VEM-500 500L Vacuum Emulsifying Mixer
The VEM-500 vacuum emulsifying mixer is a multi-function system developed for producing stable emulsions, suspensions and high-viscosity pastes. Raw materials are heated and premixed in the water and oil pots, then drawn into the emulsifying pot by a vacuum pump. Inside the pot, a wall-scraping agitator keeps material moving to the wall while a high-shear rotor-stator homogenizer cuts particles down to 6 nm–2 µm. Because the pot works under vacuum, micro-bubbles produced during mixing are removed immediately, giving a smoother, more stable product.
Key Technical Parameters
Emulsifying Pot
Design volume 500 L; working capacity 400 L; three-layer SUS304/316L jacket; mirror-polished contact surface.
Homogenizer
Power 7.5 kW; speed 0–3000 rpm; high-shear rotor-stator; fineness 2– 6µm.
Scraper Agitator
Power 3 kW; speed 10–120 rpm (VFD); two-way wall scraping for high-viscosity pastes.
Vacuum & Heating
Vacuum ≤ -0.09 MPa; electric or steam heating; cooling via jacket.
Control
PLC + HMI touchscreen; auto control of vacuum, temperature, frequency and time.
Pre-mix Pots
Water pot 300 L design / 250 L; Oil pot 250 L design / 200 L; each 1.1 kW @ 1500 rpm.
Table 1 — Laboratory & Small Range VEM Specifications
| Specification | 5L | 10L | 30L | 50L | 100L | 150L |
|---|---|---|---|---|---|---|
| Emulsifying Pot — Design Volume (L) | 6 | 12 | 35 | 63 | 120 | 165 |
| Emulsifying Pot — Capacity (L) | 5 | 10 | 30 | 50 | 100 | 150 |
| Scraper Stirring Power (kW) | 0.18 | 0.18 | 0.75 | 0.75 | 1.1 | 1.1 |
| Scraper Stirring Speed (rpm) | 10 – 120 | |||||
| Homogenizing Power (kW) | 0.55 | 0.55 | 1.5 | 1.5 | 3 | 3 |
| Homogenizing Speed (rpm) | 3000 | |||||
| Water Pot — Design Volume (L) | 3 | 6 | 20 | 35 | 70 | 95 |
| Water Pot — Capacity (L) | 2.5 | 5 | 17 | 28 | 60 | 85 |
| Water Pot — Stirring Power (kW) | 0.015 | 0.015 | 0.18 | 0.37 | 0.55 | 0.55 |
| Water Pot — Stirring Speed (rpm) | 1500 | |||||
| Oil Pot — Design Volume (L) | 3 | 6 | 15 | 20 | 50 | 70 |
| Oil Pot — Capacity (L) | 2.5 | 5 | 13 | 22 | 40 | 65 |
| Oil Pot — Stirring Power (kW) | 0.015 | 0.015 | 0.18 | 0.37 | 0.55 | 0.55 |
| Oil Pot — Stirring Speed (rpm) | 1500 | |||||
★ 10L is the most popular laboratory model. The VEM series scales from 5 L lab units up to 1000 L industrial lines (see Table 2). All models share the same vacuum emulsifying & homogenizing principle.
Table 2 — Industrial Range VEM Specifications
| Specification | 250L | 350L | 500L (VEM-500) | 650L | 1000L |
|---|---|---|---|---|---|
| Emulsifying Pot — Design Volume (L) | 250 | 350 | 500 | 650 | 1000 |
| Emulsifying Pot — Capacity (L) | 200 | 280 | 400 | 520 | 800 |
| Scraper Stirring Power (kW) | 1.5 | 2.2 | 3 | 3 | 7.5 |
| Scraper Stirring Speed (rpm) | 10 – 120 | ||||
| Homogenizing Power (kW) | 4 | 5.5 | 7.5 | 7.5 | 11 |
| Homogenizing Speed (rpm) | 3000 | ||||
| Water Pot — Design Volume (L) | 130 | 170 | 300 | 400 | 600 |
| Water Pot — Capacity (L) | 100 | 130 | 250 | 320 | 480 |
| Water Pot — Stirring Power (kW) | 0.75 | 0.75 | 1.1 | 1.1 | 1.5 |
| Water Pot — Stirring Speed (rpm) | 1500 | ||||
| Oil Pot — Design Volume (L) | 130 | 200 | 250 | 300 | 500 |
| Oil Pot — Capacity (L) | 100 | 160 | 200 | 240 | 800* |
| Oil Pot — Stirring Power (kW) | 0.75 | 0.75 | 1.1 | 1.1 | 1.5 |
| Oil Pot — Stirring Speed (rpm) | 1500 | ||||
* The 1000 L oil-pot capacity figure (800 L) is taken from the source data as published; verify against the final engineering drawing before quotation. The VEM-500 highlighted row is the subject of this page: 500 L design / 400 L working emulsifying pot, 7.5 kW homogenizer, 3 kW scraper.
Structure & Components
How the Vacuum Emulsifying Process Works
Pre-mix: Raw materials are loaded into the water pot and oil pot, heated and stirred separately.
Vacuum transfer: A vacuum pump draws the pre-mixed phases into the emulsifying pot through pipelines — no manual pouring, less contamination.
Wall scraping: The two-way scraper agitator (10–120 rpm) continuously sweeps material from the jacket wall to the centre, creating a fresh interface.
High-shear homogenizing: The rotor-stator homogenizer (0–3000 rpm) cuts, impacts and shears the material in the narrow gap, reducing particles to 6 nm–2 µm.
Deaeration: Because the pot is under vacuum (≤ -0.09 MPa), bubbles generated during mixing are removed, improving fineness and stability.
Discharge: Product is discharged from the bottom valve or by transfer pump; the mirror-polished, GMP-compliant pot drains fully between batches.
Key Features
High & low shear in one vessel
Homogenizing and wall-scraping run together or separately for flexible recipes.
GMP hygienic design
SUS316L contact parts, mirror-polished, three-layer jacket, full drainage between batches.
Stable emulsion
Vacuum deaeration and high-shear mixing deliver a smooth, uniform, bubble-free product.
Versatile viscosity
Handles liquids up to ~80% total solids — creams, pastes, toothpaste, mayonnaise.
Auto control
PLC/HMI sets vacuum, temperature, frequency and time; optional steam or electric heating.
Customizable
Tank size, ports, heating method and control can be tailored to the line.
Applications
Cosmetics & Personal Care
Cream, lotion, serum, shampoo, body wash, facial cleanser, toothpaste & dental cream, sunscreen.
Food
Mayonnaise, salad dressing, peanut butter, sauce, honey, cheese, beverage emulsions.
Chemical & Pharmaceutical
Ointment, emulsion paint, coating, suspension, detergent, disinfectant.
Frequently Asked Questions
What is a vacuum emulsifying mixer used for?
A vacuum emulsifying mixer blends, homogenizes and emulsifies liquids, creams and high-viscosity pastes under vacuum. Typical products include cosmetic cream and lotion, toothpaste, mayonnaise, shampoo, ointments and industrial coatings.
What is the difference between a vacuum emulsifying mixer and a vacuum homogenizer mixer?
They describe the same machine family. "Vacuum homogenizer mixer" emphasizes the high-shear rotor-stator homogenizer (particle size 6 nm–2 µm); "vacuum emulsifying mixer" highlights the vacuum pot, wall-scraper and separate water/oil tanks. The VEM-500 combines both.
What material is in contact with the product in the VEM-500?
All product-contact surfaces use food/pharma-grade stainless steel — SUS316L for the contact layer, SUS304 for the other jacket layers — mirror-polished to GMP hygiene standards.
Can the VEM-500 handle toothpaste and other high-viscosity products?
Yes. The wall-scraping agitator (10–120 rpm, VFD) is built for high-viscosity pastes up to ~80% total solids, ideal for toothpaste, ointments and thick creams; the homogenizer dissolves insoluble powders quickly.
What are the homogenizing speed and vacuum level of the VEM-500?
The homogenizer runs 0–3000 rpm and the emulsifying pot works under vacuum up to -0.09 MPa, removing bubbles during mixing for better fineness and stability.
What is the lead time and can the VEM-500 be customized?
Standard delivery is 30–40 days. Tank geometry, heating method (electric/steam), PLC/HMI and extra ports can be customized to your production line.
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