At Deltrol Fluid Products, our mission is to create and maintain an image of leadership, quality and integrity with our customers, employees and suppliers. We continually strive to be a world-class manufacturer of cartridge valves, custom manifold systems, and in-line valves.  History Located in Bellwood, Illinois, just outside of Chicago, and founded in 1963, Deltrol Fluid Products designed and manufactured in-line accessory hydraulic and pneumatic flow, needle, and check valves. When screw-in style cartridge valve technology developed, our product offering expanded to include cartridge valves.  Now, over fifty years since our founding, we have expanded our product line to include a full line of solenoid and manual operated, directional control, flow control, and pressure control screw-in and slip-in style cartridge valves.  We offer a comprehensive line of standard products and thrive on providing custom valves and integrated circuits that meet our customers’ needs.  Design Our design group is divided into two cross-functional teams, which allows us to focus on product designs that meet our customers’ requirements. The valve design group can develop valves independently or integrate with our systems design group based on customers’ special applications and needs. Our three-dimensional modeling software enables us to create the most compact and efficient solutions for our customers.  Integrated manufacturing  Our vertically integrated manufacturing facility enables us to produce high quality, cost effective parts on site. Our state-of-the-art assembly and test equipment ensure efficient through-put that meets our demanding quality standards.