Abstract: A pump including a pump shaft bearing lubrication system having a main lubrication chamber (45) and a pair of auxiliary lubrication chambers (55 and 57), the auxiliary chambers being disposed on opposite sides of said main chamber. Pump shaft bearing assemblies (single or double row) are sandwiched between each auxiliary lubrication chamber and the main chamber (45) so that each bearing assembly (31 and 33) has its inner and outer sides simultaneously lubricated by fluid in the main and corresponding auxiliary chamber respectively. Each auxiliary lubrication chamber (55 and 57) is provided with a pair of fluid passageways (61 and 63) interfacing the auxiliary and main chambers so that the lubricating fluid can be circulated from the main chamber (45) to the auxiliary chambers (55, 57) and then back into the main chamber again, thereby constantly lubricating the bearing assemblies with cool, clean, and effective lubricating fluid.

Abstract: A chemical processing centrifugal pump is provided with a triple cartridge seal arrangement including a single inboard seal and a pair of concentric seals located rearward (i.e. outboard) of the inboard seal, the concentric seals being closest to the pump bearings for stability against vibration purposes. The passageway along the pump shaft between the inboard seal and the radially inwardmost concentric seal is filled with a pressurized barrier inert gas so as to create a gas seal while a barrier chamber defined between the concentric seals is filled with a pressurized barrier liquid. Accordingly, the concentric seals are lubricated by the barrier liquid disposed in the barrier chamber while the inboard seal is lubricated by the fluid being pumped. Optionally, the inboard seal may be lubricated by barrier liquid if such a pressurized liquid is used instead of the inert gas to fill the passageway.

Abstract: A centrifugal environmentally safe pump including a motor driven pump shaft having a fluid pumping impeller affixed thereto. A plurality of annular shaft supporting bearing assemblies are disposed along the shaft adjacent a lubrication chamber, the lubrication chamber housing lubrication fluid (e.g. oil) maintained at a level below rotating portions of the bearing assemblies so as to maintain a low operating temperature within the chamber and adjacent the bearings. A lubricating fluid dispenser having a thin-profile, disc-shaped portion is affixed to the pump shaft within the lubrication chamber for rotation along with the shaft. The width or profile of the disc-shaped portion of the dispenser is small so as to reduce windage adjacent the lubricating fluid level when the shaft and dispenser are rotated at high speeds thereby allowing the level of the lubrication fluid to be maintained substantially constant and below the bearing balls, even when the pump is operated at high speeds.

Abstract: A pump shaft clearance seal construction disposed adjacent a bearing frame (49, 51) for preventing lubricating fluid from migrating away from the bearing frame. The clearance seal construction includes a plurality of grooves (labyrinth or single spiral groove) defined in the exterior periphery of a rotating member disposed immediately adjacent the bearing frame, the rotating member and a corresponding stationary member defining a fluid sealing clearance passageway (63) in which the grooves are disposed. When the pump shaft (7) is rotated, the air flow created in the passageway (63) by the rotating grooves (73) deters the lubricating fluid from migrating away from the bearing frame (49,51).

Abstract: A motor driven environmentally safe pump includes a sealed motor housing (22) sealingly affixed to a sealed pump housing. The pump housing defines a fluid pumping chamber (43) in which is a fluid pumping impeller (46). A triplex rotating seal (31) is disposed rearward of impeller (46) within an annular fluid chamber (87) so as to prevent the fluid being pumped via the impeller (46) from leaking along the shaft (23) toward the motor (21). A piston seal (32) is provided adjacent a second fluid chamber (204), the piston seal also for preventing fluid from leaking into the motor housing and damaging the motor.

Abstract: A seal construction is provided for sealing a rotating pump shaft against passage of a fluid along its central axis. The seal construction includes front and rear sealing flanges mounted coaxially to and rotatable with the pump shaft. A temperature stabilized chamber is provided adjacent each sealing flange including means for recirculating and cooling fluid disposed therein so as to maintain the fluid between adjacent engaging members at a substantially constant temperature thereby maintaining a flatness of the sealing engagement between the sealing flange surfaces and the engaging members.

Abstract: A centrifugal pump system including a pump having a rotating seal disposed therein, the temperature of the seal being substantially maintained at an acceptable level by circulating a temperature stabilizing liquid to and from a chamber arranged immediately adjacent the rotating seal. A cooling or barrier tank is positioned adjacent the pump, the cooling tank for receiving the temperature stabilizing liquid from the chamber, allowing it to cool, and directing it back into the chamber thereby maintaining the temperature of the liquid adjacent the rotating seal at a substantially constant and acceptable level. A blower or fan is positioned adjacent both the pump and the cooling tank so as to simultaneously blow air across both of them in order to maintain the temperatures of the pump motor, the liquid within the cooling tank, and the rotating seal at acceptable levels.

Abstract: A motor driven environmentally safe pump includes a sealed motor housing (22) sealingly affixed to a sealed pump housing. The pump housing defines a fluid pumping chamber (43) in which is a fluid pumping impeller (46). A triplex rotating seal (31) is disposed rearward of impeller (46) within an annular fluid chamber (87) so as to prevent the fluid being pumped via the impeller (46) from leaking along the shaft (23) toward the motor (21). A piston seal (32) is provided adjacent a second fluid chamber (204), the piston seal also for preventing fluid from leaking into the motor housing and damaging the motor.

Abstract: An environmentally leak-proof pump is provided including: an environmentally leak-proof motor housing having located therein a motor for rotatably driving a rotating shaft; a piston seal axially forward of the motor; and an oil misting chamber disposed between the motor and the piston seal, the misting chamber for simultaneously providing lubrication to two coaxially disposed spaced apart bearings. The oil mister (34) includes a dispenser (260) fixed to a rotating shaft (23), the dispenser having a plurality of nozzles formed by bores (262 and 263) on opposing sides of the dispenser body. Each bore communicates with a passageway (264) thus allowing each nozzle to continuously direct a flow of lubricating liquid or mist toward adjacent bearings (35 and 36).

Abstract: A seal construction is provided for sealing a rotating shaft against passage of a fluid along its central axis. The sealed construction includes a sealing flange fixedly mounted on the shaft and rotatable with the shaft. The sealing flange has a forward and rear surface extending radially from the central axis of the rotating shaft, the forward surface of which is exposed to the fluid to be sealed against. There is then provided a stationary sealing mechanism for creating a fluid seal between the rear surface of the rotatable sealing flange and this stationary sealing mechanism. A diaphragm is then provided across a fluid passageway associated with the rear surface of the stationary sealing mechanism in such a way such that any increase in pressure in the fluid to be sealed against upon the diaphragm will cause the diaphragm to flex radially inwardly, thereby increasing the area of the rear surface of the engaging member exposed to the fluid pressure which then further urges a tighter seal.

Abstract: A seal chamber housing is provided for equipment with rotating shafts and includes a stepped conical bore open at the pumping mechanism end. The bore defines a seal chamber affording greater volume about the associated mechanical seals and a tapered bushing is optionally sealingly seated in the large diameter end of the stepped conical bore for excluding pump fluid from the seal chamber and/or preventing loss of seal flush liquid from within the seal chamber. In addition, the seal chamber includes upper and lower vent and drain ports primarily for use when the optional bushing is in place and said chamber also includes flushing fluid ports, a closed temperature-controlling external fluid channel and external air cooling features, all of which coact in various operating environments to provide longer and more efficient mechanical seal life.

Abstract: A split labyrinth seal comprises a stator and a rotor, each comprising a pair of halves. The rotor halves each comprise a hook and a further protrusion extending from the edge on one side of a central aperture and on the other side of the central aperture a recess in the edge for receiving the hook and the further protrusion. The hook and further protrusion and the recess to receive the same, each extend from adjacent the central aperture to the periphery of the half. The rotor halves are identical so that the hooks and protrusions of one half matingly engage the recess of the other half. The stator has a planar mounting wall and a peripheral wall extending axially to house the rotor therewithin. The edge of the stator on one side of the central aperture is recessed on the exterior side of the planar wall and on the other side of the central aperture is recessed on the interior side. The stator halves are identical at their edges, whereby the recessed edges overlap.

Abstract: A seal assembly has a pair of relatively rotatable sub-assemblies adapted to be attached and sealed respectively to relatively fixed and relatively rotatable members to confine the flow of fluid through the space between the members to a restricted passage. One of the sub-assemblies includes one of a pair of relatively rotatable seal rings. Coupling means are operable to selectively couple the other seal ring of the pair to a sub-assembly in a stand-by state in which the seal rings are not in relatively rotated engagement and, alternately, in a working state in which the seal rings are in relatively rotated engagement to seal the restricted passage.

Abstract: A ring seal comprises mating stationary and rotary sealing rings, the rotary sealing ring comprising a first portion of one diameter fitting within a first portion of the stationary ring to be mounted in an opening in a housing and a second portion of a larger diameter fitting within an enlarged portion of the stationary ring. The ring seal further comprises in combination a plurality of elastomeric mounting rings having an inner diameter adapted for mounting on the first portion of the stationary ring and having different predetermined diameters of openings in housings in which the ring seal may be mounted.

Abstract: In a vibration level indicator of the type having a vibration transducer and means for determining the average vibration level, the improvement having a storage element for holding a reference value corresponding to a selected level of the vibrations, and compare and display means responsive to the storage element and the transducer for indicating the relative relationship between the average level and the selected level.

Abstract: A centrifugal pump having a removable seal housing and a tangential flushing tube in the side wall of the seal housing.

Abstract: A centrifugal pump having an adjustable feature enabling precise adjustment of the impeller's location.

Abstract: A centrifugal pump having a packing seal in which rope packing is compressed between two facing seal walls extending radially from the pump shaft, one wall being on a stationary seal gland and the other wall being on a rotary member attached to the shaft.