Proportional Control, Spring Return, Linear Movement, Nema 1 Enclosure Pneumatic Valve Actuator (6 square inch) with 1/8″ NPT Air Connection and 1/2″ Nominal Stroke (3-7 PSI, 5-10 PSI, or 8-13 PSI range)
MK-2690 is identical to 23-102, MK-2690-0-0-2