Replacement decision in brief
Treat a rotary pump retrofit as a system project. A vessel-based pneumatic package usually changes the footprint, piping, venting and controls. Start with an installation survey and define the shutdown window, temporary production plan and acceptance criteria. A pump nameplate is useful, but cannot replace measured duty data or a dimensioned route drawing.
Survey the current installation
Record the existing duty, failure history, operating hours and maintenance access. Collect product data, tank elevations, route dimensions, valve details and receiver conditions. Photograph the installation and prepare a dimensioned sketch. A pump nameplate alone cannot define a complete replacement transfer package.
Compare the installation boundary
A pressure-vessel skid can require a different footprint, air connection, vent arrangement and control interface from a standalone mechanical pump. Confirm lifting access, foundations and the work needed at the receiver. Include any compressor capacity increase and cleaning modifications in the installed cost.
Prepare the shutdown sequence
Agree which work can be completed before the production stop and which requires isolation of the existing line. Define temporary production arrangements, tie-in responsibilities and the conditions for returning to service. Preserve a documented recovery plan if acceptance cannot be completed within the planned window.
Measure whether the upgrade worked
Use the baseline to compare delivered throughput, product quality, utility consumption, maintenance work and leakage-related loss. Assess enough operation to capture the actual production pattern. A retrofit is successful when the new arrangement solves the plant problem at an acceptable whole-life cost, not simply when a different pump principle has been installed.
General engineering guidance. Numerical examples are illustrative; project specifications and acceptance criteria are agreed for the actual duty.