Unox Nickel Disc Lug Type Butterfly Valve with EPDM Seal

What is a Lug Type Butterfly Valve?

Lug type butterfly valves operate by rotating a disc, made of nickel-plated, stainless steel, or various materials (AISI304, AISI316, AL-BR), which is fixed around a central shaft. The disc rotates around this shaft to perform opening and closing actions. The disc, sealed with a rubber or plastic gasket, controls the start, regulation, or complete stop of liquid or gas flow. These valves feature a quarter-turn motion around their axis and a sealing gasket, making them suitable for stopping, regulating, or starting flow.

How Does a Lug Type Butterfly Valve Work?

Lug type butterfly valves are designed with protruding lugs around the body that align with the bolt holes on the flange where they will be installed. The valve is mounted between two flanges using bolts, studs, and nuts. This design prevents the valve from being removed from only one side of the piping system. In addition to manual operation, pneumatic and electric actuators can be installed for automated control.

The valve is placed between pipe flanges and secured by flange bolts surrounding the valve body. It is easy to install but cannot be used as an isolation valve. Manual control is possible, and pneumatic or electric actuators can be added for automated operation.

Product Features

• Body: GGG-40 Ductile Iron

• Disc: GGG40.3 Nickel-Plated Ductile Iron

• Shaft: AISI 420 Stainless Steel

• Seal: EPDM

• Maximum Operating Temperature: 120 ºC

• Operating Pressure: PN16 (DN25 – DN300)

• Coating: Electrostatic Powder Coating

• Connection: Lug Type TS EN 1092-2

Applications of Butterfly Valves

• Heating, ventilation, and air conditioning (HVAC) systems

• Water treatment and distribution systems

• Mining industry

• Shipbuilding and drilling facilities

• Food and chemical industries

• Fire suppression systems

• Water, seawater, dust, gas, wastewater, and air systems