Airmaster Compressors

[James Talbot]

Anair compressor is a machine that takes ambient air from the surroundings and discharges it at a higher pressure. It is an application of a gas compressor and a pneumatic device that converts mechanical power (from an electric motor, diesel or gasoline engine, etc.) into potential energy stored in compressed air, which has many uses. A common application is to compress air into a storage tank, for immediate or later use. When the delivery pressure reaches its set upper limit, the compressor is shut off, or the excess air is released through an overpressure valve. The compressed air is stored in the tank until it is needed.[1] The pressure energy provided by the compressed air can be used for a variety of applications such as pneumatic tools as it is released. When tank pressure reaches its lower limit, the air compressor turns on again and re-pressurizes the tank.A compressor is different from a pump because it works on a gas, while pumps work on a liquid.

Positive-displacement compressors work by forcing air through a chamber whose volume is decreased to compress the air. Once the pressure is greater than the pressure outside the discharge valve, a port or valve opens and air is discharged into the outlet system from the compression chamber.[5] Common types of positive displacement compressors are

The capacities for both single-stage and two-stage compressors are generally specified in Standard Cubic feet per Minute (SCFM) or litres per minute and pounds per square Inch (PSI) or bar. To a lesser extent, some compressors are rated in actual cubic feet per minute (ACFM).[clarification needed][citation needed] Still others are rated in cubic feet per minute (CFM).[clarification needed][citation needed] Using CFM alone to rate a compressor is ambiguous because it represents a flow rate without a pressure reference. i.e. 20 CFM at 60 PSI.

Single stage compressors usually fall into the fractional through 5 horsepower range.[citation needed] Two-stage compressors normally fall into the 5 through 30 horsepower range.[citation needed][clarification needed]

Roto-dynamic air compressors include centrifugal compressors where Rotating vanes impart kinetic energy to a gas and stationary passages convert velocity into a rise in pressure, and axial compressors, where rotor blades impart the kinetic energy and stator blades convert it to a rise in pressure.

Due to adiabatic heating, air compressors require some method of disposing of waste heat. Generally this is some form of air- or water-cooling, although some (particularly rotary type) compressors may be cooled by oil (that is then in turn air- or water-cooled).[6] The atmospheric changes are also considered during cooling of compressors.[clarification needed] The type of cooling is determined by considering the factors such as inlet temperature, ambient temperature, power of the compressor and area of application. There is no single type of compressor that could be used for any application.

Air compressors have many uses, such as supplying clean high-pressure air to fill gas cylinders, supplying clean moderate-pressure air to a submerged surface supplied air diver, supplying moderate-pressure clean air for driving some office and school building pneumatic HVAC control system valves, supplying a large amount of moderate-pressure air to power pneumatic tools, such as jackhammers, filling high pressure air tanks (HPA, air tank), for filling tires, and to produce large volumes of moderate-pressure air for large-scale industrial processes (such as oxidation for petroleum coking or cement plant bag house purge systems).[7]

Most air compressors either are reciprocating piston type, rotary vane or rotary screw. Centrifugal compressors are common in very large applications, while rotary screw, scroll,[8] and reciprocating air compressors are favored for small and medium-sized applications.

Air compressors are designed to utilize a variety of power sources. While direct drive gasoline or diesel-engines and electric motors are among the most popular, air compressors that utilize vehicle engines, power-take-off, or hydraulic ports are also commonly used in mobile applications.[9]

The power of a compressor is measured in HP (horsepower) and CFM (cubic feet per minute of intake air).[10]The volume of the pressure vessel and the stored pressure indicate the volume of compressed air (in reserve) available.

Gasoline and diesel-powered compressors are widely used in remote areas with problematic access to electricity. They are noisy and require ventilation for exhaust gases, particularly if the compressed air is to be used for a breathing air supply. Electric-powered compressors are widely used in production, workshops and garages with permanent access to electricity. Common workshop/garage compressors are 110-120 Volt or 230-240 Volt. Compressor tank shapes are: "pancake", "twin tank", "horizontal", and "vertical". Depending on a size and purpose compressors can be stationary or portable.

To ensure all compressor types run efficiently with no leaks, it is necessary to perform routine maintenance. The cost of maintenance only accounts for 8% of the life cycle cost of owning an air compressor. [11]

According to CAGI air compressor performance verification data sheets, the higher the isentropic efficiency is, the better the energy saving is. The better air compressor isentropic efficiency has reached 95%.[12]

You'll want a compressor that puts out at least 10 cfm@90 psi. I seem to recall that the Kinyon plans call for a 11cfm air source. !2-13 would be better. My compressor only puts out 6.4 cfm@90 psi and it has to run 100% of the time when I'm using my hammer. I'm using a 2"x10" cylinder. A smaller cylinder will need less, and a larger cylinder will require more.

The old rule when buying compressors is take your current requirement and double it then buy accordingly. Now I know from experience this "old rule" can create a serious expense quickly.

So where does that leave us? Well you have to look at your budget first. Define what you can afford in a compressor. Then figure out what is the best thing in that price range. Air compressors are all about you get what you pay for.

Remember cast iron is the best for a pump. If your going to be running an air hammer look for the words "continuous duty" otherwise you will destroy the pump in short order.

I have a 7.5HP Quincy Air Master light industrial air compressor with an 80 gallon reciever. It produces 21.3 CFM @175PSI and to be honest I can bury it with my hammer. If you are planning on doing a lot of drawing, you will want a lot of compressor. If you mainly use hand tooling and use it like a striker or a treadle hammer you will likely be happy with just the bare minimium for your compressor.

Questions to ask yourself to figure out just how big a compressor you really need???

Do you work multiple pieces at the same time?

Do you have a gas forge, and do you stack it high and deep?

Do you want to do a lot of drawing, table legs, tool handles, damascus???

Do you mainly like to work one piece at a time?

Do you use a coal forge with a hand crank blower?

Do you mainly want to use the tremedous control of an air hammer?

Do like using hand tooling?

There are lots of people who get by with smaller compressors and are happy with their hammers and the amount of money they have invested. But to be honest even an inefficient air hammer is better than trying to beat your way through by hand, if your not smithing all the time. An air hammer always works better with extra free air, and lot of capacity. ALL hammers work better with a proper foundation, that is isolated from the main floor of the building. Do big wooden bases work, yes most of the time. Is it the best type of base, no. Would I use one, maybe;-) There is a big difference between ideal, and what we need to settle for in a practical world. Ideally you should have a anvil to ram ratio of between 20-40 to 1, but there are a lot of hammers built that have an anvil to ram ratio of 6 to 1, they bounce abit more than they should but they do work, and if built strudily enough they will last and do an ok job...

Bottomline... Strech and do the best you can, and don't let the lack of being able to do what is "IDEAL" keep you from doing what you can;-)

Energy efficiency was the key focus of the development of this recent compressor range. The high-output in-house made airend with slow rotational speed reduces significantly the energy costs. In addition to this, the innovative design of the fail safe shaft seal, integrated oil filter and oil regulation valve, ensures external hoses are reduced to a minimum to guarantee the highest levels of quality and reliability are achieved.

Premium quality semi integrated airends designed and manufactured in house together with all the extra features included as standard assure the high reliability and the premium performance of our new oil lubricated screw compressors.

As always our oil lubricated compressors are designed for high efficiency but also for easy and quick service. The unique semi integrated design of the airend and the optimization of service parts, like separator and filters, assure easy and quick service of the complete package.

The modern design, made of quality components, provides the reliability operators expect from their compressed air source. The high-out airend and the energy efficient IE3 electric motor are the key constituents that guarantee highest performance levels. Being equipped with high performance separator filtration ensures highest quality air

(The upgraded frame 2+ will feature our new Delcos Pro SE compressor controller has the capability to have programmable inputs and outputs, control additional equipment as well as providing clear readable text from a Graphic Display with modern user interface.

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