Bosch Rexroth R900407424 Z2S10 A1-3X: 2026 Guide to the Pilot-Operated Sandwich Plate Check Valve
R900407424 · Z2S10 A1-3X
SANDWICH PLATE CHECK VALVE — PILOT OPERATED | SERIES 3X | NG10
Bosch Rexroth's leak-free, fail-safe load holding unit for modern hydraulic systems. Explore the full product details R900407424 Z2S10 A1-3X.
Strategic Overview
In 2026, hydraulic systems are no longer isolated muscle. The R900407424 Z2S10 A1-3X pilot-operated check valve acts as the physical safety and energy-efficiency layer between control valves and actuators. It mounts directly on NG10 / ISO 4401-05 subplates, blocks channel A leak-free, and opens only when pilot pressure is present.
This makes it ideal for load holding in vertical axes, press ram safety, injection moulding, CNC hydraulics, and material handling. When integrated with pressure transmitters and IIoT condition-monitoring gateways, the pilot signal and load pressure can be trended in SCADA/MES, enabling targeted predictive maintenance and reduced unplanned downtime.
Energy and sustainability win: leak-free blocking reduces pump duty, cuts heat generation, and lowers Scope 2 carbon reporting. For multi-shift operations, the total cost of ownership benefit is immediate.
Technical Benchmarking
Key Parameters
| Parameter | Value |
|---|---|
| Product / Model | R900407424 — Z2S 10 A1-3X |
| Type | Pilot-operated check valve, sandwich plate |
| Way configuration | Z2S10 |
| Spool symbol | A1 → A2 (check valve in channel A) |
| Mounting pattern | NG10 / ISO 4401-05-04-0-05 |
| Max operating pressure | 350 bar (5,076 psi) |
| Max flow | 160 l/min (42.3 GPM) |
| Cracking pressure | ≈ 4.5 bar (version 1) |
| Hydraulic fluid | Mineral oil HLP / HLPD |
| Viscosity range | 2.8 – 500 mm²/s |
| Fluid temperature | -30 °C to +80 °C |
| Series | 3X (30–39) |
Z2S 10 Pilot Operated vs Standard Check Valve
| Feature | Z2S 10 A1-3X | Standard Spring Check Valve |
|---|---|---|
| Load holding | Leak-free, pilot-controlled release | Minor internal leakage possible |
| Controlled lowering | Yes, via pilot pressure | No automatic controlled release |
| Mounting | Sandwich plate NG10 | Usually inline cartridge or line body |
| Max pressure | 350 bar | Varies by size/series |
| Max flow | 160 l/min | Varies by size/series |
| Typical use | Safety load holding, vertical axes | Non-return / free-flow protection |
Visual Gallery
Installation, Maintenance & Troubleshooting
Install the R900407424 Z2S10 A1-3X between the directional valve and the subplate, observing the NG10 interface and port orientation. Always verify pilot pressure is available before enabling controlled movement.
Common Symptoms
| Symptom | Probable Cause | Action |
|---|---|---|
| Cylinder drifts or creeps | Internal leakage or damaged poppet/seal | Inspect poppet, seat and seals; flush system; replace if needed |
| Slow pilot opening | Insufficient pilot pressure or contaminated fluid | Check pilot line pressure and oil cleanliness |
| Noise / oscillation | Air in system, high viscosity, or sizing mismatch | Bleed air, verify fluid temperature, check flow rating |
FAQ
What does “Z2S10 A1-3X” mean?
Z2S10 identifies the pilot-operated check valve series, A1 indicates the check valve is in channel A, and 3X is the Series 3X generation. R900407424 is the orderable Bosch Rexroth material number.
What is the maximum pressure and flow?
Max operating pressure is 350 bar and max flow is 160 l/min on mineral oil HLP/HLPD within the specified viscosity and temperature range.
Is the R900407424 suitable for mineral oil?
Yes. It is designed for mineral oil HLP/HLPD. For other fluids, check Bosch Rexroth data sheets and seal compatibility.
How does pilot-operated load holding differ from a standard check valve?
A standard check valve permits free flow in one direction and blocks reverse flow. The Z2S10 A1-3X also blocks reverse flow leak-free, but a pilot signal can open it to allow controlled reverse flow — essential for load holding and safe lowering.
How do I order or check stock?
Ask our team for availability and current lead times via the product page R900407424 Z2S10 A1-3X or use the CTA below.
Final CTA
Need the R900407424 Z2S10 A1-3X for your 2026 hydraulic project?
Request a quote or talk to our Bosch Rexroth specialists today.
