| 摘要 |
A rotary metering valve arrangement comprises a rotary metering valve arrangement comprising a rotary metering valve (20) arranged to control the supply of fuel to a Pressure Raising and Shut-Off Valve (PRSOV) (24), the metering valve (20) comprising a valve plate (26) provided with first and second latching ports (66,68) and an angularly movable valve element (30) provided with a recess (76) registrable, in use, with the first and second latching ports (66,68) to control communication therebetween, the PRSOV (24) comprising a valve member (54) slidable within a bore provided with third and fourth latching ports (72,74), the valve member (54) being provided with a recess (78) registrable, in use, with the third and fourth latching ports (72,74) to control communication therebetween, the second and third latching ports (68,72) communicating with one another.
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