Z2S6 Rexroth Pilot Check Valve 315 Bar 60L/min

Product Overview:

The Z2S and Z2FS series (featuring models such as Z2S6-1/64/V, Z2S10-1-20B, Z2S10-2-L3X, and Z2FS10-5-3X/V) are sandwich plate (modular) pilot-operated check valves and throttle check valves designed for leak-free position locking and exact speed control in high-pressure hydraulic circuits. Engineerd to match standard Bosch Rexroth mounting interfaces (ISO 4401-03 / CETOP 3 for Size 6 and ISO 4401-05 / CETOP 5 for Size 10), these valves serve as 100% direct drop-in replacements. Every unit undergoes 100% dynamic simulation testing under 315 bar working pressure to guarantee zero internal leakage, superior thermal stability, and maximum operational safety.

Technical Specifications

• Model Codes: Z2S6, Z2S10, Z2FS10 (e.g., Z2S6-1/64/V, Z2S10-1-20B, Z2FS10-5-3X/V)

• Mounting Interface: ISO 4401-03-02 (NG6 / CETOP 3) & ISO 4401-05-04 (NG10 / CETOP 5)

• Maximum Operating Pressure: 315 bar (4500 psi)

• Maximum Flow Capacity: 60 L/min for NG6; up to 160 L/min for NG10

• Cracking Pressure Options: 1.5 bar, 3.0 bar, 6.0 bar

• Internal Leakage Rate: Zero leakage (Metal-to-metal precision poppet design)

• Control Mechanism: Hydraulic pilot release (Z2S) / Socket screw throttle adjustment (Z2FS)

• Seal Options: FKM Viton (-20°C to +120°C, /V designation) or NBR Nitrile

• Unit Net Weight: Approx. 0.8 kg (NG6) / 2.6 kg (NG10)

Key Technical Advantages:

• 100% Direct Drop-in Interchangeability: Standardized sandwich envelope dimensions allow seamless installation on existing Rexroth-style manifold blocks without physical re-engineering.

• Case-Hardened Precision Poppet: Poppets and internal seats are heat-treated and micro-lapped to ensure a perfect metal-to-metal seal, completely eliminating cylinder drift under extreme holding loads.

• Decompression Shock Reduction: Optimized pilot piston ratio prevents sudden hydraulic shock and noise during pilot opening, protecting downstream pumps and pipe connections.

• 100% Factory Simulated Condition Testing: Every single valve is dynamically bench-tested at full rated pressure and verified for zero seat leakage prior to packaging.

Application Areas:

• Mobile Hydraulics: Outrigger stabilization and extension cylinder safety locking on cranes, excavators, and boom lifts.

• Industrial Pressing Machinery: Clamping pressure holding and anti-fall security systems for injection molding machines and stamping presses.

• Heavy Metallurgy Equipment: Cylinder position holding and hydraulic clamping manifolds in steel mills and heavy material handling.

Expert Maintenance Tips:

• Calibrated Mounting Bolt Torque: Always use a calibrated torque wrench during installation. Torque NG6 mounting bolts to 8.9 Nm and NG10 bolts to 15.5 Nm to prevent block distortion and poppet binding.

• Oil Cleanliness Management: Maintain fluid cleanliness to ISO 4406 19/16/13 or cleaner, utilizing 10-micron filtration to prevent fine abrasive particles from damaging the poppet seats.

• Verify Pilot Line Venting: Ensure that directional control valves vent the pilot supply line fully in their neutral position to allow complete seating of the pilot-operated check valve.