Milk Cooling Storage Tank
A Milk Storage Tank with cooling system is a specialized sanitary refrigeration vessel used to rapidly chill freshly milked raw milk from around 37°C down to a safe storage temperature of 4°C.
PRODUCT DESCRIPTION
Description
Milk Cooling Tanks are critical equipment in industrial production. They preserve the quality of raw milk after milking, prevent the growth of harmful bacteria, and ensure safe milk storage. These systems are essential for milk processing plants, dairy farms and large-scale farms. They can rapidly cool milk to the ideal storage temperature of 4°C without altering the natural components of milk.
The direct-cooling milk storage tank can refrigerate and preserve various liquids, such as milk, plasma, fruit juice, wine and so on. It consists of refrigeration unit and tank body, fitted with Copeland scroll flexible compressor from the USA, and optional automatic CIP Cleaning System.
Specifications | 150L/200L | 500L | 1000L |
Plate Thickness | Inner:2 mm, Intermediate:1 mm, Outer:1.2 mm | Inner:2 mm, Intermediate:1 mm, Outer:1.2 mm | Inner:2 mm, Intermediate:1 mm, Outer:1.2 mm |
Installation Dimension | 1550-800-1350 | 1800-1100-1650 | 1900-1200-1900 |
Tank Capacity | 650-50-2 | 1000-650-3 | 1200-900-3 |
Refrigeration Capacity | 5000 kcal/h | 6000 kcal/h | 6000 kcal/h |
Refrigerant | R22 | R22 | R22 |
Thermal Insulation Performance | ＜1℃/3H | ＜1℃/3H | ＜1℃/3H |
Power | 0.37 kW | 0.75 kW | 0.75 kW |
Customization is available per your requirements.
Working Principle & Structure
The milk cooling tank is mainly composed of tank body, agitator, cleaning device, refrigeration unit and electric control cabinet. It adopts horizontal elliptical tank structure. Rigid polyurethane foam is filled between inner and outer shells, featuring low thermal conductivity, light weight, high mechanical strength and low water absorption for superior insulation performance. Adopting advanced design and fabrication process, the equipment delivers reliable performance with cooling, heat-preservation and hygiene standards reaching international advanced level.
Applications
It is mainly used for refrigeration and storage of raw milk, and can also refrigerate and store other liquid materials. It adopts large-area straight-wall cooling. One-click operation and monitoring are realized through the automatic control system, which rapidly cools raw milk down to the target temperature in ℃ and maintains constant temperature continuously. It inhibits bacterial reproduction and keeps raw milk at Grade-A milk quality.
Introduction to Direct-Cooling Milk Cooling Tank
Milk cooling tank serves as key Supporting Equipment for mechanized milking on farms. It is also suitable for manual milking at farms and milk collection stations, as well as cooling and storage of fresh raw milk in dairy plants. It is mainly used for cooling and storing fresh milk and other liquid materials. With automatic control system, one-step monitoring and operation quickly brings raw milk down to target temperature and maintains constant temperature, effectively inhibiting bacterial growth and preserving Grade-A milk quality.
Advantages & Features of Direct-Cooling Milk Storage Tank
· Constructed from SUS304 Stainless steel for extended service life.
· Durable thermal insulation: temperature fluctuation ≤2℃ within 24 hours after unit shutdown.
· Fast cooling performance: raw milk can be cooled from 35℃ down to 2℃ within 1 hour.
· Well-designed evaporator prevents liquid from freezing.
· Fully automatic control system for easy operation.
· Customizable upon client requirements.
Intelligent Solutions
Proprietary Intelligent System: IoT Gateway + Cloud Management Platform (Shentu Cloud) Compatible with PLC / frequency converters / instruments for seamless realization of:
1. Real-time production data acquisition
2. Remote monitoring & equipment control
3. Fault early-warning & predictive maintenance
4. Energy consumption optimization
5. Intelligent production-process assistance
6. Multi-terminal management (APP / Web)
· High-Efficiency Thermal Insulation: 60-80 mm polyurethane foam delivers outstanding heat-insulating performance.
· Global Spare-Parts Supply: Preliminary solutions provided within 3 hours; engineers dispatched within 72 hours.
· Flexible MOQ Options: Trial orders starting from 1 unit are accepted, with volume-purchase discounts available.
Our Service
Product & Production-Line Customization
Full-Range Customization: End-to-end solutions from requirement analysis to delivery, covering the complete food-processing workflow (raw-material handling → finished-product packaging).
Scalable Flexibility: Supports pilot-scale production lines as well as large-scale processing lines for meat, dairy, fruits & vegetables with capacity up to 10,000 tons.
FAQ
Q: How about payment term, payment safety and delivery time?
A: We accept 40% deposit, balance before shipment. And Irrevocable L/C at sight.Delivery time is 7 to 30 days. It is according to order quantity.
Q: How could we confirm the products?
A: Our professional engineers will follow up all the designs and ajustments according to your requirement.OEM and ODM available.
Q: What services can we provide?
A:Accepted Delivery Terms: FOB,CFR,CIF,EXW,DDP,DDU,Express Delivery；
Accepted Payment Currency:USD,EUR,CNY;
Accepted Payment Type: T/T,L/C,Credit Cardl,Western Union,Alipay;
Q: How can I know your machine works well?
A: Before delivery, we shall test the machine working condition for you.
Q: What's your MOQ?
A: 1 set.
Sanitary Cold Water Storage Tank – Complete Industry Guide
1. Introduction
A Sanitary Cold Water Storage Tank is a specialized vessel designed to store liquid under hygienic and contamination-free conditions. These tanks are widely used in industries that require low temperture for storage and process ,such as ,milk,food,juice,dairy and beverage production, pharmaceuticals, healthcare, brewing, and chemical applications.
Constructed with food-grade or pharmaceutical-grade Stainless steel, these tanks ensure:
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Corrosion resistance
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Hygienic liquid storage
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Long-term durability
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Energy efficiency (when used with insulated or refrigerated designs)
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Modern facilities rely on these tanks to ensure a consistent supply of clean, chilled, or ambient-temperature liquid, preventing bacterial growth and contamination. Properly designed sanitary cold water tanks are crucial for quality assurance and regulatory compliance in hygienic industries.
2. Definition
A sanitary cold water storage tank is a stainless steel vessel designed to store cold or chilled water for industrial or commercial purposes. Key features include:
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Smooth, polished inner surface (Ra ≤ 0.4–0.8 µm) to prevent microbial growth
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CIP (Clean-in-Place) compatible design
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Hygienic inlet and outlet fittings
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Optional insulation for temperature retention
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Compliance with GMP, FDA, and ASME standards
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These tanks are typically integrated into systems where water quality, temperature control, and hygiene are critical.
3. Key Features
3.1 Hygiene and Safety
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Fully drainable design prevents water stagnation
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Mirror-polished inner surface reduces bacterial adhesion
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CIP-compatible for automated cleaning cycles
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Sanitary fittings and welds
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3.2 Material Advantages
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Stainless steel (SS304, SS316L) offers corrosion resistance
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Resistant to biofilm formation
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Non-reactive with potable water
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Long lifespan (15–30 years)
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3.3 Structural Features
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Vertical and horizontal designs available
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Insulated or non-insulated configurations
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Pressure or atmospheric operation
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Modular and customizable sizes
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4. Working Principle
Sanitary Cooling tanks operate by storing water at controlled low temperatures and providing it to downstream systems as required. Key operating steps include:
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Water Inlet
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Cold water enters via sanitary pipelines or chilled water loops.
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Storage
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Water is held inside the tank, optionally insulated to maintain low temperatures.
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Distribution
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Water is distributed to processing or service systems via sanitary piping.
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Temperature Maintenance
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Insulated tanks or refrigerated units maintain temperature stability.
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Cleaning
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CIP systems ensure tanks remain hygienic and free from microbial contamination.
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5. Materials of Construction
5.1 Common Materials
Material Grade | Properties | Application |
SS304 | Standard food-grade stainless steel | General industrial and commercial applications |
SS316L | Enhanced corrosion resistance | Pharmaceutical, chemical, and high-purity water systems |
SS321 | High temperature & corrosion resistance | Specialized applications with thermal variation |
Duplex Stainless Steel | High strength and corrosion resistance | Large-scale industrial storage tanks |
5.2 Material Advantages
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Resistant to oxidation and corrosion
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Non-toxic and food-safe
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Durable under mechanical stress
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Easy to clean and maintain
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6. Structural Design
Sanitary cold water tanks are engineered with several critical components:
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Inner shell: Smooth stainless steel for hygiene
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Outer shell: Protective layer or jacket
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Insulation: PU foam, rock wool, or glass wool for thermal retention
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Inlets & outlets: Hygienic, CIP-compatible valves
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Manholes: For inspection and maintenance
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Supports: Legs or skid base for stability
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7. Types of Sanitary Cold Water Storage Tanks
7.1 Vertical Tanks
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Saves floor space
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Common in industrial plants
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Capacities ranging from 500L to 50,000L
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7.2 Horizontal Tanks
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Easy maintenance
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Stable and robust
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Common in facilities with height restrictions
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7.3 Insulated Tanks
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Retain cold temperature
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Reduce energy loss
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Often integrated with refrigeration units
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7.4 Pressurized Tanks
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Operate under controlled internal pressure
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Enable rapid water distribution
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Suitable for high-demand applications
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7.5 Atmospheric Tanks
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Non-pressurized
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Simple and cost-effective
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Widely used in potable water storage
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8. Advantages of Sanitary Cold Water Tanks
8.1 Hygiene and Safety
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Prevents bacterial growth
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Reduces contamination risk
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CIP and SIP compatible
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8.2 Corrosion Resistance
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Stainless steel ensures long-term durability
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Suitable for both potable and process water
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8.3 Thermal Efficiency
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Insulated tanks maintain stable low temperatures
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Reduces energy consumption for cooling
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8.4 Structural Strength
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High mechanical strength for large-volume storage
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Resists deformation or leakage
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8.5 Environmental Benefits
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Stainless steel is fully recyclable
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Energy-efficient design reduces environmental footprint
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Long service life minimizes material waste
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9. Applications
9.1 Industrial Applications
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Food processing plants
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Breweries and beverage production
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Pharmaceutical manufacturing
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Cosmetic production facilities
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Chemical processing plants
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9.2 Commercial Applications
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Hospitals and healthcare facilities
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Hotels and resorts
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Commercial kitchens
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Laundries and sanitation services
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9.3 Residential & Energy Applications
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Solar cold water systems
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Central water storage for large buildings
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Chilled water distribution systems
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10. Technical Specifications
Parameter | Specification Range |
Capacity | 500L – 100,000L+ |
Material | SS304 / SS316L |
Temperature Range | 0°C – 25°C (cold water) |
Insulation Thickness | 50mm – 150mm |
Pressure Rating | 0–10 bar (customizable) |
Surface Finish | Ra ≤ 0.4–0.8 µm |
Tank Type | Vertical / Horizontal |
Cooling Method | Natural / Refrigerated / Chilled water coil |
Design Standard | ASME / PED / GMP compliant |
Lifespan | 15–30 years |
11. Thermal & Insulation Systems
Common Insulation Materials
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Polyurethane (PU) foam
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Rock wool
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Glass wool
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Vacuum insulated panels (VIP) for high-end applications
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Benefits
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Minimizes heat ingress
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Maintains low temperature
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Reduces cooling energy cost
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Supports industrial hygiene standards
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12. Manufacturing Process
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Material Selection: Food-grade stainless steel sheets
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Cutting & Rolling: Tank components are shaped and prepared
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Sanitary Welding: TIG welding ensures smooth and hygienic joints
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Polishing: Mirror finish for Ra ≤ 0.4 µm
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Insulation Application: PU foam or rock wool insulation
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Assembly: Fittings, valves, sensors installed
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Pressure & Leak Testing: Ensures integrity under operating conditions
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Final Inspection: Confirm compliance with hygiene and thermal standards
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13. Installation Guidelines
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Flat, stable foundation
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Adequate space for maintenance
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Connection to cold water systems or chilled loops
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Integration with temperature sensors and pressure relief devices
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Follow local safety regulations
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14. Maintenance & Cleaning
Routine Maintenance
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Inspect insulation and structural integrity
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Check valves and fittings
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Monitor temperature and pressure
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Cleaning (CIP)
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Circulate cleaning agents
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Rinse with potable water
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Sterilization cycles
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Prevent biofilm accumulation
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Benefits
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Extends tank lifespan
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Ensures continuous hygiene compliance
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Reduces operational failures
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15. Energy Efficiency Strategies
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High-density insulation
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Integration with refrigeration loops
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Smart temperature monitoring
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Optimized water circulation systems
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Heat recovery from industrial processes
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16. Industry Standards
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GMP (Good Manufacturing Practices)
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ASME Boiler & Pressure Vessel Code
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PED (Pressure Equipment Directive)
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ISO 9001 Quality Management
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FDA-compliant materials
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17. System Integration
Sanitary cold water storage tanks are often integrated with:
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Chillers and refrigeration units
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CIP systems for hygiene
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Water filtration systems
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HVAC and chilled water distribution
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Process water systems for food and pharmaceuticals
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18. Troubleshooting Guide
Issue | Possible Cause | Solution |
Temperature rise | Insulation failure | Replace or repair insulation |
Water contamination | Improper cleaning | Implement CIP/SIP system |
Pressure drop | Blocked valves | Clean or replace valves |
Leakage | Weld or fitting failure | Repair or re-weld affected areas |
Cooling inefficiency | Refrigeration system issue | Service or upgrade cooling system |
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Future Trends
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Smart IoT water monitoring
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AI-assisted energy optimization
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Modular tank systems
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Advanced nano-insulation
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Hybrid cooling and solar integration
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Fully automated hygienic control
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20. FAQs
Q1: What is a sanitary cold water storage tank?
A: A stainless steel tank designed to store cold water hygienically, preventing bacterial growth and contamination.
Q2: What materials are used?
A: SS304 for standard applications, SS316L for high-purity and corrosive environments.
Q3: How long does it last?
A: Typically 15–30 years, depending on maintenance and usage.
Q4: Is insulation necessary?
A: Yes, to maintain low temperatures and reduce energy costs.
Q5: Can it be used in pharmaceutical applications?
A: Absolutely, with SS316L material and GMP compliance.
21. Conclusion
The Sanitary Cold Water Storage Tank is essential for any system requiring safe, hygienic, and temperature-stable water. With its stainless steel construction, corrosion resistance, and hygienic design, it ensures compliance with global standards and provides reliable performance across industrial, commercial, and residential applications
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