Triple Offset Butterfly Valve

Shipman Valves offer bubble-tight shutoffs and low-running torque. They are a popular choice for power plants and chemical plants that deal with harsh chemicals. These valves are also fire-safe and resistant to high temperatures. They can withstand high-pressure levels, and their metal seats provide resilience against corrosion.

What is a Triple-Offset Butterfly Valve?

A triple-offset butterfly valve is a variation on a standard double-offset design that minimizes rubbing complications between the disc and seat. The three separate offsets designed into this valve design eliminate the squeezing problems associated with concentric butterfly valves. The first and second offsets apply to the location of the shaft center about the valve body centerline and the center line of the disc/seat sealing surfaces respectively. The third offset is the geometry of the seating surface, forming a cone shape that ensures virtually frictionless stroking throughout the entire operating cycle.

Since the valve has no cavities between the sealing components, it is more resilient to wear. This prevents debris from clogging the sealing mechanisms, thereby extending the life of the valve. In addition, the absence of cavities also helps the valve maintain a leak-proof seal against fluid pressure and temperature changes.

Like any other valve, triple-offset butterfly valves need to be properly maintained to perform reliably. They should be inspected regularly for signs of damage, such as leaks and uneven opening and closing. The maintenance strategy should be tailored to the particular application. For example, if the valve is used in an environment with changing environmental conditions, it may be necessary to inspect the butterfly valve more frequently. In addition to lubrication and inspections, the valve should be cleaned regularly, and its parts should be replaced as needed.

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