... . CE, ISO certificate 2. dual piston rack and pinion design, 3. Fast delivery double acting pneumatic valve actuator1. Extruded ... coefficient of friction.2. Dual piston rack and pinion design for compact construction, symmetric mounting position, high-cycle life ... life and prevent shaft blowout.4. Modular preloaded spring cartridge design, with coated spring for simple versatile range, reater safely ...