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Main & Relief Valves
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Vendor: Hitachi
Relief Valve 4372039 Fits for Hitachi EX200-5 EX200-3 EX300-3 EX200-2 excavator
Regular price $ 52 -
Vendor: Komatsu
6D95 Main Control Relief Valve 723-40-50100 for PC200-6 Excavator
Regular price $ 98 -
Vendor: volvo
Fits Volvo EC210 EC210B Excavator Relief Valve VOE14513267 14513267
Regular price $ 99 -
Vendor: Komatsu
Relief Valve 723-46-48100 for Komatsu PC200 PC210 PC220 PC230 PC250 PC270 PC290 PC300 PC308 PC340 PC350 PC360 PC380 PC400 PC450 PW200 PW220
Regular price $ 99 -
Vendor: Komatsu
Relief Valve 723-40-92403 723-40-92401 for Komatsu Excavator PC400 PC450 PC550
Regular price $ 139 -
Vendor: Komatsu
Relief Valve 709-20-51800 for Komatsu Excavator PC60 PC60L PC70
Regular price $ 89 -
Vendor: Komatsu
PC60-7 Excavator Unloading Relief Valve 723-20-70500 723-30-70100
Regular price $ 98 -
Vendor: Komatsu
Main Relief Valve 723-40-93601 for Komatsu PC200-8 PC200LC-8 PC220-8 PC220LC-8 PC270-8 PC270LC-8
Regular price $ 110 -
Vendor: Komatsu
Main Relief Valve 709-70-55100 for Komatsu Excavator PC120-5 PC150 PC200 PC220
Regular price $ 98 -
Vendor: Komatsu
Main Pressure Relief Valve 709-70-51401 For Komatsu PC220-5 PC200-5 PC210-5
Regular price $ 89 -
Vendor: Komatsu
Main Relief Valve 709-70-51200 for Komatsu PC200-3 PC220-3 Excavator
Regular price $ 89 -
Vendor: Hitachi
For Hitachi Excavator EX200-5 ZX200-3 ZAXIS200 Main Relief Valve 4372038
Regular price $ 89
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.