Views: 0 Author: Site Editor Publish Time: 2025-12-11 Origin: Site
To adjust the pressure of the superimposed relief valve, the core is to turn the adjusting screw clockwise to increase the pressure and turn it counterclockwise to decrease the pressure. Be sure to perform the operation in stages and tighten the nut.
The specific steps are as follows:
Loosen the locking nut: Find the locking nut on the valve body and loosen it with a wrench to prepare for adjustment.
Adjust pressure: Use a wrench to hold the adjusting screw. Turn clockwise (tightening) to gradually increase the system pressure, and turn counterclockwise (loosen) to reduce the pressure. It is recommended to rotate 1/4 turn for each adjustment, then observe the pressure gauge reading, and wait for the pressure to stabilize before proceeding to the next step.
Lock Nut: After the pressure is adjusted to the required value, use a wrench to retighten the lock nut to fix the position of the adjusting screw to prevent pressure fluctuations.
Key Notes:
Step-by-step pressure increase: Do not adjust the pressure to the target value at one time. Adjust it gradually in multiple times. After each adjustment, let the system run stably for a few minutes.
Use a torque wrench: When tightening the nut, a torque wrench should be used to tighten it according to the specified torque value to ensure a reliable connection.
Maintain oil temperature: When adjusting, pay attention to the temperature of the hydraulic oil and try to control it within the range of 15-65°C. Excessive temperature will affect pressure stability.
Power-off operation: If the relief valve is electronically controlled, be sure to cut off the power supply before adjustment to ensure safety.
Adjustment principle: Change the preload force of the spring by rotating the adjustment screw, thereby changing the opening pressure of the relief valve. When the system pressure exceeds the pressure set by the spring, the valve port opens and the oil overflows back to the tank to protect the system.
