[Z]
Stainless Steel
Closed 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.

Front view of a 3200 L stainless steel Letina Z closed storage tank.

Back view of a 3200 L stainless steel Letina Z closed storage tank with a cooling jacket.

Front view of a large 20200 L stainless steel Letina Z closed storage tank.

A huge 100000 L stainless steel Letina Z closed storage tank loaded on the back of 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.

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.

Conical Eccentric Bottom

The closed tank comes with a conical eccentric press-molded bottom by default. Adjustments are made with the tank diameter, so the discharge is always easy.

Conical Eccentric Top

A press-molded eccentric conical top comes standard with all closed storage tanks. Adjustments are made in accordance with the stainless steel tank size and diameter.

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.

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)

Closed Tank Size Chart

Type	Capacity (L)	Capacity (US gal)	Diameter (mm)	Total Height (mm)	Shell Height (mm)	Bottom	Top
Z500A8	500	132	797	1611	1000	B1	T1
Z600A8	600	159	797	1861	1250	B1	T1
Z750A8	750	198	797	2111	1500	B1	T1
Z750A10	750	198	956	1622	1000	B1	T1
Z900A10	900	238	956	1872	1250	B1	T1
Z1000A8	1000	264	797	2611	2000	B1	T1
Z1040A10	1040	275	956	2022	1400	B1	T1
Z1100A10	1100	291	956	2122	1500	B1	T1
Z1250A8	1250	330	797	3111	2500	B1	T1
Z1250A11	1250	330	1116	1884	1250	B1	T1
Z1450A10	1450	383	956	2622	2000	B1	T1
Z1500A8	1500	396	797	3611	3000	B1	T1
Z1500A11	1500	396	1116	2134	1500	B1	T1
Z1800A10	1800	476	956	3122	2500	B1	T1
Z2000A11	2000	528	1116	2634	2000	B1	T1
Z2000A13	2000	528	1275	2245	1500	B1	T1
Z2150A10	2150	568	956	3622	3000	B1	T1
Z2400A14	2400	634	1402	2250	1500	B1	T1
Z2450A11	2450	647	1116	3134	2500	B1	T1
Z2600A13	2600	687	1275	2745	2000	B1	T1
Z2950A11	2950	779	1116	3634	3000	B1	T1
Z3200A14	3200	845	1402	2750	2000	B1	T1
Z3250A13	3250	859	1275	3245	2500	B1	T1
Z3900A13	3900	1030	1275	3745	3000	B1	T1
Z3950A11	3950	1044	1116	4634	4000	B1	T1
Z3950A14	3950	1044	1402	3250	2500	B1	T1
Z4150A16	4150	1096	1593	2764	2000	B1	T1
Z4700A14	4700	1242	1402	3750	3000	B1	T1
Z5000A18	5000	1321	1752	2775	2000	B1	T1
Z5100A16	5100	1347	1593	3264	2500	B1	T1
Z5150A13	5150	1361	1275	4745	4000	B1	T1
Z6000A19	6000	1585	1911	2938	2000	B2	T2
Z6100A16	6100	1612	1593	3764	3000	B1	T1
Z6200A18	6200	1638	1752	3275	2500	B1	T1
Z6250A14	6250	1651	1402	4750	4000	B1	T1
Z7450A18	7450	1968	1752	3775	3000	B1	T1
Z7450A19	7450	1968	1911	3438	2500	B2	T2
Z8100A16	8100	2140	1593	4764	4000	B1	T1
Z8750A21	8750	2312	2071	3455	2500	B3	T2
Z8850A19	8850	2338	1911	3938	3000	B2	T2
Z9850A18	9850	2602	1752	4775	4000	B1	T1
Z10100A16	10100	2668	1593	5764	5000	B1	T1
Z10200A22	10200	2695	2230	3473	2500	B3	T2
Z10400A21	10400	2748	2071	3955	3000	B3	T2
Z11700A19	11700	3091	1911	4938	4000	B2	T2
Z12200A18	12200	3223	1752	5775	5000	B1	T1
Z12200A22	12200	3223	2230	3973	3000	B3	T2
Z13800A21	13800	3646	2071	4955	4000	B3	T2
Z14600A19	14600	3857	1911	5938	5000	B2	T2
Z15300A25	15300	4042	2501	4002	3000	B3	T2
Z16100A22	16100	4254	2230	4973	4000	B3	T2
Z17100A21	17100	4518	2071	5955	5000	B3	T2
Z20000A22	20000	5284	2230	5973	5000	B3	T2
Z20200A25	20200	5337	2501	5002	4000	B3	T2
Z20500A21	20500	5416	2071	6955	6000	B3	T2
Z23900A22	23900	6314	2230	6973	6000	B3	T2
Z25100A25	25100	6631	2501	6002	5000	B3	T2
Z30000A25	30000	7926	2501	7002	6000	B3	T2
Z34900A25	34900	9221	2501	8002	7000	B3	T2
Z39800A25	39800	10515	2501	9002	8000	B3	T2

Can't find the ideal Closed Tank?

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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.

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