The A10VO Pump DR Control Valve is a pressure shut-off control module (DR = Druck-Regelung, pressure control) for the Rexroth A10VO series axial piston variable pumps. It is a pump-specific built-in regulating element.
The sole function of the A10VO Pump DR Control Valve is pressure shut-off and pump protection:
1. When the pump output pressure reaches the set value of the DR valve, the valve drives the pump's swashplate to rapidly reduce its tilt angle, causing the pump displacement to drop to a "minimum value to compensate for leakage," entering a "high-pressure standby" state;
2. It limits the pump's maximum output pressure to prevent pump damage due to overpressure, essentially acting as a "built-in safety valve" for the pump.
| Items | Specifications |
| Compatible Pump Model | 1. A10VO Series (18/28/45/60/71/74/100/140 displacement, etc.) |
| Nominal Pressure Setting Range | 2. Standard Setting: A10VO 31 Series (small displacement) ≈ 280 bar; A10VO 52 Series (large displacement) ≈ 250 bar Adjustable Range: 160-315 bar (must match pump's pressure limit) |
| Pressure Cut-off Response Time | 3. ≤0.15s (variable displacement mechanism action delay) |
| Working Medium | 4. Mineral hydraulic oil (ISO VG 32/46/68), viscosity range 10-1000 mm²/s |
| Operating Temperature | 5. -20°C-80°C (short-term 100°C) |
| Installation Method | 6. Integrated into pump body control chamber, or externally mounted via flange (mechanically linked to pump variable displacement mechanism) |
| Interface Specifications | 7. Control port: M10x1.5 (pressure feedback port); Drain port: M6x1 (or integrated into pump housing drain) |
Runhe Hydraulics is a reliable supplier of hydraulic pump valves, specializing in high-precision hydraulic pump control valves. We boast strict quality checks, full spec options, OEM support, global shipping and professional after-sales for all industrial hydraulic system needs.
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