Z2S10B1-3X Rexroth Sandwich Check Valve 315bar

Product Overview

Models such as Z2S10B1-3X, Z2S6-1-6X, Z2S10-2-3X, Z2S10A1-3X and Z2FS series belong to the Bosch Rexroth sandwich-plate pilot-operated check valves and throttle check valves. Featuring seat-type design for leak-free locking, they comply with ISO 4401 mounting standards. Every unit undergoes rigorous 100% simulated operating-condition testing and offers excellent drop-in interchangeability for stacking directly between directional valves and subplates. Reliable pilot unlocking and optional throttling enable safe load holding and speed control in medium-to-high-pressure hydraulic systems.

Technical Specifications 

• Model examples: Z2S10B1-3X, Z2S6-1-6X, Z2S10-2-3X, Z2S10A1-3X, Z2FS6 series
• Valve type: Sandwich pilot-operated check valve (Z2S); sandwich throttle check valve (Z2FS)
• Nominal size: 6 = NG6; 10 = NG10
• Mounting interface: ISO 4401
• Maximum operating pressure: 315 bar
• Maximum flow: approx. 60–80 l/min (NG6); approx. 120 l/min (NG10)
• Cracking pressure: 1.5 / 3 / 6 / 10 bar (depending on model)
• Actuation: Pilot operated (hydraulic unlocking)
• Seal material: NBR or FKM
• Weight: approx. 0.8 kg (NG6); approx. 2.6–3 kg (NG10)
• Hydraulic fluid compatibility: HL, HLP, HLPD, HVLP, HVLPD, HFC, etc.

Key Technical Advantages

1. Seat-type leak-free locking: Hardened seat design achieves true zero leakage, reliably holding loads even after prolonged periods under pressure for high safety.
2. Sandwich modular design: Installs directly between directional valve and subplate/manifold, saving space and eliminating additional piping leakage points.
3. Excellent drop-in interchangeability: Strict compliance with ISO 4401 mounting face allows direct replacement of equivalent Rexroth sandwich valves, minimizing modification costs and downtime.
4. Pilot unlocking with optional throttling: Reliable hydraulic pilot release; Z2FS versions add adjustable throttling for speed control.
5. Precision machining and long service life: High-strength body and hardened internal components deliver strong contamination resistance and long-term reliability.

Application Areas

Injection moulding machines, die-casting machines, metal-forming equipment, machine-tool hydraulics, lifting platforms, mobile equipment, marine hydraulics and other medium-to-high-pressure circuits requiring safe load holding and speed control.

Expert Maintenance Tips

1. Ensure mounting surfaces are clean and flat before installation; fit seals correctly and tighten specified bolts evenly to the recommended torque to prevent external leakage.
2. Maintain recommended fluid cleanliness per ISO 4406; use hydraulic fluids compatible with the installed seal material. Check pilot oil supply before first start-up.
3. Ensure sufficient pilot pressure to overcome main-line pressure for reliable unlocking; periodically inspect for external leakage.
4. Clean and protect sealing surfaces during long-term storage; perform functional and sealing tests before recommissioning.
5. Do not disassemble seat and pilot components. Seal replacement or repairs should be performed only by technicians experienced with Rexroth products.