Infusion/mixer pump system—pump with integrated gas liquid mixing valve in an enclosure

A pump system comprising:

• an integrated infuser/mixer pump system having a pump manifold with
• a liquid inlet port configured to receive a liquid drawn from a liquid source;
• a gas inlet port having an inner cylindrical surface, and being configured to receive an inlet gas from a gas source;
• a pump motor and pump head combination having a pump head and a pump motor and being configured to receive the liquid and provide pumped liquid;
• a gas/liquid mixture chamber formed inside the gas inlet port and configured to receive the pumped liquid and the inlet gas, mix the liquid and the inlet gas and provide a gas-infused mixture;
• and
• a gas-infused mixture chamber outlet port configured in relation to the gas/liquid mixture chamber to provide the gas-infused mixture;
• and
• a gas inlet fitting formed as a separate component from the pump manifold and installed directly into the inner cylindrical surface of the gas inlet port of the pump manifold, the gas inlet fitting having a gas liquid mixing valve configured inside the gas inlet fitting and being replaceable, the gas liquid mixing valve having a mixing orifice with a mixing orifice size dimensioned to provide the inlet gas to the gas/liquid mixture chamber with an inlet gas volumetric flow rate in order to mix the pumped liquid and the inlet gas with a predetermined mixture ratio that depends on the mixing orifice size.