| 摘要 |
A three position height control valve having a damping piston, a valve operator and valving components for controlling flow of fluid between a high pressure source, a low pressure source and a leveler unit. The valve piston orifices are varied by adjustable temperature responsive control rods to maintain a uniform damping action. Check valves allow flow of make-up fluid from one end of the piston to the opposite end thereof. They are carried by a tray on the end of the piston and movable apart therefrom to permit a quick return of the damping piston to a centered position.
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