Many buyers focus only on volume, cooling jackets, or pressure rating when choosing beer fermenters, but often overlook a critical detail: the manway (opening) design.
In fact, the opening type directly affects:Cleaning efficiency / Hygiene level / Pressure fermentation performance / Operational safety / Long-term maintenance costs.
This article explains the differences between top and side manways, and how to choose the right opening design for your fermenter.
The main purposes of a manway on a beer fermenter are:Internal inspection / Manual cleaning / Equipment maintenance / Dry hopping.
There are three common opening structures:Top manway / Side manway / Fully enclosed CIP design (no manway).
1. Top Manway Fermenter
Manway located on the top dish head of the tank.
Advantages:Lower manufacturing cost / Simple structure / Suitable for large-capacity tanks / Fewer welds on the sidewall.
Disadvantages:Requires work at height, higher safety requirements / Not ideal for frequent opening / Less convenient for manual cleaning / Pressure sealing depends on design quality.
Applications:Large industrial breweries / Bright beer tanks / Applications with infrequent access.
2. Side Manway Fermenter
Manway located on the cylindrical section, usually above the cone.
Advantages:Safer and more convenient operation / Easier internal inspection / Better for pressure fermentation / Ideal for dry hopping / Higher cleaning efficiency.
Disadvantages:Slightly higher cost / Higher requirements for welding and sanitary polishing.
Applications:Craft breweries / Small to medium brewing systems (5BBL–30BBL) / Breweries requiring frequent checks or fermentation adjustments.Most craft breweries worldwide use side-manway conical fermenters.
3. Fully Enclosed Fermenter (CIP Special Design)
Fully welded and sealed structure with no manway.
Advantages:Highest hygiene level / Minimal risk of human contamination / Suitable for automatic control systems / Stronger pressure resistance.
Disadvantages:No manual access / High dependence on CIP systems / Higher initial investment.
Applications:Large commercial breweries / High-volume automated production lines.
The manway design affects not only daily operation but also hygiene management and long-term operating costs.Choosing the right design improves brewing stability and reduces future maintenance risks.
As an experienced beer equipment manufacturer, Tonsen provides customized fermenter solutions for global markets (Europe, America, Australia, Southeast Asia), with full export documentation and certification support.
If you are planning a new brewery or upgrading your fermentation system, contact Tonsen for professional technical advice and complete brewing equipment solutions.