Abstract: A stream selector for a process analyzer prevents contamination of one sample from previous samples without requiring a common outlet header. The stream selector includes a valve manifold having a base plate and a series of valve modules individually removeably attached to the base plate. The base plate includes all the process connections for the fluid lines. Each valve module includes a module body with a pair of valve assemblies. The valve assemblies in each module are operated simultaneously through a common actuation passage. A poppet valve in each valve assembly has a valve head with a double-seated seal. The double seated seal controls the flow of fluid through a vent passage in the valve body; and between inlet and outlet passages in the valve body. The outlet passage from one valve assembly is fluidly-connected to the inlet passage of an adjacent valve assembly to create a double-block and bleed configuration. The downstream valve assembly is then connected to the process analyzer.

Abstract: A method of producing sheet material consisting of clay, glass fibers and a latex resin and the product produced thereby.