8
8
PNEUMATIC INFORMATION, Continued
COLD WEATHER OPERATION
If a tool does not operate satisfactorily in freezing temperatures, certain steps can correct the
problem. The following steps can be taken to improve cold weather operation of the tool:
a.
An air line dryer adjacent to the compressor.
b. Use lubricant recommended by Signode. Signode has tested the use of anti-freezes, none
work well in air tools; the tool will gum up when anti-freezes are introduced and will not
function properly. The best lubricant for freezing weather is the 1 to 1 oil and kerosene
combination.
c.
If possible, run the air supply line to a indoor located Filter-Regulator-Lubricator or relocate
the F-L-R to a warmer operating area.
AIR CONSUMPTION
Air consumption in cubic feet per minute (cfm) for the PNSC-2 can be calculated as follows:
cfm = (a)x(b)x(0.23)
a = Number of straps applied per minute.
b = Number of seconds air motor is on per strap during tensioning, from start to finish
sealing.
0.23 = PNSC-2 efficiency ratio.
Example calculation:
(a)x(b)x(0.23)=4x5x0.23=4.6 cubic ft/min.
Peak strapping load is 4 straps/minute, so a=4.
Air motor is on 5 seconds/strap, so b=5.
PNSC-2 efficiency ratio is 0.23.
Air pressure is assumed to be 90 psig with the recommended size and length of air hose.
Volume of air at room temperature and sea level pressure, or so-called "free air" conditions. For
more detailed information about air supply systems, refer to Signode manual Part No. 186038.
AIR LINE PRECAUTIONS
Strap tension is controlled by air pressure. Use the proper air line piping and lubrication as
specified in this manual. Your air pressure gauge must be accurate, therefore, confirm its
accuracy by comparing it to a calibrated master gauge.
Strap breakage hazard. 3/4" (19mm) strap can break during tensioning if inlet air pressure to
the tool exceeds 70 psig. Strap breakage can result in severe personal injury. Maximum
operating pressure is 90 psig.
