NIBCO butterfly valves provide high-performance service for heating and cooling and fire protection systems. They are available in a wide range of sizes with wafer lug, grooved, or press end connections.
NIBCO butterfly valves eliminate the potential for leaks versus a standard cartridge-style liner with their industry-leading molded-in liner (up to 12").
Butterfly valves provide bi-directional dead-end service in commercial and industrial applications, offer many maintenance-free cycles, and still provide “bubble tight” shut-off.
Factors to Consider When Choosing a Butterfly Valve
- Operating Life – NIBCO butterfly valves provide maintenance-free cycles and “bubble tight” shut-off for the long life of the valve.
- Pressure Drop – Excessive pressure drops contribute to increased energy costs. Valves sometimes add to pressure drop. Other factors that affect pressure drop include the flow area of piping, friction loss against pipe walls, and change of flow direction via fittings. The flow characteristics of butterfly valves are three times better than globe valves and approximately 75% of an equivalent gate valve.
- Versatility – Butterfly valves are superior in versatility compared to gate or globe valves and can be used for on/off service and throttling/balancing. They also have a more comprehensive range of chemical resistance due to the trim options and choice of elastomeric liners.
- Ease of Operation – Butterfly valves have a 1/4 turn (90°) open to close. Gate and globe valves require multiple turns to open and close. The ease of opening or closing a butterfly valve means they can employ less expensive operators.
- Weight – Using lightweight butterfly valves instead of heavyweight cast iron valves can save installation dollars. For example, a 10" butterfly may weigh 55 pounds, whereas a 10" iron gate may weigh 490 pounds. This can be a significant cost saving when calculated over an entire system.
- Physical Size – Butterfly valves take up approximately a sixth of the space of a gate valve.
- “Bubble Tight” Shut-Off – Resilient seated butterfly valves are “bubble tight” by design. Gate and globe (metal to metal) valve seats cannot provide “bubble tight” shut-off.
- Cost – A butterfly valve is generally 40% the cost of an iron gate valve with both a low initial cost and a low installation.
- Maintenance – Properly installed butterfly valves are virtually self-cleaning and less susceptible to failure due to trash material in the line.