Rexroth proportional directional valve HED8OH-20/100K14 available now.
$215.59
Rexroth proportional directional valves are mostly used in open-loop control; secondly, proportional valves come in many types, including proportional pressure and flow control valves, offering more flexible control than servo valves. Internally, servo valves typically have zero override, while proportional valves have a certain dead zone, resulting in lower control accuracy and slower response. However, in terms of development trends, especially in proportional directional flow control valves and servo valves, the performance difference between the two is gradually narrowing. Furthermore, proportional valves are significantly cheaper than servo valves and have stronger resistance to contamination.
Brand
REXROTH/German Rexroth
Rexroth Proportional Directional Valve Working Principle
Rexroth proportional directional valve working principle: 2-position 4-way and 3-position 4-way Rexroth proportional directional valves are directly controlled, plate-type structures; operated by a proportional solenoid with a center thread, the coil of which can be disassembled separately. The solenoid can be controlled by an external amplifier (WRE type) or a built-in amplifier (WREE type).
Example Model: 4WREE10E75-2X/G24K31/A1V
4WRE → Direct-controlled proportional directional valve, plate-type structure
E → With built-in amplifier (if E is not available, an external amplifier can be connected)
10 → 10-way valve (also available in 6-way, etc.)
E → Functional symbol (also E1-, V, W, W1-, EA, WA, etc.)
75 → Rated flow rate (NS10) at a differential pressure of 10 bar
75 L/min (Also available: (NS6)08, 16, 32; (NS10)25, 50, 75, etc.)
2X → 20 to 29 series (20 to 29: installation and connection dimensions unchanged)
G24 → 24V DC power supply
K31 → With socket conforming to E DIN 43 563-AM6-3, without plug. Plug must be ordered separately. (K4 refers to socket conforming to DIN 43 650-AM2, without plug)
A1 → WREE type A1 or F1 interface: setpoint input ±10 V (F1 = setpoint, input 4 to 20mA)
V → Fluororubber rectangular seal. Hydraulic oil conforming to DIN 51 524 standard (HL, HLP)
Affiliate/Distributor of Rexroth proportional valves, Bosch directional control valves @ Rexroth proportional directional valves, 2-position 4-way and 3-position 4-way proportional directional direct control valves, valve core with displacement feedback
Model 4WRE and 4WREE
6 and 10 mm diameter
2X series
Maximum working pressure 315 ba
Maximum flow rate 80 L/min (NS6)
Maximum flow rate 180 L/min (NS6)
Rexroth proportional directional valve automatic control can be divided into intermittent control and continuous control. Intermittent control is on/off control. Pneumatic control systems use on/off (ON-OFF) directional valves with low operating frequency to control the airflow. Pressure is adjusted by a pressure reducing valve, and flow rate is adjusted by a throttle valve. This traditional pneumatic control system requires multiple pressure reducing valves, throttle valves, and directional valves to achieve multiple output forces and multiple movement speeds. This not only increases the number of components, cost, and system complexity, but also requires many components to be manually adjusted in advance. Electro-proportional valve control is a type of continuous control, characterized by the output changing with the input, and a certain proportional relationship exists between the output and input. Proportional control is divided into open-loop control and closed-loop control.
Rexroth Proportional Directional Valve Structure and Principle
When the input signal to the Rexroth proportional directional 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 diaphragm 2 and closing the exhaust valve core 3, generating output pressure. This output pressure is fed back to the control loop 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 Directional 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 to 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 directional valve
Rexroth proportional directional valve
Rexroth proportional directional valve order numbers and models are as follows:
R961004665 REGULATOR4WREE6-22/A1*BG
R961003549 GERAETESATZDW40E-D.W4WREE6.-2X
R901161258 4WREE6E32-2X/G24K31/A1V-204
R901073856 HOUSING4WREE10.-22/
R901028415 4WREE10R3-75-2X/G24K31/A1V
R900625643 DECKEL4WRE10.A-12/
R900624754 GEHAEUSE4WRE10.-14/GGG4
R900617766 4WREE6WA16-2X/G24K31/F1V
R900617482 4WREE6E1-16-2X/G24K31/F1V
R90617269 4WREE10V75-2X/G24K31/F1V
R900617253 4WREEM6E32J-2X/G24K34/B6V-687
R900582331 4WRE10E16-1X/24K4/M
R900576935 4WRE10E32-1X/24K4/M-402
R900551280 4WRE6W1-08-1X/24K4/M
R900549113 4WRE10E1-32-1X/24K4/M
R900540589 KOLBEN4WRE6W1-16-1X/BG
R900487026 4WRE6W32-1X/24Z4/M
R900461236 4WRE10W1-16-1X/24K4/M
R901136691 4WREQ6Q5-08-2X/V5C-24PF60
R901135153 4WREE6V08-2X=G24K31/F1V-876
R901135118 4WREE10W75-2X/G24K31/A1V-280
R901132085 4WREQ6Q5-32-2X/V4A-24PF60
R901131081 4WREQ6V08-2X/V8F-24CA60
R901131077 4WREQ10V25-2X/V8F-24CA60
R901130450 4WREE10W1-75-2X/G24K31/A1V-660
R901130447 4WREE6E16-2X/G24K31/A1V-660
R901127151 4WREE10W25-2X/G24K31/A1V-280 R901126284 4WREE10E50-2X/G24K31/A1V-280
R901125908 4WREF6E32-2X/V-24PA1
R901125120 4WREE6V08-2X/G24K31/A1V-742
R901120444 4WREE10V1-75-2X/G24K31/A0V-907
R901116919 4WREE6Q5-32-2X/G24K31/A1V=DE
R901113546 4WREE10Q00-2X/G24K31/A1V-598=DE
R901113540 4WREE6Q00-2X/G24K31/A1V-598=DE
R901113345 4WREE10Q5-50-2X/G24K31/A1V=DE
R901112728 4WREE10E25-2X/G24K31/A1V-280
R901109650 4WREE6V32-2X/G24K31/F1V-876
R901107901 4WREE6V16-2X=G24K31/F1V-876
R901105844 KOLBEN4WREQ6Q2-08-20/
R901105842 KOLBEN4WREQ6Q2-32-20/ 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
