Series 31H lug-style resilient seated butterfly valve is drilled and tapped to meet ASME Class 125/150 and PN16 flanges. The durable, high strength one-piece stem design utilizes an efficient internal disc to stem connection.

Series 31H valves provide a primary and secondary seal between the disc and seat, as well as the stem and seat, ensuring the total encapsulation of line media with zero external leakage.