Proportioning the Compressed Air Dryer
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How to pick the right rotary screw compressor
When an industrial application calls for a steady supply of quality air, more and more users are turning to rotary screw compressors. Their efficiency, reliability and versatility make them a great choice in these cases. But there are countless applications and many different types of rotary screw air compressors. So which one is the right one for you?
First, letโs look at their benefits: In addition to the efficiency, reliability and versatility, rotary screw air compressors have many
other advantages.
Their noise output is low and their physical footprint small. That means you can install them in more places.
Unlike piston compressors, they donโt need cool-down periods. This allows them to operate continuously around the clock - and they do not require a lot of maintenance.
In addition, oil-lubricated rotary screw compressors feature a low oil carry-over of as little as 3 ppm.
Finally, over their expected service life of 10 years or more, you donโt have to worry about a loss of capacity.
Fixed-speed and variable speed rotary screw compressors
The
first major distinction is the one between fixed-speed and variable speed rotary screw air compressors. As the name indicates, the former
run at a single speed. That makes them a great choice for applications with a steady air demand (and the more steady that demand, the more
efficient they are).
Variable speed drive (VSD) compressors, on the other hand, adjust their motor speed to the amount of air that is needed. As a result, they can take their efficiency to another level if the compressed air demand fluctuates.
If that applies to you, you can learn more here about our VSD series.
This article primarily deals with the different types of fixed-speed rotary screw compressors. That means if your air demand is constant, you should read on for important information.
Oil-free and oil-injected rotary screw compressors
Having narrowed your selection to fixed-speed compressors, the next step is to choose between oil-free or oil-injected models.
The difference is that the latter introduces a new contaminant into the compression process. Therefore, you would pick an oil-free compressor if the presence of oil vapors matters โ for example if your industry is subject to air purity standards. This includes the pharmaceutical industry, the food and beverage sector and semiconductor manufacturing.
Here, oil-free technology is a better alternative than using an oil-injected model and then filtering out the contaminant.
If air quality is less important, for example if you need the compressor to power pneumatic tools, then an oil-injected model will generally suffice.
Two drive types, lots of benefits
Atlas Copco offers its fixed-speed rotary screw compressors with two types of drives. Depending on your application, each of them has different advantages.
-Belt drive: Fixed-speed rotary screw compressors with belt drives are very robust. They are the least expensive and are easy to install, operate and maintain. For all of these reasons, they are a popular choice for smaller operations.
-Gear drive: A gear drive makes a compressor quieter. That means you can install it in more places without violating noise standards. Their initial investment cost is a little higher. However, because they are more efficient and maintenance free, rotary screw compressors with gears are less expensive to operate. This will allow you to quickly recoup that higher cost.
Get in touch with one of our experts
Getting your compressor size right
No matter which type of compressor you choose, it is very important that you get its size right. If the unit is too small, it may not get the job done. If it is too large, you will waste a lot of valuable energy.
However, rotary screw compressors are a good deal with lots of benefits at any size. Compared to piston air compressors, which are traditionally used by operations with a limited compressed air demand, they offer many advantages. First and foremost, they are more efficient, which reduces your costs and environmental footprint.
Because they can run around the clock, they can handle an increased demand better. Finally, fixed-speed rotary screw compressor lower the oil content in your compressed air system.
And the larger your compressor gets, the more you can save down the road.
A complete offer
Ash Air offers a complete range of oil-injected fixed-speed compressors for different types of users with different priorities:
Below 50HP - Screw Air Compressors
Chicago Pneumatic rotary screw air compressors are built on the very robust platform and feature state of the art controller and high-efficiency screw element.
The Ash Air range of oil lubricated screw air compressors are excellent all-in-one solutions for small and medium workshops, with energy cost savings of 30% - 35%. The most popular air compressors 10HP, 15HP, and 20HP are available as a full feature with integrated air dryer and receiver. More than 100 rotary air compressors available for sale from stock in Auckland and Christchurch.
Direct driven air compressors with variable speed drives offer high energy efficiency, a smooth start and prolonged life of the component parts, reduced system pressure and energy consumption.
Sub Categories
Above 50HP - Screw Air Compressors
For power above 45 kW we offer ALUP air compressors, designed and manufactured in Europe. We installed Alup rotary screw air compressors at dozens of sites in New Zealand for food processing, at timber plants and other industrial sites.
These high-efficiency rotary screw air compressors feature variable speed drives, remote monitoring and heat recovery options. ALUP air compressor is covered by an optional 5 years warranty.
The three most popular air compressors 45 kW, 55kW and 75 kW are available for sale from stock in Auckland. Chat to our experts, we will help you to answer questions about what can you use the compressor for, what compressor is the best and learn all about air compressor efficiency.
Sub Categories
Oil Free - Screw Air Compressors
The team at AshAir specialises in oil-free or oil-less scroll compressors with zero risk of oil contamination, and are ideal for critical applications including medical, pharmaceutical, dental, R&D, food & beverage, wine and brewery. Our 100% oil-less scroll compressors are designed with fewer moving parts, which means less wear and tear, less noise, higher efficiency and reliability, and a longer machine life .
These scroll compressors use cutting-edge scroll technology where the spirals never contact each other, and no lubrication is needed, making them completely oil-free. Our SPR 20 Multi oil-less scroll compressor operates with variable air delivery, controlled by an intelligent controller for air delivery supplied according to the fluctuation of air demand. This means a higher energy efficiency and more stable system pressure.
Sub Categories
Ash Air has been around in New Zealand since 1979, and weโve grown into a nationwide company with international support and a
reputation for quality and reliability.We look after all things compressed air for your business!
Ash Air's range of Chicago Pneumatic, ALUP, Pneumatech, and Atlas Copco products are used extensively around the world in
industries ranging from oil and gas to food, automotive and farming, and we bring you these world-class compressors here in the land of
the long white cloud.Our technicians are compressed air equipment experts and are dedicated to addressing customer needs. Supported with
nationwide coverage, Ash Air offers one of the widest selections of compressed air, vacuum pump, and industrial gas equipment and parts
available today in New Zealand.
With Ash Air, you can count on reliability and high performance for even the most demanding applications. We focus our efforts
on the following:
Talk to the team today:
Maintenance budget: 8 factors to consider
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lifespan. Even though maintenance costs are only about 5 to 10% of a machine's annual operating costs, failure to budget for
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The air dyer is one of the most ignored cooler in the system. A dirty condenser will cause water in the lines, or worse it will cause
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also save you money as early as month one adding that savings to your bottom line.
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product costs involved with compressed air, as well as minimising the energy cost of compressors and cost allocation. When looking at these
factors, we need to realise what causes dropped efficiency of your compressor, leading to increased costs of compressed air.
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Dropped tools and other falling objects are a major hazard โ and one that isnโt always fully addressed.ย
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Providing a safe working environment for operators is essential, especially when using pneumatic tools and compressed air. If there is a
failure in the air network and the hose is not adequately clamped, the resulting whiplash could be devastating. Failure to follow best
practice can result in injuries, associated production downtime and decreased productivity.
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Why do I need a dryer for my compressor?
A common questions asked is why do I need an air dryer for my compressor? Typically, air compressors produce water, and although the
water can be drained, there can still be aerosol and vapour droplets that are present. This is because water cannoet be compressed. Water
can damage your compressor by corroding the valves, pipes and machinery controls, which will cost you time and money to resolve. In
the long run, the cost of a new compressor is a small price to pay compared to the loss of production that could potentially arise due
to water damage in your compressor.
What are some preventable causes of air compressor failure?
Air compressors can fail for an assortment of different reasons: Normal wear and tear, lifespan and age of the unit, poor maintenance, power surge, install issues are just a few the come to mind. Check out this blog to find out our top 7 tips to ensure your compressor is looked
after!
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Simple Ways to Reduce Your Compressed Air Costs?
Air compressors use considerable volumes of energy during a typical work cycle. When you add up all the expenses of operating a facility,
any savings can help you boost your bottom line.
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What Should You Know When Buying a Compressor for the First Time?
If you have never bought a rotary screw air compressor before; do the following. Add up the air consumption of all the equipment at your
shop. That will be the amount of air your desired compressor should provide.
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How to Know When Your Industrial Air Compressor Needs Servicing
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prudent to call in repairs are skills that could save you a lot of time, effort, and money in the long term.
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One-stage vs Multi-stage Compressor
Find out the difference between a one-stage compressor and a multi-stage compressor.
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How do I winterise my air compressor?
That cold, rainy, and in some places icey New Zealand winter is upon us, and with the following air compressor tips, your air system will be
prepared with the preferred temperatures, despite the weather outside. Regardless of whether or not it actually snows or freezes up where
you live, most winterisation service recommendations are also basic, solid maintenance procedures that will help extend the life and
operational efficiencies of air compressors regardless of whether you live in Queenstown or Northland.
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The right desiccant dryer with quality desiccant will improve dryer performance and lifetime and will reduce energy and service costs.
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If you're wondering what an air compressor actually is, you've come to the right place. Simply, air compressors convert power in to air that
is pressurised which is then used to power air tools such as spray guns. Air compressors are used in a wide range of applications, so
naturally if you want one that will be designed for spray painting your vehicle, you want a compressor specifically made for spray guns!
This way your compressor will be able to provide the right amount of power to perform the job.
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How to Optimise Compressor Operating Costs
Compressed air plays a fundamental role in industrial activities. Depending on the type of application, the energy cost of producing
compressed air can be very high. Below are some tips to save on you compressor bill.
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can be a crucial part of getting the job done efficiently. However, like an investment, air compressors require upkeep and maintenance, and
eventually will need to be upgraded. But how do you know when itโs time to upgrade your air compressor? Here are some things you need to
consider.
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Choosing the right assist gas in laser cutting: nitrogen or oxygen
When it comes to laser cutting and other industrial processes, the choice of assist gas is crucial in achieving optimal results. Nitrogen
and oxygen are commonly utilized as assist gases, each with its own unique properties and applications. Understanding the characteristics of
both gases, will help you to make an informed decision to ensure precision, efficiency, and cost-effectiveness in your operations.
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Controlling your nitrogen purity made easy
On-site nitrogen generators have many benefits over bottled gas. One is that they allow you to select your nitrogen purity. Here is how.
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us know!
Who we are and how Ash Air can help your business!
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