I would appreciate any input of what you have done in the past for adding a stop ring on the piston.
Curiosity here, maybe one of the code gurus can steer me. What if, you used a piston gripper to stop upward movement after code dictated over travel? Maybe have a vane, or cam with a limit switch, that could activate the gripper? Think this would meet code? Remember the piston does have a stop ring to prevent catastrophe, so if all we needed to do was reduce over travel.... Just a weird thought I had.
If a pistol gripper was utilized in suck a fashion, the stop ring would still be the final limit in which the piston can travel when electrical or mechanical devises fail.
Solidstate,
When was the unit installed?
Has the unit been modernized?
How old is the jack assembly?
How Is the controller and car station being changed to eliminate the 6th?
If they truly wish to eliminate the 6th floor, the system should be modernized to reflect such a change. If the unit is to be modernized and the jack assembly isn't being replaced, then I agree a sleeve is a great solution to shorten the travel of the piston.
If they don't wish to modernize the unit, why not just disconnect the car and hall calls for the 6th floor at the controller?
JKH
95
no
21 years
removing wires and buttons, moving terminal and finals down
There will be no access(locked service access door) to the current 6th floor.
Code requires a mechanical stop at the top floor. I assume in case of entrapment, and the electrical stops fail to prevent the car from continuing to run. It could be difficult to free the entrapped passengers.