Tube Length from Valve to Cylinder

High CFM + Small tube = High Pressure Drop

Low CFM + Lage tube = Low Pressure Drop

The main thing about long air lines between the valve and the cylinder in PNEUMATIC CIRCUITS is the fact that all the air to fill these lines each cycle is WASTED since it must fll the lines to working pressure but does not perform any work. The lines must be FILLED each cycle BUT THEY MUST BE EXHAUTED ALSO.

I always mount the Air Valves on the actuator and run the AIR LINES lines to them. That way minimal air is wasted each cycle and faster cycles are possible.

I was asked to check out a large production lines Air Circuit that was specified to need a 2" air supply. However, at startup pressure continually deteriorated until some actuators had to little pressure to do the specified work. There were over 100 Air Cylinders on the prooduction line that was 250' long and figuring the amount of air required for the desired cycle using th swept volume of the cylinders proved a 2" supply should be ample. However, all the valves for the actuators were grouped at support columns and required flow lines between the valves and cylinders up to 20' long. Those long flow lines had to be filled and exhausfed each cycle and were actually using more air than the actuators. A second 2" Air Line was run to the machine to allow it to run the design cycle.

Free Air is not free, it is quite expensive and needs to be used frugally to keep cost of machine operation low.

Tube Length must be considered since the tubes must be filled and exhausted each time an Air Cylinder Cycles.

at liftandlube.com we design air supply systems for factories and auto dealer service bays. as mentioned before the tube size will matter as will the number and function of the work stations but most industrial size FRl units can handle cfm over your needs chek out thesee links and see if these work , remember to add lots of chek valves and moisture loops.

http://www.liftandlube.com/SearchResults.asp?Search=frl

http://www.liftandlube.com/product_p/gra%20217072.htm

http://www.liftandlube.com/product_p/gra%20217073.htm

http://www.liftandlube.com/product_p/gra%20217072.htm

http://www.liftandlube.com/product_p/gra%20217072.htm

http://www.liftandlube.com/product_p/gra%20217072.htm

IF YOU NEED LARGER JUST LET ME KNOW THIS IS WHAT WE STOCK ON OUR WEB SITE FOR AUTO DEALERS, BUT CAN GETUP TO 2"

ALSO we AT LIFTANDLUBE.COM the new rep for TRANS AIR the latest technology for aluminum air lines, they used to be only for hospitals and clean rooms but now are avsilable for industry use, material cost is higher, but it can be installed by one person, one installer can take 10 to 20 tubes up on a sizzor lift and install alone, joints can be replaced to add down lines with out removal of any existing pipe, TRY THAT WITH GAL. STEEL! no need for a pipe threader or pipe fitters so after install cost is figured in, it actualy comes out cheaper and last longer, no iron contamination in the lines, just plain better let me know if we can help you more newmanshopmanager@bellsouth.net