Patent ID: 6648034
Filing Date: 2003-11-18
Classification: B08B,C23C,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 container for containing a quantity of said low vapor pressure, high purity chemical having at least two ports capable of receiving or dispensing said low vapor pressure, high purity chemical; (b) a first conduit for detachably connecting said first container to a point of source or dispense of said low vapor pressure, high purity chemical, said first conduit having a first end and a second end and a first low dead space connector for detaching said first end of said first conduit from said second end of said first conduit; (c) a first block diaphragm 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 low vapor pressure, high purity chemical flow communication with said first end of said first conduit, and said diaphragm side of said first diaphragm valve having flow communication with a first of said at least two ports, and said diaphragm side of said second diaphragm valve having flow communication with a conduit capable of a function selected from the group consisting of a source of push gas, a source of purge gas and a source of vent; (d) a second block diaphragm valve assembly having third and fourth 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 flow communication with said second end of said first conduit, and said diaphragm side of said third diaphragm valve having flow communication with a conduit capable of a function selected from the group consisting of a source of purge gas and a source of vacuum, and said diaphragm side of said fourth diaphragm valve having flow communication with a conduit capable of a function selected from the group consisting of a source of push gas, a source of bubbling gas and a dispense for low vapor pressure, high purity chemical; and (e) said second port having flow communication with said first container and capable of a function selected from the group consisting of delivering push gas to said first container and dispensing low vapor pressure, high purity chemical in a push gas from said first container.