Abstract: A fluid end assembly of a hydraulic fluid pump includes a housing having a first housing bore and a second housing bore offset axially from the first housing bore. A plate is fastened to the housing. The plate has a first plate bore axially aligned with the first housing bore and a second plate bore axially aligned with the second housing bore. A first removable valve cover closes the first housing bore and a second removable valve cover closes the second housing bore. A first retainer engages the first plate bore and abuts the first removable valve cover and a second retainer engages the second plate bore and abuts the second removable valve cover.

Abstract: A stuffing box assembly for a fluid end of a hydraulic fluid pump includes a stuffing box unit having a plunger bore configured to receive a plunger of the hydraulic fluid pump and a plurality of seals. The plunger bore extends from a first axial end of the stuffing box unit to a second axial end of the stuffing box unit. The plunger bore includes a first portion configured to receive the plurality of seals and a second portion extending between the first portion and the second axial end. The stuffing box assembly further includes a sensor coupled to the stuffing box unit and configured to determine a fluid pressure within the second portion of the stuffing box unit.

Abstract: A stuffing box assembly for a fluid end of a hydraulic fluid pump includes a first stuffing box member having a first plunger bore configured to receive a plunger of the hydraulic fluid pump and a plurality of seals. The first stuffing box member further comprises a first bore spaced apart from the plunger bore. A second stuffing box member has a threaded stuffing nut bore configured to receive a stuffing nut of the hydraulic fluid pump. The second stuffing box member further comprises a second bore spaced apart from the stuffing nut bore. A fastener is configured to extend through the first and second bores to secure the first stuffing box member to the second stuffing box member.

Abstract: A fluid end assembly of a hydraulic fluid pump includes a housing having a first housing bore and a second housing bore offset axially from the first housing bore. A plate is fastened to the housing. The plate has a first plate bore axially aligned with the first housing bore and a second plate bore axially aligned with the second housing bore. A first removable valve cover closes the first housing bore and a second removable valve cover closes the second housing bore. A first retainer engages the first plate bore and abuts the first removable valve cover and a second retainer engages the second plate bore and abuts the second removable valve cover.

Abstract: A fluid end assembly of a hydraulic fluid pump includes a housing having a bore, a removable valve cover closing the bore, and a retainer engaging the bore. The retainer includes a set screw bore that extends from a first side of the retainer to a second side of the retainer, opposite the first side. The fluid end assembly further includes a set screw. The set screw is threaded into the set screw bore from the first side of the retainer. The set screw is not removable from the second side of the retainer. The first side of the retainer is positioned adjacent to the valve cover.

Abstract: A fluid end assembly of a hydraulic fluid pump includes a housing having an axial bore, a removable valve cover closing the axial bore, and a retainer engaging the axial bore. The retainer includes a central opening. The fluid end assembly further includes a threaded drive member positioned within the central opening and operable to apply a preload against the retainer.

Abstract: A seal assembly (1) for a piping connection comprising; a first part (2) having at least one projecting rib (18) extending at least partially along an outer circumference thereof, and a second part (3) arranged to be attached to the first part, the second part being provided with at least one recess (16) on an inner surface thereof, which recess (16) is adapted to receive the projecting rib (18) when the first (2) and second (3) parts are connected, and the recess (16) has a larger cross-section area than the cross-section area occupied by the projecting rib (18) within the recess (16), such that when the first (2) and second (3) parts are connected, they are free to move relative to each other in at least one direction.