DUPLOMATiC RQA5-P5/1/I/42 Relief Valve
4 month ago
Product details
1. Model Code Breakdown (DSE3-A04/11N-D24K1)
【表格】
Code Description
DSE3 Series identifier (DSE series: High-pressure wet-armature directional valves for high-frequency switching)
A04 Valve configuration and position: - A: Two-position (2/2) - 04: Center-closed (P port blocked, A/B ports interconnected)
11N Port type and nominal size: - 11: ISO 4401 standard subplate mounting, 6-hole flange - N: Nominal diameter 11 mm (flow capacity ~80 L/min)
D24K1 Solenoid specifications: - D24: 24V DC voltage - K1: Manual override (K=manual, 1=single solenoid)
Additional Notes:
• Center-closed (A04): In neutral position, P port is blocked while A/B ports remain interconnected, suitable for hydraulic cylinder floating or pressure holding.
• Wet-armature solenoid: Coil is immersed in hydraulic oil for superior heat dissipation (lifespan ≥10 million cycles), but requires regular hydraulic oil replacement.
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2. Key Technical Specifications
【表格】
Parameter Specification
Rated Pressure 31.5 MPa (315 bar) (maximum operating pressure)
Flow Capacity 80 L/min (pressure drop ≤1 MPa at nominal diameter 11 mm)
Response Time ≤10 ms (full stroke from energization)
Leakage ≤30 cm³/min (internal leakage, P→T port)
Solenoid Power 24V DC, 8W (steady-state), peak ≤16W
Fluid Compatibility Mineral-based hydraulic oils, HFA/HFB water-based fluids (viscosity 10–400 cSt)
Temperature Range -25°C to +80°C (short-term up to +100°C)
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3. Structure and Operating Principle
• Valve Design:
• Two-position, four-way (2/4) spool valve with spring return.
• Neutral function:P port blocked, A/B ports interconnected(for cylinder floating or pressure retention).
• Solenoid Design:
• Wet-armature solenoid with oil-immersed coil for extended lifespan.
• Manual override (K1): Rotary handle for manual valve shifting during power failure or emergencies.
• Operation:
1. Energized State: Solenoid generates magnetic force, shifting the spool against spring tension to redirect flow.
2. De-energized State: Spring returns spool to neutral position (P blocked, A/B interconnected).
3. Manual Mode: Handle directly actuates spool position.
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4. Typical Applications
• Construction Machinery:
• Floating control of excavator boom/arm (neutral A/B interconnection enables free swing).
• Luffing mechanism safety holding in cranes (pressure retention during power loss).
• Industrial Equipment:
• Floating adjustment of injection molding machine clamping cylinders (neutral function avoids hydraulic shock).
• Rapid direction reversal in die-casting machines (response time ≤10 ms).
• General Systems:
• Closed-loop hydraulic circuits requiring cylinder floating.
• Hydraulic systems needing manual override during emergencies.
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5. Installation and Commissioning Guide
• Mounting Requirements:
• Vertical installation (spool axis vertical) to prevent lateral force-induced sticking.
• Solenoid oriented upward to minimize oil ingress into the coil (wet design optimized, but avoid prolonged tilting).
• Electrical Connection:
• 24V DC power supply; incorrect polarity may damage the solenoid.
• Recommend adding a flyback diode to suppress reverse EMF.
• Commissioning Steps:
1. Manually shift spool to neutral; verify stable system pressure (P blocked, A/B pressures equal).
2. Energize solenoid; test spool shifting and monitor A/B port pressure changes.
3. Adjust spring preload (if required) to ensure neutral position sealing.
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6. Common Faults and Solutions
【表格】
Symptom Probable Cause Solution
Spool Sticking Oil contamination, spring failure Clean spool, replace spring, filter hydraulic oil
High Leakage Seal degradation, valve scoring Replace O-rings, lap valve body mating surfaces
Solenoid Inaction Coil burnout, power failure Test coil resistance (≥8Ω), replace solenoid
Slow Response Low voltage, high oil viscosity Verify power stability, use low-temperature oil
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