This Lochinvar Venturi Valve, identified by the model number PF/PB702-1002-M9, is a crucial component in various heating systems. It is designed to regulate the flow of gas or fluid within a system by creating a pressure differential. The valve operates on the Venturi effect principle, which involves fluid dynamics and pressure changes. The Lochinvar Venturi Valve is made from durable materials that can withstand high temperatures and pressures, ensuring longevity and reliable performance. It is compatible with specific models of boilers and water heaters manufactured by Lochinvar. This valve's precise design allows for efficient operation and accurate control of fluid or gas flow rates within the system it is installed in.