Control valves use contactless magnetic switches WEF-QG. Control valves use contactless magnetic switches WEF-QG, also known as position feedback switches, diaphragm valve magnetic control switches, pneumatic valve position switches. Widely used on diaphragm valves and all peripheral pneumatic equipment. This product can be used well in any part where mechanical travel switches can be used. Performance characteristics: 1. This product adopts a magnetic excitation mutual control method to collect the conduction or disconnection of the contact points of the capture unit, without mechanical collision, so it has no wear, simple structure, convenient installation and debugging, and maintenance is less than 95% of mechanical travel switches (mechanical, micro, proximity, infrared), reducing the labor intensity of maintenance. 2. The chipset mutual control technology used in this product ensures that the contact points of the capture unit will still have a working state maintenance function (over travel maintenance function) after being connected or disconnected. Its breakthrough point is to make up for the previous use of mechanical, micro moving, proximity, and infrared travel switches, which require accurate installation to ensure that the contact points can be connected; Or the shortcomings of disconnection. 3. This product is a passive product and does not require an additional power supply to function. It is also a dry contact, without voltage reduction, without loss, and can be directly connected in series to the circuit for convenient wiring. 4. This product has three synchronicities, namely, the LE reality carried by the product is synchronized with the local control cabinet indicator light, synchronized with the computer window instructions in the control room, and synchronized with the internal contacts connected or disconnected* Even if the LE light on the product itself is damaged, its internal contacts will still work. 5. LE display, convenient and intuitive, allowing for remote viewing of device operation status. 6. The capture unit adopts a sealed structure, which is waterproof, dustproof, and has strong capabilities, suitable for various harsh environments. Technical parameters: 1. Working voltage C12-250V, AC12-250V2, working current> 200mA<= 1A, if greater than 1A, can be made separately. 3. Working temperature -40 degrees Celsius+150 degrees Celsius 4. Small position resolution of 3mm 5. Contact fatigue strength greater than 200000 times (contact on/off times) Application range: Power generation enterprise Application location: Auxiliary control: Diaphragm valves, butterfly valves, ball valves, and all peripheral pneumatic equipment in the chemical water production workshop. (such as on the cylinder of the ash bin, magnetic flap level gauge, etc.) Furnace control: inlet and outlet of the coal mill separator, hot and cold wind speed cut-off valve, pebble coal, soot blower, oil control valve, coal mill oil station oil level gauge, turning gear, etc. Mechanical control: drain valve, extraction check valve, original flue gas inlet and outlet baffle, etc; Coal transportation: Application areas for petrochemical enterprises such as coal mills: water production workshops, polymerization workshops, etc. This product can be used well in any part where mechanical travel switches can be used. Troubleshooting: