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Click below to see contributions from other visitors to this page...

How large does a port need to be to admit 12 cubic inches of air @ 14 bar at the speed of sound? 
My tool uses ante-chambers and limited "open" ports.

Assuming an inflow port is open for one-4000 sec, how large must the port be? How does one compute ...

how does the air inside the air compressor travel? 
For example, starting from the atmosphere, then to the different parts of the compressor, until air is supplied...

Dianne




Bill answers....

Air Compressor Wattage Requirement 
How large a generator (portable) do I need to adequately power a 230V/20Amp Air Compressor, Single Stage, V Head 3hp?

wolf air apache 50 
I have lost the manual 4 this compressor is it poss 2 get another 1? thanks.

Relief valve on discharge line 
What is the purpose of the relief valve on the discharge cross over line on a 2 cylinder compressor? Thanks

Plumbing a compressed air line question 
Is there any benefit when plumbing in a copper line for the compressor-to run it on the ceiling of the shop or would it be better to drop down (6"-12") from ...

A question about air velocity and compressed air flow. 
What is the maximum permissible velocity or air flow through different sizes of piping?

Is there any tables or ways to calculate the maximum permissible ...

Sears compressor 12 yr old does not inflate and .... 
My Sears compressor cutting-off pressure is not working.

Also when trying to inflate the tires of my SUV it isn't doing anything even though good air ...

Quick Coupler / Connector Question 
Why are there so many different size quick connectors or couplers?

Does it matter which size I choose for various shop tools (eg. orbital sanders,...

Compressor motor doesn't restart when pressure drops 
The unit is a Campbell Hausfeld air compressor with 220V 5hp motor and two cylinder compressor.

When I acquired this 25 year old unit, the previous ...

Where is it regulated that the PSI in the air lines has to be visible?  
In other words, is it a requirement that a tag or warning sign is required that shows the line pressure?

I have looked in OSHA and found only references ...

Parts for Task Force Air Compressor 
My husband has a Task Force air compressor.

The air compressor will not build up air pressure. My brother told him that it needs a piston.

The Model ...

What's the difference between CFM and SCFM? 
My air gun uses 12-14 CFM.

My compressor puts out 8.8 SCFM @ 90 psi.

What's the difference?

Air Filter for Inlet Air 
Can anyone supply me with information on how to remove sulphur oxides (SO2 ) from our
compressor inlet air supply in polluted environment?

Is there ...

Converting SCFH to SCFM 
A machine I am working on calls for 350 SCFH (standard cubic feet per hour).

I am not sure if I just divide the 350 SCFH by 60 to get SCFM (standard ...

How to calculate SCFM for my compressor. 
I have a 3hp, 20 gallon compressor.

What's the SCFM?

Compressed Air Regulator Problem 
We are replacing our air regulator every 30 to 60 days.

It starts out running properly at 20 to 25 psi, but we have to keep constantly increasing the ...

Compressor ability 
I have a Huskey 2.0 SCFM @90 PSI with max PSI of 135 and 1.75 gal air reserve.

How capable is it to drive a 2 inch brad nailer???

About lost pressure 
Hello. My compressor runs all the time now and doesn't achieve full pressure.

This started occurring after I drained the tank and replaced the oil....

Pressure Regulators with Diaphragms 
How do I know if a diaphragm type pressure regulator is failing?

Is some bleed off normal and if it increases then the diaphragm is bad?

Refering ...

How do I compute the scfm of my air compressor? 
I have a reciprocating air compressor, max discharge is 125 psig, 100 hp, 708 rpm, 12-7x7.

What is my scfm?

Increasing compressor CFM 
Hi,
I was wondering if it is possible to increase the CFM on a compressor or if what you have is what you get?

I have a 25 gallon, 5.4 CFM. I would ...

Air Tools and SCFM ratings 
I have Air Compressor from Porter Cable model CFNBNS rated at 2.6 SCFM @90PSI / 3.5SCFM @40PSI.

I would like to buy and use Task Force Spray Gun model ...

What size of air compressor do I need? 
I have a air grinder that operates at 90 psi. What size of air compressor do I need to run it for a while?

I have alot of different air tools and even ...

Types of air compressors 
I know nothing about air compressors.

What's the difference in a 1 gallon compressor and a 5 gallon compressor?

Does that mean that it can just ...

SCFM= Too low to run standard air tools? 
My wife just bought me a craftsman vertical air compressor.

Being new and unfamiliar to air compressors we thought that the bigger tank allowed for ...

Restarting a Compressor 
I just recently received an old used air compressor from a friend.

It continues to cut off and trip the motor after a minute or so of running. It ...

Compressor horsepower 
I am looking at purchasing a new air compressor. I have a question as to how the horsepower is rated. I have found similar compressors with equal CFM ...

Compressor for Hardwood Flooring Stapler 
I have purchased and will soon be installing maple hardwood flooring on sleepers in my basement. I already did it upstairs except on plywood. A borrowed ...

an air brush compressor 
what is the difference between internal bleed and self bleeding compressors?

Attaching a tank to a small diaphragm air brush compressor 
I currently own a small 1/5 hp diaphragm type, tank-less air brush compressor. It works ok, but I really want the smooth supply of a tank. I just ordered ...

What is 'Cracking pressure'? 
Looking at check valves, I see specification such as this:

Cracking pressure 4 PSI

What is cracking pressure and in this example what does a ...

Increasing CFM 
Can you run two identical 5.3 CFM @ 90 PSI units to generate 10.6 CFM at the same PSI?

speedaire compressor cfm unknown 
Is there a way I can roughly calculate the output. It is a reciprocating type V piston arrangement twin cylinder. I can't find the specs for it and ...

winterizing air compressoers 
Do you have to keep the compresser indoors during the winter months?

air compressor for my bicycle store 
I need a quiet air compressor for my bicycle store the one we now have is too noisy or shall I make a plywood box with foam inside to baffle the sound ...

Location of dessicant dryer 
I have a system that already has a refrigerant dryer (expected output 39 deg F Dewpoint Temp).

There is a new piece of equipment that requires super ...

Air compressor cannot restart when reaching low pressure setpoint 
My Compressor (belt driven iron pump) starts OK when empty and runs until it reaches the set PSI value.

When I use the air and the pressure reaches ...

Buying a air compressor 
My son wants a air compressor for Christmas. I know nothing about them. He will be using the air compressor when he is working on his car. I need hints ...

Can you use an air compressor to remove paint or is there a sandblaster attachment? 
Just got a new air compressor, one home project is to remove paint from a metal stair railing.

Is there a method or an attachment for the air compressor ...

Sears 1972, 5 hp 2 stage 120 gal horz tank compressor 
I just purchased a 1972 Sears 5 hp 2 stage 120 gal horz tank compressor. Sears does not offer an owners manual any more. Who was the original manufacture ...

PROBLEM with a compressor 
I have a 1.7 hp 25 gal compressor, recently while using the compressor to blow some vacume filters clean, the safety valve began bleeding the tank when ...

Oil vs Oil free air compressors 
What are the major differences between oil and oil free air compressors?

Piping Distance 
I have two buildings that are about 300 Feet apart. I am trying to figure out what size pipe, and compressor would be needed to span this distance. Or ...

Compressor for Airbrushing 
I want to airbrush designs on cakes.

I got an airbrush kit as a gift but I do not have a compressor.

I have never used this type of tool before....

Air consumption Calculation of actuators?  Not rated yet
Dear sir,

I need to calculate air consumption of all of my actuators.

The data I got is Air consumption in NL/travel is 0.12 for one of my actuator....

SCFM/PSI Relationship  Not rated yet
I'm shopping for an air compressor and see 40 psi and 90 psi as a common point of reference for SCFM.

Why is SCFM greater at 40 PSI?

Shouldn'...

Bleeding (draining) the air.  Not rated yet
My dad yells at me for using the air compressor because some times I forget to drain the air.

He says ..." The second you are done filling the tire ...

What difference does the free air at a certain CFM make?  Not rated yet
Is it better to have more free air at a certain CFM or to have maximum pressure?



Bill Answers....

Hello there. Thanks for the question, though ...

Compressor oil change  Not rated yet
I have 20+ yrs old sears 2hp mo.# 106.153991.

Would like to know how much oil it takes?



Bill answers...

Howdy:

Difficult to say without ...

Using a blower to achieve 15 psi  Not rated yet
How many CFM blower would l need to achieve 15 psi at the discharge end of 50 feet of half inch black pipe?



Bill answers...

Hi Larry...

Fan ...

Rotary Vane Sizing Calculations  Not rated yet
I work for a small engineering company and I am designing a sliding vane rotary compressor for a supercharger application on a small horsepower engine,...

Water in the oil  Not rated yet
This is a 2 stage compressor. It has a belt driven crankshaft with 2 pistons.

There are two of these unit mounted to the receiver tank.

The ...

Passive pressure limit switch?  Not rated yet
IS there a non-electrical device that will shut off air flow if the air pressure is less than a pre-set value? I can do this with sensors and solenoids,...

Does a compressor tank need more than one port?  Not rated yet
I have a compressor with a 20 gallon tank that has developed a pin hole leak and needs to be replaced. I have a replacement tank available which has a ...

Wiring a compressor pressure switch  Not rated yet
I am trying to figure out how to wire the pressure switch on my electric stage 1 air compressor.

The guy I got it from had the cord off, now there is ...

I need an unbiased opinion about compressor repairs.  Not rated yet
I had a technician come out to check out our unit that had stopped cooling. We have had problems in the past and had to replace the fan motor, so when ...

Parts for a Speedaire Compressor?  Not rated yet
I have an old speedaire air compressor model # 5Z017B 5 horse, 2 stage, 1 phase...elec.

Do you known where can I get parts?



Bill answers....

adjust the depth of a staple by using a combo nailer stapler gun  Not rated yet
I have a Campbell Hausfeld Compressor, 3 year old model, and a combo nailer and stapler.

I am unable to adjust the depth of the staples. At present,...

Plumbing compressed air outside.  Not rated yet
I need to pipe compressed air from one building, outside and into another building.

Temperatures can get down to minus 35 below zero in the winter ...

Ride control of bus & RV pneumatic air bag suspension.   Not rated yet
I have been intrigued by the claims of this system. See:

http://hendersonslineup.com/uncategorized/supersteer-motion-control-unit/

To me, it looks ...

What are the rules regarding portable air compressors ?  Not rated yet
We have two old air compressors.

One is a 1986 sullair 100 cfm about 70 Hp + and the other is an ingersol rand 1980 100 cfm 67 HP unit.

They are ...

How to calculate required air pressure in a factory.  Not rated yet
Air compressor air calculation for a factory is required what type of data?

Is it related with CFM or air storage in compressor?

How to calculate ...

sizing a compressor  Not rated yet
Hi!

I have to size a compressor with a suction pressure of 3.4 bars and a discharge pressure of 7.18 bars.

How do I go about doing this? Your information ...

Force on a compressed air tank  Not rated yet
We've got an aluminum air tank, 9.75" diameter x 28.75" long.

The tank material is .125 5052 H32.

What is the force on the tank if the pressure ...

I keep getting 4cfm @ 90 PSI or 100 PSI or what?   Not rated yet
I keep getting 4cfm @ 90 or 100 or? What is the standard? does it necessarily apply? is there a minimum hp? does it apply to all compressor types?

I ...

What is the difference between spring return and differential return air valve?  Not rated yet
What is the difference between spring return and differential return and where I can use each one?

I use 5/2 valve with differential return to control ...

Old speedair unit -safe to run??  Not rated yet
I was given an old Speedaire air compressor, which I'm told hasn't been run in 15 years.

I plugged it in and it immediately started up, but I only ...

Compressed Air Recovery  Not rated yet
We are using High pressure air 10.5 kg/cm2.

I would like to know about recovery systems for exhaust compressed air.



Bill answers...

Hello ...

What happen when water goes into the air compressor ?  Not rated yet
I was cleaning a heat exchanger and looks that I damage it and without knowing put it back in the compressor.

When I started it every seemed to be OK,...

What CFM is an Ingersoll Rand HP355WP?  Not rated yet
What CFM is an Ingersoll Rand HP355WP?



Bill answers...

Hi Martin...nice to hear from the UK.

First off, you can normally count on generating ...

Check Valve (universal?)  Not rated yet
where do I get a check valve for a
Porter Cable oil-less compressor
2.6 cfm 90 psig 6 gallon flat bubble.



Bill answers...

Hi William....

Compressor Issue  Not rated yet
My compressor pumps to cut off at 120 PSI then a little switch on the side of the regulator kicks in and drains air off till it reaches cut in pressure ...

Speedaire Compressor   Not rated yet
Hi-

I am working on feasibility study project and would like to know the age of existing Speedaire compressor and approximately the average life span ...

Selecting an oil free or oil lubricated compressor  Not rated yet
For home purposes (choc gun for car's tires + spray gun for painting), what should be considered in choosing between a oil compressor and a non-oil compressor?...

Why does my compressor's copper line get hot?  Not rated yet
My air compressor has a copper line on it and after it had been running for a long period of time the copper line was very hot - melted my rubber air hose....

air compressor faulty?  Not rated yet
I have a Yanmar diesel with an Ingersoll rand tank and compressor mounted to a trailer for portability.

The team works fine together until the air ...

CFM and PSI  Not rated yet
Hi-
I have a piece of equipment that requires 25CFM @ 110PSI.

The specs on one 5 HP rotary compressor that I am looking at lists the CFM at 16.5 with ...

how to change oil in sears 25 gallon air compressor  Not rated yet
Sears 25 gallon air compressor Model : 919.721820 purchased it used and just for the safe side would like to replace the oil, or if I can get access to ...

Compressor Temperature  Not rated yet
My two stage IR compressor seems very hot after running for extended periods. I know that compressing the air makes it hotter. I just don't know how hot,...

About plumbing compressed air  Not rated yet
My company is starting a granite countertop fabrication operation. Adding up all of the requirements of the machinery and tools, I will need a peak of ...

Filtering (of water) in a portable air compressor  Not rated yet
I have a 17 gallon portable air compressor.

What is the effectiveness of installing an air filter directly upstream of the regulator for the purpose ...

HEPA FILTERS.  Not rated yet
I need a HEPA filter (99.9) for a 125 PSI, 50 CFM compressed air system.

Can I get some basic details and guidelines?

Gary



Bill answers....

Plumbing a workshop & wiring a compressor  Not rated yet
Two questions:

I'm going to wire my garage for a CH Farmhand (7HP/60gal/135max/10.3@90).

Will 10-3 be enough,(which I have a lot of) or should I ...

Air fitting on a tank  Not rated yet
I am trying to mount an air fitting to a tank.

I would like to know how to seal it properly so that air does not leak up the threads of the fitting....

Calculating usage  Not rated yet
I currently have a Kellogg 45tv with a 10 hp motor, the tank is a b452bo. On @90 psi off @ 115.

Unit runs 4 min on and 3 min off during working hours....

Is there a difference between twin cylinder and 2-stage compressors?  Not rated yet
I'm shopping for a compressor for my shop.

I have seen compressors that say they are twin cylinder...and some that say they are 2-stage. I saw one ...

Compressed air nailer dilemma  Not rated yet
OK,

I have a Dewalt D55168 compressor
It has an SCFM rating @ 90 PSI of 5.4

The nailers that I am looking at call for
8 - 10, or 8- 12 CFM @ 60 ...

Hand operated compressors?  Not rated yet
Theoretical Question.

Is it possible to to run a portable air compressor without electricity by manually turning the wheel by hand that is normally ...

Unusual volume specification, on US Govt compressor.  Not rated yet
An unusual volume specification, on US Govt compressor.

I see a compressor performance tag showing a specification I am not at all familiar with.

I ...

Reed valve for BelAir compressor  Not rated yet
A reed valve broke on my BelAir compressor. How will that affect the compressor and where do I go to find a replacement?

BelAir Mod. 316VN
4 flat ...

Pneumatic Circuit  Not rated yet
Respected Sir,

I am very much impressed to note that you have explained different types of valves very efficiently.I am very much thankful to you for ...

Required Energy for compressing atmosphere.  Not rated yet
Given a consistent temperature (298K) and volume (1.1L), how much energy is required to raise the pressure to 306 atmospheres from 1 atmosphere by multiplying ...

Auto Drains  Not rated yet
Your document refers to auto drains as applying to industrial compressed air systems.

A question on a general petrol station site that supplies air ...

Loop Air systems  Not rated yet
In a larger factory, we have a row of machines and only one supply line 2in in diameter.

This runs from the receiver beside the compressor to the end ...

Air Compression Ratio  Not rated yet
Hi, I am currently using an electric pump to supply water from a 20 liter backpack at 60-80psi.

However to remove the weight of a battery and pump,...

Running two or more air tools at the same time, tank volume, 1 or 2 stage  Not rated yet
Hi,

We are considering purchasing an air compressor for our home shop.

When running two tools at the same time, say a die grinder with 5 CFM at ...

Pressure Regulator Gauges  Not rated yet
I replaced my regulator and it has two openings for two gauges. My old regulator was just like this.

However, one gauge showed me the pressure in the ...

Task Force 10 gallon air tank  Not rated yet
I need a part for this tank.

It's the brass piece that attaches and connects the PSI gauge and drain valve. I damaged the threaded piece that connects ...

Reciprocating compressor calculations  Not rated yet
Greetings,

I work at a power plant that uses a reciprocating compressor to evacuate gases from a system. It is set up so that the compressor inlet ...

What is the smallest compressor that can handle an impact wrench?  Not rated yet
Hello,

I need to change tires on my cars twice a year.

I have a 4 gallons 3.7 SCFM small compressor.

The specs for impact wrench seems to be ...

Can you tell the CFM from just the PSI?  Not rated yet
Hi,

Sorry this is probably a really silly question,

But is there anyway to calculate the CFM from the PSI rating on a compressor?

The reason ...

Can I use a compressor from Home Depot or Lowes in a dental office?  Not rated yet
My compressor in my dental office recently went down.

It consisted of (2) 1HP heads and a 10 gallon tank. I had a major air leak which caused them ...

Autos on compressed air?  Not rated yet
How's our tech coming along for running cars on compressed air ??

We soon should be able to build solar panels into hoods,roofs etc.

These new Ion ...