Abstract: A pump assembly for use in fire fighting service is constructed of a single stage main pump and a two stage booster pump connected in series with the discharge of the main pump being connected to a first high flow rate fire fighting application and to the inlet of the booster pump and the discharge of the booster pump being connected to a second low flow high pressure fire fighting application. The impellers for both the main pump and the booster pump are mounted on a common rotating shaft so as to be driven thereby. A flow restriction and conduit means is provided to reduce the pressure on the booster pump seal. A by-pass conduit is arranged to conduct flow from the discharge of the booster pump back to the inlet of the main pump so that whenever the main pump is operated there will be flow through the booster pump to prevent overheating thereof.

Abstract: A centrifugal pump which is easy to clean, simple to assemble and disassemble, and economical to manufacture is disclosed. The pump comprises two cast metal casing members, one of which has an integral volute wall and the other of which has an oval partition providing an inlet plenum opposite the volute wall. A wear plate is interposed between the casing members to channel fluid in the desired direction through the pump. An impeller is mounted for limited axial adjustment on its engine shaft to adjust its clearance with the wear plate. The impeller also has specially-designed slinger teeth which function to minimize wear of the impeller shaft seal.

Abstract: A discharge valve for controlling the discharge flow of water from the delivery end of a fire pump including a valve body having an integral extension portion forming an inlet waterway for delivering water from the delivery end of the fire pump to the valve chamber of the discharge valve, a valve cover having an integral discharge portion for directing the water to the fire hose in a downward direction, and a push-pull drain valve formed integrally with and contained within the valve cover.

Abstract: Apparatus is provided for admixing a relatively small quantity of one fluid with a larger quantity of another fluid in a proportion which remains relatively constant over a wide range of demand flow rates for the mixed fluids. The apparatus comprises a body having an inlet cavity and an outlet chamber in fluid communication therewith through an annular port. A disc-like valving member is mounted for displacement vertically in the chamber into elevations which depend on the rate at which a primary fluid flows through the annular port. A reservoir for a secondary fluid has an upwardly-open orifice and is located interiorly of the annular port. The valving member has a central tapered plug which depends into the reservoir-orifice, and the valving member is weighted so as to be biased downwardly by a constant pressure into a normally-closed position blocking fluid flow through the annular port.

Abstract: An in-line ball valve having a locking device which permits the positioning of the valve member to a set position by operation of a valve handle with the valve member being locked in this position against any creeping movement by reason of flow-induced forces acting on the valve member. The valve also includes a handle design which permits the handle to be positioned on the shaft of the valve member in eight different handle configurations to provide for simplicity of installation and ease of adaptability to push-pull controls.

Abstract: Centrifugal pump including: (a) impeller drive with parallel low speed input and high speed output shafts having integral drive and pinion gears: (b) a combination housing-pumphead configured to maintain concentricity in critical areas and adapt the pump for either a gas engine or an electric motor drive; and (c) a clearance ring assembly which will allow clearance ring and impeller to shift radially to natural positions.