Thousands of companies worldwide have looked to portable air compressors to satisfy their compressed air requirements. Renowned for their reliability in the most hot, humid and dusty conditions, the WENDEL range deliver the high performance, features and power to suit any construction, mining or industrial application in Australia.

With a capacity of 105 to 320 cfm and a pressure range of 100 – 150 psi (8 Bar standard), there is sure to be a WENDEL portable compressor to suit your needs.

Powered by Deutz German & Kubota Japanese engines, these powerful, mobile machines comes in four output models configurations ranging including single-axle trailer or base mounted to install on the back of a flat bed or truck.

Designed for continuous duty in Australian conditions. Our trailer mounted towable units come with lights installed.

Portable Air: Diesel Air Compressors

Portable Diesel Air Compressors 

105cfm to 320cfm

Quality, Peformance, Reliable


Deutz German or Kubota Japanese Engines. Compressor manufactured in Europe specifically designed for Australian conditions. Our compressors are ready to go, trailer mounted with light. They will need to be registered in relevant states or territory. Delivered Australia wide. Pick up from our office in Seven Hills, NSW.

What Compressor Size do I Need?

Match Air Compressor Selection to Your Pneumatic Tool Needs - Right Size Your Compressor

Oversizing an air compressor can result in tool damage, while undersizing the compressor can lead to poor tool performance. Thus, when selecting a compressor to meet your specific jobsite needs, it's important to take into account the total cfm (l/s, m3/hr) requirements for the tools to be powered, as well as their pressure (psi or bar) levels as set by the manufacturer.

When selecting a compressor, first determine the cfm requirements of the tools you plan to use to avoid under- or oversizing the power unit.

Whether it's a small utility model, a mid-sized towable version or a large mountable unit, it's important to correctly size a compressor to the application.

"When you undersize a compressor, it takes more time to finish a task. You may have workers sitting idle waiting for enough air to be generated. When you oversize a compressor, you can also run into efficiency issues - you're simply spending more than you need to from an initial investment standpoint. You will also burn more fuel and you will need larger equipment to move it from jobsite to jobsite."

What are your cfm requirements?
A compressor is usually sized according to the amount of air it can compress to 100 lbs. per square inch (psi) in one minute. This is denoted in cubic feet per minute (cfm)

The first step in determining the size of compressor needed is to establish the cfm requirements of the tools you intend to use. This information is typically labeled on the tool, or can be found in the owner's manual. As a rule of thumb, a paving breaker's weight usually corresponds to the amount of cfm it requires. For example, a 90-lb. breaker requires approximately 90 cfm, a 60-lb. breaker requires approximately 60 cfm, etc.

It's important to do some research before buying. Knowing the cfm requirement of your tools is key and will help you get into the right size of compressor."

Also determine if you will need to run more than one tool simultaneously. Some compressors have several outlets to power multiple tools.

One of the most common sizes of compressors is 185 cfm. With this unit, you could efficiently operate two 90-lb. breakers simultaneously (90 cfm + 90 cfm = 180 cfm) or three 60-lb. breakers (60 cfm + 60 cfm + 60 cfm = 180 cfm).

"However, if a contractor purchased the same 185-cfm compressor to run small rivet busters, which usually require 45 to 50 cfm, or chipping hammers, which usually require 35 to 40 cfm, the compressor would be oversized and the contractor would waste both air and fuel," says Chartters. "Once the valve is open on the compressor, the engine is running, air is being compressed at full capacity and fuel is being consumed regardless of how much air the tool is using. With the instability in today's fuel markets, increasing environmental consciousness and the focus on improving operating costs, most contractors can't afford to waste fuel."

With that in mind, fuel efficiency is one area contractors should consider when trying to match a compressor to the application. "Most contractors require 8 to 10 hours of uninterrupted operation," says Chartters. "Some manufacturers accomplish this by including a larger gas tank. However, for the best air per fuel consumption ratios, look for compressors that pair oversized airends with motors turning at slower speeds - which also reduces noise levels."

Don't exceed pressure levels
Specific pressure levels for tools are usually set by the manufacturer at the factory (typically 90 psi). To avoid damage, you need to make sure you don't exceed these levels.

"Too much psi can damage the tool," states Chuck Westhofen, product marketing manager, Atlas Copco Construction Equipment LLC. "You will replace the tool and tool bit much faster with too much psi. When a customer calls with a tool problem, the first thing we look for is if too much psi is being supplied."

Some tools, such as sand blasting equipment, may have psi levels of 150 psi and above, says Grimmer. "In this application, this higher psi will propel the media faster," he points out. "There is also a trend toward higher pressure tools in general, so contractors can get more work done faster. It's important to be aware of the pressure rating of your tools."

Two power sources in one
Generators are often needed on jobsites to provide electrical power for lighting or non-air or hydraulic-powered equipment, such as pumps, drills or welders. Compressor/generator systems eliminate the need for multiple power sources. Typically, a second V-belt pulley or gear is added to the compressor's engine drive shaft to power the generator.

"Combining these two important utilities into one package has many advantages and has resulted in increased popularity," says Chartters.

Before investing in such a package, evaluate both the compressor and generator for features to ensure optimum performance and value.

"When considering a compressor and generator combination, make sure the engine is powerful enough to operate the compressor and generator at full output," says Chartters. "Significantly reducing the output of either electrical power or compressed air during simultaneous operation is counterproductive. The control system must ensure that the engine delivers constant speed during generator operation to avoid frequency and voltage fluctuation, which could severely damage connected equipment such as pumps or drills."

One of the biggest challenges is to correctly size your new air compressor. Similarly to everything else, new compressors available on the market are more efficient and employ better technology, therefore you have to understand the application and usage to size the machine correctly. Choosing the wrong air compressor for your facility can lead to problems with production and or increased costs due to wasted energy.

What amount of pressure do I need?

Understanding the flow and pressure requirements for your facility is key when choosing an air compressor. Pressure and flow are two very common terms used when discussing compressed air systems.

Pressure can be measured in pounds per square inch (psi), or bar (metric measure of pressure). To think of this in simpler terms, pressure refers to the amount of force needed to perform certain amount of work at any given point in time. A simple example of pressure and how it works, is to imagine moving a wooden block across a table. In the illustration below, it shows that using 75 psi of compressed air is not enough force to move the block, but 100 psi of pressure has the ability to move the wooden block the desired distance.

The air compressor has to provide enough pressure to perform a given task (in this case it was to move a wooden block). Per illustration below, if 100 psi is required to move the block, anything less than that will not accomplish the task. It is important to understand what pressure is needed in order to size the compressor properly, otherwise you will be faced with problems, similar to illustration below where lower pressure was not able to move the wooden block, or perform the job.

What is the right air flow for my compressor?

Flow, also referred to as free air delivery (FAD) can be measured in cubic feet per minute (cfm), liters per second (l/s) or cubic meters per hour (m3/h) depending on your geographical location. In simpler terms, flow is the ability of the compressor to continue performing a task within an acceptable time frame. The amount of flow required is determined by the length of time needed to complete a given task. Let us consider the wooden block example to explain this further. To move a wooden block a certain distance every hour will require less flow and can be achieved with a smaller compressor and a storage tank. The compressor will cycle on and off and refill the storage tank for the next time the wooden block is required to move. However, if the wooden block has to be moved constantly within a given time frame, a larger flow of air (or CFM) with continuous flow will be needed, thus requiring a larger compressor. If the flow is insufficient, the process will require frequent breaks while the compressor builds up pressure in the reserve tank, therefore indicating that the compressor might be undersized.

Ultimately, when you are looking to supply enough compressed air for a given application, it is important to consider the amount of compressed air flow (CFM) needed at a specific pressure (PSI) required for the process to work properly.

One of the ways to find out the total flow needed is to contact the manufacturer of the equipment that uses compressed air and request data sheets with desired information. However, the best way to measure accurate flow, is to perform a “compressed air audit”, which can be done by a compressed air sales professional. It is important to keep in mind that rotary screw air compressors tend to put out more flow per kW or HP than piston compressors.

To summarize, pressure (PSI) is determined by the job you are performing, while flow (CFM) will require the understanding of how frequently the job has to be done, or how many jobs you are performing at the same time. It is important to understand that under sizing a compressor will result in pressure drops and inability to complete a task, while oversizing the unit can lead to future mechanical problems and potential failure of the compressor. If you are unsure on how to size your new compressor for existing or new application, always contact a compressed air sales professional for an audit.

Are you are hire company or compressor sales company? Contact us now for trade pricing .