Industrial Butterfly Valves
Industrial Butterfly valves play a critical role for flow control applications in process heating. Marshall W. Nelson & Associates specializes with industrial flow control butterfly valves, understanding various types of butterfly valves, and how they are applied in flow control applications. These applications are typically for flow modulation or for manual flow trimming functions. Review these various types of industrial butterfly valves in this article, or simply contact us to discuss your specific application needs.
Operation of Industrial Butterfly Valves
Industrial butterfly valves are commonly used to control the flow of the gas. Industrial butterfly valves feature a disc in the center of the valve. This disc has a rod that passes through the body to an actuator on the outside of the valve to control the rotation of the disc. In summary, industrial gas butterfly valves are the most common devices to control the flow of air, natural gas and propane in industrial combustion applications.
Industrial Butterfly Valves - Links
Common Sizing Questions
Questions
Pipe Size?
Flow Rate and Type of Gas?
Environment?
Approval Needed?
Application Type?
Typical Answers
2″ NPT
1000 CFH, Natural Gas
Indoors or Outdoors
UL
Manual or Automatic
Do you have a low or high pressure flow control application need with integral butterfly valve in gas valve train assembly?
Industrial Butterfly Valves Design and Control
There are different design specifications for industrial butterfly valves based on gas types, pressures, flows and usages. For low flow or high turndown applications, valves may be selected with a reduced port size. For high flow systems, it is important to choose your industrial butterfly valve with only enough pressure drop for good control.
In common operations the disc can rotate up to 90 Degrees to close the valve. The disc can be opened incrementally either manually to throttle flow, or an actuator can be utilized to adjust the flow automatically. In either case, the objective is flow control whether manually with a mechanical stop or automatically with an actuator. It is important to size the butterfly valve properly to obtain optimum control of the flow. The resolution of the actuator is also critically important for tight flow control applications.
Shop for Industrial Butterfly Valves used with Actuators
Actuators used with Industrial Butterfly Valves
These examples above illustrate linkage and direct coupled (linkageless) mounting arrangements for actuators. Direct coupled mounting arrangements for actuators provide more accurate control, they are easier to setup, and they provide fewer failure points where linkages can become loose.
All actuators are not created equal. They can vary in torque, speed, accuracy, NEMA ratings and temperature limitations. The higher the resolution of the actuator, the more repositions there will be in travel in the butterfly valve. The more repositions an actuator has, the tighter the flow control can be which can have a significant effect on your process performance.
Manual Controls used with Industrial Butterfly Valves
Manually controlled industrial butterfly valves are commonly used to limit, balance or trim flow.
Shop for Industrial Butterfly Valves used with Manual Control
View all our industrial butterfly valves on our website, and purchase with our online store
If you can’t find the product you are looking for, simply contact us and we will help you find a solution for your application. We are here to help.
At Marshall W. Nelson & Associates, we have been providing customer and engineering support for all types of industrial applications since 1958.
