Multi-fluid delivery system

A method of operating a fluid delivery system (100;

• 100′;
• 100″;
• 200;
• 200′;
• 300;
• 400;
• 400′;
• 400″;
• 500) for delivering at least a first fluid and a second fluid, said first fluid being different from said second fluid, said method comprising:
• a step of delivering the second fluid outside of the fluid delivery system;
• a step of recirculating the first fluid internally to the fluid delivery system, and
• a step of delivering the first fluid outside of the fluid delivery system.

A method of operating a fluid delivery system (100;

• 100′;
• 100″;
• 200;
• 200′;
• 300;
• 400;
• 400′;
• 500) for delivering at least a first fluid and a second fluid, said first fluid being different from said second fluid, said method comprising:
• a step of delivering the first fluid outside of the fluid delivery system;
• a step of recirculating the second fluid internally to the fluid delivery system;
• a step of delivering the second fluid outside of the fluid delivery system, and
• a step of recirculating the first fluid internally to the fluid delivery system.

A method of operating a fluid delivery system (100;

• 100′;
• 100″;
• 200;
• 200′;
• 300;
• 400;
• 400′;
• 400″;
• 500) comprising at least one first supply station (10) for supplying a first fluid and at least one second supply station (10′) for supplying a second fluid, said second fluid being different from said first fluid, said fluid delivery system (100;
• 100′;
• 100″;
• 200;
• 200′;
• 300;
• 400;
• 400′;
• 500) further comprising a pressurizing unit (20) provided with a first pump module (30) and a second pump module (30′), each first and second pump module respectively comprising a chamber (31;
• 31′) and a piston (32;
• 32′) reciprocating (A;
• A′;
• C;
• D) therein, said piston (32;
• 32′) having a plunger (34;
• 34′) which, in cooperation with inner walls of said chamber (31;
• 31′), defines first (35;
• 35′) and second (36;
• 36′) variable-volume sub-chambers, the fluid delivery system (100;
• 100′;
• 100″;
• 200;
• 200′;
• 300;
• 400;
• 400′;
• 500) further comprising a first (60;
• 260) recirculation fluid pathway and a first actuator (70;
• 270) associated thereto for fluidically connecting said first (35) and second (36) variable-volume sub-chambers of said first (31) chamber, said method comprising the steps of:
• supplying the first fluid from the first supply station (10) to said first (35) and second (36) variable-volume sub-chambers of said first chamber (31);
• supplying the second fluid from the second supply station (10′) to said first (35′) and second (36′) variable-volume sub-chambers of said second chamber (31′);
• axially translating (A;
• A′;
• C;
• D) the respective pistons (32;
• 32′) within said first (31) and second (31′) chambers, and
• operating the first actuator (70;
• 270) for recirculating the first fluid within the first chamber (31).

A method of operating a fluid delivery system (400′;

• 400″;
• 500) for delivering a first fluid and a mixture of said first fluid with a second fluid, said first fluid being different from said second fluid, said method comprising:
• a step of delivering said first fluid outside of said fluid delivery system;
• a step of recirculating internally to the fluid delivery system said first fluid and said second fluid for making a mixture thereof, and
• a step of delivering said mixture outside of the fluid delivery system.