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The excavator multi-valve circuit is a key component of the excavator hydraulic system. Its function is to control the flow direction and pressure of hydraulic oil to achieve coordination and precise control of various excavator actions. Different brands of excavator multi-valve circuits have different characteristics and application ranges. The following are some major brands:
1. Bosch Rexroth
2. Hitachi
3. Caterpillar
4. Kawasaki
5. Tokyo Keiki, Japan
6. Rexroth
7.Rötelmann
The working valve pieces are configured in groups, and the inlet valve block has a built-in three-way pressure compensation bypass relief valve (logic element. When the multi-way valve stops operating and each valve is in the neutral position, the valve will compensate for the pressure (6- ·12BAR) bypass main oil flow. When a certain valve works, the bypass port of the valve decreases under the load pressure and provides the required flow according to the load pressure. The multi-way valve adopts a unified modular design as a whole, which can Provide reliable system solutions for manufacturers of engineering vehicles. Users can combine different valve bodies according to functional requirements, which is simple and reliable.
1. Load sensing shuttle valve: The load sensing shuttle valve transmits the load pressure of each working valve plate to the pressure compensation bypass relief valve of the inlet valve block.
Two-way pressure compensated fixed difference pressure reducing valve: When multiple work piece valves operate at the same time, the load pressure is transmitted to the spring side of the valve. At this time, the negative feedback effect of the valve core automatically adjusts the pressure difference at both ends of the throttle valve port to keep it basically unchanged. Under its action, the flow rate of each valve remains constant and is not affected by load changes.
2. Safety relief valve: usually used for limit protection of working mechanisms, such as luffing cylinders
3. Electromagnetic relief valve: used for over-limit protection of working mechanisms, such as: crane torque limit, three-turn protection, etc.
7. Proportional pressure reducing valve: Located on the opposite side of the working valve plate hand lever, it is a direct-acting proportional pressure reducing valve that drives the slide valve to achieve proportional reversal. Note: the proportional reversing of the direct-acting proportional pressure reducing valve is compared with the manual one. Proportional commutation and micro-movement performance are not good. If used in applications with high flow control accuracy, a working valve plate configured with proportional servo drive should be used.
REXROTH, Rötelmann, Eaton, Parker, Bosch Rexroth, BUCHER, DELTA POWER, Hitachi, Caterpillar, Kawasaki, SAUER-DANFOSS all have servo-driven proportional multi-way valves.
Please feel free to contactus Parts Sea engineers or sales for help if you have no parts No.
tse@partssea.com | sales@partssea.com
The excavator multi-valve circuit is a key component of the excavator hydraulic system. Its function is to control the flow direction and pressure of hydraulic oil to achieve coordination and precise control of various excavator actions. Different brands of excavator multi-valve circuits have different characteristics and application ranges. The following are some major brands:
1. Bosch Rexroth
2. Hitachi
3. Caterpillar
4. Kawasaki
5. Tokyo Keiki, Japan
6. Rexroth
7.Rötelmann
The working valve pieces are configured in groups, and the inlet valve block has a built-in three-way pressure compensation bypass relief valve (logic element. When the multi-way valve stops operating and each valve is in the neutral position, the valve will compensate for the pressure (6- ·12BAR) bypass main oil flow. When a certain valve works, the bypass port of the valve decreases under the load pressure and provides the required flow according to the load pressure. The multi-way valve adopts a unified modular design as a whole, which can Provide reliable system solutions for manufacturers of engineering vehicles. Users can combine different valve bodies according to functional requirements, which is simple and reliable.
1. Load sensing shuttle valve: The load sensing shuttle valve transmits the load pressure of each working valve plate to the pressure compensation bypass relief valve of the inlet valve block.
Two-way pressure compensated fixed difference pressure reducing valve: When multiple work piece valves operate at the same time, the load pressure is transmitted to the spring side of the valve. At this time, the negative feedback effect of the valve core automatically adjusts the pressure difference at both ends of the throttle valve port to keep it basically unchanged. Under its action, the flow rate of each valve remains constant and is not affected by load changes.
2. Safety relief valve: usually used for limit protection of working mechanisms, such as luffing cylinders
3. Electromagnetic relief valve: used for over-limit protection of working mechanisms, such as: crane torque limit, three-turn protection, etc.
7. Proportional pressure reducing valve: Located on the opposite side of the working valve plate hand lever, it is a direct-acting proportional pressure reducing valve that drives the slide valve to achieve proportional reversal. Note: the proportional reversing of the direct-acting proportional pressure reducing valve is compared with the manual one. Proportional commutation and micro-movement performance are not good. If used in applications with high flow control accuracy, a working valve plate configured with proportional servo drive should be used.
REXROTH, Rötelmann, Eaton, Parker, Bosch Rexroth, BUCHER, DELTA POWER, Hitachi, Caterpillar, Kawasaki, SAUER-DANFOSS all have servo-driven proportional multi-way valves.