Spring force mechanically locks and air pressure unlocks the clamp, so pressure loss locks the unit. High locking force holds the rod in any midstroke position, although actual force depends on rod ...
The RLSS Series of static rod locks from Nexen, Vadnais Heights, Minn., have large clamping surfaces for consistent holding forces ranging from 180 to 5,000 lb. Users can even stack several rod locks ...
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