RL series cylinders have an anodized aluminum housing and precision ground tool steel locking mechanism and are rated for four million actuations. They offer a 200 msec response time, low backlash, and zero rod movement on actuation. Compressed air opens the rod lock; when air is exhausted, spring force actuates a mechanism to unlock the unit. A 3-way air valve controls the rod lock unit.
TRD Mfg. Inc., (815) 654-7775,