Patent ID: 7216528

Claim:
A diaphragm-sealed valve comprising: a first body having a first interface provided with a recessed fluid communication channel extending therein, said first body having a first, a second and a common fluid port, each of said ports opening into said recessed fluid communication channel for interconnecting each of said ports together through said fluid communication channel, each of said first and second ports being provided with a seat disposed so as to allow fluid communication therearound within said communication channel; a second body interconnected with said first body and having a second interface facing said first interface, said second body having a first and a second passage, each of said passages facing one of said first and second ports respectively; a seal member compressibly positioned between said first and second interfaces, said seal member having a shape adapted to cover said first and second ports, said seal member comprising a Teflon spacer, a metallic diaphragm and a polymer diaphragm, each being arranged in a stacked relationship, said polymer diaphragm being pressable against the seat of each of the first and second ports; a first and a second plunger, each being respectively slidably disposed in one of said passages of said second body, each of said plungers having a closed position wherein the corresponding plunger presses down the seal member against the seat of the corresponding port for closing said corresponding port, and an open position wherein said plunger extends away from the seat of the corresponding port for allowing a fluid communication between the corresponding port and said channel; and actuating means for actuating each of said plungers between said closed and open positions thereof.