A11VO130DRL A11VLO190DRL control valve
3 week ago
Product details
A11VO130DRL, A11VLO190DRL Control Valve
Product Overview
A11VO130DRL and A11VLO190DRL control valve is an integrated Hydraulic valve for Rexroth A11VO130 and A11VLO190 axial piston variable pump. Mounted directly on main pump housing, it serves as the core regulation unit of the hydraulic system. This control assembly combines pressure‑cut‑off and constant‑power control functions, automatically adjusting pump swashplate angle and displacement according to working pressure of the Machine. Worn, stuck or improperly calibrated control valve will trigger typical failures: engine lug‑down, insufficient digging power, high hydraulic oil temperature, pressure drift, abnormal pump noise and reduced working efficiency. This aftermarket replacement component follows original mounting interface, perfectly suited for pump overhaul, field repair and component swap of mobile construction machinery.
Technical Specifications
- Applicable Pump Model: A11VO130DRL, A11VLO190DRL axial piston variable hydraulic pump
- Product Name: Pump Control Valve / Regulator Valve
- Control Mode: DRL: pressure cut‑off plus constant power control
- Max working pressure: 350 bar (continuous); 400 bar peak pressure
- Matching displacement: 130cm³/rev, 190cm³/rev
- Working medium: Anti‑wear mineral hydraulic oil
- Operating temperature: ‑20℃ ~ +80℃
- Installation: Direct bolt‑on assembly on pump body, no extra machining
- Adjustable items: System maximum pressure setting, constant‑power output curve, max‑min pump displacement limit
- Internal parts: Control spool, power‑control spring group, pressure‑cut‑off spring, adjustment screw assembly
Working Principle
Receiving real‑time pressure feedback signal from the hydraulic system, the DRL control valve drives the internal servo piston to change the swashplate swing angle of main pump. Under light‑load condition, the pump maintains large displacement to deliver high flow for fast movement of the Machine. When working pressure rises under heavy‑load operation, constant‑power function reduces pump displacement automatically to keep stable input power and avoid engine overload. Once system pressure reaches preset threshold, pressure‑cut‑off function acts, forcing pump to minimum displacement for system over‑pressure protection. If spool gets stuck or spring fatigues, power‑pressure matching will fail and break the whole hydraulic system performance.
Core Advantages
1. Strict manufacturing tolerance, fully consistent with original installation dimension for direct replacement.
2. High‑precision spool‑valve matching; sensitive pressure‑power response, stable control under heavy‑duty cyclic load.
3. External adjustable screws, convenient on‑site calibration for power curve and system pressure of the Machine.
4. High‑strength alloy internal components, strong anti‑fatigue performance, resist impact from pressure fluctuation inside hydraulic system.
5. Complete assembled control valve unit; no need to disassemble complicated original pump body during maintenance.
6. Effectively eliminate common pump faults: engine stalling under heavy load, insufficient output force, high oil temperature, pressure instability.
Application Scope
Specially fitted for Rexroth A11VO130, A11VLO190 main hydraulic pump, widely used for rotary drilling rig, large excavator, concrete pump truck and other heavy‑duty mobile Machine. As the critical Hydraulic valve for power regulation of hydraulic system, it guarantees reasonable power matching between diesel engine and main pump. It is essential spare‑part for equipment workshop overhaul and field emergency maintenance.
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