For sale is a Penn Actuator. This actuator spent its early life opening and closing the louvers at the top of a Sullair Model 12B- 50L, 50 HP rotary screw type air compressor. Actuator is labeled "solid state". Mounting bolt holes are 4" (center to center) (F to B) and 4-3/4" (center to center) (L to R). The compressor had 44,467 hours on the meter when it was removed from use at a Midwest manufacturing plant. The compressor worked at time of removal.