The valve discs and seals of the ZSHWE/ZAJWE series triple-offset butterfly valves adopt a unique triple-offset structure, characterized by compact design, excellent shut-off performance, and long service life. They possess both regulating and cut-off functions and are widely used in industrial sectors such as chemicals, electric power, textiles, food, pharmaceuticals, and papermaking, as well as in municipal engineering and pipelines in water plants. They are suitable for cutting off or regulating the flow of media including tap water, sewage, oily liquids, air, coal gas, natural gas, and water vapor.

The nominal pressure ratings for this series of products are PN (MPa) 0.6, 1.0, 1.6, 2.5, 4.0 (150lb, 300lb); the valve bore range is DN80–1200 (3"–48"); suitable for temperatures ranging from -60 to +450°C. With multi-layer sealing, they achieve bidirectional zero leakage; when fully metal-sealed, they reach Class V leakage, with flow characteristics approximating equal percentage.

Features

The valve body is manufactured using integral casting technology, resulting in a compact structure, small volume, and light weight.

The valve disc is installed with a triple offset. When closed, the valve disc expands outward to achieve optimal peripheral sealing; when opened, the valve disc rapidly disengages from the seal ring, effectively preventing seal ring wear.

The seal ring design is innovative, simple, and maintenance-free.

The seal ring is a multi-layer metal seal, suitable for harsh working conditions.

Due to the triple-offset structure, the operating torque is significantly reduced.

The flow resistance is low, and the nominal flow coefficient is large, approximately three times that of a same-bore seat valve.

They possess strong self-cleaning capability and long service life.

The valves can adopt flanged or wafer-type structures.

Standard actuators (pneumatic piston type and electric) are interchangeable