An air receiver—also called a vessel or tank—is used to store compressed air before it enters a piping system or pneumatic equipment. It acts as a buffer between the compressor and fluctuations in pressure caused by varying demand.

Why do you need one?

Compressed air demand can vary due to factors like process changes, time of day, or unusual usage peaks. An air receiver stores compressed air to meet short-term peak demands that the compressor alone cannot satisfy. This ensures a consistent supply of air even when demand fluctuates.

The importance of pressure

The stored compressed air is only useful if its pressure meets the requirements of your process. It’s important to understand both your compressor’s output pressure and the pressure needed at the point of use. Also, consider how long the air receiver can supply air at the necessary pressure. Proper sizing is crucial. Air receivers should also have a pressure relief valve to release excess pressure safely.

Sizing an air receiver

A good rule of thumb is to allocate 3 to 4 gallons of tank volume per CFM (or 10 to 15 liters per liter/second) of compressed air. However, this may vary depending on the type of compressor and its application.

Energy savings

Using an air receiver enables fixed-speed (load/unload) compressors to operate with longer cycles and narrower pressure bands, reducing energy consumption. Running the compressor fewer but longer cycles also extends its service life.

With Variable Speed Drive compressors

Variable speed compressors adjust air production to match demand, but at very low loads, the compressor may stop running. An air receiver acts as a buffer, allowing for smaller tank sizes compared to fixed-speed compressors.

Process protection

An air receiver enhances process safety by providing a reserve of compressed air to safely shut down equipment in emergencies.

Tank installed or freestanding

Small air compressors are often tank-mounted, minimizing footprint—ideal for tight spaces. Larger compressors (above 35 hp or 26 kW) are better suited for freestanding air receivers, as tank-mounted setups can become top-heavy and unsafe.

Draining

Without an air dryer, moisture accumulates inside the air receiver. This must be drained regularly to prevent corrosion, clogged piping, damage to pneumatic equipment, and compromised product quality. Drain frequency depends on usage, with daily draining recommended, or more often if the compressor runs fully loaded for extended periods. Float, timer, or electronic drains can automate this task. Consult an air system expert for the best solution.

Conclusion

An air receiver is a vital component of any compressed air system. It balances supply with demand, ensures consistent pressure for critical processes, improves energy efficiency, and adds an important safety layer. Proper sizing, pressure control, and regular maintenance—especially draining—are essential for reliable operation and long-term performance.

Anpam Engineering specializes in customized air receiver solutions tailored to your needs. Whether you use fixed-speed or variable-speed compressors, or require tank-mounted or freestanding designs, our experts help you choose the right equipment for maximum reliability, safety, and efficiency. Contact us today to discuss your compressed air system requirements. To learn more about our products and services, visit our website or call +91 99428666660.