milk filling machine

Milk Bottling & Liquid Dairy Filling Machines – USA & Canada

Serac offers high- and medium-speed filling and capping machines featuring 3-A hygienic design for liquid and viscous dairy products in PET, HDPE, and other rigid packaging—designed and built from our US-based factory in Illinois.

Our equipment features aseptic design and is ideal for a variety of dairy shelf-life requirements, such as ESL (Extended-Shelf-Life) milk and cream applications.

Serac Bottling Equipment for Milk and Liquid Dairy

Our bottling machines use Net Weight Filling Technology, which is ideal for liquid dairy and milk packaging processes that demand high levels of hygiene and accuracy.

With over 45 years serving the North American dairy market and global expertise dating back to our founding in 1969, Serac ensures local support and world-class manufacturing. We are the trusted source for high-quality dairy filling and bottling equipment.

 

Key Benefits of Net Weight Filling Technology for Milk Bottling:

  • Reduce product give-away and losses, filling with permanent control of the final weight
  • Non-contact hygienic filling technology, capable to fill from 1 ounce to 2 gallons
  • Hygienic design with 3-A Sanitary Standards (USA), extends shelf-life and reduces cleaning downtime
  • Able to fill both foamy and viscous dairy products on the same machine, without changeover.
  • Low maintenance requirements, lower operational costs

 

Serac Milk and Liquid Dairy Bottling Machines

  • Ideal for: Low-acid and high-acid products (milk, yogurt drinks, kefir, creamer).
  • High Flexibility: Fills various shapes (bottles, jugs with handles, non-stackable cups, jars), sizes and materials (PET, HDPE, Glass, PP, Paper).
  • Medium-High Speed Production: 3,000 to 50,000 bottles per hour
  • Superior Accuracy: 1g sigma per 1000g (0.1%).

Read more about Serac Net Weight Filling Capabilities…

Serac Milk Bottling Solutions for a wide range of liquid dairy products

Bottling of Milk and Liquid Dairy

Why Choose Serac Net Weight Filling Technology?

For dairy producers, product giveaway is a major source of lost profit. Our net weight filling technology is the solution. It provides high accuracy, ensuring you don’t overfill, while our hygienic design guarantees product safety.

✓ Superior Accuracy

Delivers a high accuracy (standard deviation, or sigma) of 1g per 1000g (0.1%). This means 99.7% of 1kg fills are within a ±3g range (997g to 1003g).

This accuracy is independent of product temperature, aeration, or foam.

✓ Capacity & Speed Medium to high-speed rotary configurations, from 3,000 to 50,000+ bottles/hour.
✓ High Flexibility

Handles a massive range of product recipes and container formats, including a 20x volume range on the same machine.

✓ Hygienic Design

Meets 3-A Sanitary Standards and USDA requirements with automatic CIP cleaning.

 

Choose Net Weight technology when you:

  • Fill multiple container formats and product recipes at medium-high speed
  • Require less than 1% accuracy due to high giveaway sensitivity
  • Run premium or high-value products like liquid dairy
  • Need to ensure strict regulatory compliance and traceability
  • Require high level of hygiene

 

Serac Net Weight Filling and Capping Machines’ Capabilities

For more details of Serac milk bottling system capabilities, click on each section below:

Hygienic Design Standards
  • Built to 3-A Sanitary Standards, ensuring every component on your milk bottling line is made from specified, food-grade materials like high-grade stainless steel.
  • Feature no-contact, splash-free nozzles to prevent cross-contamination.
  • Option of our patented MULTIFLOW® nozzle—an aseptic-standard valve that gives you precise control over flow rate and opening/closing speed. This adaptability allows you to optimize fill cycles for different product characteristics, significantly reducing foaming and ensuring gentle handling of sensitive dairy formulations.

 

To ensure product safety, we offer Packaging Decontamination Treatments:

Decontamination Treatment Bottle Cap Alu Foil
Wet Peracetic Acid Yes Yes  
Controlled Dry H₂O₂ Yes Yes Yes
Pulsed Light   Yes Yes
BluStream® Yes Yes Yes
Ozonated Water Yes    
Product Versatility & Applications
Serac dairy filling machines for various glass, PET, and HDPE milk bottles and jugs

Best for:

  • Whole Milk, 2% Reduced‑Fat Milk, 1% Low‑Fat Milk, Skim / Fat‑Free Milk, Lactose‑Free Milk, Organic Milk, Flavored Milk, Ultra‑Filtered / A2 Milk
  • Dairy alternatives like almond, soy, oat, and coconut milk
  • Coffee Creamer, Heavy Cream, light creams, whipping creams, half‑and‑half, Whipped Cream (aerosol cans)
  • Fermented dairy drinks like kefir, yogurt drinks, lassi, buttermilk, cultured smoothies, probiotic shots
  • Protein dairy drinks / shakes

 

Product Handling:

  • Liquid to viscous (up to 40,000 cP),
  • Foamy textures,
  • and Particles up to 10×10×10mm.

 

The design of our filling and capping machines are dependant of the specificities of the dairy products to be filled.

Dairy Specifities Shelf-Life Distribution Bottling Application
Fresh Pasteurized Milk 7 to 28 days Chilled Clean Filler
ESL Milk 30-45 days Chilled Ultra-Clean Filler
ESL Milk + 60 – 120 days Chilled Ultra-Clean Filler
UHT Milk 90 – 360 days Ambient FDA-Approved Aseptic Filler
Compatible Container Types

Materials:

  • PET, rPET, HDPE, PP, PS, Glass, Paper, and Metal.

 

Serac also offers: PET Blower-Filler-Capper Multiblock

On-site PET bottle blow moulding delivers significant operational advantages:

  • Complete design freedom—customize bottle size and shape to match your exact product requirements
  • Reduced carbon footprint by eliminating empty bottle transportation
  • Superior bottle quality at lower total cost of ownership
  • Enhanced hygiene through seamless preform-to-fill integration, eliminating dust contamination risks inherent in pre-blown bottles

 

Formats:

  • Bottles, non-stackable cups, jugs, jars, and pails.
  • Handles different types of round and rectangular shapes, including containers with handles.

 

Sizes:

  • Can handle a 20X volume range on the same machine.
  • For example: from a 6 fl oz single-serving yogurt drink to a 1-Gallon jug of milk (which is 128 fl oz).
Sealing & Closure Options

Heat Sealing :

  • Aluminum foil (conduction heat sealing, induction heat sealing)
  • PET/PP foil (pre-cut or rollstock)

 

Overlid Options:

  • Snap-on plastic lids (over-cap)
  • Screwcaps
  • Twist-off
  • Dispensing cap (e.g. for whipped cream)
Traceability

Our dairy filling machines feature an advanced, easy-to-use control center for your entire milk bottling line.

  • Meet U.S. Compliance: Get the complete data-logging and traceability you need for regulatory inspections.
  • Total Process Monitoring: Track every container from decontamination to final capping, with the ability to monitor each station individually.
  • Fast Diagnostics: Quickly find the root cause of any packaging anomaly with easy-to-use, drill-down analysis.

North American Liquid Packaging Machinery Manufacturer

Serac Inc designs, engineers and builds machines in the USA. Our proximity is enhanced by our international presence & expertise, allowing us to offer unmatched services at the highest standards across the Americas.

Serac Inc slogan

Welcome to Serac Inc, where we make filling, capping and sealing machines for yogurt products and dairy-free alternatives in cups and bottles

Our factory in Carol Stream, IL is open for Visits.


📍 View Serac Inc on Google Maps

To book a factory visit: [email protected]

Contact us..

To inquire about our solutions: Fill in our contact form here.

To get technical support of After-Sales service: Visit this page.

Your Questions, Answered (FAQ)

How does filling accuracy (product giveaway) impact my profitability?

Overfilling to stay compliant means “giveaway” and it can cost tens of thousands. Net Weight filling is the solution to reduce this cost.

Sample Case: The Cost of Product Giveaway

*Using assumptions of production & cost

Product & Cost: Whole Milk @ $1.00 per kg

Annual Operation: 300 days/year (6 days/week × 50 weeks)

Daily Production (before calculating Downtime):

  • 64 fl oz Whole Milk (8 hours @ 12,000/hr) = 96,000 containers

 

Total Annual Production: 28.8 Million containers

Target weight: 1,950 grams per container

 

Based on this production volume, the only variable is the filler’s accuracy:

OTHER FILLER

(for 64 fl oz Whole Milk)
3g
sigma (σ)
Annual Giveaway
$86,400
86.4 tonnes

NET WEIGHT FILLER

(for 64 fl oz Whole Milk)
1.5g
sigma (σ)
Annual Giveaway
$43,200
43.2 tonnes

YOUR ANNUAL SAVINGS WITH NET WEIGHT FILLER

DOLLARS SAVED
+$43,200
per year
PRODUCT SAVED
43.2
tonnes per year

50% REDUCED LOSSES

 

A note on accuracy: Net Weight fillers typically achieve 0.10% accuracy (e.g., ±1g per 1,000g target). For larger format containers like this 64 fl oz example, accuracy can improve further — in this case to approximately 0.08% (±1.5g per 1,950g). Actual performance depends on your specific product recipe and viscosity.

This is an illustrative example. Actual savings vary based on your specific operation parameters.

How much does a milk filling machine cost?

The cost of a milk filling machine depends on your specific project. The main factors include:

  • the packaging format (shapes, materials, sizes),
  • your product recipes (viscosity, density, foaming),
  • required production speed per minute or hour.

 

Please contact us with these details (click here) and our US-based team will provide a detailed estimation.

What are the downtimes with your milk fillers?

Our machines are designed for high hygiene and flexibility to minimize downtime. Typical non-production times are:

  • CIP (Clean-in-Place): ± 90 to 180 minutes
  • Tooling Changeover: ± 10 to 30 minutes
  • Recipe Changeover: ± 15 minutes

 

Note: The data is generic; actual values vary based on machine type, product recipe, usage patterns and local regulations.

Please contact us to find out more (click here)

What is the typical lifespan of your filling machines?

Serac machines are designed for reliability and longevity. With proper preventative maintenance (which our HMI can help you schedule), our machines have a typical lifespan of 20 years or more in a demanding dairy production environment.

Can Serac support the full line of milk packaging?

Yes. Our milk filling machines can integrate seamlessly with your existing equipment.

For new projects, we can also provide a full turnkey packaging line, including blow-molders, unscramblers, conveyors, labelers, sleevers, case packers, palletizers, and more.

What about liquid & viscous dairy products in cups, such as yogurts with fruit pieces?

For dairy products with complex, heterogeneous recipes and formats, volumetric cup filling solutions from Serac are the optimal match. This is also the recommended technology when your product viscosity exceeds 40,000 cPo.

Our volumetric cup filling and sealing machines are engineered to handle:

  • Complex inclusions: We perfectly dose yogurts with large fruit chunks, chocolate pieces, or other particles, ensuring the structural integrity of your high-value product is maintained.
  • Innovative Formats: Volumetric cup fillers from Serac easily handle multi-layer applications, toppings, and are especially suited for multi-compartment cups (e.g., for granolas or separated toppings).
  • Recipe Precision: Our fillers deliver a consistent volume of each ingredient to the exact right location within the cup and are able to dose up to 5 different fillings simultaneously.

 

Our solutions accommodate all container types (Round and rectangular cups in PS/PP/PET, Carton, Paper), offering scalable speeds: 800–6,000 cups/hour (rotary fillers) & up to 60,000 cups/hour (linear fillers)

Discover how our volumetric technology can help you with innovative, complex recipes that command a premium price. Visit our dedicated page for yogurt filling solutions here

Do you provide service and support in Canada?

Yes. While our primary factory is in the USA, our North American service team provides full support for our Canadian customers. This includes dedicated installation, commissioning, maintenance, and technical support.