Abstract: A sound damping wallboard and methods of forming a sound damping wallboard are disclosed. The sound damping wallboard comprises a gypsum layer with a gypsum surface having an encasing layer. The encasing layer is partially removed to expose the gypsum surface and form a gypsum surface portion and a first encasing layer portion on the gypsum layer. A sound damping layer is applied to the gypsum layer to cover at least part of the gypsum surface portion and the encasing layer portion.

Abstract: A temperature-responsive, locking mechanism is provided for a valve which has a rotary operating assembly journaled in a housing. The mechanism comprises an annulus coupled to the assembly for rotation therewith. A fluid temperature-operated electric switch is external of and coupled to the housing. A solenoid is mounted in the housing. A source of electric power is connected to the switch and the solenoid. The switch ia coupled to the solenoid for effecting solenoid operation, and locking means, coupled to the solenoid, and in proximity to the solenoid is actuable in response to solenoid operation for engaging the annulus and preventing rotation of both the annulus and the assembly.

Abstract: A diaphragm valve which mounts directly on a tank bottom provides positive isolation between the vessel and downstream piping. When closed, the diaphragm seals against the valve body weir to seal the valve, and when opened, the valve provides a smooth, crevice free, drainable passageway to the downstream piping.

Abstract: The subassembly is an integrated unit in which the operating internals of the ball valve are coupled to, and removable with, the ball valve cover. A flexible, U-shaped band, removably fastened to the cover, holds seat rings captive therein, and positions the rings at opposite, axial sides of the valve ball.