Dairy Processing Equipment | Heat Exchangers & Tanks

Introduction

Dairy and food processing plants rely on two critical types of equipment: heat exchangers and process tanks. These components work together to heat, cool, store, and mix your products safely and efficiently.

Choosing the right equipment impacts:

Product quality and consistency
Energy consumption and operating costs
Food safety and regulatory compliance
Equipment lifespan and maintenance requirements

This guide covers everything you need to know about:

Heat exchanger food applications
Plate heat exchanger dairy processing systems
Process tanks for dairy industry requirements
Stainless steel tanks food processing specifications

Use this information to make informed decisions for your next equipment investment.

Part 1: Heat Exchangers for Food Processing

What Is a Heat Exchanger Food System?

A heat exchanger food system transfers heat between two fluids without mixing them. In food processing, it is used to:

Pasteurise milk and juices
UHT treat shelf-stable products
Cool products before packaging
Heat products for cooking or melting
Recover waste heat to save energy

Types of Heat Exchangers for Food Applications

Type	Best For	Key Features
Plate heat exchanger	Low-viscosity liquids (milk, juice)	High efficiency, compact size, easy cleaning
Tubular heat exchanger	Higher viscosity, products with particles	Robust design, handles pressure, easy maintenance
Scraped surface heat exchanger	Very viscous, sticky, or crystallising products	Prevents fouling, continuous operation

Benefits of Modern Heat Exchangers

Energy efficiency: Regenerative sections recover 90-95% of heat.
Compact footprint: Plate types need minimal floor space.
Easy maintenance: Gasketed plates can be opened for inspection.
CIP compatible: Designed for automated cleaning without disassembly.

Part 2: Plate Heat Exchanger Dairy Processing

What Is a Plate Heat Exchanger?

A plate heat exchanger dairy processing system uses a series of corrugated stainless steel plates. Fluids flow between alternate plates, transferring heat efficiently. This is the most common type for dairy applications.

How It Works

Product flows between the plates.
Heating or cooling media flows between adjacent plates.
Heat transfers through the thin stainless steel.
The product reaches the target temperature.

Why Dairy Plants Choose Plate Heat Exchangers

Advantage	Why It Matters for Dairy
High thermal efficiency	Lower energy bills, faster processing
Tight temperature control	Consistent pasteurisation, better quality
Compact design	Fits in space-constrained facilities
Easy plate addition/removal	Adjust capacity as your plant grows
Full drainability	No product trapped, no bacteria harbourage

Typical Dairy Applications

Milk pasteurisation
Cream heating and cooling
Yogurt base processing
Ice cream mix treatment
Whey pasteurisation

What to Look for in a Plate Heat Exchanger

316 stainless steel construction
EHEDG or 3-A hygienic certification
High heat recovery design
Easy access for gasket replacement
Compatibility with your CIP system

Gemak partners with Alfa Laval, an industry leader, to supply gasketed and brazed plate heat exchangers for dairy processing.

Part 3: Process Tanks for the Dairy Industry

What Are Process Tanks?

Process tanks for the dairy industry are vessels used to hold, store, mix, or treat dairy products. They are the workhorses of any dairy plant.

Types of Process Tanks

Tank Type	Primary Use	Key Features
Storage tanks (silos)	Holding raw or finished products	Insulated, large capacity (up to 250,000L), level sensors
Mixing tanks	Blending ingredients	Agitators, load cells, heating/cooling jackets
Buffer tanks	Smoothing flow between processes	Level control, CIP compatibility
Receiving tanks	Raw milk intake	Filters, cooling, aeration prevention

Key Specifications to Evaluate

Capacity

Tanks range from small 500L vessels to large 250,000L silos. Choose based on your production volume and shift patterns.

Material

304 stainless steel: Suitable for many dairy applications.
316 stainless steel: Better corrosion resistance for salty or acidic products.

Surface Finish

Finish	Application
2B mill finish	Non-product contact surfaces
180 grit polished	General product contact
320 grit or finer	Sensitive products, maximum cleanability

Insulation

Insulated tanks: Maintain temperature, reduce condensation, save energy.
Non-insulated tanks: For short-term holding or ambient temperature products.

Agitation Options

Propeller agitators: Low viscosity liquids
Turbine agitators: Medium viscosity
Anchor or gate agitators: High viscosity
Ribbon agitators: Powders and high viscosity
High-shear agitators: Emulsions and difficult dispersions

Part 4: Stainless Steel Tanks Food Processing

Why Stainless Steel?

Stainless steel tanks food processing facilities use stainless steel for excellent reasons:

Non-reactive: Does not affect product taste or safety.
Corrosion-resistant: Withstands cleaning chemicals and salty products.
Smooth surface: Easy to clean and sanitise.
Durable: Lasts decades with proper maintenance.
Recyclable: Sustainable end-of-life disposal.

Grades of Stainless Steel for Food Tanks

Grade	Properties	Best For
304	Good corrosion resistance, cost-effective	Milk, water, non-salty products
316	Superior corrosion resistance, molybdenum added	Salty products, whey, chemical applications

Hygienic Design Features

A properly designed stainless steel tank for food processing includes:

Sloped bottoms for complete drainage
Radiused corners (no sharp angles)
CIP spray balls for automated cleaning
Sanitary fittings (Tri-clamp, not threaded)
Polished welds (smooth, no crevices)
Vent filters to prevent contamination

Common Food Processing Applications

Dairy (milk, yogurt, cheese, cream)
Beverages (juice, plant-based milk)
Sauces and condiments
Soups and ready meals
Ice cream and dessert mixes

Part 5: Integration – How Heat Exchangers and Tanks Work Together

Heat exchangers and tanks do not operate in isolation. They work together as a system.

Typical Dairy Processing Flow

Receiving tank: Raw milk arrives and is stored.
Plate heat exchanger: Milk is pasteurised.
Buffer tank: Pasteurised milk awaits further processing.
Mixing tank: Ingredients are added for yogurt or ice cream.
Storage tank: Finished product awaits packaging.

Why Integrated Design Matters

Separate Suppliers	Integrated Partner
Different standards, mismatched components	One design philosophy, perfect fit
Finger-pointing when problems occur	Single-point accountability
Longer lead times	Coordinated manufacturing
Multiple warranties	One warranty for the entire system

Choosing a single food processing engineering company to supply both heat exchangers and tanks ensures seamless integration.

Part 6: Comparison Table – Choosing Your Equipment Partner

Factor	Equipment Reseller	True Manufacturer (Gemak)
Owns factory	❌ No	✅ Yes
In-house tank fabrication	❌ No	✅ Yes
In-house heat exchanger supply	❌ Subcontracted	✅ Partnered with Alfa Laval
Hygienic design expertise	Varies	✅ EHEDG, 3-A standards
Custom tank sizes	Limited	✅ Up to 250m³, bespoke
Automation integration	Bolted-on	✅ In-house
UK-based support	Varies	✅ Yes

Part 7: Why Gemak Is the Right Choice

Gemak has over 40 years of industry heritage and 15 years of dedicated UK operations.

Our Capabilities

Equipment	Our Offering
Heat exchangers	Plate (Alfa Laval partner), tubular, scraped surface
Process tanks	Up to 250m³, 304/316 stainless, 3A finish
Automation	In-house PLC, HMI, recipe management
Installation	45+ person site works team
Service	UK-based support, genuine spares

Our Facility

12,000 m² state-of-the-art factory
25m high tank production area
Automatic welding and polishing
Pressure testing and 3A finishing

Our UK Track Record

Wensleydale Cheese: 15,000 lph processing plant
South Caernarfon Creameries: Project Dragon whey facility
Meadow Foods: Plant-based yoghurt line

Conclusion

Choosing the right equipment for your dairy or food processing plant is critical. Focus on:

Heat exchanger food systems that offer high efficiency and hygienic design
Plate heat exchanger dairy processing units with regenerative heating
Process tanks for the dairy industry built to 3A standards
Stainless steel tanks food processing applications with proper finish and agitation

Work with a partner who offers in-house manufacturing, UK-based support, and proven experience.

👉 Visit Gemak UK: https://www.gemak.co.uk/ to discuss your heat exchanger and tank requirements.