steel, Stainless Steel


    Dimension (Unit: mm)

    Flanged PVC diaphragm valve dimension DN15 ~ DN100

    Size Valve Body Material d D L h n-φ
    3/4 inch (DN20) UPVC 76 102 135 19 4-φ14
    CPVC 76 102 135 19 4-φ14

    Note: The above dimensions are for reference only, please refer to the actual product.

    Detail

    Flanged diaphragm valve detail

    Working Pressure

    Size Working Pressure (MPa)
    UPVC CPVC
    20~40℃ 41~60℃ 61~80℃ 0~40℃ 41~60℃ 61~90℃
    1/2" (DN15) 0.8 0.8 0.7 0.7 0.7 0.6
    3/4" (DN20) 0.8 0.8 0.7 0.7 0.7 0.6
    1" (DN25) 0.8 0.8 0.7 0.7 0.7 0.6
    1-1/4" (DN32) 0.7 0.7 0.6 0.7 0.7 0.6
    1-1/2" (DN40) 0.7 0.7 0.6 0.7 0.7 0.5
    2" (DN50) 0.7 0.7 0.6 0.7 0.7 0.5
    2-1/2" (DN65) 0.7 0.7 0.6 0.7 0.7 0.5
    3" (DN80) 0.7 0.7 0.6 0.7 0.7 0.5
    4" (DN100) 0.7 0.7 0.6 0.7 0.6 0.5
    5" (DN125) 0.5 0.5 0.4 0.5 0.5 0.4
    6" (DN150) 0.5 0.5 0.4 0.5 0.4 0.3
    8" (DN200) 0.3 0.3 0.2 0.5 0.3 0.25
    10" (DN250) 0.3 0.3 0.2 0.3 0.3 0.2

    Tips: Difference between a bellow valve and a diaphragm valve

    A bellow valve and a diaphragm valve are both types of control valves used in various industrial applications, but they differ in their design and operation.

    A bellow valve utilizes a flexible metal bellow, which expands and contracts in response to pressure changes. When pressure increases, the bellow compresses, causing the valve to close, and when pressure decreases, the bellow expands, allowing the valve to open. Bellow valves are known for their ability to provide a tight seal and are commonly used in applications requiring high precision and reliability.

    A diaphragm valve relies on a flexible diaphragm, usually made of rubber or elastomeric material, to control the flow of fluids. When pressure is applied to the diaphragm, it deforms and obstructs the flow path, closing the valve. Releasing pressure allows the diaphragm to return to its original shape, opening the valve. Diaphragm valves are often preferred for applications where a non-contaminating, zero-leakage solution is required, such as in the pharmaceutical and food industries.

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