Lug Type Metal Seated Butterfly Valve

ALIS Valves offers Lug Type Metal Seated Butterfly Valves for industrial applications requiring durable flow isolation and dependable performance under demanding pressure and temperature conditions. These valves feature a rotating butterfly disc and metal-to-metal seating arrangement designed to provide robust sealing performance in applications where conventional soft seats may not be suitable. The lug-style body incorporates threaded lugs around the valve body, allowing secure bolting to compatible pipeline flanges. Depending on the valve design and installation requirements, this arrangement can facilitate maintenance and may allow downstream piping to be disconnected while the valve remains secured to the upstream flange, provided the valve is rated for end-of-line service. The body, disc and metallic sealing surfaces can be selected according to the process media and specified operating conditions, with manual, pneumatic or electric actuation options available depending on the configuration.

Lug Type Metal Seated Butterfly Valves are used in power generation plants, oil and gas facilities, refineries, petrochemical industries, steel manufacturing, chemical processing and other industrial pipeline systems. Depending on the specified materials, pressure rating and temperature limits, they can be selected for compatible liquids, gases, steam and certain high-temperature process media. Important selection factors include valve size, pressure class, operating temperature, flange compatibility, process media, body and disc materials, metal seat construction, allowable leakage rate and operating torque. Metal-seated designs may have different shut-off performance from resilient-seated valves, so the required leakage class should be confirmed during selection. For automated applications, actuator sizing and control system compatibility should also be evaluated. Choosing the correct valve configuration helps support reliable isolation, resistance to seat wear and consistent performance under the intended working conditions.