| Material and feed-state basis | Record the formulation revision, representative sample, predispersion and hold history, solids, coarse-tail, gas or foam observations, rheology method and temperature. | Use the same buyer and laboratory record; list every different material assumption instead of copying an OEM working-range statement. | One approved feed identity, sample chain, method basis, open data gaps and named material-state owner. |
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| Material path and rate identity | State single-pass, multi-pass or recirculation, source and destination, and whether each requested value is fresh feed, loop flow, mill discharge or another declared quantity. | Record the second path independently; do not rename pump or circulation flow as accepted production output. | Approved process drawing, rate definitions, units, operating states, measurement locations and unresolved route differences. |
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| Source vessel and suction boundary | Record source geometry, outlet, working levels, agitation state, suction pipe and components, elevation, temperature, priming or air-removal assumptions and responsibility split. | Use the same site conditions and preserve any different pump-inlet requirement, test basis or excluded component. | Site-supplied inlet conditions and candidate-pump requirements reviewed separately by their responsible parties. |
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| Discharge, mill and return boundary | Map the pump discharge through mill inlet and outlet to the return or downstream destination, including valves, instruments, filters, heat exchangers and component limits. | Map the second proposal to the same flange, pipework and operating states; disclose different exclusions and pressure evidence. | Controlled P&ID or line drawing, component data, pressure-boundary ownership and supplier-reviewed interfaces. |
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| Pump, drive and wetted configuration | Identify pump principle, exact proposed unit, speed and drive basis, direction, wetted materials, elastomers, seal and any flush, cooling or lubrication auxiliary. | Retain the second proposal's own documents; do not infer equivalence from the pump-family name or nominal drive label. | Revised data sheets, configuration drawing, material review, included auxiliaries, exclusions and responsible suppliers. |
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| Measurement and control interface | Record flow, pressure and temperature instrument type, location, range and calibration plus setpoint source, local or remote mode, permissives, status and data logging. | Use the same control questions; show where a pump setting, calculated value and measured product value differ. | Instrument schedule, calibration evidence, I/O boundary, control narrative, cause-and-effect record and software owner. |
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| Protection, abnormal states and cleaning | Ask the responsible suppliers to address low level, blocked path, closed valve, dry or gas-filled condition, pressure excursion, power loss, settled restart, cleaning, draining and recovery. | Record the second supplier-approved protection and cleaning basis without publishing an operating sequence or safety setting. | Reviewed safeguards, fault disposition, complete wetted-path cleaning record, waste boundary and open safety actions. |
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| Acceptance, scope and change control | Define who supplies, sizes, installs, tests and warrants the pump, drive, instruments, controls, protective devices, pipework and mill interface, plus the proposed test conditions. | Apply the same witness, acceptance, deviation, retest and handover questions to the second proposal. | Signed scope matrix, test records, punch list, approved disposition and material, route, component or control changes that reopen review. |
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