Wafer Type Double Offset Butterfly Valve

ALIS Valves offers Wafer Type Double Offset Butterfly Valves for industrial applications requiring reliable flow isolation, efficient operation and dependable sealing performance. These valves feature a double-offset disc and shaft arrangement that positions the shaft away from the disc centre and sealing axis, helping reduce friction between the disc and seat during opening and closing. This design minimizes seat wear compared with conventional concentric butterfly valves and supports smooth operation over repeated cycles. The wafer-style body is designed to fit between compatible pipeline flanges and is secured using the specified bolting arrangement, providing a compact and space-efficient installation. Depending on the valve configuration, suitable resilient or other sealing materials can be selected to meet the required process conditions, while manual, pneumatic or electric actuators can support different operating and automation requirements.

Wafer Type Double Offset Butterfly Valves are used in water treatment plants, wastewater systems, HVAC installations, industrial water distribution, chemical processing facilities and other pipeline applications. Depending on the selected body materials, seat configuration and pressure rating, they can be specified for compatible liquids, gases and other suitable process media within their rated operating limits. Important selection factors include valve size, pressure class, operating temperature, flange compatibility, process media, body and disc materials, seat design, required leakage performance and operating torque. The selected seat material should be compatible with the process fluid and expected temperature range to ensure reliable sealing. For automated applications, actuator sizing and control system compatibility should also be considered. Selecting the appropriate wafer-style valve configuration helps support dependable shut-off, reduced sealing-surface wear and reliable long-term performance under the intended operating conditions.