Norgren NFPA Aluminum & Steel Cylinders - Manual (Page 17)

Brookville, OH USA Phone 937-833-4033 www.norgren.com ACT-1-17
Series A & EA, NFPA Aluminum Air Cylinders (ø1-1/2" to 8"), Breakaway Pressures
Series J & EJ, NFPA Steel Air Cylinders (ø1-1/2" to 12"), Breakaway Pressures
Bore Series J Low Friction Seals (LF)
Extend Retract Extend Retract
1 1 /2", 2", 2 1 / 2 " 5 6 3 4
3 1 / 4 ", 4" 4 5 2 3
5", 6", 7", 8" 3 4 1 2
10" 3 4 1 2
12" 3 4 1 2
Breakaway Pressures
An average of 5 pounds (psig) is necessary to breakaway non-
cushioned Series J air cylinders when mounted horizontally
with no load on the piston rod. Double rod end cylinders
require an average of 7 pounds (psig). An average of 6 pounds (psig) is required to breakaway single
rod and Series A & J and Series EA & EJ air cylinders
equipped with optional non-adjustable air cushions. Double
rod end cylinders require an average of 8 pounds (psig).
These figures are for non-cushioned
cylinders with strokes of 6 inches or
less with factory lubrication. Consult
the factory if your application requires
a lower breakaway pressure or a
guaranteed minimum breakaway.
Series A & J cylinders with 3-1/4" thru
12" diameter pistons are counterbored
to provide a larger area for the
pressure
to act upon.
Listed are the average breakaway
pressures in PSI for all Series J & EJ
Cylinders. If your application requires a
lower breakaway pressure than
indicated for a particular bore size,
consult the factory.
Breakaway Pressures in PSI
Note: Breakaway pressures were established with
the cylinders mounted horizontally and no load on
the piston rod.
Bore Series A Low Friction Seals (LF)
Extend Retract Extend Retract
1 1 /2", 2", 2 1 / 2 " 5 6 3 4
3 1 / 4 ", 4" 4 5 2 3
5", 6", 7", 8" 3 4 1 2