Product Overview
The Rexroth FD 16 KA21/B03V (Material Number R900503974) is a pilot-operated load holding valve (also referred to as a pilot-operated check valve or counterbalance valve) belonging to Rexroth’s FD series of pressure control valves. It is designed to reliably lock a hydraulic actuator in position and prevent uncontrolled load drift or dropping in the event of a pressure loss or line rupture. The valve operates on a leak-free poppet seating principle, held closed by a spring and the load-induced pressure, and is opened by a pilot pressure signal applied to the release port. With a nominal size of NG16 and a B03V spring/pilot configuration, this valve provides dependable load holding and controlled lowering in demanding industrial hydraulic circuits.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Hydraulic Valve — Pressure Control Valve (Pilot-Operated Load Holding Valve) |
| Model Designation | FD 16 KA21/B03V |
| Material Number | R900503974 |
| Nominal Size | NG16 |
| Operating Pressure | Standard Industrial Grade (Up to rated bar per Rexroth FD series data) |
| Mounting & Connection | Standard ISO / Manufacturer Interface (subplate or sandwich mounting) |
Engineering Features & Advantages
- Precision Performance: Leak-free poppet seating ensures reliable load holding with minimal internal leakage, while the pilot-operated release provides smooth, controlled lowering of suspended loads.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with robust construction that resists pressure spikes and protects actuators against line rupture or sudden pressure loss.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original OEM standards, ensuring drop-in interchangeability for the FD 16 KA21/B03V (R900503974).
Typical Industrial Applications
This load holding valve is commonly deployed in plastic injection molding machines, metallurgical presses, construction and marine hydraulics, and CNC machine tools, where secure load retention and controlled actuator descent are critical to safe and precise operation.
PRODUCT IMAGES
REXROTH FD 16 KA21/B03V / R900503974 Load Holding Valve
⚡ 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 FD 16 KA21/B03V / R900503974 Pressure Compensated Flow Control Valve. This German-made hydraulic component features a precise flow control design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.
