Importance

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Abstract

A poultry drinker system includes a number of drinker runs each including a selector valve, a drinker line control valve and a drinker line having a plurality of drinkers. The selector valve applies to the corresponding drinker line control valve either an intermediate control pressure or a relatively high inlet pressure. Control pressure is derived from inlet pressure by an adjustable pressure reducing controller. In the absence of control pressure, a low pressure is applied to the drinker line control valves. Each drinker line control valve includes a proportional relay valve that is closed when low pressure is applied to the drinker line control valve and is open when intermediate pressure is applied to the drinker line control valve. When open, the proportional relay valve supplies to the corresponding drinker line a low pressure outlet flow proportional to control pressure. Each drinker line control valve includes a relief valve that is closed when low or intermediate pressure is applied to the drinker line control valve and is open when high pressure is applied to the drinker line control valve. When open, the relief valve supplies to the corresponding drinker line a high pressure rinse flow. The proportional relay valve and relay valve are integrated and share a common valve orifice and valve seat.

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First Claim