Fanpod® Stainless Steel Jacketed Process Tanks | Engineering Reference – Hygienic Design, Heat Transfer & Thermal Sizing F Fanpod® Process & Mixing Tanks Contents Portfolio FAQ Engineering Consultation Engineering Reference · 2026 Fanpod® Engineering Reference Stainless Steel Jacketed Process Tanks Hygienic Design, Heat Transfer, Mixing & Thermal Sizing for Dairy, Beverage, Pharmaceutical & Chemical Service Explore Full Reference Worked Examples 🛠 High-resolution product photography placeholder Fanpod® PT-Series Jacketed Process Tank — Hygienic 316L Construction 200–50k L Volume Range 316L Standard Material Dimple Preferred Jacket Fanpod® Engineering Reference Stainless Steel Jacketed Process Tanks Hygienic Design, Heat Transfer, Mixing & Thermal Sizing for Dairy, Beverage, Pharmaceutical & Chemical Service *A comprehensive technical and commercial guide for process engineers, project managers and plant designers. Includes full theory, jacket and agitator selection, rigorous heat-transfer calculations, multi-industry applications, process-tank versus reactor boundary definition, and Fanpod® product integration.* § Table of Contents Purpose and Scope Process Tank versus Reactor – Engineering Boundary Construction, Materials and Hygienic Design Jacket Technologies – Detailed Comparison Heat-Transfer Fundamentals in Process Vessels Agitation Effects on Heat Transfer and Mixing Worked Thermal Examples (10-ton Milk + Additional Cases) Cooling Design Considerations Mixing Power, Impeller Selection and Scale-up Industry-Specific Applications and Design Notes Instrumentation, Automation, CIP/SIP and P&ID Integration Design Codes, Testing and Documentation Fanpod® Process Tank Portfolio and Commercial Offering Engineering Design Checklist Frequently Asked Questions Conclusion and Next Steps 1 Purpose and Scope This reference document provides engineers with a complete methodology for specifying, sizing and selecting stainless steel process tanks equipped with heating/cooling jackets and agitators. It covers sanitary and industrial liquid handling duties across dairy, beverage, pharmaceutical, biotech, cosmetics and selected chemical applications. Fanpod® process tanks are engineered vessels for storage, blending, temperature conditioning, intermediate holding and gentle processing. They are manufactured in-house (tank bodies, supports, frames) and integrated with high-performance valves and instrumentation from Alfa Laval, GEA, Eurobinox, Samson and Spirax Sarco. The document deliberately exceeds typical marketing content by delivering usable equations, realistic U-value ranges, full worked examples, heating-time comparisons and clear decision criteria so that it can serve as a permanent engineering reference. 🏭 Fanpod manufacturing & assembly facility — process tank production line In-house fabrication of tank bodies, jackets, supports and frames Fanpod manufactures tanks, filters and PHE frames; valves & instruments supplied from leading European partners. 2 Process Tank versus Reactor – Engineering Boundary Confusion between process tanks and reactors is common and leads to over- or under-specification. The distinction is functional, not merely semantic. Criterion Process Tank (Fanpod® focus) Reactor Primary objective Condition, mix, store or prepare a liquid Drive a chemical or biochemical conversion Heat of reaction Negligible or secondary Dominant design driver (exothermic/endothermic) Operating pressure Atmospheric to ~1–3 bar g Frequently 5–100+ bar Temperature range Typically –10 °C to 150 °C Can exceed 250–300 °C Residence time control Secondary Critical for conversion and selectivity Agitation purpose Homogenization + heat-transfer enhancement Mass transfer, reaction kinetics, gas dispersion Instrumentation depth T, level, basic control Multi-variable (pH, ORP, gas analysis, advanced loops) Design codes emphasis Hygienic (3-A, EHEDG, ASME BPE) + PED ASME VIII Div.1/2, AD 2000, high-pressure + hygienic Jacket duty Product temperature conditioning Reaction heat removal/addition Typical Fanpod use cases Milk standardization, juice blending, buffer prep API synthesis, polymerization, fermentation (special) Practical rule If the vessel’s main purpose remains product integrity, hygiene and controlled temperature/mixing without significant reaction heat or pressure rise, it is a process tank. When reaction kinetics, heat of reaction or elevated pressure dominate the mechanical and process design, the vessel becomes a reactor. Many “reactors” sold for cosmetic or food formulation are, in reality, high-spec process tanks. Fanpod designs both families but applies different mechanical margins, agitator power densities and instrumentation packages according to the true process duty. 3 Construction, Materials and Hygienic Design Product-contact materials AISI 316L (standard for dairy, pharma, acidic beverages, chlorides). AISI 304/304L for mild, non-corrosive duties. Optional alloys (904L, duplex, Hastelloy) for aggressive chemicals. Surface finish Mechanical polish Ra ≤ 0.8 µm (dairy/beverage standard). Electropolish Ra ≤ 0.4 µm or better for pharmaceutical and high-purity applications. Welds fully penetrated, ground flush, inspected (visual + PT). Geometry preferences Vertical cylindrical with torispherical or 15–30° conical bottom for complete drainability. Minimum slope 1–2 % toward outlet. No dead legs; all nozzles designed for drainability and cleanability. Working volumes from 200 L to 50 000 L+ (standard models PT-500 to PT-10000 and fully custom). Supports Adjustable hygienic legs or skirt base with insulation cladding. Optional load cells for gravimetric batching. Agitator entry Top-entry (most common) or bottom-entry magnetic/hermetic drives for aseptic duty. Single or double mechanical seals with steam or sterile barrier fluid. 🔍 Detail: polished weld, dimple jacket cross-section, hygienic nozzle Surface finish Ra ≤ 0.8 µm · Full-penetration TIG welds · Drainable geometry Hygienic construction details — critical for dairy, beverage and pharmaceutical compliance. 4 Jacket Technologies – Detailed Comparison Jacket Type Pressure Capability Service-side Turbulence Fabrication Cost Cleanability (External) Best Applications Typical U Contribution Conventional full jacket Low–moderate Low–moderate Lowest Moderate Simple heating, small vessels Baseline Dimple jacket High High Medium Excellent Dairy, beverage, pharma (most common) Excellent Half-pipe coil Very high Very high Higher Good Thermal oil, high-pressure steam, chemicals Excellent Internal helical coil N/A (internal) High Medium–high CIP critical High heat duty or limited external space Highest product-side Limpet / half-pipe on bottom High High Medium Good Combined shell + bottom heating Very good Selection logic Sanitary food/dairy/pharma → Dimple jacket preferred (lightweight, high turbulence, excellent cleanability). High-pressure heating medium or thermal oil → Half-pipe. Extreme heat duty or viscous products → Combination of dimple + internal coil. Fanpod standard offering on process tanks is full-height dimple jacket with optional bottom coverage and insulation + stainless outer cladding. ⚙️ Comparative illustration: Dimple vs Half-pipe vs Conventional jacket Fanpod standard: full-height dimple jacket with optional bottom coverage 5 Heat-Transfer Fundamentals in Process Vessels Batch heat duty $$Q = m \cdot c_p \cdot \Delta T + Q_{\text{losses}} + Q_{\text{sensible wall}}$$ Instantaneous rate $$q = U \cdot A \cdot \Delta T_{\text{LMTD}}$$ Log-mean temperature difference (counter-current approximation for jacket) $$\Delta T_{\text{LMTD}} = \frac{(T_{h,in}-T_{c,out}) - (T_{h,out}-T_{c,in})}{\ln\left(\frac{T_{h,in}-T_{c,out}}{T_{h,out}-T_{c,in}}\right)}$$ For batch heating with constant utility inlet temperature the driving force decreases as product temperature rises; rigorous design uses the integrated form or stepwise calculation. Overall heat-transfer coefficient $$\frac{1}{U} = \frac{1}{h_i} + \frac{1}{h_o} + R_{\text{wall}} + R_{\text{fouling},i} + R_{\text{fouling},o}$$ Product-side film coefficient \( h_i \) is usually controlling and is strongly improved by agitation. Typical realistic U ranges (hot water or low-pressure steam, stainless steel, clean surfaces) Condition U (W/m²·K) Non-agitated, natural convection 80–200 Mild propeller agitation 250–450 Strong pitched-blade / hydrofoil 400–700 Anchor / scraper (higher viscosity) 200–500 Dimple jacket + good agitation (milk) 350–650 Half-pipe + high velocity 500–900 Fouling factors for dairy: 0.0002–0.0005 m²·K/W; higher for protein-rich or sugary products if local wall temperature is excessive. 6 Agitation Effects on Heat Transfer and Mixing Agitation converts natural convection to forced convection, thins the thermal boundary layer, eliminates stratification and multiplies the product-side film coefficient. Key impeller families for process tanks Marine propeller / hydrofoil – high flow, low shear, excellent for low-viscosity liquids (milk, juice, buffers). Pitched-blade turbine – good balance of flow and shear. Anchor / gate – wall sweeping, preferred for medium-to-high viscosity or when burn-on risk is high. Scraper / helical ribbon – high-viscosity products (creams, concentrates, pastes). Power draw $$P = N_p \cdot \rho \cdot N^3 \cdot D^5$$ Tip speed guidelines: Low-viscosity sanitary liquids: 1.5–3.5 m/s Shear-sensitive products: lower tip speed + larger diameter Always use VFD for process flexibility and soft start. Baffles are normally required for low-viscosity fluids to prevent solid-body rotation; sanitary baffle design must remain fully drainable and CIP-compatible. 🔄 Impeller types: Propeller · PBT · Anchor · Scraper — flow pattern diagrams Agitator selection drives both blend quality and heat-transfer coefficient 7 Worked Thermal Examples Primary Example – Heating 10 000 kg Milk Duty definition Mass \( m = 10\,000 \) kg whole milk \( c_p \approx 3.93 \) kJ/kg·K Initial temperature \( T_1 = 5^\circ \)C Final temperature \( T_2 = 72^\circ \)C (pasteurization pre-heat or standardization) \(\Delta T = 67\) K Process heat duty $$Q_{\text{process}} = 10\,000 \times 3.93 \times 67 = 2\,633\,100\ \text{kJ} \approx 2.633\ \text{GJ}$$ Add 7 % for vessel wall, insulation losses and control margin → design duty ≈ 2.82 GJ. Target heating time: 2.5 h (realistic production window). Average power required: $$q_{\text{avg}} = \frac{2.82 \times 10^6}{2.5 \times 3600} \approx 313\ \text{kW}$$ Utility: Closed hot-water loop, supply 88 °C, return 78 °C (gentle control, low burn-on risk). Geometry estimate for 10 t tank Working volume ≈ 9.8 m³ → gross volume 11.5–12.5 m³ Diameter 2.3 m, straight side ≈ 2.6 m Effective jacket area (shell + partial bottom) ≈ 22–26 m² (Fanpod PT-10000 class with full dimple coverage reaches the upper end). LMTD calculation (approximate mid-batch and end-of-batch average) Using stepwise or average driving force yields effective \(\Delta T_{\text{LMTD}} \approx 28–35\) K depending on control strategy. Required U·A $$U \cdot A = \frac{q}{\Delta T_{\text{LMTD}}}$$ For 313 kW and 32 K → \( U A \approx 9\,780 \) W/K. With A = 24 m² → required average U ≈ 407 W/m²·K → comfortably achieved with dimple jacket + propeller or pitched-blade agitator. Heating-time comparison (same tank, same utility) Configuration Indicative U (W/m²·K) Approx. Heating Time No agitator 100–160 6–9 h Propeller / hydrofoil 350–550 2.0–3.2 h Anchor (wall sweeping) 250–420 2.8–4.5 h Hot-water flow rate (15 K drop): $$\dot{m}_w = \frac{313}{4.18 \times 15} \approx 5.0\ \text{kg/s} \approx 18\ \text{m³/h}$$ Fanpod typically supplies the tank complete with jacket connections sized for this flow and recommends a dedicated hot-water utility skid. Additional Quick Examples Cooling 10 t milk from 72 °C to 4 °C Similar duty magnitude; chilled water or glycol (inlet 1–2 °C). U drops moderately because of higher viscosity at low temperature. Expect 2.5–4 h with good agitation and adequate jacket area. Pharma buffer preparation (2 000 L) Heat from 20 °C to 80 °C then cool to 25 °C. Smaller absolute duty but tighter temperature uniformity and full SIP capability required. Electropolished 316L + magnetic agitator preferred. Beverage sugar syrup (5 000 L, higher viscosity) Anchor or scraper agitator + dimple jacket; careful wall-temperature limit to avoid caramelization. 📊 Thermal duty schematic — 10 000 kg milk heating curve with agitation effect Dimple jacket + propeller achieves ~2–3.5 h heating vs 6–9 h without agitation 8 Cooling Design Considerations Cooling follows the same equations but with reversed driving force and often lower U-values. Key points: Glycol systems require corrosion-compatible materials and higher flow velocities. Condensate or chilled-water return temperature must be managed to avoid freezing risk. For rapid cooling, combination of jacket + internal coil or external plate heat exchanger loop is sometimes used. Fanpod process tanks are routinely supplied with dual-circuit jackets (heating + cooling) or change-over valves. 9 Mixing Power, Impeller Selection and Scale-up Power number \( N_p \) is obtained from manufacturer curves or literature for the chosen impeller Reynolds number regime. Scale-up rules commonly used: Constant tip speed Constant power per unit volume Constant Reynolds number (rare for large tanks) For heat-transfer-dominated duties, maintain similar wall shear and bulk circulation rather than pure geometric similarity. Fanpod engineering performs both process and mechanical design of the agitator system. 10 Industry-Specific Applications and Design Notes Dairy Milk reception, cream aging, yogurt base, flavoured milk, CIP detergent tanks. Strict 3-A / EHEDG compliance, Ra ≤ 0.8 µm, full drainability, gentle agitation. Beverage Juice blending, sugar syrup, soft-drink premix, hot-fill buffer tanks. Often higher sugar content → higher viscosity and fouling tendency. Pharmaceutical / Biotech Buffer and media preparation, WFI storage (special finishes), formulation vessels. ASME BPE, electropolish, full documentation package, SIP capability. Chemical / Fine Chemical / Cosmetics Solvent blending, dilution, resin premix, lotion/cream bases. May require higher pressure rating, special alloys or explosion-proof electrics. Still classified as process tanks when reaction heat is minor. 🥛 Application gallery: Dairy · Beverage · Pharma · Cosmetics process tanks Multi-industry hygienic process vessels — Fanpod engineered solutions 11 Instrumentation, Automation, CIP/SIP and P&ID Integration Standard package: PT100 temperature sensors (product + jacket) Level probe or load cells Hygienic pressure transmitter if pressurized Spray balls or rotary jet heads for CIP Optional SIP steam valves and sterile barriers Fanpod integrates tanks into complete skids with: Alfa Laval / GEA sanitary valves Samson / Spirax control valves PLC/HMI recipes for automated heating, cooling, mixing and cleaning sequences. P&ID typically shows tank, agitator, jacket supply/return with control valves, utility skid interface, CIP supply/return and product inlet/outlet with sample valves. 📋 Typical P&ID fragment — jacketed process tank with agitation, CIP and utility interface Full skid integration: valves · instruments · automation · utility connections 12 Design Codes, Testing and Documentation Hygienic: 3-A, EHEDG, ASME BPE Pressure: PED 2014/68/EU, ASME VIII if required Materials: EN 10204 3.1 / 3.2 MTCs Testing: Hydrostatic, leak, PT on welds, surface roughness measurement, passivation Documentation: GA drawings, calculations, WPS/PQR, QC dossier, IQ/OQ support for pharma 13 Fanpod® Process Tank Portfolio and Commercial Offering Model Volume Jacket Options Material Agitator Options Typical Service PT-500 500 L Heating / Cooling / Dual 316L Propeller / Anchor Pilot, small batch PT-2000 2 000 L Dimple dual circuit 316L Top-entry hygienic Dairy / beverage PT-5000 5 000 L Dimple or half-pipe 316L Variable speed Production PT-10000 10 000 L Full dimple + bottom 316L Heavy-duty + VFD Large dairy / juice Custom up to 50 m³ Any combination 316L / special Magnetic / bottom entry Pharma / chemical Standard scope Tank body + jacket + insulation + cladding + agitator + legs/skirt + sanitary manway + spray devices + basic instrumentation nozzles. Options Load cells, full valve matrix, hot-water or glycol utility skid, complete automation, electropolish, vacuum rating, ATEX execution. Fanpod manufactures the tanks, filters and PHE frames and supplies/distributes the valve and instrument package, providing single-source responsibility. 📐 PT-500 · PT-2000 · PT-5000 · PT-10000 product family lineup Fanpod® PT Series — from pilot scale to 50 m³ custom process vessels 14 Engineering Design Checklist Define product (density, \( c_p \), viscosity vs temperature, fouling, shear sensitivity, hygiene class). Fix batch size, temperature–time profile, available utilities. Calculate heat/cool duty and select jacket type + area. Select agitator for simultaneous mixing quality and heat-transfer enhancement. Confirm geometry for drainability and CIP coverage. Specify surface finish, material certificates and testing. Integrate sensors, control valves and automation. Verify utility flow rates, pressure drops and energy consumption. Produce GA, P&ID, calculation package and documentation. Plan factory acceptance and site commissioning. 15 Frequently Asked Questions Is a process tank the same as a reactor? No. See Section 2 for the detailed boundary. Why does agitation reduce heating time so dramatically? It multiplies the product-side film coefficient by replacing natural convection with forced convection and eliminates stratification. Hot water or direct steam jacket? Hot-water closed loop is preferred for sanitary and temperature-sensitive products (smoother control, lower burn-on risk). Direct steam is used when very high heat flux is required and product can tolerate it. What U-value should I use for preliminary sizing of a milk tank? 350–550 W/m²·K with good dimple jacket and propeller agitation is realistic for concept work; always confirm with detailed design. Can the same tank heat and cool? Yes – dual-circuit dimple jackets or automated change-over valves are standard Fanpod options. What is the most common sizing mistake? Using an optimistic U-value that ignores actual mixing quality, fouling and utility approach temperatures. 16 Conclusion and Next Steps Stainless steel jacketed process tanks are precision thermal and mixing systems, not simple storage vessels. Correct differentiation from reactors, rigorous application of heat-transfer theory, realistic U-values, proper agitator selection and hygienic design determine both product quality and production efficiency. The 10-ton milk example demonstrates that a well-designed Fanpod® PT-10000 class tank with dimple jacket and appropriate agitation can achieve the required temperature rise in approximately 2–3.5 hours under practical utility conditions — several times faster than a non-agitated vessel of identical size. Fanpod Engineering designs and manufactures these tanks as complete process solutions, integrating them with valves, heat-transfer skids and automation for dairy, beverage, pharmaceutical and chemical plants. Request a project-specific thermal and mechanical design package Provide product data, batch size, temperature profile and utility temperatures for a detailed calculation, GA drawing and quotation. Fanpod® – Engineered Hygienic Process Equipment Process Tanks | Jacketed Mixing Vessels | Filters | PHE Frames | Valve Systems | Turnkey Skids Ready for a Project-Specific Design? Share your product data, batch size, temperature profile and utility conditions. Fanpod Engineering returns detailed thermal calculations, GA drawings and a firm quotation. Book Engineering Consultation View PT Portfolio *This article is intended as a permanent engineering reference. All numerical examples are indicative; final designs must be verified with actual product properties, site utilities and applicable codes. Calculations and recommendations reflect current Fanpod design practice (2026).*