Flange Center Plate Butterfly Valve

Technical Parameter

Pressure range:CLASS150~CLASS600 (PN6~PN16)

Nominal diameter:NPS2"~120"(DN50~DN3000)

Body material:Carbon steel, Stainless steel, Duplex stainless steel, Alloy steel, Ductile iron

End connection:Flange

Temperature range: -40℃~120℃

Drive type:Worm gear device

Design standard:API 609,AWWA C504,GB/T12238,GB/T13927




Product Detail


Product Structure Features

1.Driving device:Can be equipped with a handle, worm gear, electric or pneumatic control device.

2.Bushing:Reduce the rotational torque, support the stem, and make it separate from the body effectively, reduce the wear of the valve stem.

3.Surface of disc axle hole:After polishing treatment, with the seat precision.

4.High precision disc external profile:To achieve zero leakage requirements of air tightness test. The opening and closing torque is small, prolong the service life of the seat.

5.Stem seal:Stem seal is not easy to deform, thereby avoiding the usual stem leakage.

6.Strong precision key:The utility model has the advantages of high precision and high strength, and is suitable for the installation of the handle and other control devices.

7.Precision taper pin:The utility model is characterized in that the valve rod and the valve plate are firmly connected with the valve plate, and the utility model has the characteristics of anti vibration and easy replacement.

8.Integral stem design:High precision, high reliability, easy to control the opening and closing of the valve plate.

9.Body lined with rubber seat:Good overall stability, stable, tensile, anti leakage.

10.O-ring:Auxiliary shaft end leakage.


The main technical parameters

    Nominal diameter    DN(mm)    50~2000
    Nominal pressure    PN(MPa)    0.6    1.0    1.6
    Test pressure    Strength test    0.9    1.5    2.4
    Seal test    0.66    1.1    1.76
    Air tightness test    0.6    0.6    0.6
    Applicable media    Air, water, sewage, steam, gas, oil, etc.
    Drive form    Manual, worm and worm gear drive, pneumatic drive, electric drive


Material of main parts

Part Name    Material
Body    All kinds of rubber, PTFE
Disc    Grey cast iron, nodular cast steel, cast steel, stainless steel and special materials
Sealing ring    Ductile cast steel, cast steel, alloy steel, stainless steel
Stem    2Cr13, stainless steel
Packing    O-ring, flexible graphite


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Main dimensions and weight (PN1.0/1.6MPa)

DNLDD1D2bfN-d0AKEFHH1H2Φ2N-d1
501081651251021834-Φ18180655013833382812.64-Φ7
651121851451221838-Φ18180655013933582812.64-Φ7
801142001601382038-Φ182456550131004132812.64-Φ7
1001272201801582038-Φ182409070131144282815.774-Φ10
1251402502101882238-Φ182409070131254442818.924-Φ10
1501402852402122238-Φ223509070131435532818.924-Φ10
20015234029526824312-Φ22350125102131706783822.14-Φ12
25016540535532026312-Φ26550125102131987423828.454-Φ12
30017846041037828412-Φ26600125102202238033831.64-Φ12
35019052047043830416-Φ26600150125202708664531.64-Φ14
40021658052549032416-Φ30600175140203009405133.154-Φ18
45022264058555040420-Φ30750175140203409955137.954-Φ18
50022971565061044420-Φ337501751402235510585741.124-Φ18
60026784077072554520-Φ367502101653041011637050.634-Φ22
70029291084079540524-Φ367503002543047812836663.358-Φ18
800318102595090042524-Φ397503002543052913986663.358-Φ18
90033011251050100044528-Φ391250300254345841498118758-Φ18
100041012551170111546528-Φ421500300254343571608142858-Φ18
120047014851390133052532-Φ4815003502983479918761501058-Φ22