Patent ID: 6431229
Filing Date: 2002-08-13
Classification: F17C,Y10T

Abstract:
A purgeable manifold for transfer of low vapor pressure high purity chemicals in a high purity chemical delivery system, comprising:(a) a first conduit for detachably connecting a first vessel, for containing the high purity chemical, to a second vessel of high purity chemical, a source of pressurized gas and a source of vacuum; (b) a first block valve assembly having first and second diaphragm valves, each diaphragm valve having a diaphragm and having a valve seat side and a diaphragm side, wherein the valve seat side of each diaphragm valve is juxtaposed to the other valve seat side of the other diaphragm valve, and each valve seat side of each diaphragm valve having high purity chemical flow communication with said first conduit; (c) a first low dead space connector in said first conduit for detaching said conduit from said first vessel; (d) a second conduit, for delivering low vapor pressure, high purity chemicals to said first vessel from said source of high purity chemical refill, said second conduit connected to the diaphragm side of said first diaphragm valve; and (e) a third conduit, for communicating in a sequenced manner, pressurized gas and vacuum to said first conduit, connected to the diaphragm side of said second diaphragm valve.