There are three basic handle designs that are compatible with any 2" to 12" (50 to 300 mm) valve: ten-position locking, two-position locking and memory stop.
Memory stop handles provide throttling, which is infinitely adjustable and can be set by a lock nut with a memory-stop setting (adjustable open stop).
Handles are available in basic trim, corrosion-resistant trim and sanitary trim.