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Product details
1. Model Breakdown & Naming Convention
E-RA-LES-S-EP-01H/M 45
(ATOS models typically follow modular designations for function, structure, and interfaces. Below is a typical interpretation.)
• E: Electro-hydraulic (proportional control, distinguishing from mechanical/manual valves).
• RA: Valve series (RA series, potentially indicating "Rotary Actuator" or specific valve body structure).
• LES: Functional module (may include):
• L: Linear flow characteristic.
• E: Integrated electronic feedback.
• S: Safety-certified (e.g., ISO 13849 compliance).
• S: Interface type (e.g., threaded connection or port configuration).
• EP: Pressure rating (EP grade, nominal pressure 350 bar/5,000 psi—confirm with specifications).
• 01H: Spool/port configuration (Type 01 spool, "H" denotes high-pressure sealing or specific flow path design).
• M: Mounting style (flange-mounted, distinguishing from manifold-mounted options).
• 45: Nominal size (DN45 or 1.75 inches—verify with datasheet).
2. Core Features & Technical Highlights
• Proportional Control: Continuously adjusts port opening via 4-20mA or 0-10V DC signals for linear flow/pressure regulation.
• High-Frequency Response: Typical response time <30ms (step input), suitable for dynamic systems (e.g., injection molding, die-casting machines).
• Integrated Electronic Amplifier: Built-in signal processing supports PWM or analog inputs, reducing reliance on external controllers.
• Closed-Loop Feedback: Optional position sensors (e.g., LVDT) or pressure transducers enable high-precision control (accuracy ±0.5%).
• Bidirectional Control: Supports synchronous/differential control of double-acting cylinders with symmetrical flow paths to minimize pressure loss.
• High-Pressure Design: EP-rated for 350 bar continuous operation, ideal for construction machinery and metallurgical equipment.
3. Technical Specifications (Typical Values—Refer to Manual)
【表格】
Parameter Description
Nominal Diameter DN45 (or 1.75 inches)
Rated Flow 150 L/min (at ΔP=5 bar)
Max Pressure 350 bar (continuous) / 400 bar (peak)
Control Signal 4-20mA (recommended, anti-interference) or 0-10V DC
Response Time <30ms (step input, 10%-90%)
Hysteresis <0.8%
Linearity ±1.5%
Repeatability ±0.3%
Operating Temperature Oil: -20°C to +85°C / Ambient: -10°C to +50°C
Protection Rating IP65 (dust/waterproof)
Electrical Interface M12 connector or DIN 43650 standard
Weight ~8.5 kg (with electronics)
4. Application Scenarios
• Industrial Hydraulics:
• Injection molding machine screw speed/pressure control (improves part repeatability).
• Die-casting machine clamping force regulation (reduces mold wear).
• Construction Machinery:
• Excavator boom/bucket flow proportional control (15%+ energy savings).
• Crane luffing mechanism synchronization (prevents side loading).
• Automation Equipment:
• Robot joint force/speed closed-loop control (collision protection).
• Press machine pressure-displacement tracking (enhances assembly quality).
• Energy Sector:
• Wind turbine pitch system hydraulic drive (anti-wind load stability).
• Solar tracker angle adjustment (high-precision positioning).
5. Competitor Comparison
【表格】
Brand/Model Key Advantages
Rexroth 4WRPEH Integrated position sensor, closed-loop accuracy ±0.1%
Parker D1FP Ultra-low leakage (<0.3 L/min), built-in diagnostics
Moog G761 High-frequency response (>150Hz), servo-grade performance
Bosch Rexroth HED Cost-optimized, suitable for budget applications
6. Selection Considerations
• Pressure Matching: Confirm system max pressure ≤350 bar (select EP-H series, e.g., EP-420, for overpressure).
• Flow Requirements: Ensure 150 L/min rated flow is met (parallel multiple valves or larger sizes for excess flow).
• Media Compatibility: Use hydraulic oil compliant with ISO VG46 viscosity and zinc-based anti-wear additives (avoid water-based or phosphate ester fluids).
• Environmental Adaptability:
• Low-temperature environments (<-20°C) require optional heating modules (e.g., E-RA-LES-S-EP-01H/M-45-T).
• Vibration-prone settings (e.g., mining equipment) need reinforced mounting brackets.
• Control Signal Compatibility: Prioritize 4-20mA (anti-interference for long-distance) or 0-10V DC (PLC-direct compatibility).
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