Product Title
Premium quality ED72 electro-hydraulic proportional pressure control valve, 100% interchangeable with original Bosch Rexroth A10VO/A10VSO series axial piston pumps (Series 31 & 32). Engineered for high-pressure industrial and mobile hydraulic systems requiring precise, electronic stepless pressure adjustment.
Key Features
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Proportional Control Logic: Features positive proportional control (current increase leads to pressure increase), delivering smooth and highly responsive dynamic pressure regulation.
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Integrated Pressure Cut-off: Built-in mechanical pressure cut-off function acts as a vital safety override, protecting your hydraulic motors, cylinders, and pumps from overpressure damage.
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Premium Solenoid Construction: Equipped with heavy-duty proportional solenoids (available in 24V DC or 12V DC) and hardened valve spools to ensure an extended operational lifespan in harsh working environments.
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Drop-in Replacement: Strict dimensional control guarantees a perfect fit on your existing Rexroth pump body, eliminating the premium cost of OEM parts while maintaining factory-level performance.
Technical Specifications
| Technical Attributes | Specifications & Data |
|---|---|
| Compatible Pump Series | Rexroth A10VO / A10VSO (Series 31, 32) |
| Control Type | Electro-hydraulic Proportional Pressure Control (ED72) |
| Operating Logic | Positive Control (Current Increase ➔ Pressure Increase) |
| Rated Voltage Options | 24V DC (Standard) / 12V DC (Optional) |
| Control Current Range | 24V: 200 mA – 800 mA | 12V: 400 mA – 1600 mA |
| Recommended PWM Frequency | 100 Hz – 200 Hz (with dither signal) |
| Max. Operating Pressure | Port X: 315 bar (Peak: 350 bar) |
| Pressure Adjustment Range | 50 bar to 315 bar (via mechanical adjustment screw) |
| Electrical Connection | Hirschmann Connector (DIN EN 175301-803) / AMP Jr. Timer |
| Fluid Cleanliness Code | ISO 4406 20/18/15 or better |
FAQ
Q1: What is the main operational difference between Rexroth ED71 and ED72 control valves? A: The primary difference lies in their current-to-pressure logic. ED72 is a positive control valve where an increase in control current results in a proportional increase in system pressure. Conversely, ED71 is a negative control valve where a decrease in current or total power loss forces the system to its maximum preset pressure. Please check your control system blueprint before ordering.
Q2: Does your ED72 valve include the pressure cut-off feature? A: Yes. Our ED72 control valve features an integrated mechanical pressure cut-off valve. Once the system reaches the maximum limit preset by the adjustment screw, the pump will automatically destroke to prevent system damage, serving as a reliable structural safeguard.
Q3: Are your valves drop-in replacements for original Bosch Rexroth pumps? A: Absolutely. All our A10VO control valves are manufactured to strict technical tolerances. They share identical mounting patterns, port dimensions, and electrical interfaces with the original Rexroth 31 and 32 series components, ensuring a seamless, worry-free replacement process.
