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Main & Relief Valves
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Vendor: Volvo
EC360B EC380D Excavator Relief Valve VOE14577744 14577744 14561300
Regular price $ 129 -
Vendor: Volvo
Relief Valve 14577745 For Excavator Hydraulic Relief Valve EC360 EC380 SY365 SY385 SY465
Regular price $ 120 -
Vendor: Volvo
SA8230-34500 RELIEF VALVE FITS VOLVO EC460 EC460B TRAVEL MOTOR
Regular price $ 139 -
Vendor: Komatsu
421-43-27460 4214327460 Relief Valve Fits for Komatsu WA420-3 WA430-5 WA450-3 WA470-3 WA480-5 WA500-3 WA600-3 WA700-3 WA800-3 WA800L-3 WA900-3 WA900L-3 Loader
Regular price $ 89 -
Vendor: Hitachi
4446002 Main Relief Valve for Hitachi Excavator ZX110 ZX1000K-3 ZX120-3 ZX130-3
Regular price $ 178 -
Vendor: New Holland
Hydraulic Relief Valve 87426717 For New Holland U80C B110C LV80 Case 580SM 590SM
Regular price $ 188 -
Vendor: HYUNDAI
31Q8-17790 31Q4-17750 Relief Valve For Hyundai R225-9 R225-7 R215-7 R215-9
Regular price $ 89 -
Vendor: HYUNDAI
XKBF-00094 Main Relief Valve For R140-7 R110-7 Excavator Spare Parts XKBF00094
Regular price $ 89 -
Vendor: HYUNDAI
XJBN-01261 Hydraulic Pump Valve Excavator Spare Parts Main Relief Valve AV280
Regular price $ 129 -
Vendor: Volvo
Pressure Relief Valve 14636708 for Volvo Excavator EC200D EC210D
Regular price $ 198 -
Vendor: Volvo
SA7270-11161 Relief Valve EC210B EC240B Excavator Conterll Valve Parts 7270-11161 SA727011161
Regular price $ 188 -
Vendor: Volvo
Relief Valve VOE 14628881 For Volvo Excavator EC210 EC240 EC290 EC290B
Regular price $ 188
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.