Wafer Hard Seal Butterfly Valve

Wafer Hard Seal Butterfly ValveClick to view the big picture
Short Description
 Model No.: D73H    Hits: 1355
China Wafer Butterfly Valve manufacturer Xinhai offers Wafer Hard Seal Butterfly Valves in Alloy Steel, Stainless Steel, JB/T 8527-97, DN50-2000.

Key Specifications / Features

Wafer hard seal butterfly valve, based on imported advanced technique, adopts fine J shape elastic seal ring and triple offset multilayer metal hard sealing structure. Applicable temperature belows 425℃. It is widely used to regulate flow or closure medium in metallurgy, petroleum, power and other industries. The valve utilizes triple offset sealing structure. Valve seat and disc made of stainless steel with different hardness, have good corrosion resistance and long service life. The valve has bi-directional sealing, according with GB/T13927-92 pressure test standard.
Characteristics of wafer hard seal butterfly valve
1. The valve adopts triple offset sealing structure which cannot cause abrasion to valve seat and disc, having good seal.
2. Seal ring made of stainless steel, combines with the advantages of metal hard seal and elastic seal. No matter under low or high temperature, seal ring has good seal.
3. The seal ring of the disc is overlay with STL, with abrasion resistance and long service life.
4. Large size butterfly valve, utilizing lattice structure, has high strength, large flow area and small flow resistance.
5. The valve has bi-directional seal. It can be installed at any position without the limitation of medium flow and space.
6. Actuating device adopts multistage installment which is convenient to use.
Technical parameter
Nominal diameter DN(mm) 50~2000
Nominal Pressure PN(MPa) 0.6 1.0 1.6 2.5
Seal test(MPa) 0.66 1.1 1.76 2.75
Strength test(MPa) 0.9 1.5 2.4 3.75
Applicable temperature Carbon steel: -29℃~425℃; stainless steel: -40℃~650℃
Applicable medium Water, air, gas, oil and weak corrosive fluid
Leakage rate GB/T13927-92
Driving mode Manual, worm gear, pneumatic, electric
Components materials
Components  Materials 
Valve body WCB, alloy steel, stainless steel, QT450-10
disc WCB, alloy steel, stainless steel, QT450-10
Valve shaft 2Cr13 stainless steel, alloy steel
Seal ring Stainless steel
Packing Flexible graphite
Manufacturing standard JB/T 8527-97
Flange standard GB9113-2000
Face to Face standard GB12221-89
Examination standard GB/T 13927-92
  Connection dimensions
Nominal diameter(DN) Dimensions Flange sizes & bolt specifications
1.0MPa 1.6MPa 2.5MPa
L L2 H H1 D1 Z-D A D1 Z-D A D1 Z-D A
50 43 265 350 112 125 4-18 90℃ 125 4-18 90℃ 125 4-18 90℃
65 46 265 370 115 145 4-18 90℃ 145 4-18 90℃ 145 4-18 90℃
80 49 320 380 120 160 8-18 45℃ 160 8-18 45℃ 160 8-18 45℃
100 56 320 420 138 180 8-18 45℃ 180 8-18 45℃ 190 8-22 45℃
125 64 340 460 164 210 8-18 45℃ 210 8-18 45℃ 220 8-26 45℃
150 70 390 555 175 240 8-22 45℃ 240 8-22 45℃ 250 8-26 45℃

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