Product Overview
The Rexroth AB21-11/16-050-2-1X/M (Material Number R900545627) is a precision-engineered hydraulic control block from the Bosch Rexroth AB series of modular sandwich (intermediate) plates. Designed to be mounted between a directional spool valve and its subplate, this control block integrates a pilot-operated check function that locks actuator ports against load-induced drift and reverse flow until a positive pilot pressure signal is applied. The AB21-11/16-050-2-1X/M is built around Rexroth’s proven spool-and-sleeve sealing technology, delivering leak-tight load holding, fast pilot response, and repeatable metering characteristics. As a component within the Rexroth directional spool valve family, it serves as a critical safety and load-control element in high-pressure industrial hydraulic circuits, ensuring controlled actuator positioning and reliable pressure retention in demanding duty cycles.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Hydraulic Valve — Directional Spool Valve Control Block (Sandwich / Intermediate Plate) |
| Model Designation | AB21-11/16-050-2-1X/M |
| Material Number | R900545627 |
| Series | 1X (Component Series 10 to 19, installation and connection dimensions unchanged) |
| Nominal Size | NG16 (nominal flow size 16) |
| Function Type | AB21 — Pilot-operated check / load-holding control block |
| Operating Pressure | Up to 315 bar (working ports); pilot pressure port rated to standard industrial grade |
| Pilot Ratio | Approx. 1:4.5 (pilot pressure to load pressure, model-dependent) |
| Mounting & Connection | ISO 4401 / DIN 24340 NG16 subplate interface; sandwich mounting between directional valve and subplate |
| Sealing | NBR (Buna-N) O-ring seals, standard mineral oil compatibility |
| Hydraulic Fluid | Mineral oil HL / HLP per DIN 51524; viscosity range 10–800 mm²/s |
Engineering Features & Advantages
- Precision Performance: The hydraulic valve — directional spool valve control block (sandwich / intermediate plate) delivers precise, repeatable performance with low hysteresis and stable control across the full working range.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with robust construction and wear-resistant internal components for extended service life.
- Direct Fit Replacement: Precision-manufactured to original REXROTH specifications for direct replacement, minimising downtime and eliminating fitment issues.
- Rated Capability: Rated for pressure ratings up to 315 bar, supporting stable operation across the full working range.
Typical Industrial Applications
As a component within the Rexroth directional spool valve family, it serves as a critical safety and load-control element in high-pressure industrial hydraulic circuits, ensuring controlled actuator positioning and reliable pressure retention in demanding duty cycles.
PRODUCT IMAGES
REXROTH AB21-11/16-050-2-1X/M / R900545627 Hydraulic Control Block
⚡ 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 AB21-11/16-050-2-1X/M / R900545627 Solenoid Directional Spool Valve. This Germany-made hydraulic component features a robust spool design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.