Fanpod Hygienic Process Engineering CIP Systems for Dairy Processing Hygienic, repeatable and automated Cleaning-in-Place solutions for dairy, beverage and food processing plants. Fanpod designs CIP systems with a strong focus on cleanability, automation, chemical control, water recovery and reliable cleaning performance. Request Technical Consultation Explore Fanpod Products What is CIP? 4 Factors CIP Types Heating Flow Calculation Spray Devices Automation Sequence Fanpod Approach Cleaning-in-Place Definition What Is CIP? Cleaning-in-Place, or CIP, is the cleaning of complete process equipment or circuits without dismantling or opening the equipment, and with little or no manual involvement by the operator. The process is performed by spraying, jetting or circulating cleaning solutions through the plant under conditions of increased turbulence and flow velocity. No dismantling Low manual involvement Spraying or circulation Controlled turbulence Repeatable cleaning Note: This definition and the reference to increased turbulence and flow velocity are proven standard in almost all of refrences.. Dairy Hygiene Why CIP Matters in Dairy In dairy processing, cleaning quality is not a side issue. It is part of product quality, plant uptime, food safety and process consistency. Dairy plants handle products such as milk, cream, yogurt base, whey, mix products and fat-containing streams that can leave behind protein deposits, fat films, mineral scaling and microbiological risk. These soils cannot be managed reliably with casual cleaning or operator judgment alone. CIP replaces inconsistent manual washing with a controlled, validated and repeatable cleaning process. 01 Hygienic Reliability A well-designed CIP system protects tanks, pasteurizers, PHEs, pipelines, valves and process loops against contamination and soil accumulation. 02 Repeatable Operation Instead of depending on manual timing or operator judgment, CIP uses programmed sequences, measured values and controlled setpoints. 03 Lower Utility Waste With the right reuse concept, CIP can reduce fresh water consumption, chemical waste, heating demand and total operating cost. CIP Design Fundamentals The 4 Critical Cleaning Factors in CIP Effective CIP depends on the correct balance of chemical action, mechanical action, temperature and time. If one factor becomes weaker, the others may need to compensate, but in hygienic production this trade-off must be controlled carefully. 1 Chemical Action Chemical action includes the selection and concentration of cleaning chemicals such as NaOH / caustic soda, HNO3 / nitric acid and approved disinfecting agents. NaOH for organic soils, fat and protein residues HNO3 for mineral deposits and milkstone Concentration depends on product, soil and plant standard 2 Mechanical Action Mechanical cleaning energy is created by line velocity, turbulence, pump performance, spray device selection and complete wetting of surfaces. Pipeline velocity must be checked carefully Practical target: above about 1.5 m/s in many circuits Spray heads must match tank geometry and soil load 3 Temperature Temperature affects detergent performance, fat removal and total cleaning efficiency. In many dairy CIP applications, warm or hot cleaning is used. Typical practical setpoints may be around 60–70°C Setpoint depends on chemistry and product type Temperature must be maintained during the active step 4 Time Even with correct chemistry and temperature, the cleaning step must be held for enough time to complete the cleaning mechanism. Shortened time creates inconsistent cleaning Automation prevents rushed cycles Validated time must be respected for each sequence System Architecture Types of CIP Systems by Number of Tanks The number of tanks in a CIP system depends on the cleaning philosophy, the number of chemicals used and whether water or chemicals are reused. The source material confirms that tank count is related to the substances used and the reuse concept. 1T 1-Tank CIP System A 1-tank CIP system is the simplest configuration. It may be used as a compact skid, a small process plant solution or even a portable CIP unit. Suitable for small production Useful for simple circuits Limited recovery and reuse capability Can be designed as a portable unit 2T 2-Tank CIP System A 2-tank system is used when the plant needs better separation between detergent, water or recovery functions. Better process control than a single-tank design Useful for compact industrial applications Supports more efficient operation Can be adapted to plant cleaning philosophy 3T 3-Tank CIP System A 3-tank CIP arrangement is a very practical industrial configuration for dairy plants. Water tank Caustic / soda tank Acid tank Good separation of cleaning media 4T 4-Tank CIP System with Returned Water A 4-tank CIP system commonly includes a returned water or recovery water tank. This fourth tank is extremely valuable in real dairy plants. Water tank Caustic / soda tank Acid tank Returned water / recovery water tank Reuse concept: The rinse water collected after alkaline or acid phases can be reused as the first rinse of the next CIP cycle. This reduces fresh water consumption and improves utility efficiency while preserving a practical cleaning sequence. Configuration Typical Tanks Best For Main Advantage 1-Tank CIP One preparation / circulation tank Small lines, portable CIP, simple circuits Simple, compact and economical 2-Tank CIP Detergent plus water or recovery function Compact industrial applications Better separation and improved control 3-Tank CIP Water, caustic, acid Dairy and food plants with regular cleaning demand Good media separation and cleaning flexibility 4-Tank CIP Water, caustic, acid, returned water Plants focused on water and utility savings Reuse of rinse water for first rinse of next cycle Note: storage tanks are used to store raw material, reused solutions or residual solutions, and that the number of tanks depends largely on the number of substances used and chemical reuse. . Thermal Design CIP Heating Methods CIP systems require controlled heating of water and chemical solutions. The correct heating method depends on plant duty, hygiene requirement, temperature range, pressure conditions and maintenance philosophy. PHE Plate Heat Exchanger A plate heat exchanger is often selected when fast heat transfer, compact skid design and efficient heating are important. High heat transfer efficiency Compact footprint Fast response Requires correct plate and gasket compatibility TUB Tubular Heat Exchanger A tubular solution may be preferred when mechanical robustness, durability or project standards require a more robust heat transfer arrangement. Robust design Good mechanical durability Suitable for demanding conditions Usually larger than compact plate systems BHE Brazed Heat Exchanger A brazed heat exchanger may be used in some utility or compact heating applications, but compatibility must be checked carefully. Compact and efficient Economical in some duties Chemical compatibility must be verified Maintainability must be evaluated case by case Engineering selection: The right heating solution depends on the cleaning media, target temperature, available steam or hot water utility, required hygienic standard, maintenance access and total plant philosophy. Hydraulic Design Flow and Velocity Calculation in CIP One of the most common mistakes in CIP design is selecting a pump only by rough capacity without checking line velocity, pressure loss, spray demand and circuit resistance. For pipelines and process equipment loops, the CIP flowrate must be high enough to maintain turbulent cleaning conditions. In practical hygienic design, line velocity above about 1.5 m/s is often treated as a minimum target for effective cleaning in many circuits. The required pump flow must be calculated from the largest or most demanding circuit section, while also considering friction losses, elevation changes, valve losses, heat exchanger pressure drop, spray device demand and return-line behavior. Basic Flow Relationship The basic flow equation for pipe cleaning is: Q = A × v Where: Q = volumetric flowrate A = internal cross-sectional area of the pipe v = fluid velocity Since pipe area is: A = π × D² / 4 The CIP flowrate can be calculated as: Q = (π × D² / 4) × v Where D is the internal pipe diameter and v is the design CIP velocity. CIP of Pipes and Process Loops For pipeline CIP, the flow must be sufficient to create turbulent cleaning conditions. The inlet pipe velocity should normally be checked against the selected target velocity, commonly above about 1.5 m/s in many hygienic circuits. Check internal pipe diameter, not only nominal size Calculate required flow for the largest circuit Include valves, elbows, PHEs and static mixers in pressure-loss review Confirm that the return line can handle the required flow CIP of Tanks and Vessels Tank cleaning is different from line cleaning. A tank cannot be designed correctly only by pipe velocity. The spray device must be selected to guarantee full surface coverage and sufficient impact or falling-film cleaning. Tank diameter and height are critical Spray pressure and spray flow must match the cleaning head Soil type determines required mechanical action Large tanks may require rotary spray or rotary jet devices Note: For the essential elements of Clean-in-Place (CIP), key considerations include: Temperature Volumetric flow rate Streamline and turbulent flow Frictional loss in straight pipes Pump characteristics Tank cleaning heads Falling films Tank Cleaning Devices Spray Devices and Cleaning Heads The correct tank cleaning device depends on tank geometry, soil type, available flow and pressure, cycle time and expected hygiene level. SB Static Spray Ball Static spray balls are suitable for light-duty cleaning, low-viscosity residues, simpler tanks and applications where high-impact cleaning is not required. Simple construction Low maintenance Lower cost Limited impingement energy RH Rotary Spray Head Rotary spray heads provide better distribution and surface wetting than static spray balls in many hygienic tanks. Better coverage Improved wetting pattern Good for moderate soil conditions More efficient than static devices in many cases RJ Rotary Jet Head Rotary jet heads are used for demanding cleaning duties, larger tanks, difficult residues and applications requiring higher mechanical action. Higher impact Stronger mechanical action Useful for difficult cleaning tasks Can reduce cleaning time in selected applications Important: A large dairy tank cannot be cleaned properly by selecting a spray ball only by habit. Tank diameter, tank height, internal obstructions, nozzle position, required pressure and actual soil must all be considered. PLC / HMI / Interlocks Instruments and Automation A modern CIP system should not rely on operator judgment alone. It should be built around measurement, interlocks and repeatability. Full automation is essential when the plant requires consistent hygiene, reliable sequence control, chemical recovery, traceability and protection against rushed or incomplete cleaning. Why manual operation is risky: Operators under production pressure may shorten rinse time, reduce circulation time, accept a lower temperature, skip recovery logic or finish the cycle before true completion. A fully automatic system prevents this by checking the required conditions during each step. Level Switches Tank availability and protection Level Transmitters Continuous tank volume monitoring Flow Meter Verification of required CIP flow Temperature Transmitter Control of cleaning setpoint Return-Line Flow Switch Confirms return circulation Conductivity Meter Critical for chemical detection and routing Pressure Indication Pump and circuit monitoring Valve Feedbacks Position confirmation and interlocking PLC / HMI Panel Program control, alarms and operator interface Why Conductivity Is Critical Among all instruments, the conductivity meter is one of the most important in practical CIP service. It helps determine whether the circuit contains water or detergent, when rinsing is complete, when chemical return should be recovered or diverted and how concentration control is managed in automated systems. Preferred Instrument Brands For high-quality hygienic instrumentation, many plants prefer established industrial brands such as Endress+Hauser, Siemens, IFM, WIKA and other approved equivalents depending on project standards. Final brand selection should match the project specification, hygienic connection type, accuracy requirement and plant automation philosophy. Automation logic example: If the acid phase requires a specific temperature and the temperature falls below setpoint during circulation, the system can be programmed to hold, alarm, extend the step or repeat the stage until the required cleaning condition is achieved. Note: A standard CIP system must verify the presence of cleaning programs, a control panel, an operator panel, a menu tree, and alarm systems. Additionally, it identifies the preparation and emptying procedures for lye, acid, and rinse water tanks.. Cleaning Program Standard CIP Sequence A typical CIP program follows a controlled sequence of product recovery, rinsing, detergent circulation, intermediate rinsing, optional second detergent phase, disinfection and final rinse. Removal of Gross Debris / Product Recovery Remaining product is recovered or pushed out of the circuit before the main cleaning sequence begins. This reduces soil load and chemical consumption. Pre-Rinse Water is circulated to remove loose residues and prepare the surfaces for detergent action. Detergent Circulation Caustic or another suitable detergent is circulated under defined conditions of concentration, temperature, flow and time. Intermediate Rinse Water is used to remove detergent residues before the next chemical phase or before final sanitation steps. Second Detergent Circulation, Optional An acid detergent phase may be used to remove mineral deposits, milkstone or process-specific scaling. Second Intermediate Rinse A second rinse removes remaining acid or detergent before disinfection or final rinse. Disinfection A disinfection or sterilization-related step may be applied depending on the process requirement, product risk and plant sanitation regime. Final Rinse The final rinse completes the sequence where required by the sanitation procedure and chemical regime. Note: The CIP sequence involves the following steps Removal of gross debris, Pre-rinse, Detergent , circulation, Intermediate rinse, Optional second, detergent circulation, Second intermediate rinse, Disinfection and Final rinse. Controlled Cleaning Why Full Automation Matters This is one of the most important real-world points in CIP design. A manually operated CIP system may look cheaper at first, but in practice it often depends too heavily on the operator. When operators are under production pressure, they may shorten rinse time, lower temperature unintentionally, cut chemical circulation time, skip recovery logic or finish the cycle before true completion. Automatic Sequence Protection A fully automatic CIP system continuously checks defined conditions for each step, including temperature, time, flow, conductivity and tank availability. If flow is too low, the system can alarm or hold the step. If temperature drops below setpoint, the active step can be extended or repeated. If conductivity is not correct, routing can be blocked or diverted. If valve feedback is wrong, the sequence can stop safely. The difference: Full automation is the difference between nominal cleaning and controlled cleaning. It protects the hygiene result by forcing the system to respect the required time, temperature, concentration and mechanical action. Dairy Applications Applications of Fanpod CIP Systems Fanpod CIP systems can be engineered for a wide range of dairy and hygienic process applications, from small process loops to multi-circuit automated cleaning systems. Milk Reception and Storage Cleaning of milk reception lines, storage tanks, transfer pumps, valves and associated process circuits. Pasteurizer Circuits CIP integration for pasteurizers, balance tanks, holding tubes, regeneration sections and hygienic valve arrangements. Plate Heat Exchangers Cleaning of PHE circuits where correct velocity, temperature, chemical concentration and pressure-drop management are critical. Cream and Fat Processing Cleaning systems for cream lines, fat-containing streams and circuits where detergent performance and temperature control are important. Yogurt and Fermented Products CIP for yogurt process sections, mix tanks, fermentation-related transfer lines and hygienic processing equipment. Cheese and Butter Lines Cleaning support for cheese milk preparation, butter processing, whey handling and fat-rich process areas. Fanpod Engineering Approach A CIP System Must Match the Real Plant Fanpod approaches CIP not as a generic wash skid, but as a process-engineered hygienic system integrated with the real plant. The system must match the plant not only in capacity, but also in soil type, cleaning philosophy, recoverability, automation level and hygienic risk profile. Fanpod Scope Can Include CIP philosophy development Single-use or reuse CIP concept selection 1-tank, 2-tank, 3-tank and 4-tank skid design Water, caustic, acid and recovery tank arrangement Pump sizing based on flow, velocity and pressure-drop logic Heater selection: plate, tubular or other suitable arrangement Spray device selection for tanks and vessels Hygienic valve and instrument integration Conductivity-based return logic PLC/HMI automation philosophy Utility and energy optimization Integration with pasteurizers, process tanks, PHE circuits and dairy lines Documentation and project execution support DES Design Fanpod reviews the cleaning circuits, tank sizes, pipe diameters, spray requirements, recovery logic and utilities before defining the final CIP architecture. CTL Control PLC/HMI logic can be developed around validated sequences, operator access, alarms, conductivity, temperature and flow confirmation. INT Integration CIP systems can be integrated with dairy tanks, pasteurizers, PHEs, process manifolds, transfer lines and hygienic valve clusters. Need a CIP System for Your Dairy Plant? Fanpod can help you design the right solution for your process, from simple portable CIP units to fully automated multi-tank recovery systems integrated with tanks, pasteurizers, heat exchangers and hygienic process lines. Contact Fanpod View Process Equipment Conclusion A good CIP system is not just a pump with chemicals. It is a controlled hygienic process built on correct chemistry, correct temperature, correct flow and turbulence, correct time, correct instrumentation and correct automation logic. In dairy processing, this directly affects hygiene, uptime, water consumption, chemical cost and product safety. Fanpod develops CIP solutions with practical engineering judgment, process understanding and hygienic design discipline. Source Notes CIP definition, no dismantling, little or no manual involvement, increased turbulence and flow velocity: CIP CALCULATION-DESIGN-Reuse_Concept_-_Vital_Segments_in_a_Clean_in_P_3.pdf, page 13. CIP core equipment including tanks, heat exchangers, pumps, control system and measuring instruments: CIP CALCULATION-DESIGN-Reuse_Concept_-_Vital_Segments_in_a_Clean_in_P_3.pdf, page 13. Reuse concept and relation between number of tanks, substances used and chemical reuse: CIP CALCULATION-DESIGN-Reuse_Concept_-_Vital_Segments_in_a_Clean_in_P_3.pdf, page 13. Standard cleaning sequence: Cleaning-in-Place_Dairy__Food_and_Beverage_Operations.pdf, page 6. Temperature, volumetric flowrate, turbulent flow, frictional loss, pump characteristics and tank cleaning heads: Cleaning-in-Place_Dairy__Food_and_Beverage_Operations.pdf, page 7. Tetra Alcip 30 program and tank-handling support: 42506-01_Tetra Alcip™ 30.PDF, page 23.
01 Hygienic Reliability A well-designed CIP system protects tanks, pasteurizers, PHEs, pipelines, valves and process loops against contamination and soil accumulation.
02 Repeatable Operation Instead of depending on manual timing or operator judgment, CIP uses programmed sequences, measured values and controlled setpoints.
03 Lower Utility Waste With the right reuse concept, CIP can reduce fresh water consumption, chemical waste, heating demand and total operating cost.
1 Chemical Action Chemical action includes the selection and concentration of cleaning chemicals such as NaOH / caustic soda, HNO3 / nitric acid and approved disinfecting agents. NaOH for organic soils, fat and protein residues HNO3 for mineral deposits and milkstone Concentration depends on product, soil and plant standard
2 Mechanical Action Mechanical cleaning energy is created by line velocity, turbulence, pump performance, spray device selection and complete wetting of surfaces. Pipeline velocity must be checked carefully Practical target: above about 1.5 m/s in many circuits Spray heads must match tank geometry and soil load
3 Temperature Temperature affects detergent performance, fat removal and total cleaning efficiency. In many dairy CIP applications, warm or hot cleaning is used. Typical practical setpoints may be around 60–70°C Setpoint depends on chemistry and product type Temperature must be maintained during the active step
4 Time Even with correct chemistry and temperature, the cleaning step must be held for enough time to complete the cleaning mechanism. Shortened time creates inconsistent cleaning Automation prevents rushed cycles Validated time must be respected for each sequence
1T 1-Tank CIP System A 1-tank CIP system is the simplest configuration. It may be used as a compact skid, a small process plant solution or even a portable CIP unit. Suitable for small production Useful for simple circuits Limited recovery and reuse capability Can be designed as a portable unit
2T 2-Tank CIP System A 2-tank system is used when the plant needs better separation between detergent, water or recovery functions. Better process control than a single-tank design Useful for compact industrial applications Supports more efficient operation Can be adapted to plant cleaning philosophy
3T 3-Tank CIP System A 3-tank CIP arrangement is a very practical industrial configuration for dairy plants. Water tank Caustic / soda tank Acid tank Good separation of cleaning media
4T 4-Tank CIP System with Returned Water A 4-tank CIP system commonly includes a returned water or recovery water tank. This fourth tank is extremely valuable in real dairy plants. Water tank Caustic / soda tank Acid tank Returned water / recovery water tank
PHE Plate Heat Exchanger A plate heat exchanger is often selected when fast heat transfer, compact skid design and efficient heating are important. High heat transfer efficiency Compact footprint Fast response Requires correct plate and gasket compatibility
TUB Tubular Heat Exchanger A tubular solution may be preferred when mechanical robustness, durability or project standards require a more robust heat transfer arrangement. Robust design Good mechanical durability Suitable for demanding conditions Usually larger than compact plate systems
BHE Brazed Heat Exchanger A brazed heat exchanger may be used in some utility or compact heating applications, but compatibility must be checked carefully. Compact and efficient Economical in some duties Chemical compatibility must be verified Maintainability must be evaluated case by case
CIP of Pipes and Process Loops For pipeline CIP, the flow must be sufficient to create turbulent cleaning conditions. The inlet pipe velocity should normally be checked against the selected target velocity, commonly above about 1.5 m/s in many hygienic circuits. Check internal pipe diameter, not only nominal size Calculate required flow for the largest circuit Include valves, elbows, PHEs and static mixers in pressure-loss review Confirm that the return line can handle the required flow
CIP of Tanks and Vessels Tank cleaning is different from line cleaning. A tank cannot be designed correctly only by pipe velocity. The spray device must be selected to guarantee full surface coverage and sufficient impact or falling-film cleaning. Tank diameter and height are critical Spray pressure and spray flow must match the cleaning head Soil type determines required mechanical action Large tanks may require rotary spray or rotary jet devices
SB Static Spray Ball Static spray balls are suitable for light-duty cleaning, low-viscosity residues, simpler tanks and applications where high-impact cleaning is not required. Simple construction Low maintenance Lower cost Limited impingement energy
RH Rotary Spray Head Rotary spray heads provide better distribution and surface wetting than static spray balls in many hygienic tanks. Better coverage Improved wetting pattern Good for moderate soil conditions More efficient than static devices in many cases
RJ Rotary Jet Head Rotary jet heads are used for demanding cleaning duties, larger tanks, difficult residues and applications requiring higher mechanical action. Higher impact Stronger mechanical action Useful for difficult cleaning tasks Can reduce cleaning time in selected applications
Why Conductivity Is Critical Among all instruments, the conductivity meter is one of the most important in practical CIP service. It helps determine whether the circuit contains water or detergent, when rinsing is complete, when chemical return should be recovered or diverted and how concentration control is managed in automated systems.
Preferred Instrument Brands For high-quality hygienic instrumentation, many plants prefer established industrial brands such as Endress+Hauser, Siemens, IFM, WIKA and other approved equivalents depending on project standards. Final brand selection should match the project specification, hygienic connection type, accuracy requirement and plant automation philosophy.
Milk Reception and Storage Cleaning of milk reception lines, storage tanks, transfer pumps, valves and associated process circuits.
Pasteurizer Circuits CIP integration for pasteurizers, balance tanks, holding tubes, regeneration sections and hygienic valve arrangements.
Plate Heat Exchangers Cleaning of PHE circuits where correct velocity, temperature, chemical concentration and pressure-drop management are critical.
Cream and Fat Processing Cleaning systems for cream lines, fat-containing streams and circuits where detergent performance and temperature control are important.
Yogurt and Fermented Products CIP for yogurt process sections, mix tanks, fermentation-related transfer lines and hygienic processing equipment.
Cheese and Butter Lines Cleaning support for cheese milk preparation, butter processing, whey handling and fat-rich process areas.
DES Design Fanpod reviews the cleaning circuits, tank sizes, pipe diameters, spray requirements, recovery logic and utilities before defining the final CIP architecture.
CTL Control PLC/HMI logic can be developed around validated sequences, operator access, alarms, conductivity, temperature and flow confirmation.
INT Integration CIP systems can be integrated with dairy tanks, pasteurizers, PHEs, process manifolds, transfer lines and hygienic valve clusters.