A pressure relay is an element in a hydraulic system that moves the electrical contact when the fluid pressure reaches a predetermined value. The pressure relay can also be defined as the hydraulic components that convert the pressure into an electrical signal. According to the customer's own pressure design needs, they can adjust the pressure relay to realize the function of output a power signal at a certain set pressure.
The pressure relay can realize the control and protection of the pressure, allowing the equipment to maintain a stable pressure range in the process of working, thus improving the efficiency and life of the equipment. Pressure relay is mainly used to monitor and control the pressure of gas or liquid. It can realize the following functions:
1. Pressure protection: when the system pressure exceeds the preset safety value, the pressure relay will automatically cut off the circuit, so as to avoid the damage or danger to the system, and play a protective role.
2. Pressure control: the pressure relay can automatically adjust and control the pressure value inside the system by controlling the switch or regulating the valve, so as to keep it within a safe and stable range.
3. Alarm prompt: When the pressure in the system is abnormal or exceeds the preset range, the pressure relay will send a warning signal to remind the operator to take measures in time.
4. Automatic control: The pressure relay can be integrated with other equipment and systems to realize automatic control and monitoring, and improve production efficiency and safety.
The adjustment methods of the pressure relay are mainly as follows:
1. Manual adjustment: adjust the pressure threshold of the pressure relay through the manual knob, generally suitable for small pressure relays.
2. External damping adjustment: by adjusting the external damper, change the stiffness of the pressure relay internal spring, so as to change its action pressure, suitable for high precision and stability requirements.
3. Deformation tube adjustment: to control the action pressure of the relay by changing the shape variable of the pressure deformation tube of the relay, which is suitable for situations requiring high precision and stability, such as precision instrument control.
4. Relay valve body adjustment: adjust the valve body structure inside the relay, change its pressure transfer mode, so as to change its action pressure, suitable for the larger pressure relay.
It should be noted that the adjustment of the pressure relay should be carried out under strict quality control management, and follow the relevant operating procedures and standards to ensure the accuracy and stability of the adjustment results.