Water Butterfly valves Elephant WBV3131S-2W-W-H, body material - stainless steel AISI 304, seal - Silicon, with pneumatic actuator PA-DA-052 double action, LSU APL-510N EX

Butterfly valves are designed for use as shut-off or regulating valves for controlling flows in heat supply systems, water supply systems, in technological processes of food, chemical, oil and gas, pulp and paper and other industries. Operating principle: The valves are opened and closed by turning the disk by 90°. Opening is performed by turning the handle counterclockwise, closing - clockwise.

Pneumatic double-acting rotary actuators PA-DA-XXX and pneumatic rotary actuators with return spring PA-SA-XXX are designed for automation of industrial valve control process with maximum torque up to 2128 Nm.

The limit switch unit is designed for visual and electrical signaling of the end positions of the valve shut-off body: valve, crane or disk gate. It is mounted on top of the pneumatic actuator surface and connected to the actuator shaft in DIN standard. The sealed box usually contains two sensors that monitor the position of the actuator shaft and signalize in extreme positions. OMRON microswitches, inductive sensors or reed switches are used as sensors.

The limit switch unit is an electrical device designed to open and close the working circuit and to visualize the positions of the shut-off body of the pipeline valve. In a sealed box, as a rule, there are two mechanical switches designed for voltage up to 250 V, which monitor the position of the actuator stem and signalize in extreme positions. They are mounted on top of the actuator surface. In the upper part of the limit switch unit there is a two-color visual indicator hemisphere. If the connected pipe fitting is closed, only the red part of the hemisphere labeled CLOSED is visible; if it is open, only the yellow part labeled OPEN is visible. This visual indicator is clearly visible from a distance, which simplifies the inspection of the equipment, and the color difference between the open and closed position reduces the probability of misinterpretation of information. 
Thanks to its use, it is possible to transmit information on the position of pipeline valves (open/closed) to automated control systems, which increases the reliability of the system as a whole and simplifies diagnostics in case of malfunction detection.

Technical parameters of Water Butterfly valves Elephant WBV3131S-2W-W-H, body material - stainless steel AISI 304, seal - Silicon, with pneumatic actuator PA-DA-052 double action, LSU APL-510N EX:

Butterfly valves WBV3131S-2W-W-H, body material - stainless steel AISI 304, seal - Silicon, with pneumatic actuator PA-DA-052 double action, LSU APL-510N EX

Dimensions and dimensions of butterfly valves Elephant WBV3131S-2W-W-H, body material - stainless steel AISI 304, seal - Silicon, with pneumatic actuator PA-DA-052 double action, LSU APL-510N EX:

Sketch Butterfly valves WBV3131S-2W-W-H, body material - stainless steel AISI 304, seal - Silicon, with pneumatic actuator PA-DA-052 double action, LSU APL-510N EX

Materials of butterfly valves Elephant WBV3131S-2W-W-H, body material - stainless steel AISI 304, seal - Silicon, with pneumatic actuator PA-DA-052 double action, LSU APL-510N EX:

Sketch of parts and materials Butterfly valves WBV3131S-2W-W-H, body material - stainless steel AISI 304, seal - Silicon, with pneumatic actuator PA-DA-052 double action, LSU APL-510N EX

Technical data of DA double-acting pneumatic actuators:

DA pneumatic actuators double-acting rotary actuators

Dimensions and mounting dimensions of DA double-acting pneumatic actuators:

Sketch of dimensions of DA double-acting pneumatic actuators

Materials of parts for DA double-acting pneumatic actuators:

Material sketch of DA double-acting pneumatic actuators

Characteristics of limit switch unit APL-510N-EX: