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The NITRA D-Series tie rod cylinders include bore sizes from
1-1/2" to 4" and stroke lengths from 1" to 24" to meet a broad
range of applications where abusive conditions exist.
NFPA Tie Rod Cylinders
NITRA NFPA Cushioned Cylinders
Cylinders - how they work
During the piston travel in either direction, full flow is exiting exhaust port until the piston rod extension reaches its seal. At this point all remaining flow is diverted thru the reduced path which is even more restricted by an adjustable screw type valve. Thus softening or cushioning the piston impacting the cap.