An oscillation apparatus, system, and method are provided for creating pulsing pressure waves in a fluid flow that can be used to open and close flow paths for fluid flow in a reservoir, mixing a fluid, or keeping a particulate suspension homogenous in a fluid. The system includes an oscillation apparatus including a motor and an oscillating valve that rotates at a particular speed and frequency while a pump circulates a fluid through the oscillation apparatus, which outputs the fluid in a pulsing wave. The apparatus or system may further include one or more sensors and a control system that control the speed and the frequency of the rotation of the oscillating valve.

The valve system, to be used as a suction valve and/or as a discharge valve in a reciprocating compressor, comprises a valve body, at least one sensor mounted on the valve body and configured to detect a parameter associated to operation of the valve device, and a wireless communication unit electrically coupled to the at least one sensor and configured to transmit information detected by the at least one sensor; the at least one sensor is associated with a fixing member that is inserted in holes of the valve body and that seals the holes. The innovative valve system may comprise further at least one energy harvesting system, which could be for example thermoelectric or piezoelectric, located preferably in or on or at the valve body.

The valve system, to be used as a suction valve and/or as a discharge valve in a reciprocating compressor, comprises a valve body, at least one sensor mounted on the valve body and configured to detect a parameter associated to operation of the valve device, and a wireless communication unit electrically coupled to the at least one sensor and configured to transmit information detected by the at least one sensor; the at least one sensor is associated with a fixing member that is inserted in holes of the valve body and that seals the holes. The innovative valve system may comprise further at least one energy harvesting system, which could be for example thermoelectric or piezoelectric, located preferably in or on or at the valve body.