It can detect, display, alarm and control signal output of medium pressure signals to ensure the normal operation of the system. In practical applications, pressure controllers can be classified and selected according to specific applications. Common ones can be divided into two categories: mechanical and electronic. There are many types of mechanical pressure switches, and there are many types of electronic pressure switches. Now commonly used Pressure controller< /strong>It is a gas pressure controller. The gas pressure controller is a component used in the traveling brake system of engineering machinery to control the driving brake and keep the air pressure at 0.70Mpa to meet the driving control requirements.
How the pressure controller works:
When controller products are manufactured, each product has its own specific working pressure range (range). Within this range, customers can pre-set the pressure at which the switch needs to work. value, this value is also called the set point of the pressure switch. After being connected to the system, when the pressure of the measured medium is greater (less than) the set point, the sensor generates a step signal, triggering the micro switch inside the controller to open (close) the system loop. The controller is usually equipped with a SPDT micro switch. Each SPDT switch can be set to the normally closed or normally open state. When set to the normally open state, when the micro switch acts, the system loop will be closed. Normally closed state is to disconnect the system loop.
The pressure controller can be used for neutral or corrosive gases and liquid media. The setting value range is adjustable from 0.02 to 42Mpa, and the switching difference is unadjustable. The pressure controller uses a metal 316L diaphragm sensor, which can be used for neutral oil, gas media and water. The setting value of the controller is adjustable, and the adjustment range is -0.1 ~ 40MPa.
Pressure controller terms and definitions:
1. Pressure controller pressure switch: When the input pressure reaches the set value, it controls and alarms the controlled pressure through the on-off function of the output contact. meter.
2. Pressure control range: the pressure range that the controller can control.
3. Set point (value) set point: the input pressure value at which control or alarm is expected to occur.
4. Switching value: The input measured when the output changes from one state to another during the upstroke (or downstroke) of the position control instrument. value.
5. High-switching value: When the input pressure rises, the controller will generate a pressure value when the control or alarm signal changes.
6. Low-switching value: When the input pressure drops, the controller generates the pressure value when the control or alarm signal changes.
7. Switching difference differential gap: the difference between the upper switching value and the lower switching value at the same set point.
8. Set point deviation set point error: When the output variable is output according to the specified requirements, the difference between the set value and the measured actual value.
9. Set point range: A controller with an adjustable set point. The difference between the maximum pressure value and the minimum pressure value that can be adjusted by the set point. .
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