Volon NRS valves are a type of gate valves that do not have a rising stem. These valves are designed to meet the UL/FM (Underwriters Laboratories/FM Global) standards. Gate valves are commonly used in various industries to control the flow of fluids through pipes. The absence of a rising stem in Volon NRS valves means that the stem does not move vertically when the valve is opened or closed. This design feature provides a compact and efficient solution for fluid control applications. The UL/FM certification ensures that these valves meet the required safety and performance standards, making them suitable for use in fire protection systems and other critical applications. With their reliable performance and compliance with industry standards, Volon NRS valves offer a reliable and safe solution for fluid control needs.