Proportional valve with direct drive closed-loop pilot valve

The latest version in this series is a two-stage valve with a closed loop controlled D633 Direct Drive Servo Valve as the pilot stage. This is said to provide increased dynamics, repeatability, and to be more robust than the existing version, making it suitable for use in even the most demanding environments.

The D633 Direct Drive Servo Valve pilot stage with open loop control has been available for many years. Moog developed the new version in conjunction with machine builders in the plastics metal forming, presses and steel production sectors, to better meet the needs of these applications.

The new pilot stage option is suitable for applications requiring high dynamic performance, where longer service life and energy efficiency are critical. The Moog D680 Series Proportional Valve series is a proven design that provides reliable control for machinery in industries such as injection and blow molding, die-casting, steel production, metal forming and presses and lumber processing. The product range can be easily integrated in new designs, and configured to meet the exact application and performance requirements of industrial machinery and equipment.

In addition to the existing series’ proven dynamic performance, the latest D680 Proportional Valve design is robust, reliable, and offers a long service life and energy savings.

Dr. Marco Wiegandt, Moog valve development engineering manager comments: "Our customers in the injection molding, die casting and metal forming and press markets trust the performance and reliability of Moog’s Servo valve products. Some of our lead customers have enjoyed greater repeatability and a long service life by using this energy-efficient, robust design. In machine applications where high accuracy and repeatability are required, the new D680 Series Proportional Valve with a closed loop D633 pilot valve is an excellent choice."