German Rexroth proportional valve 4WE10E50/HG24N9K4/M in stock

Brand

REXROTH/German Rexroth

Rexroth vane pumps, Rexroth cylinders, Rexroth solenoid valves

Rexroth is committed to providing safe, efficient, and cost-effective drive and control technologies for various machines and systems. The company integrates global application experience to develop innovative products, tailoring system solutions and services for customers in every segment of the mobile machinery, mechanical applications and engineering, factory automation, and renewable energy markets. Rexroth also provides customers with a variety of hydraulic, electronic drive and control, pneumatic, gear, linear drive, and assembly technologies. The company operates in more than 80 countries worldwide, employs over 37,500 people, and achieved global sales of nearly €6.5 billion in 2012.

Rexroth proportional valves can control flow in two ways: one is on/off control: either fully open or fully closed, with either high or low flow rates, without intermediate states, such as ordinary solenoid straight-through valves, solenoid directional valves, and electro-hydraulic directional valves. Another type 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. The purpose of using proportional or servo valves is to achieve flow control through electrical means (of course, pressure control can also be achieved through structural modifications). Since it is flow control, there is inevitably 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.

German Rexroth proportional valves are mainly distinguished by the following points:

1. Different drive devices. The drive device for proportional valves is a proportional electromagnet; the drive device for servo valves is a force motor or torque motor;

2. Different performance parameters. 2.1 Servo valves have no dead zone in the neutral position, while proportional valves do. Therefore, their applications differ. Servo valves and servo proportional valves are mainly used in closed-loop control systems, while other proportional valve structures are mainly used in open-loop control systems and closed-loop speed control systems.

2.2 Servo valves have a higher frequency response (response frequency), reaching up to around 200Hz, while proportional valves generally have a maximum frequency of tens of Hz.

2.3 Servo valves have higher requirements for hydraulic fluid, requiring fine filtration to prevent clogging, while proportional valves have lower requirements.

3. Valve core structure and machining precision differ. Proportional valves use a valve core + valve body structure, with the valve body also serving as the valve sleeve. Servo valves and servo proportional valves use a valve core + valve sleeve structure.

4. Neutral position functions differ. Proportional directional valves have neutral position functions similar to ordinary directional valves, while servo valves only have an O-type neutral position function (E-type for Rexroth products).

5. Rated pressure drop differs.

Rexroth proportional valves from Germany offer performance between servo valves and standard proportional valves.

Rexroth proportional valves are a type of proportional valve used to control flow rate and direction.

Further information: Automatic control of electro-proportional valves can be divided into intermittent control and continuous control. Intermittent control is also known as on-off control. Pneumatic control systems use on-off (ON-OFF) directional valves with low operating frequencies to control the airflow. Pressure is adjusted by pressure reducing valves, and flow rate is adjusted by throttle valves. This traditional pneumatic control system requires multiple pressure reducing valves, throttle valves, and directional valves to achieve multiple output forces and speeds. This results in numerous components, high cost, complex system construction, and many components require pre-adjustment. Electro-proportional valve control is a type of continuous control, characterized by output varying with input, exhibiting a proportional relationship between the two. Proportional control can be open-loop or closed-loop.

The working principle of the German Rexroth proportional valve:

When the input signal of the German 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 pressure in the pilot chamber rises, and this pressure acts on the diaphragm 2, opening the supply valve core 4 connected to the diaphragm 2 and closing the exhaust valve core 3, generating output pressure. This output pressure is fed back to the control loop 8 via the 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.

Features of the German Rexroth proportional valve:

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

2) It can achieve 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.

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R900958851 4WRE10EA64-1X/24K4/M-193 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, ROSS

British brands: Norgren

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