CASE-059 · Engineering case

Line 2 Pasteurizer and Hot Water Set Rebuild

Diagnosed and scoped a Line 2 pasteurizer rebuild to restore thermal control, divert logic, safety interlocks, and regulatory readiness.

Conceptual engineering visualization: Line 2 Pasteurizer and Hot Water Set Rebuild
Conceptual engineering visualization · AI generated

Why the Work Mattered

Purpose and Operating Need

The system failure involved control logic, valve condition, dwell time, temperature recording, divert logic, manual-switch behavior, and hot-water set performance, not a simple heat-exchanger issue.

Engineering Approach

Engineering Approach

Diagnosed failed pasteurizer logic/hardware; missing or inoperative divert, steam, and flow control valves; loss of loop temperature control; overheating/seal-damage risk; underprocessed-product risk; manual-switch hazards; scoped FDV01 divert valve, FCV01/02 temperature valves, flowmeter, RTDs, VFD-controlled pumps, chart recorder validation, high-temp cutout, auto shutdown, PLC/HMI coordination, hot-water set redesign, kosher CIP compatibility, 210 F / 3-hour CIP hold, product recovery/air-blow future path, filler return strategy, and chart recorder calibration/restoration.

Outcome & Engineering Context

Outcome and Context

Defined the pasteurizer rebuild, safety interlocks, thermal-control changes and compliance-readiness requirements.

Workstream Results & Impact

Workstream Portfolio Rollup

28,095,000 USD

Production and Packaging Modernization

Recorded workstream portfolio reference. This is the workstream-level value and is not a project expenditure or a new total of reassigned projects.

Measures & Operating Detail

MeasureValueType & meaningAttribution & operating context
Existing Hold-Tube Length80 ftBaseline
Existing configuration

Applies to: Line 2 Pasteurizer and Hot Water Set Rebuild

80 ft existing hold tube

Pasteurizer Design Flow115 GPMDesign Parameter
Design demand

Applies to: Line 2 Pasteurizer and Hot Water Set Rebuild

115 GPM design rate

Required Hold-Tube Length171 ftDesign Parameter
Calculated design requirement

Applies to: Line 2 Pasteurizer and Hot Water Set Rebuild

115 GPM design — 171 ft required length

Existing Hold-Tube Sufficiency Flow54 GPMScenario or Model Result
Calculated capacity limit

Applies to: Line 2 Pasteurizer and Hot Water Set Rebuild

Existing 80 ft hold tube — 54 GPM sufficiency basis

Engineering scope and design basis

Defined rebuild controls intended to address food-safety, overheating, seal-damage, and underprocessed-product risks and improve kosher CIP and startup control.

Diagnosed failed pasteurizer logic/hardware; missing or inoperative divert, steam, and flow control valves; loss of loop temperature control; overheating/seal-damage risk; underprocessed-product risk; manual-switch hazards; scoped FDV01 divert valve, FCV01/02 temperature valves, flowmeter, RTDs, VFD-controlled pumps, chart recorder validation, high-temp cutout, auto shutdown, PLC/HMI coordination, hot-water set redesign, kosher CIP compatibility, 210 F / 3hrCIP hold, product recovery/air-blow future path, filler return strategy, and chart recorder calibration/restoration.

Missing or inoperative divert valve.

Missing or inoperative steam valves.

Missing or inoperative flow-control valves.

Overheating and seal-damage risk.

Risk of underprocessed product.

Hazards from manual switching.

Improvedpasteurizerrebuild readiness, measured by identifying an 80 ft hold tube limitation against 115 GPM design demand and confirming a 171 ft required length, by auditing thermal control, divert valves, hold-time compliance, instrumentation, and HMI/PLC safety logic.

80 ft existing hold tube; 115 GPM design rate; 171 ft required length; 54 GPM sufficiency basis; exit temperatures varied from 50 F to 250 F under manual-switch behavior; hold-tube-in chart pen functional.

Actions, Methods & Controls

ACTIVITIES IN CONTEXT

Additional Technical Detail

Roles & contributions
  • Project Ownership

    Full lifecycle project ownership

    Owned the full project lifecycle: capital planning and prioritization, need definition, feasibility and scope development, engineering and AFE justification, procurement and vendor coordination, construction sequencing and field oversight, commissioning, turnover, and post-startup support. Connected operating requirements with technical scope, funding decisions, execution readiness, and the needs of operations and maintenance.

Workstream context
Additional technical detail
Explore 12 detail records
  • Diagnostic finding

    Missing or inoperative divert, steam, and flow control valves

  • Diagnostic finding

    Loss of loop temperature control

  • Diagnostic risk

    Overheating/seal-damage risk

  • Diagnostic risk

    Underprocessed-product risk

  • Diagnostic risk

    Manual-switch hazards

  • Diagnostic finding

    Loss of loop-temperature control.

  • Sanitary and aseptic: Existing controls and valves assessment

    Slide 1: Divert to fill tank; FDV01 described as inoperable and forced open.

  • Sanitary and aseptic: Existing controls and valves assessment

    Slide 2: Control Panel Cleanup; Controls Prior to Cleanup; Post Cleanup Return to OEM. This is the deck's only explicit completed-state claim.

  • Sanitary and aseptic: Existing controls and valves assessment

    Slide 3: Missing Controls ?; High Temp Cutout; Hot Water Set I/P Shut off; Product Temp I/P (3-9 & 9-15) PSI; Hot Water Set I/P 3-9 PSI.

  • Sanitary and aseptic: Existing controls and valves assessment

    Slide 4: PRV leaking and does not hold pressure; two modulating valves are 2 inches and the slide says they should be 1 inch and 3/4 inch; both fail to hold seal and require rebuild; one has significant mechanical failure; both use the same Hot Water Set I/P 9-15 PSI control solenoid.

  • Sanitary and aseptic: Existing controls and valves assessment

    Slide 5: product-temperature valve FCV02 broken, 3-9 PSI; FCV01 missing, 9-15 PSI.

  • Sanitary and aseptic: Existing controls and valves assessment

    Slide 6: Hold Tube In stated as the only working recorder pen and the value recorded for quality control; suitability is questioned; hot-water setpoint stated as 250 F; recorder photograph shows 115, 159, 161, and 159; lower controllers show 1163/1000 and 1597/1600 without legible decimal placement; visible labels identify Channel 1 red pen product out, Channel 3 blue pen hold tube in, and Channel 4 apparently black pen hold tube out; Channel 2 begins green pen hot water but its final document files is blurred.

All portfolio connections
Project ownership and delivery context

Owned the full project lifecycle: capital planning and prioritization, need definition, feasibility and scope development, engineering and AFE justification, procurement and vendor coordination, construction sequencing and field oversight, commissioning, turnover, and post-startup support. Connected operating requirements with technical scope, funding decisions, execution readiness, and the needs of operations and maintenance.

Reviewed hold-tube length, process flow and thermal-control requirements, translated those requirements into the upgrade scope, and coordinated production, quality and utility interfaces. The delivery approach connected the design basis with controls verification and operating readiness.

Related analysis and application artifacts
Connected collections

WHAT COMES NEXT

Complex Challenge?
Let’s Work Through It.

Engineering leadership, capital projects, and independent consulting.

Start a conversation ↗