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Main & Relief Valves
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Vendor: Volvo
EC210 EC210B Relief Valve VOE14524582 14524582 EC290 EC290B Service Valve VOE14552089 14552089
Regular price $ 65 -
Vendor: Caterpillar
E345B E345C Main Relief Valve171-0060 1710060 E 345B 345C Relief Valve 1710060 171-0060
Regular price $ 128 -
Vendor: Caterpillar
E330C E320C Valve 1038177 103-8177 Main Relief Valve 103-8177 1038177
Regular price $ 98 -
Vendor: Hitachi
Control Relief Valve 4289602 AT154800 for HITACHI EX200-2 EX200-3 EX220-2 EX300-3
Regular price $ 99 -
Vendor: Caterpillar
360-4599 3604599 RELIEF VALVE FITS CATERPILLAR CAT 320C E320 E330C TRAVEL MOTOR
Regular price $ 109 -
Vendor: Caterpillar
310-0395 352-7116 171-0030 E320C E320D Main Control Relief Valve 3100395 3527116 1710030
Regular price $ 96 -
Vendor: Kobelco
0719308 Main Valve Relief Valve for SK200-6 SK230-6 SK230-6E Excavator
Regular price $ 98 -
Vendor: Hitachi
0719118 Excavator EX300-5 ZAX370 Relief Valve
Regular price $ 69 -
Vendor: Komatsu
0719116 0719117 ZAX300 Excavator Relief Valve 0719116 SK200-6 Relief Valve 0719117
Regular price $ 65 -
Vendor: Kobelco
New YN22V00001F8 Main relief valve For Kobelco SK200-6 SK200-8 SK230-6
Regular price $ 110 -
Vendor: Kato
HD820 Main Control Relief Valve for Excavator Kato
Regular price $ 139 -
Vendor: Kato
Excavator control valve parts HD800 HD900 HD1250 main relief valve 629-90100101 for kato excavator
Regular price $ 82
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.