Alfa Laval GJ 7

The Alfa Laval GJ 7 tank cleaning machine is a small, powerful unit that is ideal for cleaning all types of barrels, drums, and small vessels. It eliminates extensive handling by offering one-step, one-insertion cleaning. The Alfa Laval GJ 7 delivers fast, effective cleaning that is complete in less than two minutes. It works especially well in tough cleaning situations involving wine, paint, and other difficult materials.

The combination of rugged, long-lasting design, powerful jet spray cleaning, and field serviceability have long made Gamajet the first choice for cleaning among the world’s best known companies. The Alfa Laval GJ 7 represents a major technological breakthrough, offering the most powerful cleaning in a compact size. It is capable of running with the pressure and flow of a standard pressure washer.


The smallest rotary impingement tank cleaning device, the Alfa Laval GJ 7 easily fits through a 1 ½ inch access hole. Capable of operating at both high and low pressures, this device delivers five pounds of cleaning force at 2 ½ feet. The Alfa Laval GJ 7 offers quick and easy cleaning of barrels, drums, and other small vessels in a wide variety of industries. The device is part of the world-renowned Gamajet range of high impact tank cleaning devices.

Working Principle

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

Standard Design

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


Electronic rotation sensor to verify 3-D coverage.

Caution: Do not use for gas evacuation or air dispersion.

Cleaning Pattern
The above drawings show the cleaning pattern achieved on a cylindrical horizontal vessel. The difference between the first cycle and the full pattern represents the number of additional cycles available to increase the density of the cleaning.
Technical Data
LubricantFood Grade
Throw Length (max)7 - 8 ft
Working Pressure44 - 1,200 psi
Recommended Pressure80 - 797 psi
Working Temperature (max)203°F
Ambient Temperature (max)284°F
Weight1.5 lb
Connections0.5 inch NPT, 0.5 inch BSP (standard thread)
Materials316L, PTFE, EPDM (FKM and FFKM available)
2.1 material certificate
Dimensional Data
A (in)6.9
B (in)4.5
C (in)1.1
D (in)0.7
E (in)1.7
F (in)1.7
G (in)1.9
Flow Rate
Impact Throw Length
Cleaning time .7 - .8 NOZ

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