Product details

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

Clamp-type butterfly valves – lever type (UNI/DIN/BS) are wafer-type butterfly valves (clamped between two flanges) operated by a lever. These valves are simple, compact, easy to install and remove, and are commonly used in water supply systems, HVAC, wastewater treatment, and many industrial applications.

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Basic Concept

Wafer Type Butterfly Valve: Designed to be clamped directly between two pipeline flanges and secured with bolts.
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)