Corrosive Product Filling Machine: The Essentials in 30 Seconds
Technical Summary
Filling corrosive products, such as certain industrial acids (e.g. phosphoric acid), chlorinated products, or aggressive chemical solutions, involves specific constraints. Unlike many industrial applications, a stainless steel machine is not always suitable. Some products can attack metals, seals, or certain components of the filling line.
In this context, manufacturers must select chemically compatible materials. Depending on the application, a corrosive product filling machine may include components made of PVC, HDPE, HDPP, PEEK, or Viton seals to withstand the product’s chemical environment.
However, machine selection does not depend solely on the corrosive nature of the liquid. Product behavior also plays a major role: whether the product is free-flowing, foamy, or viscous. Finally, real production trials remain essential to validate both dosing performance and material compatibility.
Why Does Filling Corrosive Products Involve Specific Constraints?
Corrosive products have one major characteristic: they can attack materials in contact with the product.
Usually, some aggressive chemical liquids gradually degrade metals, seals, or specific technical components of the filling machine. In this context, a standard stainless steel design is not always sufficient.
In other words, material selection becomes a key aspect of the project.
These constraints are commonly found with:
- industrial acids, such as phosphoric acid
- chlorinated products
- industrial cleaning products
- technical detergents
- chemical treatment products
As a result, the manufacturer must characterize the product in order to identify the most suitable materials.
Why Is a Stainless Steel Machine Not Always Suitable?
In the filling industry, stainless steel is often considered the reference material. However, some corrosive products can damage stainless steel depending on their chemical nature and concentration.
In this context, manufacturers may turn to alternative technical materials that are better suited to the product’s behavior.
Depending on the application, a corrosive product filling machine may include:
- PVC
- HDPE (high-density polyethylene)
- HDPP (high-density polypropylene)
- PEEK for certain technical components
- Viton seals
In addition, some machines may also include painted stainless steel structures, depending on project requirements.
The real challenge is therefore to ensure overall chemical compatibility between the product and all components in contact with it.
What Requirements Should You Discuss with Your Machine Manufacturer?
Filling corrosive products requires several technical precautions.
Validate Material Compatibility
First and foremost, it is essential to verify the chemical compatibility between the product and all contact materials.
This analysis typically includes:
- tanks
- filling nozzles
- seals
- piping
- exposed fasteners and screws
This step directly impacts the durability of the filling line.
Limit Product Retention Areas
Next, some corrosive products require minimizing areas where liquid may stagnate.
As a result, certain filling lines use conical-bottom tanks to improve drainage and reduce product retention.
Choose the Right Nozzle Technology
Corrosiveness is not the only factor to consider.
Indeed, some products may also be foamy, free-flowing, or more viscous. Therefore, nozzle selection must also take into account the product’s actual behavior.
For example, highly foaming products may require restrictor nozzles, designed to promote a more diffuse and cleaner flow.
Plan for Line Cleaning
Finally, depending on the product and target production rate, some installations may include Cleaning In Place (CIP) systems to simplify equipment cleaning.
Summary of Corrosive Product Filling Constraints
| Product Constraint | Impact on Filling | Technical Solution |
|---|---|---|
| Chemical corrosiveness | Component degradation | Compatible material selection |
| Metal attack | Premature wear | PVC, HDPE, HDPP, PEEK, Viton |
| Retention zones | Product/machine degradation | Conical-bottom tanks |
| Foaming product | Overflow or container contamination | Restrictor nozzle |
| Complex cleaning | High downtime | CIP |
Which Filling Machine Should You Choose for Corrosive Products?
The choice of a corrosive product filling machine primarily depends on the product’s actual behavior.
A highly fluid product will not require the same approach as a foaming or more viscous liquid.
In this context, the manufacturer must simultaneously consider:
- chemical compatibility
- product viscosity
- foam generation level
- target production rate
- required level of automation
In other words, the project goes far beyond simply selecting a pump or nozzle.
Why Are Trials Still Essential?
To secure a corrosive product filling project, real production trials remain essential.
They make it possible to validate:
- material compatibility with the product
- dosing accuracy
- achievable production rate
- filling cleanliness
- the actual behavior of the liquid
- ease of cleaning the line
This approach helps reduce technical risks before industrial deployment.
For this reason, take part in filling trials using your product and packaging.
Conclusion
Filling corrosive products involves specific technical constraints. Unlike many industrial applications, a stainless steel machine is not always the best solution.
The choice of compatible materials — PVC, HDPE, HDPP, PEEK, or Viton seals — often becomes a key factor in the project.
However, corrosiveness alone does not determine the right technology. The product’s actual behavior — whether foamy, free-flowing, or viscous — also strongly influences line design.
Finally, real production trials remain the best way to secure a corrosive product filling project.
Over recent years, MOM Packaging has supplied liquid filling machines designed for demanding industrial environments.
MOM Packaging has been designing dosing and filling machines since 1927, with long-standing expertise in technical liquids and complex products.
MOM Packaging supports manufacturers in more than 60 countries across Europe, Africa, the Middle East, Oceania, the Americas and East Asia.
Louis Derangère
CEO of MOM Packaging — Industrial Automation Engineer and Precision Dosing Expert.