28 products
An air compressor is a pneumatic device that converts power into potential energy stored in pressurised air. This is achieved by utilising a pump powered by either an electric motor or a diesel engine. In other words, air compressors convert one form of energy into another form, which can be used straight away or stored and used later when required.
Air compressors have many uses such as spray painting, tyre inflation, nailing, stapling, sanding, drilling, cutting, grinding air tools and various industrial equipment controls. Their applications can range from DIY projects around the home to large industrial environments.
The size of air compressors you require will depend on your intended use. Luckily, we stock air compressors in all sizes, from small devices ideal for pumping up a tyre to huge indsutrial air compressors.
To understand air compressors, it is helpful to know the physics behind compressed air. Compressed air is like regular (atmospheric) air forced into a much smaller space. This results in the air molecules speeding up creating kinetic energy. This kinetic energy can be used right away or stored for later use.
Once the air compressor is turned on and running, the pump sucks air in via the intake and pumps it into the storage tank known as an “air receiver” at a higher pressure. This pressure is typically 8 or 10 times higher than atmospheric pressure resulting in pressures of 8 bar (116psi) and 10 bar (145psi). The air compressor shuts off when the air receiver pressure has reached its target pressure. The compressed air is stored in the tank ready for immediate use or until called into use. The compressed air is released from the air receiver at the desired pressure, which can be regulated, thus generating power. When the air receiver pressure drops to its lower limit (cut-in pressure), a switch automatically triggers the compressor to turn on again and re-pressurise the receiver.
All air compressors at Engweld are either belt driven or direct-drive. A belt-driven air compressor consists of a belt that is connected to the motor of the compressor pump. When the motor runs, the belt turns, powering the pump to the air compressor. In a direct-drive air compressor, the crankshaft is connected directly to the compressor’s motor shaft.
Direct-drive air compressors are suitable when factors like reliability, ease of operation, cost-effectiveness, and power are important. They are normally designed for home use, hobbyists, DIY, and semi-professional applications.
Belt-driven compressors are a better choice when the application requires higher air volumes and longer duty cycle run times. Belt drive compressors are slower running which reduces noise and also increases the lifespan of the compressor when compared to direct drive alternatives. Belt drive compressors are designed for heavy-duty usage making them more suitable for workshops and industrial environments.
For more helping choosing the right air compressor for your needs, check out our Air Compressor Buying Guide
If you need any further information or assistance in choosing the right air compressor for your job, contact us at any time - Contact Us - Engweld
