Description

REXRTOH 4WRSE10V80-32/G24K0/A1V-695 R900247749

1. Basic Information

REXROTH 4WRSE10V80-32/G24K0/A1V-695 (Order No.: R900247749) is a high-response electro-hydraulic proportional directional valve, serving as an industrial high-precision integrated electronic hydraulic control unit. Built-in integrated amplification control circuit eliminates the need for external drive modules. Developed for high-precision, high-dynamic and low-lag electro-hydraulic servo control systems, it enables continuous stepless proportional regulation of flow rate, direction and speed in hydraulic systems. It perfectly adapts to severe hydraulic working conditions including high-frequency reciprocation, precise positioning, synchronous follow-up and dynamic load fluctuation, acting as a core control component for high-end hydraulic molding, forging equipment, precision test benches and automated hydraulic production lines.

Adopting mature Rexroth 4-way 3-position high-precision spool structure and V-type flow control window, the valve delivers excellent flow linearity and fine flow regulation capability. It features nominal diameter DN10, rated flow 80L/min and maximum withstand system pressure up to 350bar. Equipped with G24 standard 24VDC power supply, K0 standard coil configuration, A1V standardized signal interface and 695 customized working condition program, it integrates closed-loop position feedback, automatic spool zero calibration, dynamic flow compensation, temperature drift compensation and full-range fault protection functions. It thoroughly solves common industry problems of traditional hydraulic valves such as control lag, non-linear flow, zero offset, temperature drift deviation and poor anti-interference performance. Featuring fast response, high repetitive positioning accuracy and superior operational stability, it maintains long-term high-precision proportional control and greatly improves movement smoothness, process consistency and finished product yield of hydraulic equipment.

The valve body adopts industrially precision forged structure and modular electric design, processed with high-pressure resistance, wear resistance, rust prevention and anti-aging treatments. It possesses outstanding vibration resistance, dustproof, oil-proof and electromagnetic interference resistance. The standardized plate mounting structure fits conventional hydraulic system integration schemes, and connects seamlessly with full-range Rexroth hydraulic systems as well as PLCs and industrial controllers from Siemens, Mitsubishi, Omron and other brands. It supports real-time dynamic parameter adjustment, adaptive spool zero calibration and operating status monitoring. Capable of 24-hour non-stop continuous operation, it runs steadily under complex hydraulic conditions with intense vibration, heavy dust and wide temperature variation. It is a stable and cost-effective core proportional control valve for universal high-end precision hydraulic control systems.

2. Technical Specifications

2.1 Core Hydraulic & Control Specifications

Power Supply: Adopts standard 24VDC industrial DC control power supply, adapting to regular voltage fluctuation on site. It features stable power supply, balanced power consumption and low heat generation. Built-in power filter and voltage stabilizing circuit effectively suppress interference from power grid clutter and voltage fluctuation, ensuring stable operation of internal amplification drive circuit, signal acquisition circuit and spool feedback unit, and enhancing overall control accuracy and long-term reliability.
Hydraulic Performance Parameters: Nominal diameter DN10, rated flow 80L/min under rated pressure difference, maximum working pressure 350bar, applicable to most medium and high-pressure industrial hydraulic systems. The 4-way 3-position spool with V-type throttle window achieves superior flow linearity and sensitive fine flow control without low-speed stagnation or flow sudden change, covering full-range control demands of micro adjustment, steady medium speed and high-speed dynamic response.
Control Performance: Equipped with dedicated Rexroth high-frequency proportional control algorithm and built-in spool position closed-loop feedback system to correct offset deviation in real time. It boasts fast response, minimal control lag and high repeatability. Integrated temperature drift compensation, pressure fluctuation adaptive compensation and dynamic load compensation algorithms automatically eliminate control errors caused by oil temperature change, system pressure variation and sudden load change, realizing accurate stepless regulation of hydraulic flow, direction and speed and meeting strict requirements of precise synchronization, high-speed reciprocation and high-precision positioning.
Signal & Control Configuration: Compatible with standard industrial analog signals and receives 0-10V voltage control commands from upper systems with high acquisition accuracy, strong anti-interference and zero transmission lag. The integrated electronic amplification control unit completes signal analysis, operational amplification and spool drive independently without external amplifiers, simplifying system structure, reducing fault points and fitting modern intelligent integrated hydraulic control systems.
Output Regulation Capacity: Supports full-range stepless flow regulation with smooth, impact-free and jitter-free spool movement and consistent performance at varying speeds. Fast dynamic response enables rapid flow and direction switching following control commands, reducing commutation impact and pressure pulsation, stabilizing actuator movement and positioning precision, and improving overall process stability.
Parameter Adjustability: Allows online dynamic adjustment of control gain, response speed, flow proportional coefficient, zero offset compensation and commutation ramp parameters to adapt to diverse system pressure, oil temperature and load conditions. Built-in universal parameter templates match injection molding, die casting, forging and testing equipment quickly for convenient and efficient on-site commissioning with strong compatibility.
Protection Mechanism: Comprehensive intelligent protection covers overpressure, undervoltage, overcurrent, coil overheating, abnormal signal, spool sticking and excessive zero offset protection. The system monitors operating status in real time, locks fault status, restricts abnormal output and triggers alarms upon anomalies, protecting the valve body, spool and rear hydraulic actuators, preventing fault spread and ensuring safe and stable system operation.
Environmental Adaptability: Designed for wide temperature range to adapt to regular oil and ambient temperature fluctuation of hydraulic systems. Operating humidity: 5%~95% non-condensing. The valve body is treated with anti-corrosion, rust-proof and oil-resistant processes. Electric parts feature excellent dustproof, moisture-proof and anti-electromagnetic interference performance, suitable for harsh workshop conditions with strong vibration, heavy oil pollution and intense electromagnetic interference.

2.2 Physical & Structural Specifications

Installation Mode: Standard plate mounting structure conforms to universal hydraulic manifold installation standards with precise positioning, firm fixation and excellent vibration resistance. It resists long-term high-frequency vibration without loosening, oil leakage or displacement, suitable for renovation, upgrading and new assembly of hydraulic equipment.
Structural Design: Compact integrated structure highly incorporates hydraulic valve body, precision spool, electromagnetic drive coil, position sensor, signal conditioning circuit, power amplification unit and protection circuit. Neat layout and high integration save manifold installation space, ideal for compact integration schemes of various precision hydraulic equipment.
Weight: Standard lightweight industrial design with moderate weight, balancing structural strength, operational stability and convenience of assembly, replacement, debugging and maintenance for medium and small precision hydraulic equipment.
Material & Protection: The valve body is made of high-strength precision forged alloy processed with high-pressure quenching, wear hardening, rust and corrosion resistance, featuring high pressure resistance, wear resistance and deformation resistance with no high-pressure leakage. Flame-retardant industrial material is adopted for electric housing, and shielded internal wiring isolates external electromagnetic interference to avoid signal distortion and parameter drift with stable long-term performance.
Interface Features: Standard high-sealing hydraulic ports withstand high pressure and prevent leakage. Electric interfaces are reasonably partitioned with separated strong and weak electricity, enabling convenient plugging, reliable connection and anti-loose locking structure to avoid poor contact and signal interruption caused by vibration.
Status Feedback: Built-in real-time spool position feedback unit uploads spool opening, operating status and fault data synchronously to realize closed-loop precise control together with upper systems, facilitating real-time condition monitoring, rapid fault troubleshooting and improved maintenance efficiency.

2.3 Core Functions & Compatibility Specifications

Core Functions: Integrates hydraulic direction switching, stepless flow proportional regulation, spool position closed-loop control, dynamic load compensation, temperature drift adaptive correction, smooth commutation buffering and intelligent fault monitoring. It accurately adjusts running speed, stroke and output thrust of hydraulic actuators, suppresses commutation impact, operational jitter and pressure fluctuation, and adapts to high-frequency reciprocation, precise positioning, synchronous linkage and variable load dynamic working conditions.
Integration Features: Integrated electric control design with built-in signal amplification and drive functions requires no extra amplifiers or signal converters. Single valve independently completes signal reception, regulation, spool drive, status feedback and fault protection, greatly simplifying wiring and pipeline layout, reducing fault points and lowering equipment matching and maintenance costs.
Compatibility: Fully compatible with full-range Rexroth hydraulic pumps, cylinders and auxiliary components, matching various medium and high-pressure hydraulic systems. It supports mainstream PLC, industrial controller and HMI systems and 0-10V analog control standard, applicable to new equipment assembly and precision intelligent upgrading of old hydraulic systems.
Reliability & Practicability: Durable industrial design ensures negligible wear and no performance degradation after long-term high-frequency reciprocation, supporting 24-hour continuous operation. It boasts outstanding fatigue, impact and aging resistance with stable zero position and constant control accuracy and low failure rate. Online parameter debugging and status monitoring realize maintenance without disassembly, shortening downtime and improving production continuity and overall efficiency.

3. Working Principle

System Initialization and Self-calibrationAfter power-on, the valve automatically conducts electric unit self-check, coil condition detection, spool zero reset and signal port verification. It comprehensively inspects power supply, internal circuit, spool status and signal transmission, completes adaptive zero calibration to eliminate assembly deviation and static offset, and enters standby ready state waiting for control commands after passing inspection.

Command Reception and Signal Processing

The valve receives analog speed and direction control commands from upper systems in real time, and collects feedback signals from built-in high-precision spool position sensors simultaneously. Internal high-precision filtering eliminates electromagnetic interference and power clutter, calculating deviation between set opening and actual spool opening to provide accurate data for closed-loop regulation.

Closed-loop Calculation and Spool Drive

The built-in electric control unit executes adaptive PID regulation, dynamic compensation and ramp smoothing based on preset algorithms. It adjusts driving current of electromagnetic coils according to opening deviation to drive spool reciprocating movement and correct position error dynamically. Flow rate and direction are precisely controlled by changing opening of V-type throttle window, achieving stepless proportional regulation of hydraulic speed and direction.

Dynamic Compensation and Working Condition Adaptation

The system monitors oil temperature, working pressure and load fluctuation continuously, activating temperature drift, pressure fluctuation and load adaptive compensation algorithms to revise control parameters and offset errors caused by environmental and working condition changes, maintaining consistent control accuracy under diverse operating environments.

Status Feedback and System Linkage

The feedback unit continuously uploads spool opening, operating status, working conditions and fault information to upper systems and receives real-time adjustment commands to form closed-loop linkage control. Coordinated operation of multiple valves realizes synchronous movement, precise positioning and steady rhythm control of hydraulic equipment to meet demands of complex automated hydraulic processes.

Real-time Monitoring and Intelligent Protection Maintenance

Power voltage, coil current, operating temperature, spool movement and signal transmission are monitored all the time. Once faults such as overpressure, undervoltage, overcurrent, overheating, abnormal signal and spool sticking are detected, fault codes are locked, driving output is cut off and alarms are triggered to protect the valve and hydraulic system. Online parameter setting and status observation support convenient debugging and troubleshooting for long-term optimized stable operation.

4. Application Scenarios

4.1 Precision Injection & Die Casting Equipment

Widely used in hydraulic systems of high-end injection molding machines, die casting machines and rubber molding machines. It precisely controls hydraulic speed and pressure throughout mold clamping, injection, pressure holding, mold opening and ejection processes. Excellent flow linearity and fine regulation performance stabilize process parameters, effectively reducing shrinkage, burr, deformation and uneven thickness defects, improving product consistency and yield for mass precision production.

4.2 Heavy-duty Forging & Hydraulic Machine Tools

Applicable to precision hydraulic forging presses, high-speed punching machines, bending machines, hydraulic shapers and CNC hydraulic machine tools. With 350bar high pressure resistance and high dynamic response capability, it accurately adjusts feed speed, stamping pressure and stroke position, suppressing high-pressure impact and vibration, ensuring stable movement, precise positioning and uniform output force to satisfy strict precision requirements of high-end machining and forging processes.

4.3 Precision Hydraulic Testing & Inspection Equipment

Mainly applied to hydraulic test benches, component fatigue testing machines, material pressure inspection devices and dynamic performance detection systems. It achieves long-term stable stepless regulation of flow, pressure and speed with high precision and repeatability, accurately simulating various hydraulic dynamic conditions and guaranteeing accurate, traceable and reusable test data for scientific research, product verification and performance testing.

4.4 Automated Multi-axis Synchronous Hydraulic Production Lines

Suitable for automated hydraulic lines, multi-axis synchronous linkage systems, hydraulic lifting platforms and intelligent servo hydraulic control systems. Fast dynamic response and high-precision closed-loop control realize synchronous movement of multiple equipment and axes, unify production rhythm, eliminate synchronization deviation and enhance operational smoothness and efficiency for continuous intelligent industrial production.

4.5 Precision Upgrading & Renovation of Old Hydraulic Equipment

It serves as an ideal replacement for conventional directional valves and simple proportional valves in old equipment renovation projects. High-precision proportional control, dynamic adaptive compensation and intelligent monitoring resolve problems of low accuracy, operational jitter, unstable conditions and high failure rate, upgrading automation level and process precision, cutting maintenance costs and realizing intelligent and precise improvement of traditional hydraulic equipment.