Product Overview
The Rexroth Z2S 6B1-66 (Material No. R900347501) is a pilot operated check valve from the proven Z2S series, designed for leak-free load holding and reliable blocking of flow in one direction while permitting free flow in the opposite direction. As a modular (sandwich plate) valve, it mounts directly beneath directional control valves in accordance with ISO 4401 / DIN 24340 size 6 (NG6 / CETOP 3) interfaces, enabling compact system integration without additional piping. The valve operates on a spring-loaded poppet principle: flow passes freely in the forward direction, while reverse flow is blocked until a pilot pressure signal acts on the internal control piston to lift the poppet off its seat. This pilot-assisted opening ensures controlled, leakage-free load retention and prevents uncontrolled load descent in lifting and clamping circuits. With a nominal size of 6 and a cracking pressure of approximately 6 bar, the Z2S 6B1-66 is engineered for dependable performance in demanding industrial hydraulic systems.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Pilot Operated Check Valve (Modular / Sandwich Plate Design) |
| Model Designation | Z2S 6B1-66 |
| Material Number | R900347501 |
| Nominal Size | NG6 (CETOP 3 / ISO 4401 size 6) |
| Operating Pressure | Up to 315 bar (working pressure, standard industrial grade) |
| Cracking Pressure | Approx. 6 bar (spring-loaded poppet) |
| Pilot Ratio | Standard pilot-to-load ratio for reliable poppet release |
| Mounting & Connection | Sandwich plate mounting per ISO 4401 / DIN 24340, NG6 interface |
| Sealing | NBR (Buna-N) seals, suitable for mineral oil based hydraulic fluids |
| Fluid Compatibility | HL / HLP mineral oils per DIN 51524; other fluids on request |
Engineering Features & Advantages
- Leak-Free Load Holding: The spring-loaded poppet seat design provides virtually zero internal leakage in the blocked direction, ensuring stable load retention in clamping, lifting, and holding circuits.
- Industrial Reliability: Designed for dependable long-term operation in demanding industrial environments, with quality bearings and sealing systems ensuring extended maintenance intervals.
- Direct Fit Replacement: Precision-manufactured to original REXROTH specifications for direct replacement, minimising downtime and eliminating fitment issues.
Typical Industrial Applications
With a nominal size of 6 and a cracking pressure of approximately 6 bar, the Z2S 6B1-66 is engineered for dependable performance in demanding industrial hydraulic systems.
PRODUCT IMAGES
REXROTH Z2S 6B1-66/ / R900347501 Pilot Operated Check 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 Z2S 6B1-66/ / R900347501 Pilot Operated Check Valve. This Germany-made hydraulic component features a pilot-operated design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.