| 摘要 |
A valve arrangement is disclosed which comprises a body provided with a bore, first, second and third passages communicating with the bore at axially spaced locations. A valve member is engageable with a first seat to control fluid flow between the first and second passages. A valve element is engageable with a second seat to control fluid flow between the second and third passages. A spring biasses the valve element away from the second seat, and an extensible member interconnects the valve element and the valve member. The valve member is thus biased toward the first seat.
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