1-2480
Anticavitation / Low Noise Butterfly Valves
The 1-2480 series PARCOL flanged control valves have a double eccentric disc which reduces torque requirements and seal ring wear by minimizing its contact with the disc.
Additional torque reduction is obtained by the profiled drilled integral wings of the design 1-2483.
The drilled wings of 1-2483 make the valve suitable for flow control in cavitating services on liquids and for low noise flow control on compressible fluids.
Due to the eccentric design of the disc, these valves can provide a stable flow control with limited negative gradients and excellent shut-off in closed position.
Also the flow characteristic is improved and it is close to an equal percentage shape for low openings.
The reduction of flow coefficients due to the wings is balanced by higher values of factors FL, xT and xFZ which allow the use of this valves for high pressure drop and angular travel up to 80° on liquid and gas services.
For more critical service a special execution with extended wings and angular travel up to 100° is available.
Available with body in A216 WCB, AISI 316, AISI 316L, A890 4A duplex stainless steel and size upto 80 inches is widely used in desalination plants.
