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1.1 The gas valve testing device VPU 500 GI is designed for effective testing of gas valves in 2-stroke marine gas engines. Well-functioning and non-leaking gas valves are essential for gas engines safety and provide an efficient combustion and therefore low fuel consumption.

If the self-test procedure can be executed without problems, the VPU 500 as such is working as advertised. If air flow seems to be sufficient, and pressure cannot be built up, please verify hydraulic flow from unit at 0 bar and at 300 bar.

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VPU 500 GI is a pneumatic/hydraulic test rig designed for testing of gas fuel injectors on 2-stroke engines. It features a robust design and is suitable for testing gas injector, window and blow-off valve with 300 bar or 400 bar of nitrogen, depending on engine type. Test units are supplied for the following engine types:

VPU 500 self-test procedure. Follow below procedure in order verify VPU units capability for building up a suitable pressure and maintain it. Numbers in brackets refers to the number of the position which should be operated.