Atlas Load relief valve2202251255 High Quality Screw Air Compressor Parts Wholesalele
Load Relief Valve – Product Overview
Product Overview
A Load Relief Valve (also called a Load-Holding Valve or Overcenter Valve) is a critical hydraulic component designed to maintain backpressure and safely control loads in hydraulic systems. It prevents uncontrolled movement of suspended or driven loads by providing controlled pressure release, ensuring operational safety in heavy machinery and mobile equipment.
Key Features
✔ Load-Holding Safety – Prevents runaway loads
✔ Controlled Motion – Enables smooth lowering/stopping
✔ Pressure Compensation – Maintains consistent performance
✔ Compact & Robust – Designed for harsh environments
✔ Fail-Safe Operation – Mechanical design (no external power)
Technical Parameters Table
| Parameter | Description | Specifications |
|---|---|---|
| Type | Pilot-operated, Direct-acting, Counterbalance | Based on application |
| Port Size | Inlet/Outlet Connections | 1/4" to 2" (DN8 to DN50) |
| Max Pressure | Operating Pressure Range | 50–5000 psi (3.5–350 bar) |
| Flow Capacity | Maximum Flow Rate | 5–200 GPM (20–750 LPM) |
| Cracking Pressure | Valve Activation Pressure | 50–500 psi (3.5–35 bar) adjustable |
| Pressure Adjustment | Setting Range | 10–3000 psi (0.7–210 bar) |
| Response Time | Opening/Closing Speed | <100 ms (fast-acting models) |
| Body Material | Construction Material | Carbon Steel, Stainless Steel |
| Seal Material | Sealing Components | NBR, FKM, Polyurethane |
| Temperature Range | Operational Limits | -40°F to 250°F (-40°C to 120°C) |
| Mounting | Installation Options | In-line, Subplate, Cartridge |
| Certifications | Standards Compliance | ISO 4401, NFPA, CE |
Applications
✔ Mobile Equipment – Cranes, excavators, aerial platforms
✔ Industrial Machinery – Presses, lifts, winches
✔ Marine Systems – Offshore equipment, davits
✔ Energy Sector – Wind turbine pitch control
✔ Safety-Critical Systems – Load suspension, braking
Benefits
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Prevents Load Dropping – Mechanical backup even if hydraulic pressure is lost
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Energy Efficient – Reduces pump load when holding
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Smooth Control – Eliminates jerky movements during load lowering
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Maintenance-Friendly – Field-adjustable settings
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Long Service Life – Hardened surfaces for wear resistance
Selection Guide
| Application | Recommended Type | Key Feature |
|---|---|---|
| Mobile Cranes | Pilot-operated, High-flow | Handles dynamic loads |
| Hydraulic Presses | Direct-acting, Precision | Fine pressure control |
| Offshore Equipment | Corrosion-resistant | 316SS body, seawater-resistant |
| Forestry Machinery | Shock-resistant | Reinforced seals |
Need more details? Ask about:
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Brand-specific compatibility
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Troubleshooting common issues
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Custom pressure/flow configurations
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Integration with hydraulic circuits
Get in Touch
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