Apollo 141/143 series butterfly valves offer an economical design that's ideal for use in industrial and HVAC / mechanical applications. These general purpose valves offer reliable performance in all types of water: hot and cold, treated and untreated and for such tasks as ON/OFF and throttling, control isolation, flow balancing and diversion.
The Norriseal Series R200 are unique, angle-disc butterfly valves available in both resilient-seated and metal-lined designs. They feature bi-directional positive shutoff to 200 psig working pressure. The angle disc provides a 360° uninterrupted differential sealing surface.