Butterfly valve WBV3131E-2W-W-H with pneumatic spring-return actuator

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 DNOVA pneumatic double-acting rotary actuators PA-DA-XXX and pneumatic rotary actuators with return spring PA-SA-XXX are designed for automation of industrial valves control process with maximum torque up to 2128 Nm.
Limit switch unit is designed for visual and electrical signaling of end positions of the valve shut-off body: valve, tap or disk gate. It is mounted on top of the pneumatic actuator surface and is connected to the actuator shaft in DIN standard. The sealed box usually contains two sensors, which monitor the position of the actuator shaft and signalize in extreme positions. OMRON microswitches, inductive sensors or reed switches are used as sensors.
Limit switch unit is an electrotechnical device designed to open and close the working circuit and to visualize the positions of the shut-off body of pipeline valves. 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. Due to the use of the limit switch unit it becomes possible to transmit information on the position of pipeline valves (open/closed) to automated control systems, which allows to increase the reliability of the system as a whole and simplifies diagnostics in case of malfunction detection.

Technical characteristics of butterfly valves DNOVA WBV3131E-2W-W-H food grade stainless steel 304, seal - EPDM, with pneumatic actuator DNOVA PA-SA-XXX and limit switch unit DNOVA APL-410N EX:

Technical data of pneumatic rotary actuators with return springs DNOVA PA-SA-XXX:

Technical characteristics of explosion-proof limit switch units DNOVA APL-410N EX:

Overall and installation sizes of butterfly valves DNOVA WBV3131E-2W-W-H food grade stainless steel 304, seal - EPDM, with pneumatic actuator DNOVA PA-SA-XXX and limit switch unit DNOVA APL-410N EX:

Dimensions and mounting sizes of rotary pneumatic actuators DNOVA with return springs PA-SA-XXX:

Dimensions and installation sizes of explosion-proof limit switch units DNOVA APL-410N EX:

Materials of butterfly valves DNOVA WBV3131E-2W-W-H food grade stainless steel 304, seal - EPDM, with pneumatic actuator DNOVA PA-SA-XXX and limit switch unit DNOVA APL-410N EX:

Construction of rotary pneumatic actuators DNOVA with return springs PA-SA-XXX: