Rexroth Z2S 16 Series Hydraulic Valve

Description

The Rexroth Z 2 S 16-1-51 is a high-performance, pilot-operated check valve with a sandwich plate design. As part of the Z2S family, it is engineered for reliable, leakage-free blocking of one or two actuator ports, making it ideal for load-holding applications in industrial hydraulic systems. Its robust construction ensures a long service life even under demanding conditions.

Specifications

• Manufacturer: Rexroth (Bosch Rexroth AG)
• Type: Z 2 S 16-1-51
• Material Number: R900328797
• Component Series: 5X (51)
• Size: 16 (NG16 / CETOP 7)
• Maximum Operating Pressure: 315 bar (4568 PSI)
• Maximum Flow: 250 l/min
• Hydraulic Fluid: Mineral oil (HL, HLP) according to DIN 51524

Label Info

• MNR: R900328797
• FD: 08W38
• Model: Z 2 S 16-1-51

Application

This valve is typically used in industrial machinery, presses, injection molding machines, and any hydraulic circuit that requires secure load holding or the prevention of actuator creep. It is mounted in a valve stack between a directional valve and the subplate.

Country of Origin

Made in Germany.

CO2 Impact

Reusing this component saves approximately 12.4 kg of CO2 compared to manufacturing a new one. This is a significant contribution to sustainable industrial operations.

Availability

This item is a tested, used part in good working condition. Order now from PLC2Day for expert support and fast delivery.

FAQ

This part of the model code specifies the valve's configuration. In this case, it typically indicates the channels where the check function is applied (e.g., in port A and B) and the cracking pressure of the check valves.

This depends on the seal material. The standard NBR seals are compatible with mineral oils (HL, HLP). For use with biodegradable fluids or high-temperature applications, FKM (Viton) seals are typically required. The seal kit can often be replaced to suit the application.

It should be mounted between a directional control valve and a subplate or another valve in the stack. Ensure all surfaces are perfectly clean, O-rings are correctly placed in their grooves, and the mounting bolts are tightened to the manufacturer's specified torque in a criss-cross pattern to ensure an even seal.

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Last Update: Friday, March 13, 2026