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Detail Specification for Wafer & Lug Butterfly Valve 

The valve is ideal for throttling or shutting off the flow of corrosive or incorrosive gases, liquids, semi-liquids and solid powder, and can be installed in pipelines or on vessels in the industries of petroleum processing, chemicals food, medicine, textile, paper making, hydroelectricity engineering, ship building, water supply and sewage, metallurgy, energy engineering as well as light industry etc.

  • Small in size and light in weight. Easy installation and  maintenance. It can be mounted wherever needed.
  • Simple and compact construction, quick 90 degrees on-off operation. Minimized operating torque, energy saving.
  • Long service life, Standing the test of tens of thousands opening/closing operations.
  • Bubbles-tight sealing with no leakage under the pressure test
  • Wide selection of materials, applicable for various medium.


butterfly valve construction parts

Item NO. Name of Part  Performance Feature
01 Check Ring Provides prevention of blow out of shaft
02 O-ring Provides prevention of outside dust
03 Body Precision Cast Iron Body or Ductile Iron Body, According with various connection standards
04 Bush Furnishes stem support for positive stem alignment and actuator support
05 Seat Bonded to body or inserted
06 Disc Provides double-tight shut-off and assures minimum torque and longer seat life
07 Stem Ensures dependability and positive disc positioning, blow out proof design stem
08 Splinted (Tapered pins) Ensures positive shaft to disc connection, convenient for field replaceable, furthermore, Using of splint reduces possibility of leakage through disc and shaft

Technical Data

Nominal Diameter 50(2")-2000(80") 50(2")--1000(40") 40(1 1/2")-2000(80")
Nominal Pressure 1.0 Mpa 1.6Mpa 0.6Mpa
Test Pressure Shell 1.5Mpa 2.4Mpa 0.9Mpa
Sealing 1.1Mpa 1.76Mpa 0.66Mpa
Working Temperature -15--------- +150
Suitable Mediums Fresh/Sewage/Sea Water, Gas, Vapor, Food, Medicine, Oils, Acids, Alkalis Salt, etc

Butterfly Valve

Butterfly Valve Overview
Hard sealed Type
Flanged Type
Grooved End Butterfly Valve
Antiseptic Butterfly Valve

Material of parts
Definition of CV Value

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Butterfly Valve Wafer check valve Balance valve Gate Valve Globe Valve Ball Valve Y Strainer Flange Pipe fitting

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