Aladco LLC, a wholly-owned subsidiary of Aladdin Engineering and Manufacturing, Inc., is a cutting-edge force in pilot-operated pneumatic check valves throughout the world. Making Automation Great Since 1986, Aladco has designed and patented top-of-the-line proprietary brands: Nu-Check, Dual-Check, Clean-Check, Air-Fuse, Balance-Check and Equa-Check, Grip-Clamp Heavy-Duty Automation Grippers, Roller-Cam Clamp for Jigs & Fixtures and special machine accessory components. Our patented valves have a unique manual override feature that prevents movement of actuators if air pressure is lost. Unlike a conventional check valve, the Aladco pilot-operated check valve can be opened by inlet pressure, pilot pressure, or manual override button. Aladco continually strives to exceed customer expectations and is dedicated to delivering high-quality products.