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Main & Relief Valves
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Vendor: Komatsu
Relief Valve 723-10-12300 7232064200 Fits Komatsu PC75 PC78 723-20-64200
Regular price $ 149 -
Vendor: Komatsu
723-10-16600 7231016600 Relief Valve For Komatsu PC40MR-1 PC40MR-2 PC45MR-1 PC45MR-3 PC50MR-2 PC55MR-3 PC55MR-5 PC57-7 PC58UU-3 Excavator
Regular price $ 148 -
Vendor: Komatsu
723-10-41200 7231041200 Relief Valve; For Komatsu PC45MR-3 PC55MR-3 Excavator
Regular price $ 109 -
Vendor: Komatsu
EXCAVATOR 723-10-12400 7231012400 RELIEF VALVE ASSY for PC18MR PC20MR PC22MR PC26MR
Regular price $ 89 -
Vendor: Komatsu
723-40-91500 Relief Valve For Komatsu Excavator PC200-7 PC200-8 Main Valve
Regular price $ 79 -
Vendor: Komatsu
Relief Valve 723-10-12800 For Komatsu PC45MR-3 PC55MR-3 PC40MR-1 PC50MR-2
Regular price $ 72 -
Vendor: Hitachi
Service Relief Valve 4308965 for Hitachi EX120-2 EX120-3
Sale price $ 79Regular price $ 109 -
Vendor: Hope Backhoe Parts
6754-72-1220 Overflow Pressure Limit Relief Valve For Komatsu PC200-8 Excavator
Regular price $ 60 -
Vendor: Hope Backhoe Parts
723-40-71900 Pressure Relief Valve For Komatsu PC220/300-8 Excavator Valve Part
Regular price $ 120 -
Vendor: Hitachi
Main Relief Valve 4228354 for Hitachi EX200 EX200-1 EX220-3 EX300-2 EX300-3
Regular price $ 82 -
Vendor: Komatsu
6745-71-4330 Fit Excavator Relief Valve Limiter PC300-8 PC350-8
Regular price $ 52 -
Vendor: Komatsu
Relief Valve 723-40-50200 For Komatsu Excavator PC200-6 PC210-6 PC220-6 PC230-6
Regular price $ 129
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.