new stefani: designed for the best. - petprom · for total solidity and the certainty of having a...

New Stefani: Designed for the best.

E N

2

Massimo Stefani, CEO

Great products forgreat customers.

3

Performance

Solidity

With the design of the new range of products, Stefani have reviewed their heat exchangers to obtain the highest thermodynamic perfor-mance. The geometries of the nned packs, the technology of the tubes and ns, the optimized ventilation: everything contributes to an exchange at the highest levels. The speci c performances in kW/lt and kW/Watt are at the peak of the market o er. Stefani’s results are obtained thanks to collaboration with prestigious companies, such as Wieland, Ziehl-Abegg and EBM-Papst, which test the components in their research centres, and with the con rmed guarantee of the TUV laboratories.

Those who use Stefani know that their heat exchangers are made with top quality materials and structures. With respect to the usual solutions on the market, our thicknesses are between 10% and 25% greater: for total solidity and the certainty of having a long-lasting and perform-ing product. Our heat exchangers are covered by a 3-year guarantee, so you can work with peace of mind.

5

43

150

3

68

14

53

16,000 9,000

15,000,000

our years of experience

our loyal customers

the years of guarantee of our products

our collaborators

the exchange geometry con gurations

the countries to which we export

the items despatched in one year the square metres of production site

our 2015 turnover in euros

6

Commercialrefrigeration

In preservation there are packed products, frozen products and In preservation there are packed products, frozen products and fresh products that breathe. There is a signi cant di erence in fresh products that breathe. There is a signi cant di erence in their needs. For fresh products we adopt solutions that maintain their needs. For fresh products we adopt solutions that maintain the organoleptic qualities of the breathing product unchanged the organoleptic qualities of the breathing product unchanged over time: temperature, humidity and an adequate number of re-over time: temperature, humidity and an adequate number of re-cycles in the cold rooms. Another aspect in which we are pro-cycles in the cold rooms. Another aspect in which we are pro-active is the adoption of technological solutions using natural active is the adoption of technological solutions using natural refrigerants such as COrefrigerants such as CO2 and glycol. and glycol.

Anyway, the greatest attention to energy saving. Anyway, the greatest attention to energy saving.

We know your needs.

7

Industrialrefrigeration:processing rooms

Industrialrefrigeration:blast chillers

In these applications, product refrigeration requires very varied solutions, depending on the speci c need of the process. Some require signi cant drying in the time unit, others the guarantee of less weight loss of the stored product. The cold could also re-quire alternate cycles or air circulation adequate for the presence of personnel or of the treated product. The process requirements for maturing, drying or smoking rooms, for cleanrooms or for pro-cessing rooms, di er a great deal in terms of material compatibil-ity and product sanitization.

For these applications, ventilated units are available with natural refrigerants such as glycol, CO, or synthetic refrig-erants of the latest generation.

The following are of fundamental importance in processes for rapid temperature reduction: correct air circulation, high residual static pressures and suitable speeds for fast freezing of the prod-uct. Large ice formations are managed with adequate surfaces and defrosting systems in electrical versions, with hot gas, hot glycol, or water. The construction solutions use large geometries and n spaces for large exchange surfaces.

Our distinctive feature is the customization of cooler con-struction to t them to the process layout with ventilated units generally using ammonia or CO.

8

Refrigerationfor logistics

Comfort andconditioning

Directly linked to the presence of large retail chains, refrigerated logistic centres are becoming more and more common. We are talking about normally large areas where goods transit for me-dium-short periods, whether they are fresh or frozen products. They are normally very large cold stores that require air distribu-tion with adequate air throw.

For these systems, solutions are available that reduce the space of the air cooling units in the cold store.

In conditioning applications, such as HVAC for large buildings, let us now consider the di erent aspects linked to heat dissipation:› ability to guarantee heat exchange performances with low ener-gy consumption and noise emission;› environmental compatibility of materials;› adequate machine layouts to adapt to narrow or limited spaces, or that must be hidden from view on roofs. In many cases, with dissipation dry coolers we obtain impor-tant energy saving thanks to free cooling. The adoption of heat exchange solutions with water spray systems allows a signi cant extension of operation in free cooling mode.

9

Processcooling

Coils forOEM applications

Process cooling may be of various types: industrial water cooling applications such as the cooling of moulds or electric panels, ra-diators for large motors or generating sets, cooling of auxiliaries such as pumps in oil&gas applications. In all cases we guarantee strong, reliable solutions that are easy to maintain.

We make customized nned packs for batch production, for our customers’ machines.

In particular for the following sectors: › data centres;› industrial air conditioning;› commercial air conditioning; › condensing units for refrigeration;› air treatment units for industrial refrigeration

10

Fabio Zoggia, Fabio Zoggia, Commercial DirectorCommercial Director

Knowledge is an advantage.

11

20dB(A) 110%

80%10%

The noiselevel duringoperationcan vary by

Capacity forspecifi c footprintkW/m² can be increased by

The dehumidifi cation can vary up to

High-effi ciency heat exchangers allow system running costs to be reduced by

12

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%[W/kW DT1–8°C]

5050 5025 5050 5025 5025

10%

50%

60%

70%

80%

90%

100%

110%

5050 5025 5050 5025 5025

[kW DT1–8°C]

3026 3026 3026 3026 2522 2522 80%

100%

120%

140%

160%

180%

200%[kW/lt DT1–10°C]

0%

20%

40%

60%

80%

3026 3026 3026 3026

100%[kW DT1–10°C]

2522 2522

1

2

43

High-e ciency heat exchangers, with tube and n geometry for high performances, allow system running costs to be reduced by

To maintain the same refrigeration capacity with the system, the variations in performance due to the choice of the coil con guration of the heat exchangers are transformed into variations of ΔT. For example, a variation in performance of +25% on the evaporator side and +10% on the condenser side would result in a variation of consumption in the compressor of -8.5% with respect to what would theoretically be indicated by Carnot’s theorem, including the e ciencies introduced by the compressor and by the expansion valve. If we add to this the e ciencies that can be obtained by the ventilation of heat exchangers, in terms of W/kW, which are assumed to account for 20% of consumption in the system, we could indicatively nd a realistic optimization of system e ciency of 10%, depending on the choice of the heat exchanger coil con guration with the same ventilation.

The reduction of running costs is an important factor in system design-ing, and heat exchangers are important components to achieve the best results. The performance coe cient, expressed as the ratio between refriger-ation capacity and energy input, is a function of the condensation and evapora-tion temperatures and of the e ciency of the compressor and the expansion. These technical and quality considerations on the possible economic savings must be applied to the speci c working conditions of the systems. We know that heat exchange performances, with the same ventilation, number of tubes in the coil and n pitch, depend on the exchange geometries of the coils, which may have waved or louvered ns, in a con guration with smooth or rippled tubes.

If we consider some practical cases, for evaporators the 50x50 geome-try o ers a secondary surface double that of 50x25, so with more materi-als and an higher exchange capacity. In terms of €/kW these two solutions are substantially the same and at quality level the version with waved ns has sig-ni cant declines in performance. For reference purposes, in the version with non-specialized exchange surfaces, it is important to have performing ripple tube technology which are di erent for condensation or evaporation working conditions.

For the condenser, the solution with a smaller rippled tube is the winner as regards quantity of materials, and therefore competitiveness. The 3026 3/8 con guration, thanks to the high secondary/primary surface ratio, on the one hand allows air ows and temperature DT that increase exchange, and on the other reduces the refrigerant charge, to obtain very competitive perfor-mances. The signi cant value concerns the decline due to the use of non-lou-vered ns, which is always considerable.

EVAPORATION PERFORMANCES

DEFROSTING CONSUMPTION

REFRIGERANT CHARGESCONDENSATION PERFORMANCESLEGEND

RIPPLED TUBE

SMOOTH TUBE

LOUVERED FINS

WAVED FINS

1

3

2

4

12

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%[W/kW DT1–8°C]

5050 5025 5050 5025 5025

10%

50%

60%

70%

80%

90%

100%

110%

5050 5025 5050 5025 5025

[kW DT1–8°C]

3026 30263026 3026 2522 252280%

100%

120%

140%

160%

180%

200%[kW/lt DT1–10°C]

0%

20%

40%

60%

80%

3026 30263026 3026

100%[kW DT1–10°C]

2522 2522

1

2

43

High-e ciency heat exchangers, with tube and n geometry for high performances, allowsystem running costs to be reduced by

To maintain the same refrigeration capacity with the system, the variations in performance due to the choice of the coil con guration of the heat exchangers are transformed into variations of ΔT. For example, a variation in performance of +25% on the evaporator side and +10% on the condenser side would result in a variation of consumption in the compressor of -8.5% with respect to what would theoretically be indicated by Carnot’s theorem, including the e ciencies introduced by the compressor and by the expansion valve. If we add to this the e ciencies that can be obtained by the ventilation of heat exchangers, in terms of W/kW, which are assumed to account for 20% of consumption in the system,we could indicatively nd a realistic optimization of system e ciency of 10%, depending on the choice of the heat exchanger coil con guration with the same ventilation.

The reduction of running costs is an important factor in system design-ing, and heat exchangers are important components to achieve the best results. The performance coe cient, expressed as the ratio between refriger-ation capacity and energy input, is a function of the condensation and evapora-tion temperatures and of the e ciency of the compressor and the expansion. These technical and quality considerations on the possible economic savings must be applied to the speci c working conditions of the systems. We know that heat exchange performances, with the same ventilation, number of tubes in the coil and n pitch, depend on the exchange geometries of the coils, which may have waved or louvered ns, in a con guration with smooth or rippled tubes.

If we consider some practical cases, for evaporators the 50x50 geome-try o ers a secondary surface double that of 50x25, so with more materi-als and an higher exchange capacity. In terms of €/kW these two solutions are substantially the same and at quality level the version with waved ns has sig-ni cant declines in performance. For reference purposes, in the version with non-specialized exchange surfaces, it is important to have performing ripple tube technology which are di erent for condensation or evaporation working conditions.

For the condenser, the solution with a smaller rippled tube is the winner as regards quantity of materials, and therefore competitiveness. The 30263/8 con guration, thanks to the high secondary/primary surface ratio, on the one hand allows air ows and temperature DT that increase exchange, and on the other reduces the refrigerant charge, to obtain very competitive perfor-mances. The signi cant value concerns the decline due to the use of non-lou-vered ns, which is always considerable.

EVAPORATION PERFORMANCES

DEFROSTING CONSUMPTION

REFRIGERANT CHARGESCONDENSATION PERFORMANCESLEGEND

RIPPLED TUBE

SMOOTH TUBE

LOUVERED FINS

WAVED FINS

1

3

2

4

13

[Deh

umid

ifca

tio

n lt

/h D

T1-

8°C

]

90%

95%

100%

110%

115%

GRECALE50X50

–50X50

BOREA50X25

–50X25

105%

120%

0%4 5 6 7 8

60%DT12

DT10

DT8

DT6

120%

[Deh

umid

ifca

tio

n]

[Fins Space]

[Deh

umid

ifca

tio

n]

[R.H. in cold stores]

0%80% 85% 90% 95% 100%

60%

120%

DT8

80%1

2

3

Depending on the working conditions,the same air cooler can vary itsdehumidi cation capability up to

In the food cooling and preservation process, one of the parameters to be considered in designing heat exchangers is linked to drying. In an evaporator, this parameter is especially linked to the temperature dif-ferential between the cooling uid and the cold store temperature and to the characteristics of the machines, such as the secondary exchange surface. The graphs below indicate the variation of dehumidi cation calcu-lated in lt/h according to the working conditions.

It is useful to say that the refrigeration capacity of evaporators in real working conditions includes a latent heat contribution that increases according to the temperature and humidity of the cold room. In our experience, the latent pow-er contribution varies according to the temperature and humidity of the cold room with the indicative parameters shown in the table:

Below is a graph applied to the GRECALE and BOREA series that, with the same ventilation and number of tubes in the coil, due to the e ect of di erent geometries and types of ns, express di erent drying levels to main-tain the same real heat exchange performances in the cold room.

Cold room temperature °C R.H. DT1 Latent contribution 10.0 85% 10 35% 0.0 85% 8 20% –18.0 95% 7 5% –25.0 95% 6 0%

1 2

3

13

[Deh

umid

ifca

tio

n lt

/h D

T1-

8°C

]

90%

95%

100%

110%

115%

GRECALE50X50

–50X50

BOREA50X25

–50X25

105%

120%

0%4 5 6 7 8

60%DT12

DT10

DT8

DT6DT6

120%

[Deh

umid

ifca

tio

n]

[Fins Space]

[Deh

umid

ifca

tio

n]

[R.H. in cold stores]

0%80% 85% 90% 95% 100%

60%

120%

DT8DT8

80%1

2

3

Depending on the working conditions,the same air cooler can vary itsdehumidi cation capability up to

In the food cooling and preservation process, one of the parameters tobe considered in designing heat exchangers is linked to drying. In an evaporator, this parameter is especially linked to the temperature dif-ferential between the cooling uid and the cold store temperature andfto the characteristics of the machines, such as the secondary exchangetsurface. The graphs below indicate the variation of dehumidi cation calcu-lated in lt/h according to the working conditions.

It is useful to say that the refrigeration capacity of evaporators in real working conditions includes a latent heat contribution that increases according to the temperature and humidity of the cold room. In our experience, the latent pow-ter contribution varies according to the temperature and humidity of the cold room with the indicative parameters shown in the table:

Below is a graph applied to the GRECALE and BOREA series that, with the same ventilation and number of tubes in the coil,t due to the e ect of di erent geometries and types of ns, express di erent drying levels to main-tain the same real heat exchange performances in the cold room.t

Cold room temperature °C R.H. DT1 Latent contribution10.0 85% 10 35%

0.0 85% 8 20%–18.0 95% 7 5%–25.0 95% 6 0%

1 2

3

14

80%

100%

120%

140%

160%

180%

200%

220%

SCIROCCO–

h 1.6 mt

SCIROCCOL

h 1.6 mt

GHIBLIXL

h 1.6 mt

ZONDAS

h 1.2 mt

ZONDA–

h 1.2 mt

ZONDAL

h 1.6 mt

OSTRO–

h 2.4 mt

OSTROL

h 2.7 mt

[cap

acit

y d

ensi

ty in

dex

kW

/m2 ]

SCIROCCO ZONDA OSTRO

0%2x800

AC950 rpm

2x800AC

650 rpm

2x800EC

650 rpm

2x800EC

950 rpm

2x800EC

450 rpm

50%

100% 0

-20

-10

[per

form

ance

ind

ex]

[no

ise

red

ucti

on]

ASS. WATT

KW

var dB(A)var dB(A)

110%

20 dB(A)

14

80%

100%

120%

140%

160%

180%

200%

220%

–h 1.6 mt

Lh 1.6 mt

XLh 1.6 mt

Sh 1.2 mt

–h 1.2 mt

Lh 1.6 mt

–h 2.4 mt

Lh 2.7 mt

[cap

acit

y d

ensi

ty in

dex

kW

/m2 ]

SCIROCCO ZONDA OSTRO

0%2x800

AC950 rpm

2x800AC

650 rpm

2x800EC

650 rpm

2x800EC

950 rpm

2x800EC

450 rpm

50%

100% 0

-20

-10

[per

form

ance

ind

ex]

[no

ise

red

ucti

on]

ASS. WATTAASS WA

KWK

var dB(A)var dB(A)

110%

20 dB(A)

Depending on the type of machine used for heat dissipation, the capacity for speci c footprint kW/m² can be increased by

In residential applications, the use of electronic motors allows the reduction of noise levels between day and night operation by

For those applications in which spaces are limited and the heat to be dissipated at the condenser or at the liquid cooler is signi cant, various possible machine con gurations can be considered, which in the same working and noise conditions o er di erent power in-dices speci c for the machine footprint in kW/m².

The graph shows the performances expressed by the va-rious con gurations in operating conditions of the liquid cooler tted with the same ventilation and number of rows in the coil.

Thanks to the use of silencers, the capacity densities can improve by a further 15% (cylinders shown above the per-formance bars); h indicates the height of the machines.

If we take a condenser in catalogue conditions as reference, we nd that the adoption of EC motors al-lows the reduction of consumption and particularly of the noise level.

If we compare a condenser with AC motors with the same machine equipped with EC motors, the electric absorp-tion already shows an advantage in standard working conditions (6poles ~ 950rpm) and has signi cant re-ductions of noise and consumption in silent operating mode (450rpm).

To reduce the noise level, accessories are also avai-lable that allow the perceived e ect of the sound pressure Lp to be halved, -3 dB(A) thanks to the use of silencers tted on the ventilated units.

1515

Values suggested for the preservation of fruit and vegetables in di erent cold stores:

Fruit °C U.R%Apricots 0 90Oranges (r.o.v.) 0 ÷ 4 85 ÷ 90Cherries 0 90 ÷ 95Fresh dates 0 85Strawberries 0 90 ÷ 95Kiwis -0,5 90 ÷ 95Raspberries 0 90 ÷ 95Lemons 0 ÷ 4,5 85 ÷ 90Apples (r.o.v.) 0 ÷ 4 90 ÷ 95Coconuts 0 80 ÷ 90Pears (r.o.v.) 0 90 ÷ 95Peaches 0 90Plums 0 90 ÷ 95Grapes (r.o.v.) -1 ÷ 0 90 ÷ 95

Fruit °C U.R%Pineapple (ripe) 7 ÷ 8 90Pineapple (green) 10 ÷ 13 85 ÷ 90Avocados 7 ÷ 12 85 ÷ 90Bananas (ripe) 13 ÷ 16 85 ÷ 90Bananas (green) 12 ÷ 13 85 ÷ 90Limes 8,5 ÷ 10 85 ÷ 90Green lemons (r.o.v.) 10 ÷ 14 85 ÷ 90Mangoes (r.o.v.) 7 ÷ 12 90Melons (r.o.v.) 7 ÷ 10 85 ÷ 90Guavas 8 ÷ 10 90Grapefruits 10 10

Vegetables °C U.R%Cucumbers (r.o.v.) 9 ÷ 12 95Okra 7,5 ÷ 10 90 ÷ 95Aubergines 7 ÷ 10 90 ÷ 95Sweet potatoes 13 ÷ 16 85 ÷ 90Sweet peppers 7 ÷ 10 90 ÷ 95Ripe tomatoes 8 ÷ 10 85 ÷ 90Green tomatoes 12 ÷ 13 85 ÷ 90Vegetables in brine 13 90 ÷ 95Ginger 13 65Pumpkins 10 ÷ 13 50 ÷ 75

Cheeses °C U.R%Emmenthal 10 ÷ 12Gruyère 10 ÷ 12Dutch 12 ÷ 15

Animal products °C U.R%Various meat -1,5 ÷ 0 85 ÷ 90Lamb -1,5 ÷ 0 85 ÷ 90Bacon 4 85 ÷ 90Butter 0 ÷ 4Meat -1,5 ÷ 0 85 ÷ 90Pork -1,5 ÷ 0 85 ÷ 95Minced meat 4 85 ÷ 90Cephalopods 0Cream -2 ÷ 0Shell sh 0Cheeses: 5Fresh (r.c.) 0 ÷ 2 85 ÷ 90Lard -1 ÷ 0Full-cream milk 0 ÷ 4Pasteurized milk 4 ÷ 6Compact cheese (r.c.) 0 ÷ 5 80 ÷ 85hard cheese (r.c.) -1 ÷ 1 70 ÷ 75Soft cheese (r.c.) 0 ÷ 5 85 ÷ 90Fish (r.c.) 0Gutted chickens -1 ÷ 0 85 ÷ 90Non-gutted chickens 0 60 ÷ 70Eggs with shell -1 ÷ 0 90Veal -1,5 ÷ 0 85 ÷ 90Yogurt 2 ÷ 5

Vegetables °C U.R%Garlic 0 65 ÷ 70Asparagus 0 ÷ 2 95Artichokes 0 95Carrots without leaves 0 95Cauli owers 0 95Cabbages 0 95Brussels sprouts 0 90 ÷ 95Dried onions 0 65 ÷ 70Mushrooms 0 90 ÷ 95Lettuces 0 95Sweetcorn 0 95Potatoes (for seed) 2 ÷ 3 90 ÷ 95Peas in pod 0 95Leeks 0 95Turnips 0 95Radishes 0 90 ÷ 95Celery 0 95Spinach 0 95

PRODUCTS NOT SENSITIVE OR SLIGHTLY SENSITIVE TO COLD

Fruit °C U.R%Water melons 5 ÷ 10 85 ÷ 90Mandarins 4 ÷ 6 85 ÷ 90Mangosteens 4 ÷ 5 85 ÷ 90

Vegetables °C U.R%Green beans 7 ÷ 8 92 ÷ 95Potatoes for consumption 4 ÷ 6 90 ÷ 95Potatoes for industry 7 ÷ 10 90 ÷ 95

PRODUCTS QUITE SENSITIVE TO COLD

PRODUCTS VERY SENSITIVE TO COLD

R.H.% = relative humidity r.o.v. = relating to origin and variety r.c. = relating to class

Sour

ce: a

rticle

“Col

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main

tena

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pub

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d by

Cen

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16

In the productive heart of heat transfer technology

17

CastegneroMilan

Vicenza Venice

SELECT THE CODE TO VIEW THE POSITIONON GOOGLE MAPS

18

ø250÷500 1÷60 kW 4÷7.5 mm5 AVAILABLE FANS SIZE5 AVAILABLE FANS SIZE CAPACITY DT1 8°CCAPACITY DT1 8°C 5 FINS SPACE AVAILABLE5 FINS SPACE AVAILABLE

ø250÷450

ø250÷315

2÷60 kW

1÷10 kW

3÷7 mm

3÷7 mm

4 AVAILABLE FANS SIZE4 AVAILABLE FANS SIZE


CAPACITY DT1 8°CCAPACITY DT1 8°C


3 FINS SPACE AVAILABLE3 FINS SPACE AVAILABLE


BOREA Commercial air coolers

ZEFIRO Commercial air coolers

BREEZE Commercial air coolers

All the productsyou need.

ø500÷710

ø500÷630

ø710÷900

ø350÷630

ø10”÷28”

20÷200 kW

20÷120 kW

50÷300 kW

4÷250 kW

15÷200 kW

4÷12 mm

4÷12 mm

6÷12 mm

6÷12 mm

4÷8 mm






POWER DT1 8°CPOWER DT1 8°C










19

GRECALE Industrial air coolers

MAESTRO Industrial air coolers

BLIZZARD Industrial blast chillers

BURAN Industrial blast chillers

WILLY Centrifugal industrial air coolers

20

ø350÷990

ø800÷910

ø800÷990

ø12”÷18”

5÷1300 kW

20÷1000 kW

200÷2000 kW

20÷120 kW

1÷16

1÷6

4÷18

1÷4









NUMBER OF FANSNUMBER OF FANS




ZONDA Air cooled condenser and dry coolers

SCIROCCO Air cooled condenser and dry coolers

OSTRO Air cooled condenser and dry coolers

GARBIN Centrifugal condensers and dry coolers

22

RANG

EM

ODE

LN°

FAN

Ø FA

NFI

N SP

ACE

MED

IUM

DEFR

OST

CONF

IGUR

ATIO

NS

n°n°

mm

mm

SYNTETIC

CO2 45BAR

BRINE

STANDARD ELECTRIC

HOT GAS

WATER

FAN NOZZLE DEFROST

DRAIN HEATER

POST HEATING

PRE PAINTEDFINS

COIL CATHODE TREATMENT

INOX CASING

INSULATED DRAY TRAY

EASY ACCESS

EC FANS

ELECTRICWIRING

AIR STREAMER

FAN TEXTILE CLOSURE

BO

REA

25

321

÷ 4

250

4.0 | 5

.5 | 6

.5 | 7

.5

BO

REA

31

321

÷ 4

315

4.0 | 5

.5 | 6

.5 | 7

.5

BO

REA

35

321

÷ 4

350

4.0 | 5

.5 | 6

.5 | 7

.5

BO

REA

45

481

÷ 4

450

4.0 | 5

.5 | 6

.5 | 7

.5

BO

REA

50

481

÷ 4

500

4.0 | 5

.5 | 6

.5 | 7

.5

ZEF

IRO

25

181

÷ 3

250

3.0 | 4

.5 | 7

.0

ZEF

IRO

31

241

÷ 4

350

3.0 | 4

.5 | 7

.0

ZEF

IRO

35

241

÷ 4

350

3.0 | 4

.5 | 7

.0

ZEF

IRO

45

361

÷ 4

450

3.0 | 4

.5 | 7

.0

BRE

EZE

25

91

÷ 3

250

3.0 | 4

.5 | 7

.0

BRE

EZE

31

91

÷ 3

315

3.0 | 4

.5 | 7

.0

288

TOTA

L CO

MM

ERCI

AL C

OO

LER

MO

DELS

Com

mer

cial

coo

lers

Stan

dard

acce

ssor

yOp

tiona

l acc

esso

ry

CONFIGURATIONS

23

Indu

stri

al c

oole

rsRA

NGE

MO

DEL

N° FA

NØ

FAN

FIN

SPAC

EM

EDIU

MDE

FRO

STCO

NFIG

URAT

IONS

n°n°

mm

mm

SYNTETIC

CO2 45BAR

BRINE

NH3

STANDARD ELECTRIC

LIGHT ELECTRIC

HOT GAS

WATER

HOT GLYCOLE

FAN NOZZLE DEFROST

DRAIN HEATER

POST HEATING

PRE PAINTEDFINS


INOX CASING

INSULATED DRAY TRAY

EASY ACCESS

EC FANS

ELECTRICWIRING

SWTICHESWIRED

AIRSTREAMER

FAN TEXTILECLOSURE

KIT LEG

AIR THROWCOWL

GRE

CALE

50

751

÷ 5

500

4 | 6

| 8 | 1

0 | 1

2

GRE

CALE

56

751

÷ 5

560

4 | 6

| 8 | 1

0 | 1

2

GRE

CALE

63

751

÷ 5

630

4 | 6

| 8 | 1

0 | 1

2

GRE

CALE

71

751

÷ 5

710

4 | 6

| 8 | 1

0 | 1

2

MAE

STRO

50

361

÷ 4

500

4 | 6

| 8

MAE

STRO

63

361

÷ 4

630

4 | 6

| 8

WIL

LY 1

0 18

1 ÷

210

in4

| 6 | 8

WIL

LY 1

2 18

1 ÷

212

in4

| 6 | 8

WIL

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5 18

1 ÷

215

in4

| 6 | 8

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8 18

1 ÷

218

in4

| 6 | 8

WIL

LY 2

5 18

1 ÷

225

in4

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WIL

LY 2

8 18

1 ÷

228

in4

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891

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1 ÷

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421

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26

Great products for great customers.

27

1 32

Italy Melinda, one of the main fruit growing consortiums in Trentino, has launched a very interesting experimental project for reducing the environmental impact, thanks to the exploitation of natural en-vironments that also o er energy sa-ving and a better conservation of the organoleptic qualities of apples. The use of fteen kilometres of tunnels hol-lowed out of the rock in the cellar of Rio Grande at Mollaro in Val di Non, for the construction of refrigerated cold stores created completely in an underground environment. Thanks to precious colla-boration with the Longofrigo company, Stefani suggest SGIN industrial air co-olers with propylene glycol, speci cally designed for this application, able to guarantee an appropriate temperature of the storage chamber with a reduced di erence between the temperature of the heat transfer uid and the air tem-perature.

Germany Hamburg Banana conservation system with 24 single- oor and double- oor cold sto-res. Machines dedicated to this parti-cular application to guarantee the maxi-mum uniformity of air distribution and of product temperature. The coolers are made to satisfy the classic necessities of cold room dimension and brightness required by these particular applica-tions. The heat exchange packs are op-timized for minimum drying, in order to maintain the product quality standards.

Italy Trentino South Tyrol Cooling system for pre-processing ro-oms and for loading/unloading apples, of about 2000m². 6 air coolers are in-stalled, equipped with centrifugal fans for distributing the air by means of tex-tile channels. This solution guarantees suitable working conditions for a large presence of personnel engaged in con-tinuous handling of goods. The wide choice of centrifugal ventilation, with optimization of the air plenum on the coils, o ers very e cient and versatile solutions for applications of this type.

28

5

7

4

6

Italy, LatinaFruit and Vegetable Market with industrial air coolers – from 35 to 75kW cooling power – with a stainless steel coil and water de-frosting, which o er adequate performances and high reliability. The generous exchange surfaces allow the air/ uid temperatu-re di erence to be limited, avoiding drying and the consequent loss of weight of the stored fruit and vegetables.

Italy,Reggio EmiliaProcessing room for a dairy equipped with cooling units with centrifugal ventilation. The evaporator has a stainless steel ca-sing and a coil with stainless steel tubes and pre-painted ns. All this allows high resistance to the detergents used by the custo-mer for sanitizing the premises.

Greece, AthensCommercial sales point of the Metro Cash&Carry chain. Com-mercial dual ow evaporators are installed for cooling the areas open to the public. To satisfy the demand for a low air speed and limited noise, units with low-speed fans are installed. Cubic and dual ow evaporators of the industrial series are supplied on the site for cold stores and refrigerated areas for loading and unloading goods.

Russia Saint Petersburg Large logistic hub divided into several parts with several inde-pendent refrigerating units. In combination with the refrigerating units for indoor installation, table condensers are supplied with vertical installation, equipped with electronic ventilation for low environmental temperatures, typical of the geographic area.

29

9

11

8

10

Denmark CopenhagenFree cooling conditioning system for a hospital centre. 8 atbed units are installed with an electronic motor of the latest genera-tion - low-speed - to satisfy the strict regulations on noise pro-duction, required by nearness to the hospital and to adjacent residences. The machines are stacked in a vertical con gura-tion, to combine the demand for power with the small amount of space available for installation.

Norway The client for this project is the Norwegian construction com-pany Klima Og Bygg AS, specialized in building activities, in the installation of heating, conditioning, ventilation and refrigeration systems. The solution conceived is a line of low dry coolers, equipped with coils mounted in a “V” shape. This product range allows an extremely low height, with respect to the high installed capacity, to ensure minimum visual impact.

NorwayConditioning system for a data centre, made entirely under-ground to reduce to a minimum the environmental impact of the building in a wooded location. Solution designed to respond to the innovation demands of the project, which requires low ener-gy consumption overall. There are 12 dry coolers in a V shape design to reduce dimension impact and have mainly free-cooling operation. The dry coolers are equipped with a speed regulating system.

Poland Conditioning system with small chillers combined with a atbed condenser of the commercial series with low noise fan. This condenser o ers the typical advantages of the industrial range that adopts high nozzles, in this case with 630 diameter fans. The combination of this ventilation with a super-compact nned pack o ers a technologically advanced refrigerant charge.

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The pleasure of doing business together.

31

A companyat your service Stefani lies at the heart of Italian refrigeration and air conditioning, a company that appreciates the values of its homeland: work, family and the industriousness of the Veneto people. Besides all this, with the new Stefani you will nd the typical Italian creativeness and the great desire to apply this directly in our products and our services for you. Our people, our dimension, our history and values, for collaboration tailored to your needs.

new stefani: designed for the best. - petprom · for total solidity and the certainty of having a...

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