ATOS RZMO-A-030/210 20 Proportional Relief Valve

2 month ago

10 0 

Ningbo Hengnuo Hydraulic Drive Co.,Ltd

4 year

Product details

1. Model Code Explanation for RZMO-A-030/210 20

Code Description

RZMO Subplate-mounted proportional relief valve; HZMO stands for sandwich-type version

A Without built-in pressure sensor and integrated drive amplifier; external separate amplifier (E-MI-AC series) is required

030 P port for pressure regulation, T port for tank return; pilot-operated design, NG06/D03 size complying with ISO4401 mounting standard

210 Rated adjustable pressure range: 0~210 bar (21 MPa)

20 Design revision and production batch code

Origin: ATOS, Italy

2. Main Technical Specifications

2.1 Pressure

- Adjustable working pressure: 0～210 bar; maximum valve withstand pressure: 350 bar

2.2 Flow Rate

- Rated maximum flow: 40 L/min; minimum stable control flow: 2.5 L/min

2.3 Control Accuracy

- Linearity ≤3%FS; Hysteresis ≤2%FS; Repeatability ≤2%FS across full range

2.4 Electrical Configuration

- Standard solenoid coil: DC24V; standard control signal: 0~10 VDC (4~20 mA available as optional)

- Type A excludes on-board driver; external ATOS proportional amplifier E-MI-AC/EB is mandatory for operation

2.5 Fluid & Ambient Conditions

- Compatible fluids: Mineral hydraulic oil, water-glycol; kinematic viscosity: 15~100 mm²/s @40℃

- Operating temperature: -20℃ ~ +70℃; standard NBR nitrile rubber seals, FKM fluorine rubber seals available on customization

2.6 Weight: approx. 2.8 kg

3. Construction & Operating Principle

1. Combined structure of pilot spool valve plus main poppet valve: Proportional solenoid drives pilot regulating spool with built-in pilot flow compensation for outstanding pressure stability.

2. Stepless electrical pressure regulation: 0~10V analog input from amplifier generates corresponding solenoid thrust to continuously adjust relief cracking pressure, realizing open-loop or closed-loop stepless system pressure control.

3. Three core hydraulic functions: Overflow protection against system overload, constant system pressure holding, remote unloading via solenoid valve connected to remote control port.

4. Matching Components for Selection

- Valve body: RZMO-A-030/210 20

- Mandatory external drive: E-MI-AC-01F/EB amplifier with DIN 7-pin connector wiring

- Mounting: Special subplate for NG06 (D03 standard)

5. Application Fields

Injection molding machines, hydraulic presses, die-casting machines, construction machinery, metallurgical forging equipment and hydraulic test benches, applied for precise stepless pressure regulation and overload safeguard of hydraulic systems.

6. Differences within Same Product Series

- RZMO-A: No integrated driver (this model);

- RZMO-AE: With built-in analog amplifier;

- RZMO-AES: With integrated digital bus amplifier;

- HZMO-A: Sandwich mounted relief valve.

I. Product Overview

TheATOS RZMO-A-030/210 20is a high-performance proportional relief valve manufactured by ATOS, a renowned Italian hydraulic component manufacturer. Utilizing advanced electro-hydraulic proportional technology, this valve enables continuous proportional adjustment of hydraulic system pressure, making it widely applicable in industrial automation, construction machinery, metallurgical equipment, plastic machinery, and other fields.

------

II. Product Features

1. High-Precision Control

• Control accuracy up to ±1%, ensuring stable pressure output under varying operating conditions.

• Hysteresis (max. % of adjusted pressure) ≤ 2%, linearity (max. % of adjusted pressure) ≤ 3%, repeatability (max. % of adjusted pressure) ≤ 2%.

2. Fast Response

• Response time < 50 ms (0-90% step signal), enabling rapid adaptation to system load changes and minimizing pressure fluctuations.

3. Pressure Compensation Function

• Built-in pressure compensation mechanism maintains stable set pressure despite flow variations, preventing pressure drift caused by flow changes.

4. Modular Design

• Compact structure for easy installation and maintenance.

• Multiple mounting options compliant with ISO 4401 standards for seamless integration into existing systems.

5. High Reliability

• Constructed with wear-resistant materials and precision manufacturing processes for extended service life.

• Stable performance across a wide temperature range (-20°C to +70°C), adapting to harsh operating environments.

6. Energy-Efficient Design

• Low-power solenoid and optimized hydraulic flow paths reduce energy loss, improving system efficiency.

------

III. Technical Specifications

• Model: RZMO-A-030/210 20

• Operating Pressure Range: 0.5 MPa to 31.5 MPa (some models support up to 420 bar)

• Flow Range: 30 L/min to 200 L/min (depending on model and port size)

• Control Signal: 0-10 V DC or 4-20 mA

• Response Time: < 50 ms (0-90% step signal)

• Operating Temperature: -20°C to +70°C (hydraulic oil temperature)

• Media Viscosity: 20-380 cSt

• Mounting Type: Subplate mounting (ISO 4401 compliant)

• Protection Rating: IP65 (dust- and water-resistant)

------

IV. Working Principle

TheATOS RZMO-A-030/210 20proportional relief valve receives an external electrical signal (typically a standard 0-10 V or 4-20 mA signal). The proportional solenoid generates a thrust proportional to the signal, driving the spool to move. The spool displacement adjusts the valve port opening, thereby regulating the output pressure. An integrated position sensor continuously monitors the spool position and feeds the signal back to the controller, forming a closed-loop control system to maintain stable output pressure at the set value.

------

V. Applications

TheATOS RZMO-A-030/210 20proportional relief valve is widely used in hydraulic systems requiring precise pressure control, such as:

• Injection Molding Machines: For controlling injection and holding pressures to improve product quality.

• Machine Tools: For regulating feed system pressure to achieve precision machining.

• Metallurgical Equipment: For controlling roll gap pressure to ensure rolling accuracy.

• Construction Machinery: For managing actuator pressure to enhance operational efficiency.