Product Overview
The Rexroth DR20-4-4X/200YM (Material No. R900418952) is a pilot-operated pressure reducing valve from the proven DR series, designed to maintain a constant reduced outlet pressure regardless of fluctuations in the inlet (primary) pressure or changes in flow demand. As a normally open, spool-type pressure control valve, it reduces a higher system pressure to a stable, preset secondary pressure at port A, making it an essential component for protecting downstream actuators, clamping circuits, and sub-systems within complex industrial hydraulic networks. The “200” designation indicates a pressure adjustment range up to 200 bar, while the “YM” suffix denotes the specific adjustment and control configuration. Manufactured to Rexroth’s exacting standards, this valve delivers precise pressure regulation, minimal hysteresis, and long-term reliability in continuous-duty applications.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Pressure Control Valve (Pilot-Operated Pressure Reducing Valve) |
| Model Designation | DR20-4-4X/200YM / R900418952 |
| Operating Pressure | Pressure adjustment range up to 200 bar (secondary pressure) |
| Mounting & Connection | Subplate mounting per ISO 5781 / Rexroth standard interface |
| Control Type | Pilot-operated, spool-type with adjustable pressure setting |
| Series | 4X (Component Series 40 to 49, installation and connection dimensions unchanged) |
| Nominal Size | NG20 (Size 20) |
| Adjustment Element | YM configuration (adjustment type per Rexroth ordering code) |
| Hydraulic Fluid | Mineral oil based hydraulic fluids (HL, HLP) per DIN 51524 |
Engineering Features & Advantages
- Precision Pressure Regulation: The pilot-operated spool design maintains a constant reduced outlet pressure with minimal deviation, even under varying inlet pressure and flow conditions, ensuring stable operation of downstream circuits.
- Wide Adjustment Range: The 200 bar pressure range provides flexible setting capability to suit a broad spectrum of industrial hydraulic requirements, with simple and repeatable adjustment.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with robust housing and precision-machined spool and sleeve for extended service life.
- Low Hysteresis and Fast Response: Optimized pilot stage delivers accurate pressure control with minimal pressure overshoot during dynamic load changes.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original OEM standards, ensuring drop-in replacement without modification to existing manifolds or piping.
<h
PRODUCT IMAGES
Rexroth DR20-4-4X/200YM / R900418952 Pressure Reducing Valve
âš¡ Emergency Plant Maintenance & Ready-to-Ship Notice:
- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine Rexroth DR20-4-4X/200YM / R900418952 Pressure Reducing Valve. This Germany-made hydraulic component features a direct-operated, spring-loaded design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.