• Valve Categories

    • Double Eccentric Flanged Butterfly Valve SB42

    DN

    100~2400 (4"~96")

    PN

    0.6~2.5 (Class150)

    Temperature Range

    -20℃~110℃

    Connection

    Flanged

    Installation Direction

    Bidirectional

    Design

    GB/T12238, BS EN593, API609

    Face to Face

    GB/T12221, BS EN558-1

    Flange Drilling

    GB/T9113, ASME B16.5, EN1092, GOST12820, GOST33259, DIN2501

    Top Connection

    ISO5211, GOST55510

    Inspection

    GB/T13927, ISO5028, API598, JB/T9092

    Body Materials

    GGG40, GGG50

    Disc Materials

    GGG40, GGG50, GGG50+EPDM, CF8, CF8M, Duplex Stainless Steel

    Stem Materials

    420, 431, 304, 316

    Seat Materials

    EPDM, NBR

    Features & Benefits

    The stem axis of SB42 double eccentric butterfly valve deviates from the center of disc and body. The friction between the disc and seat is small, so its longer service life and better stability is ensured.

    Double Eccentric Flanged Butterfly Valve SB42

    Yoke under actuator can be selected, which alllows to install gear box, electric or pneumatic actuators accoridng to different standards.

    Packing material PTFE (or reinforced graphite) can effectively enhance the sealing performance of the stem. In order to reduce the openning & closing toque and make the operation more labor-saving, the bearing can be selected.

    Bearings can be selected to reduce the stem torque. Different materials can be selected according to the working conditions.

    One-piece structure, more reliable reinforced body & better pressure bearing capacity. Its material can be selected according to the medium. Double eccentric structure reduces the opening & closing torque, reduces wear, improves the service life of the seat, and greatly reduces the degree of scratching. Different face-to-face dimensions can be selected. The coating of the body is epoxy powder with the thickness of more than 250 microns.

    Different types of disc can be selected according to the DN and PN. The disc has higher strength and is not easy to deform. The hollow structure in the middle of the turtle back makes the water flow smooth and the resistance is small when the valve is opened. More than DN600 are suitable for turtle back disc. The surface of the disc is painted by epoxy powder, which has better anti-corrosion performance. Stainless steel disc can be also selected.

    It is replaceable and its material can be adapted to the medium. L-shaped or T-shaped sealing ring is more firmly fixed.

    The surface of seat can be welded with stainless steel to increase the wear resistance and service life, ensure the close fit with disc and achieve zero leakage.

    According to different diameters, different positions will be designed on the disc, with different numbers of pins nailed to firmly connect with the valve stem, ensuring synchronous rotation of the disc and stem.

    Bearings can be selected to reduce the stem torque. Different materials can be selected according to the working conditions.

    Yoke under actuator can be selected, which alllows to install gear box, electric or pneumatic actuators accoridng to different standards.

    Packing material PTFE (or reinforced graphite) can effectively enhance the sealing performance of the stem. In order to reduce the openning & closing toque and make the operation more labor-saving, the bearing can be selected.

    Bearings can be selected to reduce the stem torque. Different materials can be selected according to the working conditions.

    One-piece structure, more reliable reinforced body & better pressure bearing capacity. Its material can be selected according to the medium. Double eccentric structure reduces the opening & closing torque, reduces wear, improves the service life of the seat, and greatly reduces the degree of scratching. Different face-to-face dimensions can be selected. The coating of the body is epoxy powder with the thickness of more than 250 microns.

    Different types of disc can be selected according to the DN and PN. The disc has higher strength and is not easy to deform. The hollow structure in the middle of the turtle back makes the water flow smooth and the resistance is small when the valve is opened. More than DN600 are suitable for turtle back disc. The surface of the disc is painted by epoxy powder, which has better anti-corrosion performance. Stainless steel disc can be also selected.

    It is replaceable and its material can be adapted to the medium. L-shaped or T-shaped sealing ring is more firmly fixed.

    The surface of seat can be welded with stainless steel to increase the wear resistance and service life, ensure the close fit with disc and achieve zero leakage.

    According to different diameters, different positions will be designed on the disc, with different numbers of pins nailed to firmly connect with the valve stem, ensuring synchronous rotation of the disc and stem.

    Bearings can be selected to reduce the stem torque. Different materials can be selected according to the working conditions.

    Industry Options

    MaterialsCharacteristicsLow Temp. ℃High Temp. ℃Recommended ℃
    NRHigh elasticity-2085-5~70
    NBROil resistivity-30100-15~90
    EPDMAging resistance, ozone resistance, corrosion resistance-40125-25~110
    FPM (Viton)Chemical and most oils resistance, (except ketones & esters)-20200-5~150
    MVQ (Silicon)High and low temperature resistance, oil, corrosion resistance-55200-30~180

    Dimensions

    Double Eccentric Flanged Butterfly Valve SB42's Drawing

    EN1092-2 PN16

    DNL (13)L (14)DD1D2bfn-Φd
    1501402102852402111938-23
    20015223034029526620312-23
    25016525040035531922312-28
    30017827045541037024412-28
    35019029052047042926416-28
    40021631058052548028416-31
    45022233064058554830420-31
    50022935071565060931420-34
    60026739084077072036520-37
    70029243091084079440524-37
    800318470102595090143524-41
    90033051011251050100147528-41
    100041055012551170111250528-44
    120047063014851390132857532-50
    140053071016851590153060536-50
    160060079019301820175065536-57
    180067087021302020195070536-57
    200076095023452230215075548-62
    2200800100025552440236090552-62
    2400850110027652650257096556-62

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