Abstract: A valve system for protection of the valve surface from abrasion and wear normally caused by the flow vertically therethrough of wear-causing materials, such as pulverized cement, sand, ashes, ground and stone dust, hydrated lime, zincoxide, zinc mixtures, aluminum oxide, perlite, sewage and other granulated or comminuted fluid materials in a dry or liquid state, often piped under considerable pressure differences, has an elongated vertical housing with a funnel on top, an annular seat with an orifice wider than that of the funnel beneath it, a bulbous valve for closing the seal from the side opposite of the funnel and protruding into the seat when closed, means of support of the valve pivotally attached to the valve and control means of the means of support, to swing the valve laterally in and out of sealing position with the seat.

Abstract: A gate valve includes a pair of identically shaped tapered discs defining a tapered self-locking axially translatable gate wherein each disc has an annular hardened seating surface which engages the mating surfaces on the valve body adjacent the flow ports. Tongues on the sides of the discs ride in vertical grooves on the valve body as the gate travels between a raised open and a lowered closed position. The discs of the gate are provided with a slot transverse to the flow ports which captures a T-head on the stem assembly, the slot being positioned in the gate interior radially within the seating contact area to thereby reduce the overall height of the valve.

Abstract: A high-low shutoff valve of the reciprocating ball type which does not vent fluid to atmosphere upon the closing of the valve in response to operation of either the high or low pressure pilot.

Abstract: An eccentrically rotatable control valve having a spherical shaped valve plug is positioned in a valve chamber to regulate the flow of fluid there through. The valve plug is retained in a loosely captured position by means of a bolt and spring to the end of a valve actuating arm for flexible, swivel movement thereon. This construction enables the plug to be initially rotated from a completely open position into line contact with a part of the valve seat in the wall of the chamber, and to then be jointly tilted and rolled about this seat part into and out of fluid tight surface to surface contact with the entire valve seat. The plug and arm are mounted on and for limited longitudinal movement with an associated valve actuator shaft that extends through the chamber. The latter construction provides a means by which the plug can center itself in a properly seated fluid tight position on the seat in the event that the valve seat is out of properly aligned seating surface engagement with the plug.

Abstract: An isolating valve or damper for the gas-tight closure of a flue or duct, comprising a frame or housing fitted in the flue or duct and a closure member operable between an open position and a closed position in which the member closes the flue or duct, wherein the closure member is a lightweight low inertia body, preferably a cone or a sphere, and wherein the closure member may be moved between its open and closed positions by means of a rapid-acting operator.

Abstract: A water valve comprises a housing in which a spring biased slider moves between a sealing wall and a sliding wall normal to the liquid flow direction, the spring contacting the sliding wall of the housing.