How to choose butterfly valve and ball valve? Engineering comparison from flow resistance, sealing to automation control

When mainly cutting off pipelines, first compare the requirements for shut-off, flow resistance, installation space, and cost, and then choose ball valves or butterfly valves. When continuous adjustment is required, the flow characteristics and pressure difference should also be evaluated, and cannot be selected solely based on the diameter or shape.

Related product columns:Butterfly valve column　Ball Valve Column　

The relationship between structure and working conditions

Butterfly valves open and close by rotating discs, with short installation length and relatively light weight, commonly used in large-diameter water, gas, and low to medium pressure differential pipelines; Ball valves switch flow paths through spherical channels, and the pressure drop of full bore structures is usually small, making them suitable for situations with higher requirements for cutting speed, sealing, and cleaning conditions. The two are not simply price substitution relationships.

Conditions that need to be jointly confirmed when selecting

First, confirm whether the medium contains particles, fibers, or easily scaling substances, as well as the normal and maximum pressure difference. For cleaning media that require low flow resistance or frequent shut-off, ball valves can be compared as a priority; When the diameter is large, the space is limited, and the medium conditions are suitable, butterfly valves are usually more economical. Temperature, pressure, and sealing material must be checked as the same set of conditions.

Boundary between control and technical communication

The automation configuration should be determined together with valve torque or operating force, fault safety status, and control mode. The switch type can choose electric or pneumatic actuators; When continuous adjustment is required, the inherent characteristics, adjustable ratio, and locator or regulating electric actuator of the valve should be confirmed. The inquiry should provide the medium DN、PN、 Temperature, connection, materials, and control signals.

Conclusion

The product column of Fouten can be used for further comparison of structure and connection form. The actual project should still confirm the final configuration with complete process data, material list, and technical agreement.