Marshall Excelsior excess flow valves

The excess flow valves from Marshall Excelsior are intended for use in liquid LP gas applications such as protecting dispenser piping and transfer systems. This product is designed to protect against excessive discharge as a result of a break in the hose or piping system. The excess flow feature is designed to remain closed after activation until the system pressure equalizes on both sides of the shutoff poppet. The valves are intended for direct installation into pressure vessels and/or piping. The precision-machined valves feature durable brass construction, all-stainless-steel internal components and a threaded poppet design for reliability in service. An integral breakaway feature leaves valve assembly intact with internal hex broach for easy removal. The company warns that an excess flow valve will not activate if there is a break or leak downstream of the valve that does not equal or exceed the closing flow of the valve or if the excess flow valve installed exceeds the flow capacity of the system.