AUTOFLAME Mk8 MM, Technical Manual

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1 Sensors
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MM Application Possibilities
Figure 1.1.3.ii Mini Mk8 MM Valve Proving Diagram
Figure 1.1.3.ii shows the valve proving operation in the Mini Mk8 MM. The tests have been designed
on the Mini Mk8 MM used with block valves; a pressure drop is seen when the valves close after the
‘void to air’ and ‘void to gas’ states.
In the VPS air proving phase, after the valves close, there is a 1.5 second delay before the pressure
reading is taken.
In the VPS gas proving phase, after the valves close, there is a 1.5 second delay before the initial gas
pressure reading is taken. The reading taken after this delay must be at least 80% of this measured
static pressure.