Rotary metering pump

The present disclosure provides a rotary metering pump. The rotary metering pump reciprocates and is reversed by a signal from a limit switch which is deflected by an actuation arm on a rotary sleeve of the pump system. The sleeve receives a gasket that forms a seal between the sleeve and the housing, the gasket having an opening surrounding a sleeve side bore to allow fluid to pass through the side bore between the pump volume and the inlet or outlet port of the housing. 本公开提供了一种旋转计量泵。该旋转计量泵往复运动，并通过来自限位开关的信号反转，限位开关由泵系统的旋转套筒上的致动臂偏转。套筒接收垫圈，该垫圈在套筒和壳体之间形成密封，所述垫圈具有围绕套筒侧孔的开口，以允许流体在泵容积和壳体的入口端口或出口端口之间通过所述侧孔。