Multi-switch pump assembly

A pump assembly comprising:

• a pump body;
• a first pump stage having a first fluid inlet and a first and a second fluid outlet;
• a second pump stage having a second fluid inlet and a third and a fourth fluid outlet;
• a mixing chamber in fluid communication with the second fluid inlet and the second fluid outlet;
• and
• a pump motor connected to a motor shaft, where the motor shaft is connected to a first impeller located in the first pump stage and to a second impeller located in the second pump stage;
• and
• a valve assembly and an actuator housed in a pump section, the valve assembly including a first valve member mounted between the first impeller and the first and second outlets of the first pump stage and a thimble attached to the first valve member bottom surface, wherein the valve assembly is operable into one or more switched positions by the actuator to:
• connect the first fluid inlet through the first pump stage to the first fluid outlet and the mixing chamber through the second pump stage to the third fluid outlet;
• connect the first fluid inlet through the first pump stage to the second fluid outlet and to the mixing chamber, wherein the fluid from the second fluid inlet and the fluid from the second fluid outlet are mixed in the mixing chamber;
• and
• connect the first fluid inlet through the first pump stage to the second fluid outlet to connect the mixed fluid through the second pump stage to the fourth fluid outlet.

A method for switching fluid from a pump assembly, the pump assembly including a first pump stage having a first and second fluid outlets connected to a first fluid source, a second pump stage having third and fourth fluid outlets, a mixing chamber connected to a second fluid source and to the second pump stage and an integrated valve assembly movable into plurality of switched positions, the method comprising:

• moving the valve assembly into a first switched position, wherein the first pump stage pumps fluid from the first fluid source from the first fluid outlet and the second pump stage pumps fluid from the mixing chamber and the second fluid source from the third fluid outlet;
• moving the valve assembly into a second switched position, wherein the fluid from the mixing chamber and the second fluid source is pumped from the fourth fluid outlet;
• moving the valve assembly into a third switched position connecting the second fluid outlet and the fluid from the first pump stage to the mixing chamber, wherein the fluid from the first pump stage is mixed with the fluid from the second fluid source and pumped by the second stage from the third fluid outlet;
• and
• moving the valve assembly into a fourth switched position connecting the second fluid outlet and the fluid from the first pump stage to the mixing chamber, wherein the fluid from the first pump stage is mixed with the fluid from the second fluid source and pumped by the second pump stage from the fourth fluid outlet.