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Worm Gear Operated Signal butterfly valve

73 views Source: VALTEC China Valve Manufacture CO.,LTD

Signal butterfly valve is a special butterfly valve, which can not only control the flow in the pipeline, but also output the switch status of the valve, which is convenient for monitoring and maintenance.

The market demand for signal butterfly valves is mainly concentrated in the fields of fire protection systems, chemicals, food, and medicine. With the development of social economy and the improvement of people’s requirements for safety, environmental protection and energy saving, the application range and quantity of signal butterfly valves will continue to increase.

Worm Gear Operated Signal butterfly valve
Worm Gear Operated Signal butterfly valve

Structure and working principle of signal butterfly valve

The signal butterfly valve is composed of valve body, butterfly plate, valve stem, sealing ring, transmission device and signal device. The valve body is lined with corrosion-resistant materials such as fluoroplastics or rubber, which can adapt to various media such as strong acids, strong alkalis, salts and organic solvents. The butterfly plate has a spherical sealing surface, which cooperates with the silicone rubber gasket at the base of the valve seat to achieve good sealing performance. The valve stem and the butterfly plate are reliably connected without contact with the medium, and are easy to replace. The butterfly plate is driven to rotate 90° to open and close and adjust the flow.

The signal device is located in the transmission box and has two forms:

  1. One is equipped with two micro switches in the opening direction and the closing direction, which act when the valve is fully open and fully closed respectively, and connect the “valve open” and “valve close” indicator lights in the control room to display the valve switch status;
  2. The other is to have a close-to-close micro switch (the fully closed position of the butterfly plate is 0°), when the butterfly plate is from 0° to 40°, the micro switch outputs a “off” signal (valve is closed), 40° to 90° When in the position, output a “pass” signal (valve open). The cam of the pressing micro switch can be adjusted to display the different positions of the butterfly plate.

Signal butterfly valve has the following advantages

  • Small size, light weight, light operation, easy installation and maintenance.
  • The structure is simple and compact, and the 90° rotation opens and closes quickly.
  • The operating torque is small, labor-saving and light.
  • To achieve complete sealing, gas test leakage is zero.
  • Choose different parts materials, applicable to a variety of media.
  • The flow characteristics tend to be straight, and the regulation performance is good.
  • The number of opening and closing tests is as many as 10,000 times, and the service life is long.
  • It can replace the use of various valves such as gate valves, globe valves, plug valves, hose valves and diaphragm valves.
  • It can be combined with various driving devices to meet the needs of remote control and program control.

VALTECCN is a professional butterfly valve manufacturer and supplier. The signal butterfly valve produced has a variety of calibers, materials, connection methods and drive methods to choose from, which can meet the needs of different customers. The quality is reliable, and it is deeply trusted and praised by customers at home and abroad. VALTECCN signal butterfly valve is your ideal choice for energy saving, environmental protection and safety.

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