Product

pressure switch

Brand：Yibiao 型号：YLKG-16

Pressure switch is an automated control device that monitors changes in fluid pressure and outputs switch signals, widely used in industries, automobiles, firefighting, and other fields. The following is its core information:
1. Definition and classification
Mechanical pressure switch: The micro switch is triggered by the deformation of mechanical components such as diaphragms, bellows, or pistons, without the need for external power supply, and is suitable for high reliability scenarios such as petrochemicals and aerospace.
Electronic pressure switch: using monocrystalline silicon sensors and digital circuits, with an accuracy of ± 0.075%, supporting 4-20mA analog output, suitable for precision control fields such as chemical engineering and power.
Low pressure switch: specifically designed for fire protection systems, it automatically starts the pump when the pipeline pressure is below the set value. For example, the GE-208F model supports an adjustable range of 0.2-50bar.
2. Working principle
Mechanical: Pressure acts on sensing elements (such as bellows) to generate displacement, and the micro switch is turned on and off by a spring mechanism.
Electronic: The pressure signal is converted into an electrical signal by a sensor, processed by an MCU, and output as a switch or analog signal.
Fire protection application: When the pressure of the sprinkler system is lower than the water supply end, the switch will activate and feedback a signal to the alarm host, starting the fire pump.
3. Technical parameters
Range: 0.03-60MPa (mechanical), electronic pressure resistance up to 16MPa.
Accuracy: Mechanical ± 2% FS, electronic ± 0.075%.
Environmental adaptability: Operating temperature -45~130 ℃ (mechanical), protection level IP65.
4. Application scenarios
Industrial field: pressure monitoring and safety protection in petroleum, chemical, power and other industries.
Automotive system: For example, the pressure switch of the Zhijun model is located in the engine compartment to monitor the coolant or intake manifold pressure.
Fire protection system: The wet alarm valve is used for automatic pump start, and the pump start threshold needs to be set according to the static pressure value.
5. Selection and Installation
Selection criteria: It is necessary to match the medium type (gas/liquid), pressure range, output signal (switch/analog), and environmental conditions.
Installation points: The fire pressure switch should be installed vertically on the water pump outlet main pipe, and the set value should be more than 2 meters higher than the static pressure value of the high-level water tank.