REXROTH proportional valve 4WRDE16V1-200L-5X/6L24K9/V

Brand

REXROTH/German Rexroth

REXROTH Proportional Valve Structure and Principle

When the input signal of a REXROTH proportional valve increases, the pilot valve 1 of the supply solenoid valve switches, while the exhaust solenoid pilot valve 7 remains in the reset state. The supply pressure then enters the pilot chamber 5 through the SUP port via valve 1. The pilot chamber pressure rises, and the air pressure acts on the diaphragm 2, causing the supply valve core 4 connected to diaphragm 2 to open, while the exhaust valve core 3 closes, generating output pressure. This output pressure is fed back to the control circuit 8 via pressure sensor 6. Here, a rapid comparison and correction is performed with the target value until the output pressure is proportional to the input signal, thus demonstrating that the output pressure changes proportionally to the change in the input signal. Because there is no nozzle-baffle mechanism, the valve is insensitive to impurities and has high reliability.

REXROTH Proportional Valve Features

1) Enables stepless adjustment of pressure and speed, avoiding the impact phenomenon during switching of normally open on/off valves.

2) Enables remote control and program control.

3) Compared with intermittent control, the system is simplified, and the number of components is greatly reduced. 4) Compared to hydraulic proportional valves, it is smaller, lighter, simpler in structure, and lower in cost, but its response speed is much slower than that of a hydraulic system, and it is more sensitive to load changes.

5) It uses less power, generates less heat, and produces less noise.

6) It will not cause a fire and will not pollute the environment. It is less affected by temperature changes.

Rexroth proportional valves can control flow in two ways:

One is on-off control: either fully open or fully closed, the flow is either at its maximum or minimum, with no intermediate state, such as ordinary solenoid direct-flow valves, solenoid directional valves, and electro-hydraulic directional valves.

The other is continuous control: the valve port can be opened to any degree as needed, thereby controlling the flow rate. These valves can be manually controlled, such as throttle valves, or electrically controlled, such as proportional valves and servo valves.

Therefore, the purpose of using proportional valves or servo valves is to achieve flow throttling control electronically (of course, pressure control can also be achieved through structural modifications). Since it is throttling control, there will inevitably be energy loss. Servo valves differ from other valves in that their energy loss is greater because they require a certain flow rate to maintain the operation of the pre-stage control circuit.

Working Principle and Structure of Rexroth Proportional Valves (Germany)

The working principle of a Rexroth proportional valve is as follows: When not braking, the piston is at its left limit position under the thrust F applied by the load-sensing spring through the lever. At this time, the valve leaves the valve seat and opens, connecting the input and output oil circuits. When braking begins, brake fluid with a pressure of P1 from the booster enters through the inlet and is delivered to the rear brake line through the outlet via the valve. At this time, the output hydraulic pressure P equals the input hydraulic pressure P1. When the brake pedal force increases, P1 and P2 increase synchronously. However, because the pressure-bearing area on the left side of the piston is larger than that on the right, the force on the left side of the piston is also greater than that on the right. Given a fixed structure and other parameters, the initial control pressure P· of the Rexroth proportional valve depends on the magnitude of the load-sensing spring preload, which ranges from 1.35 to 2.7 MPa. Therefore, load-sensing adjustment can be achieved by making the spring preload change with the actual axle load of the vehicle. The load-sensing proportional valve is installed near the left rear wheel. Its installation method ensures that when the axle load increases, the load-sensing spring is stretched, increasing the hydraulic pressure PS at the inflection point; when the axle load decreases, PS decreases. This allows Ps to change with the load, achieving load-sensing adjustment and making the front and rear wheel braking force distribution closer to the ideal distribution characteristic curve. 4WRKE16E200L-3X/6EG24EK31/A1D3M REXROTH

German REXROTH proportional valve models

R901160405 4WRDE16V1-125L-5X/6L24TK9/M-280

R901147771 4WRDE25E1-220L-5X/6L24K9/M

R901102032 4WRDE16V1-200L-5X/6L24K9/V

R901047758 4WRDE25W1-350L-5X/6L24EK9/WG152M

R901047756 4WRDE10W1-100L-5X/6L24EK9/WG152M R900702685 4WRDE16W1-200L-5X/6L24EK9/M

R900702612 4WRDE25V1-350L-5X/6L24EK9/WG152MR

R901050179 4WRDE10V1-50L-5X/6L24ETK9/M-280

R901049339 4WRDE16V1-125L-5X/6L24K9/WG152MR

R901048599 4WRDE16E125P-5X/6L24ETK9/M-280

R901047780 4WRDE10V50L-5X/6L24TK9/V

R901047758 4WRDE25W1-350L-5X/6L24EK9/WG152M

R901047756 4WRDE10W1-100L-5X/6L24EK9/WG152M

R901030042 4WRDE25V350L-5X/6L15ETK9/VR

R901026319 4WRDE10E100L-5X/6L24TK9/WG152M

R901025630 4WRDE25E350S-5X/6L24K9/M-280

4WRKE32E600L-3X/6EG24K31/A1D3M REXROTH 4WRZ10W8-50-7X/6EG24N9K4/D3M REXROTH

4WRZE16W8-100-7X/6EG24K31/A1M REXROTH

4WRZ32W6-520-7X/6EG24N9EK4/M REXROTH

Rexroth | REXROTH | Rexroth KKDS | Proportional Directional Valve 4WR | Proportional Valve

4WRZ25W8-325-7X/6EG24N9ETK4/D3M REXROTH

4WRZE10W6-50-7X/6EG24K31/A1D3M REXROTH

4WRZ16W6A150-7X/6EG24N9ETK4/D3M REXROTH

4WRZE25W6-220-7X/6EG24N9ETK31/F1D3M REXROTH

4WRZ16E100-7X/6EG24N9EK4/D3V REXROTH

4WRTE35W8-1000P-4X/6EG24EK31/F1M REXROTH

4WRZ32W6-520-7X/6EG24N9K4/D3M REXROTH

4WRZ10E1-85-5X/6A24ETK4/D3M-402 REXROTH

4WRZ16E150-6X/6AG24NK4/M REXROTH 4WRZ25W6-325-7X/6EG24N9TK4/D3M REXROTH

4WREE6E32-2X/G24K31/A1V REXROTH

4WRZ16W6-150-7X/6EG24N9ETK4/M REXROTH

4WREE10W1-50-2X/G24K31/F1V REXROTH

4WRZ16E3-150-6X//M REXROTH The company mainly deals with European and American brands and can source brands from any European country. For example, our key German brands include: BURKERT, DEMAG, HAWE, REXROTH, HYDAC, PILZ relays, FESTO, IFM sensors, E+H, HEIDENHAIN, P+F sensors, SICK, TURCK, and HIRSCHMANN industrial switches. German brands: Hengstler, Murr, Schmersal, Samson, EPRO (Emerson Group)

American brands: MOOG, ASCO, MAC, NUMATICS, PARKER, Vickers, Helón (Norgren)

Italian brands: OMAL, ATOS, CAMOZZI, UNIVER, Camozzi