Pressurised hot-water generator for mobile cleaning unit - has parallel non-return valves working in opposite directions between pump and heater

摘要

The pressurised hot-water generator equipment of mobile type is esp. for use in cleaning and degreasing machinery. A water pump is followed by a heat exchanger, a stop valve at the outlet from the latter actuated by the operator and an automatic monitoring unit. This has a pressure detector reacting to water pressure nd controlling pump operation. Between the pump and the heat exchanger are two non-return valves connected in parallel and working in opposite directions. Each valve can have two chambers, the hydraulic connection between which is controlled by a plug. The chambers are connected in pairs on one side to the pump and on the other to the heat exchanger. The plugs are spring-loaded, so that the connection from pump to exchanger is feed before that in the clear direction.