1. What is Bag-on-Valve (BOV) technology?
Bag-on-Valve (BOV) is an innovative aerosol packaging technology. It involves filling the product into a flexible inner bag inside the can, with a propellant (such as compressed air or nitrogen) filling the space between the can and the inner bag. During use, the propellant pressure evenly dispenses the product from the inner bag, ensuring that the product never comes into contact with the propellant throughout the process. It is suitable for water-based aerosol products, such as water-based fire extinguishing agents, water-based spray paints, nasal sprays, deodorant sprays, olive oil sprays, and shaving gels.
BOV technology offers four key advantages:
Purity and Safety: The product is separated from the propellant, preventing contamination and oxidation. It does not require flammable gases such as propane or butane, making it more environmentally friendly.
Spray at Any Angle: The product continues to dispense even when the can is inverted, ensuring high utilization.
Precise and Controllable Spray Form: Dispensing is uniform and consistent, allowing for the production of various forms such as foam, gel, and spray.
Reusable: Some designs support multiple refills, reducing waste.
Wejing (Guangzhou Wejing Intelligent Equipment Co., Ltd.) is a professional manufacturer with over a decade of industry experience, specializing in aerosol filling machines, mixing equipment, and water treatment systems, and providing customized solutions ranging from individual machines to complete production lines. Below is a comprehensive purchasing guide for Wejing’s full range of BOV aerosol filling machines.
2. Quick Overview of the Full Range of Wejing BOV Aerosol Filling Machines
Model | Automated | Speed（CPM） | Filling volume | Compatible Containers | Compatible Valves | Benchmark for Ultra-High-Volume Production |
WJER-80 | Automatic | 70-80 | 30-500ml | Aluminum/Steel Cans | 1-inch BOV | Workhorse for High-Volume General Applications |
WJER-60 | Automatic | 45-60 | 30-500ml | Aluminum/Steel Cans | 1-inch BOV | Entry-Level Fully Automatic Model for Small to Medium Batches |
WJER-30S | Automatic | 20-30 | 30-500ml | Aluminum/Steel Cans | 1-inch BOV | Dual-Purpose for Plastic and Aluminum Bottles |
WJFZ-30S | Automatic | 20-30 | 10-500ml | Dual-Use (Plastic Bottles + Aluminum Cans) | 1-inch BOV | Dedicated to Plastic Bottles (External Gripper) |
WJERZ-30 | Automatic | 20-30 | 10-500ml | Plastic Bottles | 1-inch BOV | Basic, Economical Semi-Automatic Model |
WJER-300 | Semi-auto | 10-15 | 30-300ml | Aluminum/Steel Cans | 1-inch BOV | High-Capacity Semi-Automatic Model |
WJER-650 | Semi-auto | 10-15 | 30-650ml | Aluminum/Steel Cans | 1-inch BOV | Split-Type Model |
WJERS-300 | Semi-auto | 10-15 | 30-300ml | Aluminum/Steel Cans | 1-inch BOV | Dedicated Semi-Automatic Model for Plastic Bottles (External Gripper) |
WJERZ-300 | Semi-auto | 10-15 | 30-300ml | Plastic Bottles | 1-inch BOV | Dedicated to Very Small Volumes/20mm Pouch Valves |
WJERZC-150 | Semi-auto | 10-15 | 2-60ml | 20mm Valve Cans | 20mm BOV | Dedicated to Shaving Gel/Cream + Pentane |
WJHZ-350 | Semi-auto | 5-10 | 30–650 mL + 5–60 mL of pentane | Aluminum/Steel Cans | 1-inch BOV | Benchmark for Ultra-High-Volume Production |
3. Key Features of Each Model
(1) Fully Automatic High-Speed/High-Volume Series
·WJER-80: Designed for ultra-large-scale production; suitable for water-based aerosols; highest production capacity
·WJER-60: General-purpose high-volume model; supports water-based, oil-based, foam, and gel formulations
·WJER-30S: Entry-level model for small to medium batches; high cost-effectiveness; automatic height adjustment
·WJFZ-30S: Dual-purpose for plastic and aluminum bottles, with flexible switching
·WJERZ-30: Dedicated to plastic bottles, with external grip sealing to ensure reliable sealing
(2) Semi-Automatic Standard Series
·WJER-300: Basic, economical model, suitable for small-batch R&D and pilot production
·WJER-650: Semi-automatic high-capacity model, maximum filling volume 650ml
·WJERS-300: Featuring a modular design that facilitates layout, maintenance, and expansion.
·WJERZ-300: Semi-automatic, external grip sealing, for small/medium-batch plastic bottle aerosols
(4) Small-Volume & Specialized Models Series
·WJERZC-150: Precise small-dose filling (2–60 ml), high-value products / 20 mm valves
·WJHZ-350: Dedicated for shaving gels and foam products, automatic pentane mixing
4. uick Selection Decision Chart (by Application Scenario)
Your Requirements | Recommended Models | Reasons |
Limited budget, small-batch water-based products | WJER-300 | Most economical, meets your needs |
Single-can filling volume of approximately 5,000 ml | WJER-650 (Semi-automatic) / WJER-60 (Fully automatic) | Choose based on your budget |
High-value products filled at 2–10 ml per can | WJERZC-150 | The only model that supports filling starting from 2 ml |
Requires a modular design for easy layout or maintenance | WJERS-300 | Modular design, |
Production of shaving gel or foam gel | WJHZ-350 | The only dedicated model |
Automated production for small to medium batches (20–30 cans/min) | WJER-30S | High-value, fully automatic entry-level model |
High-volume, multi-product lines (45–60 cans/min) | WJER-60 | Highly versatile, fast |
Mass production (70–80 cans/min) | WJER-80 | The speed benchmark, maximizes production capacity |
Plastic bottle packaging, fully automatic | WJERZ-30 | Fully automatic model for plastic bottles |
Plastic bottle packaging, semi-automatic | WJERZ-300 | Semi-automatic model for plastic bottles |
Simultaneous production of plastic and aluminum bottles, requiring flexible switching | WJFZ-30S | Dual-purpose model, offers the greatest flexibility |
5. Purchasing Recommendations and After-Sales Service
(1) Pre-Purchase Checklist
① Estimated daily output (cans/day)
② Maximum filling capacity per can (ml)
③ Material characteristics (water-based/oil-based/paste/whether pentane is required)
④ Container material and type (aluminum cans/steel cans/plastic bottles)
⑤ Valve Type (1-inch or 20mm)
⑥ Dual-mode switching or multi-station integration
(2) After-Sales Service
① Free technical consultation, solution design, installation, and commissioning;
② Free replacement of spare parts for non-human-caused damage within the warranty period;
③ Operation manual + video tutorials + 2-year full-machine warranty;
④ OEM/ODM customization services.
6. Conclusion
Wejing’s Bag-on-Valve aerosol filling machine product line covers all application levels, from laboratory R&D and small-batch pilot production to large-scale industrial manufacturing. Of particular note are the WJERZ-30, WJERZ-300, and WJFZ-30S models developed specifically for plastic bottles, which provide comprehensive solutions for plastic bottle aerosol packaging. By clearly defining your product specifications, production capacity goals, and budget, and using the parameter comparison and model selection decision tables in this guide, you can quickly identify the most suitable machine or machines. For special requirements (such as customized production lines, non-standard containers, or special valve sizes), we recommend contacting us directly for further discussion.
