Semi Lug Concentric Butterfly valves

General Applications
  • Shipbuilding, water works, heating and ventilation, power plants, oil refinery Chemical plants etc.
  • Similar as wafer type except a pair of the jack bolt hole in way of upper and lower sides for easy maintenance of adjacent pipe.
  • Easy handling and light weight.
  • Easy installation, less bolt quantity and low cost.
  • Keep liquid remained during repairing adjacent pipe.

Symmetric disc design ensures favorable flow characteristics and low pressure drop

Concentric shaft ensures low operating torque

Lining gives a good protection to valve body, and acts as flange gasket

  • Shaft penetrates the valve seat
  • Limited choice of seating materials(Elastomer, only)

Suitable for installation in Low Pressure System

Not suitable where FIRE-SAFE or FIRE-PROOF requirement apply to the valve or valve installation method