Systems and methods for controlling flow with a 270 degree rotatable valve

A method for controlling fluid flow through a valve assembly, the method comprising:

• providing a valve body having a valve chamber and a plurality of ports into the valve chamber, the plurality of ports comprising a first port, a second port, and a third port, the valve body configured to receive a first fluid supply at the first port and a second fluid supply at the second port;
• and
• rotating a stem of a valve member located within the valve chamber about a rotational axis and along an angular travel of approximately 270 degrees between a first end position in which the first port is fluidly connected with the third port and the second port is closed and a second end position in which the second port is fluidly connected with the third port and the first port is closed;
• wherein travel of the valve member between the first end position and the second end position continuously regulates a flow rate of the first fluid supply to the third port and continuously regulates a flow rate of the second fluid supply to the third port without mixing the first fluid supply and the second fluid supply;
• wherein the valve member is configured to be held stationary at a desired setpoint corresponding to any rotational location along the angular travel.

A system for controlling fluid flow, the system comprising:

• a valve assembly comprising:
• a valve body having a valve chamber and a plurality of ports extending from the valve chamber, the plurality of ports comprising a first port, a second port, and a third port, the valve body configured to receive a first fluid supply at the first port and a second fluid supply at the second port;
• and
• a valve member located within the valve chamber and including a stem configured to be rotatably coupled to an actuator,
• wherein the valve assembly is configured so that the valve member is rotatable about a rotational axis and along an angular travel of approximately 270 degrees between a first end position in which the first port is fluidly connected with the third port and the second port is closed and a second end position in which the second port is fluidly connected to the third port and the first port is closed;
• wherein the valve assembly is configured so that the valve member between the first end position and the second end position continuously regulates a flow rate of the first fluid supply to the third port and continuously regulates a flow rate of the second fluid supply to the third port without mixing the first fluid supply and the second fluid supply;
• and
• wherein the valve member is configured to be held stationary at a desired setpoint corresponding to any rotational location along the angular travel.

A system for controlling fluid flow, the system comprising:

• a valve assembly comprising:
• a valve body having a valve chamber and a plurality of ports extending from the valve chamber, the plurality of ports comprising a first port, a second port, and a third port, the valve body configured to receive a first fluid supply at the first port and a second fluid supply at the second port;
• and
• a valve member located within the valve chamber and including a stem configured to be rotatably coupled to an actuator wherein the stem is rotatable to achieve a desired setpoint at which the valve member is held stationary and wherein the desired setpoint corresponds to any rotational location along an angular travel;
• wherein the valve member is rotatable about a rotational axis and along the angular travel of approximately 270 degrees between a first end position in which the first port is fluidly connected with the third port and the second port is closed and a second end position in which the second port is fluidly connected to the third port and the first port is closed;
• and
• wherein travel of the valve member between the first end position and the second end position continuously regulates a flow rate of the first fluid supply to the third port and continuously regulates a flow rate of the second fluid supply to the third port without mixing the first fluid supply and the second fluid supply such that the first fluid supply does not fluidly couple with the second fluid supply.