.

kyPowerful tank cleaning for small barrels and drumsAlfa Laval GJ 7

.

ApplicationThe smallest rotary impingement tank cleaning device, the Alfa LavalGJ 7 easily fits through a 3.8 cm (1.5”) access hole. Capable ofoperating at both high and low pressures, this device delivers 2.27 kg(5 lbs.) of cleaning force at .76 m (2.5 ft.) The Alfa Laval GJ 7 offersquick and easy cleaning of barrels, drums, and other small vessels in awide variety of industries. The device is part of the world-renownedGamajet range of high impact tank cleaning devices.

Working principleThe Gamajet range of high impact tank cleaning devices combinepressure and flow to create high impact cleaning jets. Cleaning occursat the point at which the concentrated stream impacts the surface. Itis this impact and the tangential force that radiates from that pointwhich blasts contaminants from the surface, scouring the tank interior.In conjunction with this impact, the device is engineered to rotate ina precise, repeatable and reliable, 360° pattern. This full-coverage,global indexing pattern ensures the entire tank interior is cleaned,every time.

TECHNICAL DATA

Lubricant . . . . . . . . . . . . . . . . . . . Food gradeMax. throw length . . . . . . . . . . . . . 2 - 2.5 m (7 - 8 ft.)

PressureWorking pressure . . . . . . . . . . . . . . 3.5 - 83 bar (50-1,200 PSI)Recommended pressure . . . . . . . . . 5.5 - 55 bar (80 - 800 PSI)

Cleaning Pattern

First Cycle Full Pattern

The above drawings show the cleaning pattern achieved on acylindrical horizontal vessel. The difference between the first cycle andthe full pattern represents the number of additional cycles available toincrease the density of the cleaning.

Certificate2.1 material certificate

PHYSICAL DATA

Materials1.4404 (316L), PTFE, EPDM (FKM and FFKM available)

TemperatureMax. working temperature . . . . . . . . 95°C (203°F)Max. ambient temperature . . . . . . . . 140°C (284°F)

Weight . . . . . . . . . . . . . . . . . . . . . 6.8 kg (1.5 lbs.)

ConnectionsStandard thread . . . . . . . . . . . . . . . ½” NPT, ½” BSP

OptionsElectronic rotation sensor to verify 3D coverage.

CautionDo not use for gas evacuation or air dispersion.

Disclaimer: Information in this product data leaflet is intended for general guidance purposes. Specific data for device selection and sizing is

available upon request.

Flow Rate Impact Throw Length

0 5 10 15 20 25 30 35 40 45 50 55

0.45

0.55

0.65

0.75

0.85

0.95

1.05

1.15

1.25

1.35

2

2.25

2.5

2.75

3

3.25

3.5

3.75

4

4.25

4.5

4.75

5

5.25

5.5

5.75

6

0 100 200 300 400 500 600 700 800 psi

m3/h USgpm

bar

2-Nozzle: 2.03mm(.080")Stator: 5H

2-Nozzle: 1.9mm(.075")Stator: 4H

2-Nozzle: 1.78mm(.070")Stator: 4X

2-Nozzle: 1.78mm(.070") Stator: 4

0 5 10 15 20 25 30 35 40 45 50 55

25.4

50.4

75.4

100.4

125.4

150.4

175.4

200.4

225.4

250.4

275.4

300.4

10

20

30

40

50

60

70

80

90

100

110

120

0 100 200 300 400 500 600 700 800 psi

cm. in.

bar

3-Nozzle: 2.54mm(.100")2-Nozzle:1.78mm(.070")Stator: 4X

2-Nozzle: 2.54mm(.100")

2-Nozzle:1.78mm(.070")Stator: 4

Inlet pressure Inlet pressure- - - Wetting, — Impact cleaning

Cleaning Time .100 NOZ Cleaning Time .7-.8 NOZ

0.34 0.44 0.54 0.64 0.74 0.84

4

5

6

7

8

9

10 2.5

3

3.5

4

4.5

5

5.5

6

6.5

7

1.5 2 2.5 3 3.5 4

rpm min

m3/h

24

20

10

12

15

MVSV

USgpm

Stator

Nozzle2.54mm(.100")

2.54mm(.100")

0.45 0.55 0.65 0.75 0.85 0.95 1.05 1.15 1.25

4

5

6

7

8

9

10 3

3.25

3.5

3.75

4

4.25

4.5

4.75

5

5.25

5.5

5.75

6

2 2.5 3 3.5 4 4.5 5 5.5 USgpm

rpm min

m3/h

20

16

12

10

15

1.78mm(.070")

Stator

Nozzle

5H4H4X4

1.90mm(.075")

2.03mm(.085")

Dimensions

Dimensions

A B C D E F Gmm 176 115 27 17 42 43 48in 6.9 4.5 1.1 0.7 1.7 1.7 1.9

Standard DesignThe choice of nozzle diameters can optimize jet impact length and flow rate at the desired pressure. As standard documentation, the Alfa Laval GJ 7can be supplied with a “Declaration of Conformity” for material specifications.

TRAX simulation toolTRAX is a unique software that simulates how the Alfa Laval GJ 7 performs in a specific tank or vessel. The simulation gives information on wettingintensity, pattern mesh width and cleaning jet velocity. This information is used to determine the best location of the tank cleaning device and the correctcombination of flow, time, and pressure to implement.A TRAX demo containing different cleaning simulations covering a variety of applications can be used as a reference and documentation for tankcleaning applications. The TRAX demo is free and available upon request.

.

Wetting Intensity

2.5

2.9

3.4

3.9

4.5

5.3

6.1

7.1

8.3

9.6

11

13

15

0.06

0.07

0.08

0.09

0.11

0.13

0.15

0.17

0.20

0.24

0.27

0.32

0.37

TD 523-208

(USgallon/ft2)

D1.8m(70”), H2.8m(110”), 2xØ2.03mm(2xØ2/25”) Time =

1.56 min.

D1.8m(70”), H2.8m(110”), 2xØ2.03mm(2xØ2/25”) Time =

6.25 min.

.

ESE03005EN 1015

Alfa Laval reserves the right to change specifications without prior

notification. ALFA LAVAL is a trademark registered and owned by Alfa Laval

Corporate AB. © Alfa Laval

How to contact Alfa LavalContact details for all countriesare continually updated on our website.Please visit www.alfalaval.com toaccess the information direct.