Abstract: In one example, a fluid system is provided that includes an air-operated fluid pump, a control air system operably connected with the fluid pump, and a pump controller operably connected with one or more components of the control air system. The pump controller is configured to automatically control the operation of the air-operated fluid pump by way of the control air system. The fluid pump parameters automatically controlled by the pump controller can include a discharge flow rate of the fluid pump, a discharge pressure of the fluid pump, and/or a pulsation value associated with the discharge of the fluid pump.

Abstract: In one example, a pump controller includes a power connection, one or more control signal connections, a feedback signal connection, one or more programmable elements, and one or more processors connected with the programmable elements and the feedback signal connection. When the programmable elements are programmed for automatic control of a fluid pump, the pump controller is operable to automatically control operation of the fluid pump through a closed loop system, and wherein the pump controller is further operable to control a pulse value associated with operation of the fluid pump.

Abstract: In one example, a displacement pump has a suction side including a suction check valve, and a discharge side including a discharge check valve. The discharge side and suction side are each configured for selective fluid communication with each other, and the suction check valve defines a flow area that is relatively larger than a flow area defined by the discharge check valve.

Abstract: In one example, a fluid system is provided that includes an air-operated fluid pump, a control air system operably connected with the fluid pump, and a pump controller operably connected with one or more components of the control air system. The pump controller is configured to automatically control the operation of the air-operated fluid pump by way of the control air system. The fluid pump parameters automatically controlled by the pump controller can include a discharge flow rate of the fluid pump, a discharge pressure of the fluid pump, and/or a pulsation value associated with the discharge of the fluid pump.