SUNZO Disc Springs for Hydraulic Systems: 500 N to 20 kN Axial Compression, 90% Preload Retention After 10⁶ Cycles, Corrosion Resistant SUS316 Stainless Steel
Product Details
| Axial Compression: | 500 N To 20 KN | Contact Pressure: | 15-35 MPa |
|---|---|---|---|
| Operating Pressure: | Up To 350 Bar | Dish Height-to-thickness Ratio: | 0.6-1.0 |
| Cone Angle: | 12°-15° | Preload Force Retention: | 90% After 10⁶ Cycles |
| Fatigue Resistance: | 300% Better Than Coil Springs | Ultimate Tensile Strength: | 1,800 MPa |
| Yield Strength: | 800 MPa (SUS316) | Quenching Temperature: | 860°C |
| Tempering Temperature: | 420°C | Salt Spray Resistance: | 500+ Hours (Zinc-phosphate) |
| Dacromet Protection: | 1,500-hour Salt Spray | Nickel Plating Thickness: | 10-15μm |
| Parallel Stack Load: | 8 KN (6x 12mm Springs) | Deflection Range: | 2.5mm |
| Dimensional Tolerance: | ±0.02mm On Thickness | Temperature Range: | -40°C To 120°C |
| Wear Reduction: | 40% | Material Options: | 50CrVA Alloy, SUS316 Stainless Steel |
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Product Description
SUNZO disc springs deliver precision-engineered preload solutions that maintain optimal sealing force across dynamic operating conditions in high-pressure hydraulic systems. These conical-shaped springs generate consistent axial compression (500 N to 20 kN) to ensure metal-to-seal contact pressures between 15-35 MPa—critical for preventing fluid leakage in hydraulic cylinders, directional control valves, and accumulator systems operating at pressures up to 350 bar.
The unique geometric design features optimized dish height-to-thickness ratios (0.6-1.0) and cone angles of 12°-15°, enabling SUNZO disc springs to maintain 90% of initial preload force even after 10⁶ compression cycles. This outperforms conventional coil springs by 300% in fatigue resistance.
Material Specifications:
- 50CrVA Alloy: Oil quenching at 860°C followed by tempering at 420°C to achieve 1,800 MPa ultimate tensile strength
- SUS316 Stainless Steel: Superior corrosion resistance with 800 MPa yield strength for marine and chemical hydraulic applications
| Coating Type | Performance | Application |
|---|---|---|
| Zinc-phosphate coating | 500+ hours salt spray resistance per ASTM B117 | Standard industrial hydraulic systems |
| Dacromet coating | 1,500-hour neutral salt spray protection | Offshore and subsea hydraulic equipment |
| Electroless nickel plating | 10-15μm thickness | Food-grade hydraulic applications requiring FDA compliance |
System engineers can configure multi-spring stacks in parallel (to increase load capacity) or series (to extend deflection range) to match specific pressure requirements. For example, a parallel stack of 6x 12mm diameter springs achieves 8 kN preload with 2.5mm deflection, ideal for high-flow directional control valves.
Finite Element Analysis (FEA) validated designs ensure compatibility with common seal materials including Nitrile (NBR), Viton® (FKM), and PTFE, preventing seal extrusion and reducing friction-induced wear by 40%.
SUNZO hydraulic disc springs comply with ISO 16148 and DIN 2092 standards, with 100% lot testing including load-deflection curve verification and dimensional inspection (±0.02mm tolerance on thickness).
Typical Applications:
- Hydraulic press cylinder seals
- Mobile equipment hydraulic manifolds
- Wind turbine pitch control systems
- Offshore drilling rig hydraulic actuators
By maintaining consistent sealing force across temperature fluctuations (-40°C to 120°C) and pressure transients, SUNZO disc springs reduce unplanned downtime by minimizing leakage-related failures. Our engineering team provides custom design services, including FEA simulation of preload decay and seal contact stress analysis, to optimize spring selection for your specific hydraulic system parameters.
Product Highlights
SUNZO disc springs ensure reliable hydraulic sealing with high fatigue resistance (300% better than coil springs), ISO/DIN certifications, and custom stack configurations. Options include corrosion-resistant coatings for harsh environments.
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