GRUNDFOS DATA BOOKLET

GT tanks

For cold water applications

2

Contents

General dataApplications 3Type key 3Tank range 3Sizing 4Material specifications 5

Dimensions and weightsGT-H and GT-D, vertical installation 7GT-H, horizontal installation 7GT-U, vertical installation, 10 bar 7GT-U, vertical installation, 16 bar 8

Product numbersGT-H, horizontal installation 9GT-H, vertical installation 9GT-D, vertical installation 9GT-U, vertical installation, 10 bar 9GT-U, vertical installation, 16 bar 9

Further documentationWinCAPS 10WebCAPS 11

GT tanksGeneral data

ApplicationsThe Grundfos GT diaphragm and bladder pressure tanks are suitable for domestic and industrial applica-tions where a controlled pressure is required.

Operating pressure

Liquid temperature

Typical applications:• domestic water supply systems• booster systems• irrigation systems• industrial systems.The Grundfos GT tanks are approved for use with pota-ble water.

The GT tanks can be used with any Grundfos pump.

Type key

Tank rangeThe GT tanks are available in sizes from 8 to 3000 litres suitable for vertical installation. GT tanks in sizes 24 to 80 litres are also suitable for horizontal installation.

The GT-H tanks have a non-toxic butyl rubber dia-phragm, dividing the tank chamber in two compart-ments. The upper compartment contains compressed nitrogen. The lower compartment has a liner in polypro-pylene (PP) and is filled with water from the pump. The GT-D tanks have a double diaphragm.

The GT-U tanks have a replaceable, non-toxic butyl rubber bladder surrounded by compressed nitrogen. The bladder is the only component in contact with the liquid.

GT-H and GT-D Max. 10 barGT-U Max. 16 barGT-U-8 V Max. 25 bar

GT-H and GT-D Max. 90°CGT-U Max. 70°C

Example GT - H - 80 V

Type range

Tank type:H = DiaphragmD = Double diaphragmU = BladderHR = Non-replaceable diaphragm for

heating application

Tank capacity [l]

Position:V = VerticalH = Horizontal

3

4

General data GT tanks

SizingThe required tank capacity can be calculated as fol-lows:

Capacity

V = Tank volume [litres]Q = Mean flow rate [m3/h]Δp = Difference between cut-in and cut-out

pressure [bar]Cut-in = Cut-in pressure (lowest) [bar]nmax = Max. number of starts/stops per hourk = Constant for tank pre-charge pressure:

k = 0.9.

Pumps fitted with a Grundfos MGE motor: Please refer to the Hydro 2000 data booklet.

The diagram below is based on the following values:

• differential pressure Δp: 1 bar• number of starts/stops per hour: 20• k = 0.9.Note: Tank sizes larger than 450 litres should be calcu-lated by means of the formula above.

Fig. 1 Tank size in relation to cut-in pressure and flow

V Q 1000 1 cut-in( ) Δp+ +( )××4 nmax Δp××

------------------------------------------------------------------------------ 1k---×=

TM02

893

8 24

0500.08 0.10.1 0.15 0.2 0.3 0.4 0.5 0.6 0.8 11 1.5 2 3 4 5 6 8 1010 12Q [m³/h]

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5[bar]

p

2 3 4 5 6 7 8 9 1010 20 30 40 50 60 70 80 100100 Q [l/min]

24 l 80 l 300 l8 l 12 l 18 l 33 l 130 l60 l 450 l170 l 240 l100 l

Cut

-in p

ress

ure

General data GT tanks

Material specificationsGT-H, vertical and horizontal installation

Fig. 2 Sectional drawing, example: GT-H-60 V

GT-D, vertical installation

Fig. 3 Sectional drawing, example: GT-D-130 V

GT-U, vertical installation (10 bar)

Fig. 4 Sectional drawing, example: GT-U-1000 V

TM02

909

3 18

04

Pos. Component Material

1 Tank body with liner Carbon steel and polypropylene (PP)

2 Diaphragm Butyl rubber3 Pipe connection Stainless steel DIN/EN 1.43014 Air valve Brass 5 Clamping ring Carbon steel6 Skirt1 Carbon steel

1 Fitted on GT-H-60-V and GT-H-80 V

TM02

909

5 18

04

Pos. Component Material1 Tank body Carbon steel2 Double diaphragm Butyl rubber3 Pipe connection Stainless steel DIN/EN 1.43014 Air valve Brass 5 Clamping ring Carbon steel6 Skirt Carbon steel7 Tapped hole Steel

1

2

4

5

3

6

4

7

1

2

5

6

3

TM02

915

1 20

04

Pos. Component Material1 Tank body Carbon steel2 Bladder Butyl rubber3 Flange Carbon steel4 Air valve Steel/Brass 5 Feet Carbon steel6 Lifting eye Carbon steel

5

3

2

1

3

4

6

5

6

General data GT tanks

GT-U, vertical installation (16 bar)

Fig. 5 Sectional drawing, 8 to 25 litres

Fig. 6 Sectional drawing, 80 to 1000 litres

TM03

249

0 44

05TM

03 2

493

4405

Pos. Component Material1 Tank body Carbon steel2 Bladder Butyl rubber3 Flange Carbon steel4 Air valve Steel/Brass 5 Feet Carbon steel6 Lifting eye Carbon steel

GT tanksDimensions and weights

GT-H and GT-D, vertical installation

GT-H, horizontal installation

Supporting bracket

GT-U, vertical installation, 10 bar

TM02

908

7 18

04 -

TM02

908

6 18

04

Type Size [l]

Dimensions [mm] Gross weight

[kg]D H S

GT-H-8 V 8 202 303 G1 2.3GT-H-8 V 8 202 303 G¾ 2.3GT-H-12 V 12 244 365 G¾ 3.1GT-H-18 V 18 279 367 G1 4.6GT-H-18 V 18 279 367 G¾ 4.6GT-H-24 V 24 289 447 G1 5.1GT-H-33 V 33 289 584 G1 6.7GT-H-60 V 60 397 557 G1 11.0GT-H-80 V 80 397 755 G1 16.0GT-D-100 V 100 406 874 G1 18.6GT-D-130 V 130 406 1086 G1 24.5GT-D-170 V 170 533 929 G1 30.4GT-D-240 V 240 533 1201 G1 37.2GT-D-300 V 300 533 1488 G1 44.9GT-D-450 V 450 660 1520 G1 69.5

TM02

908

5 18

04

Type Size[l]

Dimensions [mm] Gross weight

[kg]D H B L1 L2 L3 L4 Z S

GT-H-24 H 24 289 297 235 447 250 84 156 4 G1 6.0GT-H-60 H 60 389 396 342 532 299 102 199 4 G1 12.8GT-H-80 H 80 389 396 342 730 229 201 306 4 G1 17.2

SD

H

D

H

S

8-33 litres 60-450 litres

L3

D

H

L2

L1

S

BZ

L4TM

02 1

611

1501

Type Size [l]Dimensions [mm]

B1 B2 B3 B4 ZGT-H-24 H 24 220 165 139 107 10GT-H-60 H 60 220 165 139 107 9GT-H-80 H 80 220 165 139 107 9

TM02

908

3 18

04

Type Size [l]

Dimensions [mm] Gross weight

[kg]D H H1 S

GT-U-800 V 800 750 2260 143 DN 50 270GT-U-1000 V 1000 750 2760 143 DN 50 345GT-U-1500 V 1500 1200 2538 291 DN 65 535GT-U-2000 V 2000 1200 2440 291 DN 65 710GT-U-3000 V 3000 1500 3340 320 DN 65 1050

B4

B3

B1

B2

4 x Z

HD

H1

S

110

7

8

Dimensions and weights

GT tanks

GT-U, vertical installation, 16 bar8 to 25 litres

80 to 1000 litres

TM02

908

6 18

04

Type Size [l]

Dimensions [mm] Gross weight

[kg]D H S

GT-U-8 V 8 206 315G ¾

3.5GT-U-12 V 12 280 310 3.5GT-U-25 V 25 280 500 7.1

TM03

2492

440

5

Type Size [l]

Dimensions [mm] Gross weight

[kg]D H H1 S

GT-U-80 V 80 450 925 185

DN 50

70GT-U-120 V 120 450 1235 185 96GT-U-180 V 180 450 1515 185 116GT-U-300 V 300 750 1275 188 140GT-U-400 V 400 750 1395 188 215GT-U-600 V 600 750 1860 183 290GT-U-800 V 800 750 2260 183 345GT-U-1000 V 1000 750 2760 183 405

SD

H

9

GT tanksProduct numbers

GT-H, horizontal installation

GT-H, vertical installation

GT-D, vertical installation

GT-U, vertical installation, 10 bar

GT-U, vertical installation, 16 bar

Type Size[l]

Max.pressure

Pre-pressure

Product number

GT-H-24 H 2410 bar 1.5 bar

96528388GT-H-60 H 60 96528389GT-H-80 H 80 96528390

Type Size[l]

Max. pressure

Pre-pressure

Productnumber

GT-H-8 V 8

10 bar 1.5 bar

96526321GT-H-8 V 8 96528335GT-H-12 V 12 96528336GT-H-18 V 18 96528337GT-H-18 V 18 96526322GT-H-24 V 24 96528339GT-H-33 V 33 96528340GT-H-60 V 60 96528341GT-H-80 V 80 96528342

Type Size[l]

Max.pressure

Pre-pressure

Product number

GT-D-100 V 100

10 bar 1.5 bar

96528343GT-D-130 V 130 96528344GT-D-170 V 170 96528345GT-D-240 V 240 96528346GT-D-300 V 300 96528347GT-D-450 V 450 96528348

Type Size[l]

Max.pressure

Pre-pressure

Productnumber

GT-U-800 V 800

10 bar 4.0 bar

96573281GT-U-1000 V 1000 96573282GT-U-1500 V 1500 96573283GT-U-2000 V 2000 96573284GT-U-3000 V 3000 96573285

Type Size[l]

Max.pressure

Pre-pressure

Product number

GT-U-8 V 8 25 bar

4.0 bar

96573347GT-U-12 V 12

16 bar

96573348GT-U-25 V 25 96573349GT-U-80 V 80 96573358GT-U-120 V 120 96573359GT-U-180 V 180 96573360GT-U-300 V 300 96573361GT-U-400 V 400 96573362GT-U-600 V 600 96573363GT-U-800 V 800 96573364GT-U-1000 V 1000 96573365

10

GT tanksFurther documentation

In addition to this printed data booklet, Grundfos offers the following sources of product documentation.

• WinCAPS• WebCAPS.

WinCAPSWinCAPS is a Windows-based Computer Aided Product Selection program containing information on more than 185,000 Grundfos products.

Available on CD-ROM in more than 22 languages, WinCAPS offers

• detailed technical information• selection of the optimum pump solution• dimensional drawings of each pump• detailed service documentation• installation and operating instructions• wiring diagrams of each pump.

Fig. 7 WinCAPS CD-ROM

Fig. 8 WinCAPS

cd-w

inca

psW

inC

AP

S

Click Catalogue and select a product from the extensive product catalogue.

Click Sizing and select the most suitable pump for your application.

Further documentation

GT tanks

WebCAPSWebCAPS is a Web-based Compute Aided Product Selection program and a web-version of WinCAPS.

WebCAPS is accessible on Grundfos’ homepage, www.grundfos.com, and offers

• detailed technical information• dimensional drawings of each pump• wiring diagrams of each pump.

Fig. 9 WebCAPS

Web

CAP

S_E

nglis

h

Click Catalogue and select a product from the extensive product catalogue.

Click Literature to select and download Grundfos documenta-tion by browsing the product ranges or performing a specific search. Literature includes:– data booklets– installation and oper-ating instructions– service, etc.

Click Search and select a product from the extensive product catalogue.

Click Service to find information on service kits and spare parts.

Click Sizing and select the most suitable pump for your application.

Click Replace-ment and select the right replacement pump based on the current installation.

Click CAD drawings to select and download CAD drawings in:–.stp–.dxf–.dwg

Being a registered user click Log in to:– save your settings– define and save your

own units– save personalised

information.

Click Settings and select your preferred options.

11

www.grundfos.com

96552805 0106 GBRepl. 96552805 1104 Subject to alterations.

Being responsible is our foundationThinking ahead makes it possible

Innovation is the essence

GRUNDFOS A/S . DK-8850 Bjerringbro . DenmarkTelephone: +45 87 50 14 00