Air Suspension: Tank & Compressor Setup
Air suspension systems have become increasingly popular, offering a blend of ride comfort, adjustability, and aesthetic appeal. While the bags themselves are a crucial component, the air delivery system – specifically the tank and compressor – is the heart of the operation. Understanding how these components work together is essential for anyone considering installing or maintaining an air suspension setup. This article will delve into the specifics of air suspension tanks and compressors, covering sizing, types, installation considerations, and common issues.
The primary function of an air suspension system is to replace traditional steel springs with air springs, often referred to as air bags. These bags provide a variable spring rate, allowing you to adjust the vehicle’s ride height and stiffness. However, air bags require a consistent supply of compressed air, which is where the compressor and tank come into play. The compressor generates the air pressure, and the tank stores it, providing a reserve for quick adjustments and sustained operation.
Understanding Air Suspension Tanks
The air tank acts as a reservoir, smoothing out the compressor’s output and providing a readily available supply of compressed air. Without a tank, the compressor would need to run constantly to maintain pressure, leading to overheating and reduced lifespan. Several factors influence tank selection:
- Capacity: Tank size is measured in gallons. Larger tanks offer longer run times and can handle more frequent adjustments, but they also take longer to fill. The ideal size depends on the vehicle’s weight, the number of air bags, and the intended use.
- Material: Tanks are typically made from aluminum or steel. Aluminum is lighter and resists corrosion, making it a popular choice. Steel is more durable but heavier and prone to rust if not properly coated.
- Shape: Tanks come in various shapes, including cylindrical, rectangular, and donut-shaped. The shape often dictates mounting options and available space.
- Pressure Rating: Ensure the tank’s pressure rating exceeds the maximum pressure your compressor can produce.
Proper tank placement is also crucial. It should be securely mounted in a location that protects it from damage and allows for easy access for maintenance. Consider the weight distribution and ensure the mounting points can handle the tank’s filled weight. You might also want to consider how the tank will affect your vehicle's handling characteristics.
Choosing the Right Air Suspension Compressor
The compressor is responsible for generating the compressed air that powers the system. Several types of compressors are commonly used in air suspension setups:
- Viair: Viair is a well-known brand specializing in air compressors for automotive applications. They offer a wide range of compressors with varying CFM (cubic feet per minute) and duty cycles.
- VIAIR Virtual Tank: These compressors are designed to operate without a separate tank, offering a compact and efficient solution.
- SBC: SBC compressors are known for their robust construction and high output.
- York: York compressors are typically used in heavy-duty applications and offer exceptional performance.
When selecting a compressor, consider the following:
- CFM: CFM indicates the volume of air the compressor can deliver per minute. Higher CFM means faster bag filling and quicker adjustments.
- Duty Cycle: The duty cycle represents the percentage of time the compressor can run continuously without overheating. A higher duty cycle is essential for frequent adjustments or heavy use.
- Voltage: Compressors are available in 12V and 24V configurations. Choose the voltage that matches your vehicle’s electrical system.
- Noise Level: Some compressors are significantly louder than others. Consider the noise level if you prioritize a quiet operation.
Installation Considerations
Installing an air suspension tank and compressor requires careful planning and execution. Here are some key considerations:
- Wiring: Use appropriately sized wiring to handle the compressor’s current draw. Include a fuse or circuit breaker to protect the electrical system.
- Air Lines: Use DOT-approved air lines designed for air suspension systems. Ensure the lines are securely connected to prevent leaks.
- Moisture Control: Install a moisture separator and filter to remove water and contaminants from the air supply. This will prolong the life of the air bags and other components.
- Pressure Switch: A pressure switch controls the compressor, turning it on and off to maintain the desired pressure range.
- Relay: A relay is often used to switch the high current draw of the compressor, protecting the pressure switch and wiring.
It’s often beneficial to consult with a professional installer, especially if you’re unfamiliar with automotive electrical systems or air suspension components. Incorrect installation can lead to system failures or even safety hazards. Understanding the basics of automotive electrical systems is a plus.
Common Issues and Troubleshooting
Like any mechanical system, air suspension setups can experience issues. Here are some common problems and potential solutions:
- Air Leaks: Check all air lines, fittings, and connections for leaks. Use soapy water to identify leaks – bubbles will form at the leak source.
- Compressor Overheating: Ensure the compressor has adequate ventilation and is not running excessively. Check the duty cycle and consider upgrading to a compressor with a higher duty cycle if necessary.
- Tank Not Filling: Check the compressor, pressure switch, and air lines for obstructions or malfunctions.
- Slow Bag Inflation: This could indicate a weak compressor, a clogged air filter, or a leak in the system.
- Pressure Switch Failure: Replace the pressure switch if it’s not functioning correctly.
Conclusion
The air suspension tank and compressor are critical components of a functional and reliable air suspension system. Choosing the right components, installing them correctly, and performing regular maintenance are essential for optimal performance and longevity. By understanding the principles outlined in this article, you can ensure your air suspension system delivers the ride comfort, adjustability, and aesthetic appeal you desire. Proper maintenance will help avoid costly repairs down the road.
Frequently Asked Questions
What size air tank do I need for my air suspension?
The ideal tank size depends on your vehicle’s weight, the number of air bags, and how often you plan to adjust the ride height. A general guideline is 5-10 gallons for smaller vehicles and 10-20 gallons for larger trucks or SUVs. Consider your usage patterns – more frequent adjustments require a larger tank.
How often will my compressor run?
The compressor’s run time depends on the tank size, the air leaks in the system, and how often you adjust the ride height. A properly sized tank and a leak-free system should minimize compressor run time. A good pressure switch setting will also help regulate compressor operation.
Can I use a standard air compressor for air suspension?
No, standard air compressors are not designed for the continuous duty cycle and specific pressure requirements of air suspension systems. Automotive-specific air compressors, like those from Viair or SBC, are engineered to withstand the demands of this application.
What is a moisture separator and why is it important?
A moisture separator removes water and contaminants from the compressed air. Water can damage air bags and other components, leading to premature failure. A moisture separator is a crucial component for maintaining the longevity of your air suspension system.
How can I diagnose an air leak in my system?
The easiest way to diagnose an air leak is to use soapy water. Apply the soapy water to all air lines, fittings, and connections. Bubbles will form at the source of the leak. You can also use an air leak detector, which is a specialized tool for pinpointing leaks.