Ames Fire & Waterworks 940GS-04-19,LF940GD-04-19 is a Non-Surge Check Valve designed to control pipeline surges caused by flow reversal by slowly opening and closing at separate adjustable rates. It opens when upstream pressure is greater than downstream pressure and closes when downstream pressure is higher than upstream pressure. The Adjustable Opening and Closing Speed Controls allow for precise control of the valve's operation, ensuring a smooth and controlled flow of fluid.

This valve is particularly useful in applications where sudden changes in flow direction can cause pressure surges, such as in pumping systems, pipelines, and other fluid handling applications. By preventing these surges, the valve helps to protect the system from damage and ensures a reliable and efficient flow of fluid.