Solar tracker dampers play a critical role in maintaining system stability and performance. Among them, single-cylinder and dual-cylinder dampers are the two main structural types. This article explains their differences and why dual-cylinder dampers are increasingly becoming the preferred choice in the industry.
Early solar tracker systems often used single-cylinder (single-tube) dampers, which feature a single tube serving as both the working chamber and oil reservoir. However, practical use has revealed several significant disadvantages:
Shorter stroke at the same length, resulting in less effective energy absorption.
Weaker damping force, especially under high load conditions.
Lower lateral force resistance, which can reduce system stability under wind or uneven load.
No internal oil pressure relief design — sudden pressure spikes can stress rubber seals and increase the risk of failure.
No built-in oil redirection mechanism, making it harder for the system to return to equilibrium after impact.
Higher risk of oil leakage, especially when the piston rod faces downward.
Poor protection against outdoor conditions — many lack dust covers, or have poorly positioned ones, leaving the con rod exposed to dust and rain.
To address these challenges, the industry developed dual-cylinder (dual-tube) dampers, which offer a more advanced design and superior performance in solar tracking applications:
Longer Stroke at Same Length
The separate inner and outer tubes allow for a longer damping stroke, improving shock absorption.
Higher Damping Force and Lateral Stability
Especially suitable for solar trackers facing harsh environmental and mechanical conditions.
Built-In Oil Pressure Relief System
A one-way valve allows excess oil to move into the outer tube under sudden pressure spikes. This protects seals and improves product durability.
Automatic Oil Rebalancing
Once pressure stabilizes, oil flows back into the inner tube, maintaining internal equilibrium without user intervention.
Dust Cover (Facing Downward)
Comes with a downward-facing dust cover by default, providing excellent protection for the con rod in harsh outdoor environments (rain, sand, dust).
Reduced Oil Leakage Risk
Thanks to its upright installation (con rod up) and enclosed structure, the damper minimizes leakage issues.
Maintenance-Free Design
Built for durability and reliability, dual-cylinder dampers require no regular maintenance, saving time and cost in long-term operation.
For solar tracker applications demanding long life, low maintenance, and high reliability, dual-cylinder dampers clearly outperform their single-cylinder counterparts. With a more robust design, internal pressure management, and true maintenance-free operation, they offer:
Better damping performance
Higher safety under load
Long-term cost savings
Our team specializes in damper technology for solar tracker systems. Whether you’re seeking technical specs, product comparisons, or installation support, we’re here to help.
