If after venting compressed air energy, there is a risk of movement or dropping because the pneumatic energy isnt holding things in place, there must be manually inserted safety pins or jigs, or automatically actuating clamps/brakes integrated into the cylinder.
However, for the integrated clamps I have seen that such clamps are not accepted in certain industries, but I dont know the exact reasoning.
However, for the integrated clamps I have seen that such clamps are not accepted in certain industries, but I dont know the exact reasoning.