Product details

BUTTERFLY VALVE LUG - TYPE WITH LEVER (UNI/DIN/BS)

Flanged butterfly valves – lever type (UNI/DIN/BS) are butterfly valves with a lug-type design, fixed to the pipe flange with bolts, and operated by a lever. This type of valve is common in water supply systems, HVAC, wastewater treatment, and many industrial applications due to its simplicity, ease of operation, and good sealing performance.

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Basic Concept

Lug Type Butterfly Valve: Features lug-style flanges with threaded holes, allowing bolts to be fastened directly to the pipeline flanges.
Lever Handle: Operated manually with a lever, suitable for small to medium valve sizes.
Connection standards: UNI/DIN/BS/ANSI/JIS – ensuring compatibility with many international systems.
Applications: Water supply systems, HVAC, wastewater treatment, chemical industry, food industry.

Technical Specifications

Nominal size (DN): DN40 – DN300 (lever handle typically used for smaller DN sizes)
Working pressure (PN): PN10, PN16, PN25
Operating temperature: -10 °C to 120 °C (depending on seat material: EPDM, NBR, PTFE, Viton)
Valve body: Cast iron, ductile iron, carbon steel, stainless steel, epoxy-coated
Disc: Ductile iron, stainless steel (SS304/316), bronze, aluminum alloy
Shaft: Stainless steel (410/420/431/304/316)
Sealing seat: EPDM, NBR, PTFE, Viton, Hypalon
Pressure test:
- Shell: 1.5 × rated pressure
- Seat: 1.1 × rated pressure
Operation mechanism: Lever handle (for small DN), gearbox or electric/pneumatic actuator (for larger DN)