Abstract: A retainer nut assembly for a fluid end of a pump system includes a plug with two blades separated by edge cuts, a plug exterior face and a threaded rod extending from the plug exterior face. Each of the blades includes an arcuate face. A mid-cap includes a hole for receiving the threaded rod therethrough with the mid-cap positioned adjacent the plug. The mid-cap further includes flange segments. A cover cap includes a hole for receiving the threaded rod therethrough with the cover cap positioned adjacent the mid-cap. The cover cap has extensions separated by cut outs. Each of the extensions are configured to extend axially between respective flange segments of the mid-cap when the cover cap is assembled to the mid-cap. A fastener engages the threaded rod and secures the retainer nut assembly together.

Abstract: A retainer assembly and plug for a fluid end of a pump system includes a retainer body. A plurality of tongues are movably arranged about the retainer body. The tongues are moveable between a pre-installed configuration and an installed configuration depending on the position of the retainer body relative to the tongues. In the installed configuration engaging flanges of the tongues are positioned in a retaining channel formed in a bore of the fluid end and retain the retainer assembly to the fluid end. A plug is configured to sealingly fit to the bore of the fluid end inboard of the retainer assembly and a locking mechanism is configured to secure the retainer assembly to the plug, and when so secured, the position of the retainer body is maintained relative to the plurality of tongues and the retainer assembly is maintained in the installed configuration.

Abstract: A retainer assembly and plug for a fluid end of a pump system includes a retainer body. A plurality of tongues are movably arranged about the retainer body. The tongues are moveable between a pre-installed configuration and an installed configuration depending on the position of the retainer body relative to the tongues. In the installed configuration engaging flanges of the tongues are positioned in a retaining channel formed in a bore of the fluid end and retain the retainer assembly to the fluid end. A plug is configured to sealingly fit to the bore of the fluid end inboard of the retainer assembly and a locking mechanism is configured to secure the retainer assembly to the plug, and when so secured, the position of the retainer body is maintained relative to the plurality of tongues and the retainer assembly is maintained in the installed configuration.

Abstract: A retainer nut assembly for a fluid end of a pump system includes a plug with two blades separated by edge cuts, a plug exterior face and a threaded rod extending from the plug exterior face. Each of the blades includes an arcuate face. A mid-cap includes a hole for receiving the threaded rod therethrough with the mid-cap positioned adjacent the plug. The mid-cap further includes flange segments. A cover cap includes a hole for receiving the threaded rod therethrough with the cover cap positioned adjacent the mid-cap. The cover cap has extensions separated by cut outs. Each of the extensions are configured to extend axially between respective flange segments of the mid-cap when the cover cap is assembled to the mid-cap. A fastener engages the threaded rod and secures the retainer nut assembly together.