Jet diversion device for injection pump in test state

In the present invention there is disclosed a device for diverting the flow a test room of injection pumps. A movable flow deflector (11) is pivotally arranged between the injection jet interceptor and an associated measurement vessel to divert the test oil coming from the interceptor, via at least one oil line, to the tank. The flow deflector (11) and the oil line to the tank form a closed system (27) for the test oil to be fed out. The flow deflector (11) has inlet holes (25) associated with the interceptor and lying under the interceptor in the pivoted in position. The oil line is connected to the flow deflector (11) and, at least in the connection region, is formed as a flexible hose (23). When removing hot test oil between measuring breaks, generation of oil vapors and aerosols is thus substantially reduced.