{"id":10872,"date":"2026-07-16T10:06:38","date_gmt":"2026-07-16T08:06:38","guid":{"rendered":"https:\/\/www.mom-packaging.com\/?p=10872"},"modified":"2026-07-16T10:06:38","modified_gmt":"2026-07-16T08:06:38","slug":"vinegar-filling-machine","status":"publish","type":"post","link":"https:\/\/www.mom-packaging.com\/en\/vinegar-filling-machine\/","title":{"rendered":"Vinegar filling machine"},"content":{"rendered":"

Why does vinegar filling present specific constraints?<\/h2>\n

Vinegar is an acidic food product whose corrosiveness is often underestimated in filling projects. Acetic acid, the main constituent of vinegar, behaves differently depending on the materials in contact and the product’s concentration.<\/p>\n

The corrosiveness of acetic acid on metals<\/h3>\n

Acetic acid progressively attacks metal surfaces in contact with the product. Grade 304 stainless steel (or 18\/10), commonly used in the food industry, withstands water and most food products well, but it is insufficient against concentrated acetic acid over the long term. 316L stainless steel<\/strong> (austenitic grade with molybdenum) is essential for all parts in direct contact with vinegar.<\/p>\n

A frequently overlooked point: parts located near the bottle neck<\/strong> without being in direct contact with the product are exposed to acetic vapours. These vapours are irritating to operators and corrosive to unprotected metal parts. Grade 304 components in this area degrade faster than expected.<\/p>\n

Acetic vapours<\/h3>\n

Acetic acid vapours are released during filling, particularly at high throughput and in confined spaces. They are irritating to operators’ respiratory systems and accelerate corrosion of surrounding equipment. Adequate ventilation of the production area is recommended for high-speed lines.<\/p>\n

The wide diversity of vinegars to fill<\/h3>\n

A single filler may handle vinegars with very different behaviours: very fluid and highly acidic white vinegar, semi-viscous and dense balsamic vinegar, flavoured vinegar containing herb or fruit fragments. Each reference may require a different nozzle and dosing technology.<\/p>\n

Legal metrology<\/h3>\n

Vinegar is a pre-packaged product subject to legal metrology requirements. The net mass or net volume stated on the packaging must correspond to the quantity actually contained in the product. MOM weight-based fillers hold a type-approval certificate for operation under legal metrology<\/a>.<\/p>\n

Traceability requirements<\/h3>\n

Quality-labelled vinegars (PGI, PDO), notably Modena balsamic vinegar, require strict batch-by-batch traceability. Unit-by-unit production tracking is available on MOM equipment.<\/p>\n

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What types of vinegar are there, and what are their filling constraints?<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
Vinegar type<\/th>\nAcidity<\/th>\nViscosity<\/th>\nFilling behaviour<\/th>\nMachine constraint<\/th>\n<\/tr>\n<\/thead>\n
White vinegar (spirit vinegar)<\/td>\n8\u201312%<\/td>\nVery fluid<\/td>\nHighly corrosive, strong vapours<\/td>\n316L stainless steel mandatory, ventilation, legal metrology<\/td>\n<\/tr>\n
Apple cider vinegar<\/td>\n5\u20137%<\/td>\nVery fluid<\/td>\nCorrosive, slightly coloured<\/td>\n316L stainless steel, anti-drip nozzle, legal metrology<\/td>\n<\/tr>\n
Red \/ white wine vinegar<\/td>\n6\u20138%<\/td>\nVery fluid<\/td>\nCorrosive, may contain sediment<\/td>\n316L stainless steel, weight-based dosing recommended<\/td>\n<\/tr>\n
Balsamic vinegar PGI<\/td>\n6%<\/td>\nSemi-viscous<\/td>\nDense, coloured, PGI traceability<\/td>\nWeight-based or constant-level dosing, 316L stainless steel<\/td>\n<\/tr>\n
Balsamic vinegar PDO (Modena)<\/td>\n\u2265 6%<\/td>\nViscous<\/td>\nVery dense, very coloured, very high value<\/td>\nHigh-precision weight-based dosing, mechanical piston, PDO traceability<\/td>\n<\/tr>\n
Flavoured vinegar (herbs, fruit)<\/td>\n5\u20138%<\/td>\nFluid with particles<\/td>\nSuspended particles<\/td>\nGasket flap nozzle, weight-based dosing<\/td>\n<\/tr>\n
Industrial spirit vinegar<\/td>\n8\u201314%<\/td>\nVery fluid<\/td>\nHighly corrosive, significant vapours<\/td>\n316L stainless steel or food-grade plastic, reinforced ventilation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

Which materials for a vinegar filling machine?<\/h2>\n

Material selection is the most important decision in a vinegar filling project. Standard 304 stainless steel equipment will degrade prematurely.<\/p>\n

316L stainless steel for all product-contact parts<\/h3>\n

316L stainless steel<\/strong> is the reference material for vinegar filling. Its molybdenum content gives it superior resistance to acetic acid and acidic environments in general. It is essential for all parts in direct contact with the product: tank, pipework, nozzles, pistons, flap valves.<\/p>\n

Watch out for grade 304 parts near the bottle neck<\/h3>\n

A point often overlooked during line design: parts located near the bottle neck, without being in direct contact with the product, are exposed to acetic vapours. If these parts are in grade 304 stainless steel, they degrade faster than product-contact parts. 316L stainless steel must be specified for all parts near the bottle neck<\/strong>, not only those in direct contact.<\/p>\n

Food-grade plastic: an alternative for the most exposed areas<\/h3>\n

Some manufacturers prefer food-grade plastic components<\/strong> (PEEK, food-grade POM) for the elements most exposed to vapours or for nozzles. These materials are inert to acetic acid and eliminate any corrosion risk. MOM can adapt product-contact parts according to customer preferences.<\/p>\n

Acid-resistant food-grade gaskets<\/h3>\n

Standard silicone or EPDM gaskets can be degraded by acetic acid over time. PTFE (Teflon) or acid-resistant food-grade EPDM gaskets<\/strong> are recommended depending on the vinegar’s concentration.<\/p>\n

ANIA certification<\/h3>\n

MOM provides ANIA food-grade compliance certificates<\/strong> with its machines to confirm the food-grade compliance of product-contact parts. Essential for fillers supplying major retailers and markets subject to quality audits.<\/p>\n

 <\/p>\n

Which dosing technology to choose?<\/h2>\n

Constant-level filling<\/h3>\n

Particularly suited to premium vinegars filled into transparent glass bottles<\/strong>. It guarantees a visually identical fill level across all packaging units in a given run, which is an essential criterion for products sold on retail shelves. As vinegar density is close to that of water, mass deviations remain limited for standard vinegars. For balsamic vinegars with a higher and more variable density, weight-based dosing is preferable.<\/p>\n

Weight-based dosing<\/h3>\n

Recommended as a first choice for applications subject to legal metrology, for balsamic vinegars (high and variable density), for flavoured vinegars containing particles, and for fillers handling multiple references on the same line. Weight-based dosing directly measures the mass delivered, regardless of product density.<\/p>\n

Volumetric dosing<\/h3>\n

Viable for standard vinegars (white, cider, wine) with a stable, well-controlled density. Less robust than weight-based dosing as soon as the range includes several references with different densities.<\/p>\n

Mechanical piston dosing<\/h3>\n

Reserved for highly viscous, high added-value PDO balsamic vinegars. The mechanical piston<\/a> guarantees the accuracy and robustness required for these exceptional products.<\/p>\n

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Which packaging formats for vinegar?<\/h2>\n