Aeration | Parts and Accessories
Compressors and air pumps
Compressor types have changed dramatically over the last two decades. Not long ago, most industrial aeration systems were using rotary lobe blowers or positive displacement blower or centrifugal impeller systems using sacrificial vanes. For small applications, the diaphragm and rocking pistons were common too. Although these can still be found, better and more efficient systems have replaced them and we have done the same. We know compressors and we work with manufacturers to offer the best in the industry. Right now most small systems are most often diaphragm and piston compressors while medium to large systems are rotary claw or rotary screws models.
Upgrading these into your operation and matching with better air diffusion systems like bubble tubing, may save you large amount of operating cost in the near future. Call us to discuss your air system so we can help you compare with what we offer.
Rotary Claw Compressors
They are the work horse of our industrial systems. They provide a nice choice of pressure up to 31 psi or 2.14 bar and can push up to 200 cfm or 5.66m³ per minute.
These air pumps are all German engineered, built for continuous duty and quiet operation. Maintenance is limited to changing air filters and making an oil change once every 5 years. They are truly workhorses for your aeration project and are integral part of our CanadianAir Diffusion Systems and are used for large deicing projects.
We work with two manufacturers capable of offering you services worldwide:
- Busch Vacuum Pumps makes the Rotary Claw Mink series
- Elmo Rietschle makes the C-Series Claw compressors.
Rotary Screw Compressors
These unit are preferred choice for high volume, higher pressure operations. They are found in many places in the industrial sector and are very specific to a client’s need.
Many manufacturers will make them like Aerzen, Kaeser, Busch and Elmo Rietschle but are not limited to those.
Rocking Piston Compressors
Ten years ago, it was quite rare to see someone use a rocking piston compressor for lake and pond aeration, but gradually they became the heart and soul of a multitude of new design and new brands of aeration systems. The rocking piston technology is simple, oil less and very durable. They are mostly devised in two groups, single piston and dual pistons compressors.
The single pistons are either 1/4HP or 1/3HP, while the dual pistons are 1/2HP and 3/4HP. Air pressures range from a maximum of 25 to 50 psi or 1.72 bar to 3.45 bar with the exceptional model capable of doing up to 100 psi or 6.89 bar. The more pressure the lower the air flow. Air flows are ranging from 2-8 cfm depending on model. The original brands were Thomas and Gast, but now they can be found under names like Sweetwater, Brockwood, Matala, Stratus and Tech-Aire rocking piston compressors. They all share a common principle of operation and are great when coupled to various types of air diffusers.
Rotary Vane Compressors
Rotary vane compressors likely deserve a seat in the museum of aeration systems. They were the core of all those air stone systems that were originally sold starting in the 1970’s. Many older aeration businesses started out with them and launched a revolution in pond management. They are still used today but have limited pressure capacity rarely exceeding 10-15 psi or 0.69-1.03 bar in the small units and 20-21 psi or 1.38-1.45 bar in the industrial range. The sacrificial carbon vanes need to be replaced on a regular basis. Carbon vane dust can also be a problem in diffusers over time. Rotary vane compressors are typically two types:
- the smaller models 1/4HP, 1/3HP, 1/2HP, 3/4HP up to 1.5HP capable of 3 to 12 cfm or 0.08 to 0.34m³ per minute
- the industrial models 5HP, 7.5HP, 10HP or larger capable of up to 100 cfm, 2.83m³ per minute or so.
Only the larger model can produce the 20 psi or 1.38 bar. The vane replacement is often once every year for continuous usage.
The main manufacturers we worked with are GAST, Thomas, Sweetwater, Busch and Becker, these last ones being solid industrial systems.
Rotary Vane Submersible Compressors
Rotary vane submersible compressors are a novelty air pump that needs to be submerged to be cooled. It has a market goal to be inside wastewater collection tank. They are manufactured by Becker in Germany and are limited to small air flow not exceeding 5 cfm or 0.14 m³ per minute and pressure up to 15 psi 1.03 bar.
Diaphragm linear air pumps and Diaphragm compressors
Diaphragm pumps are often called linear air pump; most people recognize them as aquarium style air pumps or air compressors. They use an electro-magnetic system to oscillate their diaphragm and create a steady air flow. They are simple yet very durable and are the most silent way to create air pressure. But silence has its limitation and they can only provide a very low pressure rarely exceeding 6-7 psi or 0.41-0.48 bar for the larger units and mostly rated for a 3-4 psi or 0.21-0.28 bar operation. With the proper air diffusers, they are ideal for shallow water gardens. We have sold numerous diaphragm pumps over the years and one story that comes often is that people are lured to them for their silent operation, but misjudge the water depth of their ponds making them break diaphragm on a regular basis. Trust our salespeople to offer you the right system always.
The main brands and manufacturers are SECOH, PPM, Sweetwater, Matala, GAST, HIBLOW, Kam-Air, Alita, Bibus and many more. Our shop can repair most of them.
The diaphragm compressor is not a new technology but it is designed to give you more pressure, but not necessarily more air flow. Our main flexible membrane piston compressors are CDI systems that are small units designed to provide less air flow at a higher pressure of 20psi or 1.38 bar.
Many models are available and certain industrial applications use large ones for specific applications. We have sold and maintained mostly the small units that were less than 1/2HP for our projects.
Flexible Membrane Diaphragm compressor manufacturers are GAST, GD Thomas and KNF to name a few.