Wafer Hard Seal Butterfly Valve

Material: Alloy steel, Stainless steel
Applicable medium: Water, air, gas, oil, and weak corrosive fluid
Driving Mode: Worm Gear
Application: used for pipelines to regulate flow or closure fluid in metallurgy, petroleum, gas and other industries.
Size: DN50-1200

Wafer Hard Seal Butterfly Valve

Wafer Hard Seal Butterfly Valve Introduction

Wafer hard seal butterfly valve is based on imported advanced technique. And it adopts fine J shape elastic seal ring and triple offset multilayer metal hard sealing structure. Applicable temperature below 425℃. It is widely used to regulate flow or closure medium in metallurgy, petroleum, power and other industries.

This Wafer hard seal butterfly valve utilizes triple offset sealing structure. The 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 to GB/T13927-92 pressure test standard.

Wafer hard seal butterfly valve Characteristics:

1. The valve adopts triple offset sealing structure which cannot cause abrasion to valve seat and disc, having a good seal.
2. Seal ring made of stainless steel combines with the advantages of the metal hard seal and elastic seal. No matter under low or high temperature, seal ring has a good seal.
3. The seal ring of the disc is overlying 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 a 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.

Wafer hard seal butterfly valve Technical Data

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

Wafer hard seal butterfly valve 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

Wafer hard seal butterfly valve Standards

Manufacturing standard JB/T 8527-97
Flange standard GB9113-2000
Face to Face standard GB12221-89
Examination standard GB/T 13927-92

Wafer hard seal butterfly valve Connection Dimensions

(unit: mm)

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℃

​Please note that the above specifications are “general specifications” that pertain to the majority of our products. These specifications should only be used for general, informational purposes. The measurement/size of the goods delivered may be different from the data in the above table, please check with us when order placed.


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