I. Basic Functions
1. Pressure Control
The primary function of the relief valve is to regulate hydraulic system pressure, preventing equipment damage caused by excessive pressure. When system pressure exceeds the set value, the relief valve opens to redirect surplus hydraulic fluid back to the tank, maintaining stable pressure.
2. Safety Protection
As a safety device in hydraulic systems, the relief valve promptly relieves pressure during abnormal pressure surges, protecting the system from damage.
II. Model Interpretation
• DR10: Typically indicates the valve series or type, representing a specific design or specification.
• 1: May denote the valve’s port size or dimensional rating.
• 30: Could represent the pressure adjustment range or maximum operating pressure (unit: MPa or bar; refer to manufacturer’s data for confirmation).
• 100Y: May specify a particular configuration or material, where "Y" likely indicates seal material or structural features (e.g., fluororubber seals).
III. Technical Features
1. Pilot-Operated Structure
Some DR10-1-30/100Y relief valves adopt a pilot-operated design, offering higher sensitivity and precise pressure control. The pilot valve governs the main valve’s opening/closing, enabling stable pressure regulation.
2. High-Pressure Rating
Based on the model numbers, this valve likely supports high-pressure hydraulic systems, adapting to demanding applications.
3. Customizable Configurations
Available in multiple configurations (e.g., varying pressure ranges, seal materials) to meet diverse operational requirements.
IV. Applications
1. Injection Molding Machines
Used to control main pump pressure in hydraulic systems, ensuring stable pressure for consistent injection molding processes.
2. Die-Casting Machines
Regulates pressure to prevent equipment damage or casting defects caused by excessive system pressure.
3. Construction Machinery
Essential for pressure control in excavators, loaders, and other equipment, ensuring stable operation under varying conditions.
V. Selection & Maintenance
Selection Guidelines:
• Choose a pressure range and rating aligned with system requirements.
• Verify compatibility with hydraulic fluid type and temperature range.
• Select a model based on installation space and port size constraints.
Maintenance Recommendations:
• Periodic Calibration: Check and adjust the set pressure regularly to ensure accuracy.
• Cleanliness: Remove oil contaminants and debris around the valve to prevent malfunctions.
• Seal Inspection: Replace aged or damaged seals (e.g., fluororubber "Y" seals) promptly.
• Functional Testing: Verify smooth operation via pressure tests during routine maintenance.
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DR10‑1‑30/100Y Hydraulic Relief Valve
Basic Information
- Model: DR10‑1‑30/100Y
- Type: Pilot‑operated Pressure Reducing / Relief Valve (common used as pressure relief valve in industrial hydraulic systems)
- Application: Widely used in injection molding machines, hydraulic presses, engineering machinery, hydraulic stations, to limit system pressure, protect hydraulic components and stabilize pressure.
Technical Parameters
- Nominal Diameter: 10mm
- Pressure Range: 0.6–10 MPa (100Y means maximum regulating pressure 10MPa)
- Rated Flow: 40–80 L/min
- Working Medium: 46# anti‑wear hydraulic oil
- Working Temperature: -20℃ ~ 80℃
- Mounting Type: Plate‑mounted (standard installation hole conforms to European standard)
Structure & Material
- Valve Body: High‑strength cast iron / alloy steel
- Spool & Sleeve: Alloy steel, quenched and precision‑ground, wear‑resistant
- Seals: Nitrile rubber, oil‑resistant, high‑temperature resistant
- Adjustment Mode: Manual pressure adjustment via handwheel / screw
Core Function
1. Limit maximum system pressure to avoid overload damage to pumps, cylinders and valves
2. Stabilize working pressure of hydraulic circuit
3. Unload pressure when system pressure exceeds set value
Common Faults & Phenomena
1. Pressure cannot be adjusted: Spool stuck, spring fatigue or broken
2. Pressure unstable: Internal leakage, dirty oil causing spool jitter
3. Oil leakage: Seal aging, loose installation
4. System noise abnormal: Relief valve frequently opening and closing
Installation & Maintenance
1. Install on hydraulic manifold block, pay attention to oil inlet and outlet direction
2. Adjust pressure slowly after startup, avoid rapid over‑pressure adjustment
3. Keep hydraulic oil clean; regularly check and replace seals
4. Not suitable for high‑pollution hydraulic oil environment without filter protection
