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Main & Relief Valves
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Vendor: Sany
Relief Valve XKAH-00122 for Hyundai Excavator R160LC-7 R170W-7 R180LC-7 R250LC-7 R290LC-7
Regular price $ 109 -
Vendor: HYUNDAI
Main Relief Valve XJBN-00163 for Hyundai Excavator 210LC-7 R210LC-7
Regular price $ 118 -
Vendor: Sany
Excavator Spare Parts 60100500 Main Relief Valve for Kawasaki 52081001-9126
Regular price $ 79 -
Vendor: Caterpillar
448-5704 Relief Valve for CAT 374D
Regular price $ 398 -
Vendor: Caterpillar
568-3725 5683725 Relief Valve Diesel Engine Parts Fits CAT E345D E349D
Regular price $ 168 -
Vendor: Caterpillar
Relief Valve 5152707 515-2707 Fit For Caterpillar E349D2 Excavator
Regular price $ 149 -
Vendor: Caterpillar
New Main relief valve 527-1720 568-3724 for CAT E320 323 325 326 330 336GC GX 349D2 345D 349E 352 349F Secondary gun relief valve 5683724 5271720
Regular price $ 198 -
Vendor: Caterpillar
6I-6899 6I6899 Main Control Relief Valve for 3066 3116 3126 3306 Engine 320 320L 320N 320S 322 322L E320 325 330 Excavator Overflow Valve Spare Parts
Regular price $ 198 -
Vendor: Caterpillar
352-7113 107-7033 Relief Valve For CAT 320D 324D 329D 330D 336D
Regular price $ 168 -
Vendor: Caterpillar
Hydraulic Main Relief Valve 171-0031 306-4599 for E320B E330C E320C Excavator
Regular price $ 108 -
Vendor: Caterpillar
E320D Relief Valve 352-7122 352-7123
Regular price $ 89 -
Vendor: Caterpillar
116-3601 Relief Valve 1163601 for 320B 320C 325BL 330BL Excavator 2111B-40184
Regular price $ 108
How does a main & relief valves work?
1. The function and working principle of the excavator main gun
The main gun of the excavator is one of the main control valves in the hydraulic system of the excavator. It mainly controls the working pressure and flow of the hydraulic system. The setting of the main gun can not only generate sufficient working pressure for the hydraulic system, but also control the flow of hydraulic oil to ensure the normal operation of each component and the normal operation of the excavator.
The working principle of the main gun is: when the hydraulic pump starts to work, the hydraulic oil will be pressed into the main gun, flowing inside the main gun to generate a high-pressure oil flow, and then sent to the hydraulic motor and other hydraulic components through pipes. Since the main gun has a certain built-in regulating valve, the high-pressure oil flow can be adjusted as needed to meet the needs of different working conditions.
2. The function and working principle of the auxiliary relief valve of the excavator
The auxiliary relief valve of the excavator is a relief valve in the hydraulic system of the excavator. It mainly plays the role of preventing overload of the hydraulic system and protecting system components from damage. When hydraulic oil flows through the auxiliary relief valve, if the system's working pressure exceeds the set value, the valve will automatically open and slowly release the excess hydraulic oil back to the tank, thereby protecting the hydraulic components from damage.
The working principle of the auxiliary relief valve is: when the working pressure of the hydraulic system exceeds the set value, the steel balls and springs separate, and the hydraulic oil will flow back to the tank through the channel in the valve. By adjusting the tightness of the spring, the valve opening pressure can be controlled to adapt to different working needs.
In short, the excavator main gun and auxiliary relief valve are important components in the excavator hydraulic system. They mainly play the role of controlling the pressure and flow of the hydraulic system, ensuring the normal operation of the hydraulic system and protecting system components from damage.