SUNZO Disc Springs for Hydraulic Systems: 500 N to 20 kN Axial Compression, 90% Preload Retention After 10⁶ Cycles, Corrosion Resistant SUS316 Stainless Steel
sus316 disc spring
,sus316 bearing spring
,corrosion resistant disc spring
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.
