Mayonnaise looks simple on the shelf — a smooth, glossy, spoonable cream. But under the lid, it is one of the most demanding products in the food industry: an oil-in-water (O/W) emulsion in which oil can account for 65–80% of the total formula. Without the right mayonnaise making machine, that delicate structure breaks down into oil separation, grainy texture, short shelf life and rejected batches.

This guide walks you through how industrial mayonnaise production actually works, which equipment matters at each stage, and how to select a machine that matches your capacity, hygiene and budget requirements — based on more than 25 years of emulsification experience at Wuxi YeKeey Automation Technology Co., Ltd.

Why Mayonnaise Is So Hard to Make

Mayonnaise is a metastable emulsion: oil droplets dispersed in a water phase containing egg yolk, vinegar and seasonings. Three factors determine whether your product survives transport and shelf life:

1. Droplet size. For a stable, glossy mayonnaise, the oil droplets must be reduced to the micrometer range and tightly distributed. Weak shear leaves coarse droplets that coalesce and separate.

1. Air control. Air whipped into the batch causes oxidation, off-flavors, oversized fill weights and bacteria growth. Open-top mixers cannot remove it.

1. Viscosity management. Finished mayonnaise can reach tens of thousands of cP. As viscosity rises during emulsification, an underpowered mixer stalls before the batch is complete.

A standard single-shaft stirrer cannot solve all three problems at once. That is why serious producers move to a vacuum emulsifier for mayonnaise — a system that combines high-shear homogenization, vacuum deaeration and precise heating/cooling in one sealed vessel.

How a Mayonnaise Making Machine Works

A typical industrial mayonnaise production line built around a vacuum emulsifying machine includes:

• Water-phase and oil-phase preparation vessels — jacketed tanks where egg yolk, water, vinegar and seasonings (water phase) and liquid oil (oil phase) are pre-mixed and tempered at controlled temperatures.

• A vacuum emulsifying main vessel — the heart of the line. Oil and water phases are drawn into the main tank under vacuum, where a high-shear rotor–stator homogenizer breaks the oil into micro-droplets. On YeKeey’s ZJR series, the emulsification process reduces droplets to usually less than 1 µm, while the vacuum system holds up to −0.095 MPa to pull entrapped air out of the product.

• A scraper wall system — PTFE scrapers continuously sweep the jacketed wall, preventing mayonnaise from baking onto hot surfaces and ensuring uniform heat transfer during heating and cooling cycles.

• Heating and cooling jacket — steam or electric heating for phase preparation, and circulating water/glycol cooling to bring the finished batch down to filling temperature.

• Discharge and transfer — a sanitary screw pump or rotor pump moves the thick, finished mayonnaise to the filling line without destroying the emulsion structure.

Because the entire process runs in a closed, CIP-cleanable system, the product is never exposed to the workshop environment — a decisive advantage for food safety audits.

 

From Lab to Full Scale: The YeKeey Equipment Family

• ZJR-Lab (5–10 L) — benchtop vacuum emulsifier for recipe development and customer demos

• ZJR full-function series (30–2500 L) — the workhorse vacuum emulsifying machine: dual pre-mixing tanks, vacuum, heating/cooling, PLC or button control

• ZJR-Plus (new generation) — enhanced cleanliness with patented hygienic temperature sensors and an advanced gas-hydraulic lifting system

• MixCore MC-V / MC-H (30–2500 L) — bottom-homogenizer recirculation system engineered for high-viscosity food products like mayonnaise

• SP series vacuum processing units (650–6000 L) — internal/external loop homogenization for large-scale output

• LR high-shear homogenizer & colloid mill — auxiliary fine-milling for ultra-smooth textures and premix preparation

• Sanitary screw / rotor / centrifugal pumps — viscosity-matched product transfer

• Filling machines — soft tube and metallic tube filling & sealing machines to complete the line

Why Food Manufacturers Choose YeKeey

Founded in 1998 in Wuxi, China, YeKeey has spent over 25 years focused exclusively on mixing, homogenizing and emulsifying equipment:

• 50+ granted patents in vacuum homogenizing and emulsifying technology; recognized as a national “Specialized, Refined, Distinctive and Innovative” enterprise

• ISO9001 quality system, CE-certified machines; equipment exported to more than 70 countries, including the United States, Germany and Switzerland

• 100,000-level purification laboratory (built jointly with Jiangnan University) — free product testing with your own recipe before you buy

• Full in-house manufacturing: from design and welding to polishing and final inspection, with 100% quality checks on every unit

• Lifelong service: installation guidance, operational training and lifetime technical support

• A zero-carbon factory powered by its own 220 kWh solar-plus-storage system, for buyers with sustainability requirements