| Model： | ||
| Standard or Nonstandard： | Standard |
|
| Pressure： | LowPressure |
|
| Material： | Casting |
|
| Media： | Water |
| PriceRange： | ||
| Structure： | Butterfly |
|
| Power： | Pneumatic |
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Cast iron butterfly valve has taken good advantages of both the cast iron valve and the butterfly valve. It means that the valve is made up of cast iron. And it affects well just like the other common types of the butterfly valve. The cast iron butterfly valve is widely employed for the flow control with its high reliability.
It is able to withstand the clear water or with some turbidity up to 5000ppm under 45 degree. And for other fluids, the maximum pressure and temperature should be controlled according to the IS: 14846. Besides, in terms of some specified cast iron butterfly valves, special design has been given to avoid the limitation of working pressure.
Definitely, the cast iron butterfly valve holds its own outstanding and unique features. Firstly, it is the rigid and sturdy design with minimum loss of head across the valve. Then, the valve is able to achieve the perfect interchangeability of components assured parallelism between side flanges. Besides, there are assured equal taper between wedge faces and perfect machining and pressing of body and wedge rings. What else, the finish on spindle threads is excellent resulting in low friction and smooth operation of valves. Therefore, the service life has been guaranteed.
Cast iron butterfly valve, as one type of the specified butterfly valves, is regarded as the rotary valves because they use radial motion to open and close. Commonly, many types of the cast iron butterfly valve are controlled by levers that only require a 90° turn. With the rotation within 90 degree, the cast iron butterfly valve can act well just like a throttle valve or a stop valve.
When the actuator is turned the disc is rotated and fits tightly in the seal. The disc is moved because the actuator is connected to the shaft that holds it in place. Therefore, the cast iron butterfly valve is also regarded to be bubble tight which means that no liquid or gas can pass through the closed valve. Some valves in great diameter have crank wheels that need to be rotated at least once, which greatly minimizes the risk of accidental operation and allows the valve to be opened or closed in increments.
Cast iron valves that are located in hard to reach areas can be operated electronically by a machine that turns the actuator when it receives a signal or command to do so. Torque limitations and ratings are very important to how much power is required to close the valve. It is required to enable that the stem is not damaged by over tightening. Cast iron butterfly valves may be double or triple offset in order to meet the various demands of the pipe line. For example, the disc may be mounted eccentrically to provide a seal that can withstand very high temperatures and pressure
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