[Z]
Stainless Steel
Closed Tank

Stainless steel storage tank.
Stainless steel storage tank.

This stainless steel storage tank is one of the oldest models in Letina’s lineup. Tried and tested throughout the years, it has proven its versatility and value time and time again.

Thanks to constant design improvements, the closed tank got better over the years – just like the wine it’s designed to contain.

Whether you want a simple storage tank, a fermentation tank, something to age your product in or even a mixing vessel – this closed top tank can do it all.

A large, dimpled jacket makes sure the temperature inside the sealed tank is always optimal. Thanks to the vertical construction of the cooling jacket, the stored liquids will be efficiently chilled even if the closed tank is not full to the brim.

Durable, high-quality materials enable the storage tank to stay in pristine condition, even after years of professional usage.

Back view of a 3200 L stainless steel Letina Z closed storage tank with a cooling jacket.
Back view of a 3200 L stainless steel Letina Z closed storage tank with a cooling jacket.
Front view of a 3200 L stainless steel Letina Z closed storage tank.
Front view of a 3200 L stainless steel Letina Z closed storage tank.
Front view of a large 20200 L stainless steel Letina Z closed storage tank.
Front view of a large 20200 L stainless steel Letina Z closed storage tank.
Huge [Z] Closed storage tank by Letina (100 000 L) loaded on a truck.
Huge [Z] Closed storage tank by Letina (100 000 L) loaded on a truck.

AISI 304

The closed storage tank is made out of AISI 304 quality stainless steel. An upgrade to AISI 316L stainless steel is available for high-corrosion environments.
Microscopic structure of AISI 304 stainless steel.

Marbled Finish

A high-polish, marbled finish is applied to the outside of the closed tank. Matte and Scotch Brite finishes are also available upon request. The inside is BA (IIId) polished.
Depiction of a CP circle polish finish on stainless steel.

Conical Eccentric Bottom

The closed tank comes with a conical eccentric press-molded bottom by default. Large tanks come with a centered bottom to keep discharge easy.
[Bottom] Conical Eccentric - Press Molded

Conical Eccentric Top

A press-molded eccentric conical top comes standard with all closed storage tanks. Other head shapes are available upon request.
[Top] Conical Eccentric - Press Molded

Dimple Jacket

A dimple jacket is a thin, spotted shell that regulates tank temperatures with the help of a cooling/heating medium such as glycol. They are made of light-weight materials and spot-welded for minimal additional weight.

Stacking Technology

Make smart use of your limited cellar space by stacking tanks on top of each other. Stacking allows you to reorganize your production line and make it more efficient than ever.

Wheels*

This tank can be equipped with wheels, making it easier than ever to get into place. *Some size restrictions apply.

Forklift Skirt*

The tank can be equipped with 2 slots for a lifting fork that enables easy maneuvering around the cellar with a forklift. *Some size restrictions apply.

Closed Tank Equipment

Standard

  • Manhole Cover – Round Ø200 mm
  • Manway Door – Oval (type CL)
  • Legs – Standard (Closed)
  • Temperature Control
    • Cooling Jacket (0.5 m2/1000 L)
    • Thermometer (analog)
    • Thermowell (with PG9 fitting)
  • Valves
    • Sample Tap (DN15)
    • Partial Discharge – Ball valve (DN32 DIN11851)
    • Total Discharge – Ball valve (DN32 DIN11851)
    • Vent Valve – DN50 (PVC)
  • Level Indicator – Ø16 mm acrylic tube (scaled, open)
  • Type Plate – With note card
  • Ladder rack – Coat height 1500 mm onwards
  • Welding – Brushed finish

Options

  • Manhole Cover – Custom
  • Manway Door – Custom
  • Legs – Adjustable height and tilt
  • Temperature Control
    • Cooling/Heating Jacket (>0.5 m2/1000 L)
    • Cooling/Heating Plate (0.4 m2/1000 L)
    • Thermoregulator (digital)
  •  Valves
    • Ball or butterfly (Clamp, Garolla, WG, Macon, Gas, etc.)
    • Solenoid or electromotor valve
    • Stainless Steel Caps (on all valves and fittings)
  • Fittings
    • Inclined stirrer fitting
    • Inert gas fitting
  • Level Indicator – Ø24 mm acrylic tube (scaled, closed)
  • Decanter
  • Welding – Brushed and polished (Ra<0.8 µm)
Blueprint of the closed storage tank.

Closed Tank Size Chart

Scroll to explore the entire table.
TypeCapacity (L)Capacity (US gal)Diameter (mm)Total Height (mm)Shell Height (mm)BottomTop
Z500A850013279716111000B1T1
Z600A860015979718611250B1T1
Z750A875019879721111500B1T1
Z750A1075019895616221000B1T1
Z900A1090023895618721250B1T1
Z1000A8100026479726112000B1T1
Z1040A10104027595620221400B1T1
Z1100A10110029195621221500B1T1
Z1250A8125033079731112500B1T1
Z1250A111250330111618841250B1T1
Z1450A10145038395626222000B1T1
Z1500A8150039679736113000B1T1
Z1500A111500396111621341500B1T1
Z1800A10180047695631222500B1T1
Z2000A112000528111626342000B1T1
Z2000A132000528127522451500B1T1
Z2150A10215056895636223000B1T1
Z2400A142400634140222501500B1T1
Z2450A112450647111631342500B1T1
Z2600A132600687127527452000B1T1
Z2950A112950779111636343000B1T1
Z3200A143200845140227502000B1T1
Z3250A133250859127532452500B1T1
Z3900A1339001030127537453000B1T1
Z3950A1139501044111646344000B1T1
Z3950A1439501044140232502500B1T1
Z4150A1641501096159327642000B1T1
Z4700A1447001242140237503000B1T1
Z5000A1850001321175227752000B1T1
Z5100A1651001347159332642500B1T1
Z5150A1351501361127547454000B1T1
Z6000A1960001585191129382000B2T2
Z6100A1661001612159337643000B1T1
Z6200A1862001638175232752500B1T1
Z6250A1462501651140247504000B1T1
Z7450A1874501968175237753000B1T1
Z7450A1974501968191134382500B2T2
Z8100A1681002140159347644000B1T1
Z8750A2187502312207134552500B3T2
Z8850A1988502338191139383000B2T2
Z9850A1898502602175247754000B1T1
Z10100A16101002668159357645000B1T1
Z10200A22102002695223034732500B3T2
Z10400A21104002748207139553000B3T2
Z11700A19117003091191149384000B2T2
Z12200A18122003223175257755000B1T1
Z12200A22122003223223039733000B3T2
Z13800A21138003646207149554000B3T2
Z14600A19146003857191159385000B2T2
Z15300A25153004042250140023000B3T2
Z16100A22161004254223049734000B3T2
Z17100A21171004518207159555000B3T2
Z20000A22200005284223059735000B3T2
Z20200A25202005337250150024000B3T2
Z20500A21205005416207169556000B3T2
Z23900A22239006314223069736000B3T2
Z25100A25251006631250160025000B3T2
Z30000A25300007926250170026000B3T2
Z34900A25349009221250180027000B3T2
Z39800A253980010515250190028000B3T2

Can't find the ideal Closed Tank?

Talk to one of our engineers and describe your requirements. We will design a unique solution perfect for your processing needs.
Get a Custom Tank

Frequently Asked Questions

What is a closed tank?

A closed tank, also referred to as a sealed tank or closed top tank, is any fixed capacity storage vessel. The top of this type of tanks is sealed by welding it to the body, hence the name sealed tank.

The opposite to a closed tank is a variable capacity tank.

What can I store in the closed tank?

The closed tank is a completely sanitary vessel made out of AISI 304 stainless steel. It is suitable as a storage tank for a wide variety of liquids and foodstuffs. Wine, beer, liquor, dairy, confectionery, cosmetics, pharmaceuticals – even corrosive chemicals can be stored in the closed tank with an upgrade to AISI 316L stainless steel. 

Learn more about the different properties of AISI 304 and AISI 316 stainless steels.

What can I use the closed tank for?

The closed tank was initially designed for the wine industry and intended as a storage and fermentation vessel. Since then, it received many design upgrades. Now, the closed tank is suitable for storage, fermentation and mixing of any sanitary liquid or powder.

Ready to simplify your processing?

Let us help you. Describe your needs as best you can with the help of the form below. Our friendly staff will contact you with helpful suggestions and describe the next steps.

1) You order a tank.

You receive our quote and decide whether you want to change it. If you're satisfied, we move onto the design and engineering phase.

2) We design it.

You give us inputs based on the drawings we send you. It is an iterative process and we only stop when you're 100% satisfied.

3) You approve the plans.

You sign the final version of the drawing and email it to us. We then schedule the tank for manufacture. You still have some time for making small changes.

4) We manufacture it.

Your final tank design enters the production line. It is assembled from high-grade stainless steel using advanced welding techniques.

5) You take delivery.

Your tank is shipped out to you, including a manual and proper maintenance guide. We'll always be there for you to provide assistance.