Atos RZMO Proportional Relief Valve | RZMO-P1-010 RZMO-REB-P-NP | Hydraulic Pressure Control Valve

The RZMO Series proportional relief valves from Chengyuan Hydraulic are high-precision electro-hydraulic control components fully compatible with Atos industrial standards. These valves regulate system pressure in direct proportion to the input electrical signal, making them indispensable for hydraulic circuits requiring frequent pressure variations and precise load compensation. For core models like RZMO-P1-010/315 and RZMO-REB-P-NP-010/210, we utilize high-pressure proportional solenoids and micro-ground spools. Every RZMO valve undergoes 100% dynamic response and linearity testing before delivery to ensure minimal pressure hysteresis, guaranteeing 100% original-place interchangeability.

Technical Specifications :

• Series Model: RZMO Series (Poppet-type Proportional Relief)

• Size: 010 (ISO 4401 mounting interface)

• Max Pressure Ranges: 100 bar, 210 bar, 315 bar

• Max Flow Rate: 40 L/min

• Control Signals: 0-10V DC / 4-20mA (depending on configuration)

• Amplifier Options: P1 (External), REB (Integrated Analog), RES (Integrated Digital)

• Repeatability: < ±1% of max setting

• Hysteresis: ≤ 1.5% – 3% (depending on model)

Key Technical Advantages:

• High Dynamic Linear Control: The RZMO series features an optimized pilot poppet structure combined with high-performance solenoids, allowing smooth pressure transitions. Its exceptional linearity between signal and output simplifies PLC control logic significantly.

• Integrated Electronics (REB/RES): For REB models, the control electronics are integrated directly onto the valve. This reduces wiring complexity and ensures the circuit is factory-calibrated to resist electromagnetic interference, maintaining signal integrity.

• Heavy-Duty Proportional Solenoids: Using wet-type solenoids, the moving armature operates in hydraulic oil for optimal lubrication and cooling. The valve body is crafted from high-strength castings capable of withstanding continuous 315 bar pressure.

• Clog-Resistant Pilot Damping: The pilot oil circuit includes a precision damping mechanism. This enhances dynamic response speed while the specialized flow path design reduces sensitivity to oil contaminants, extending operational life.

Application Areas:

• Injection Molding: Precise multi-stage pressure control during injection and clamping cycles.

• Hydraulic Presses: Automatic adjustment of pressing force to prevent tool damage.

• Test Benches: Simulating dynamic pressure environments for hydraulic component evaluation.

Expert Maintenance Tips:

• Drain Port (Port Y) Management: As a pilot-operated valve, ensure the external drain (Port Y) backpressure is constant and near zero. High backpressure will cause pressure set-point drift or sluggish response.

• Oil Cleanliness Standards: Proportional valves are highly sensitive to contamination. We recommend a filtration rating of at least 10μm to maintain oil cleanliness at NAS Class 7 or better.

• Wiring Polarity: For integrated amplifier models, strictly verify the 24V DC polarity and shielding grounding before power-up. Incorrect wiring can permanently damage the integrated PCB.