Tonne Open-top Fermenters
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Tonne Open-top Fermenters

 A tonne open-top fermenter is utilized for the fermentation process of red wine, offering unrestricted access to the cap and facilitating effortless submersion. The vessel's generously sloped base ensures a seamless and efficient removal of grape skins and seeds following fermentation.It provides unlimited access to cap and is easy to submerge the cap. The large sloped bottom enables a very easy and smooth discharge of skins and seeds after the fermentation.
  • OTF-Btm

  • SUS304/SUS316L

  • 500L - 10,000L, other volume can be customized


| Product Description 

The tonne open-top  fermenter is a vital component in wine production, serving as a critical catalyst that enables fermentation to unfold seamlessly.

This vessel stands out due to its unique design, which features an open top that permits ambient and yeast to move in and out freely while fermentation is taking place. This openness creates a natural setting for fermentation, allowing yeast to engage more efficiently with the fermenting material, leading to unique tastes and scents.

The product's longevity is guaranteed by the addition of sturdy angle steel reinforcements to its open top design.

2B finish open top fermentation vessel


oil brushed open top stainless steel fermenter

Oil Brushed

open top fermentation vessel

External Oil Brushed&Internal 2B



304 316 stainless steel open top fermentation vessel

1)Our open-top fermentation vessels are constructed from high-quality stainless steel alloys, featuring the superior properties of both AISI 304 and 316L materials.

customized open top fermentation vessel

2)The legs of the tank can be adjusted to fit different sizes of bins or presses positioned below the tank's discharge. Typically, the legs are taller than 800mm.

high qualityopen top stainless steel fermenter

3)Seamless curves connect the head and tube, as well as the pipe and tube, using butt welds without fillet welds. The welds are polished internally to allow for easy cleaning, removing any potential areas where dirt or bacteria could accumulate.

4)A dimple plate or cooling jacket is used to control temperature under high pressure of 400 kpa.

5)  A large, angled surface facilitates the smooth release of liquids and solids.

6)  The spacious rectangular manhole facilitates the emptying and cleaning of the tank interior in a straightforward manner.

7) Comprehensive tailoring options to accommodate unique needs and specifications.


 Data Sheet 


Standard Configuration

- Reinforced channel on the top 

- Large off-cone bottom 

- Legs with foot pads and levelling tubes 

- Thermo-regulation

  • Horizontal or vertical dimple jacket, 40% of area

  • Thermowell x1

- Valves

  • Racking outlet with ball valve

  • Drain outlet with butterfly valve

  • Sampler port 1' with valve

- Square/ round mandoor at bottom DN450 

- Ladder rack

Type Volume:HL dia.*barrel H(mm) Total H(mm) Jacket H & Quantity
FT-OT-1.5 15 Φ1330*1220 1570 600mm
FT-OT-2.0 20 Φ1850*1220   1570 600mm
FT-OT-2.5 25 Φ1600*1500 1850 1000mm
FT-OT-3.0 30 Φ1400*2000/
FT-OT-3.5 35 Φ1950*1770 2120 1000mm
FT-OT-4.0 40 Φ2200*1500 1850 1000mm
FT-OT-4.5 45 Φ2100*1500 1850 1000mm
FT-OT-5.0 50 Φ2100*1720 2070 1000mm
FT-OT-6.0 60 Φ2100*2000 2350 1220mm
FT-OT-7.0 70 Φ1950*3000 3350 1500mm
FT-OT-8.0 80 Φ2100*3200 3350 1500mm
FT-OT-9.0 90 Φ2150*3420 3770 2*1220mm
FT-OT-10 100 Φ2150*3750 4100 2*1220mm
FT-OT-12 120 Φ3000*1500  1850 1000mm
FT-OT-15 150 Φ2200*4000 4400 2*1220mm
FT-OT-20 200 Φ2200*5440 5840 2*1220mm

We provide turnkey engineering services,contact us with


 Product Structure 

open top fermentation tank structure(3)

| Certificate

Over 100 patents including utility,invrention and industrial design.

Pass through ISO certificates of  ISO9001/22000/ 45001, and other export certificates of  CE, PED, API650, AS1210, AS1692, CSA.


| Processing Machinery

Pretank use advanced processing machines to fabricate our stainless steel tanks,including auto Robbot welding machine,laser cutting/welding machine,CNC lathe,plasma cutting and automatic welding machines.

The machines replace labor working and minimize the human fault& tanks defects,improve tank quality, shorten construction period.

Processing Machinery

| About Company

Pretank is established in 1971, it's the largest-scale and longest-history stainless steel vessels manufacturer in China,with 4000 staff, 666,000 m㎡ floor space and US$240 million annual sales. We have the most advanced technology, R&D capability in the industry,adopt solidworks and AutoCAD to design vessels, Engaged in formulation of National Standard in designing, producing, inspection and transportation.

About us

53-Year History in Tank Fabrication

Prettech stainless steel tanks already used in 40 classifications,gather rich experiences and precipitate skills in varied industries,win 100,000 client’s trust

Guarantee Quality

- Ensure no leaks no rust, easy cleaning.
- All tanks are over engineered and heavy-duty made, lengthen tank service life.
- Stainless steel tanks produced by automatic and laser machines, reduce labor fault.
- Each tank is strictly tested and inspected before delivery.
- We pass through ISO certificates CE, PED, API650, AS1210, AS1692, CSA, supply 2-year warranty.

Competitive Price

Scale production and automatic machines reduce cost, Pretank always perseus the most reasonable price policy to share the profits with our consumers and distributors. With same quality our price are more strong competitive.

Customize Service Free of Charge
Our bespoke tanks are tailor-made for each project, considering material, strength calculations, dimensions, fittings, and ports.We listen carefully to your needs and provide humane designs.

Lifetime Engineering Service

At pretank family, you will get lifetime engineering service! Installation service on your site, making all the AutoCAD drawings for you, completely free parts replacement in the warranty date, low cost parts supplied out of the warranty, technology support door to door, lifetime consult support.


1.  Can you produce tanks with S.S.316L?

A: Yes we can, the wetted-parts are produced by S.S.316L to guarantee the corrosion resistance, the non-wetted parts are produced by S.S.304 to reduce cost.

2. What’s the lead time?

A: 35-50 working days depend on the order quantity.

3. How do you ship the goods?

A: We usually ship by sea in containers or flat rack.

4. Do you supply door to door shipping?

A: Yes we do, Pretank do ocean shipping, customs clearance, import procedures and deliver products to the appointed place.

5. What inspections will you do before delivery in your factory?

A: All tanks would be tested by static pressure test, dye penetration or X-ray test if requested.


Send Message

Provide stainless steel tanks solutions for liquid processing of STORAGE,FERMENTING, HEATING,CHILLING, BLENDING, DISTILLING, MASHING AND BOILING.




Tel: +86-519-85255001 
Cell: +86-15295029678 
Fax: +86-519-86713769 
Add: A-floor, 16,R&D HUB 2,Science and education Town, No.801,Changwu Middle Road,Wujin District, Changzhou, Jiangsu. P.C. 213000
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