A power end includes a monolithic core with a base having a surface configured to mount to a fluid end of the reciprocating pump and a plurality of extensions integral to the base. Each extension of the plurality of extensions includes a ring portion that defines an opening configured to receive a crankshaft of the reciprocating pump. The power end also includes a plurality of plates separate from the monolithic core. Each plate of the plurality of plates extends between a pair of adjacent of extensions of the plurality of extensions to enclose the monolithic core.

A power end includes a monolithic core with a base having a surface configured to mount to a fluid end of the reciprocating pump and a plurality of extensions integral to the base. Each extension of the plurality of extensions includes a ring portion that defines an opening configured to receive a crankshaft of the reciprocating pump. The power end also includes a plurality of plates separate from the monolithic core. Each plate of the plurality of plates extends between a pair of adjacent of extensions of the plurality of extensions to enclose the monolithic core.

An intensifier system comprising at least two intensifiers configured in series, wherein each intensifier in the series is configured to generate a greater pressure in a process medium than the preceding intensifier. A process medium pilot-operated check valve is configured between each intensifier to operate normally as a check valve (e.g., closed) and to operate in a bypass mode when piloted (e.g., open), allowing for both full bypass and enhanced control over a smoother depressurization of the intensifier system without the need for assistance from external devices.