The Series 30/31 resilient seated butterfly valves represent precision-engineered flow control solutions designed for demanding industrial applications. These valves feature robust construction with sizes ranging from 2 to 20 inches (50mm to 500mm) and are available in both wafer and lug body styles to accommodate various installation requirements. Engineered to operate within a broad temperature spectrum from -20°F to 400°F (-29°C to 204°C), they deliver reliable performance across diverse environmental conditions. The valves achieve bidirectional bubble-tight shut-off up to 175 psi (12 Bar) with a cold working pressure rating of 250 psi (17.2 Bar) for the valve body, ensuring leak-proof operation and maintaining system integrity under varying pressure demands.

These butterfly valves find extensive application across multiple industrial sectors where fluid control is mission-critical. Water and wastewater treatment facilities utilize them for potable water distribution, sewage handling, and various treatment processes requiring precise flow management. Chemical processing plants benefit from their corrosion-resistant material options when handling aggressive fluids, solvents, and process chemicals. Marine and offshore operations employ these valves in seawater cooling systems and ballast water management. Commercial HVAC systems in large buildings rely on them for temperature regulation and fluid control, while general industrial applications use them for process water, cooling systems, and various fluid transfer operations that demand reliable performance.

The Series 30/31 valves deliver exceptional value through their proven reliability, extended service life, and operational efficiency. Their durable construction minimizes maintenance requirements and reduces system downtime, leading to lower total cost of ownership over the product lifecycle. The bubble-tight shut-off capability prevents product loss and ensures process integrity, while the bidirectional pressure rating provides installation flexibility in various system configurations. The availability of multiple material options allows for optimal compatibility with specific operational needs, enhancing system performance and reliability. These valves comply with industry standards and are trusted by professionals for applications where failure is not an option, providing peace of mind and operational consistency.

Key Features:
- Available in 2-20 inch sizes (50mm-500mm) with wafer and lug body styles
- Operating temperature range from -20°F to 400°F (-29°C to 204°C)
- Bidirectional bubble-tight shut-off to 175 psi (12 Bar) pressure rating
- Multiple body materials including cast iron, ductile iron, carbon steel, and aluminum
- Various seat material options including BUNA-N, EPDM, FKM, and polyurethane

Benefits:
- Reliable performance across diverse temperature and pressure conditions
- Reduced maintenance requirements and lower total cost of ownership
- Leak-proof operation ensuring process integrity and preventing product loss
- Installation flexibility with bidirectional pressure rating and multiple body styles
- Material compatibility options for optimal performance with specific media