Tank cleaning equipment

GJ 7

The smallest rotary impingement tank cleaner

The GJ 7 tank cleaning machine is a small, powerful unit ideal for cleaning all types of barrels, drums and small vessels. It eliminates extensive handling by offeringone-step, one-insertion cleaning.

This rotary impingement tank cleaning machine can deliver fast “as new” cleaning in less than two minutes, and works especially well in tough cleaning situations involving wine, paint, and other difficult to clean materials.

The GJ 7 represents a major technological break-through, offering the most powerful cleaning in a compact, easy to handle size. Capable of running with the pressure and flow of your standard pressure washer.

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Product benefits

  • Smallest rotary impingement tank cleaner: 1.5 in. (38 mm) clearance
  • Operates at both high and low pressures
  • Powerful: 5 lbs (2.5 kg) of cleaning force at 2.5 ft. (0.75 m)

Operating Range:

  • Pressure: 50 to 1200 psi (3 to 80 bar) 
  • Temperature: 32° to 200°F (0° to 95°C)
  • Flow Rate: 2 to 8 gpm (7 to 30 l/min) 
  • Cleaning Radius: 2.5 ft. (.75 m)
  • Wash Cycle Time: 2 to 5 min.
  • Impact: 5 lbs (2.5 kg) at 2.5 ft. (.75 m)

Overall Dimensions:

  • Height: 7 in. (178 mm)
  • Body Diameter: 1.5 in. (38 mm) 
  • Clearance: 1.5 in. (38 mm) 
  • Weight: 1.5 lb (0.7 kg)
GJ 7 Cleaning Time
GJ 7 Cleaning Time Diagram
GJ 7 Impact Throw Length
GJ 7 Flow Rate

Other Specifications

Inlet Connection:

1/2 in. NPT-Female, ½ in. BSP-Female


Parts are machined from 316-L stainless steel investment castings or bar stock.

Impeller & Final Shaft:

For increased wear resistance, the input shaft is plasma-sprayed with a Chromium Oxide coating on stainless steel.

Shaft & Gearbox Bushings:

Turbine shaft thrust is absorbed by a Tungsten carbide bushing. Gear bushings are polyphenylene sulfide.

Bearing Cups:

Main body castings are protected by replaceable 316-L stainless steel cups for extended frictional wear life.

Static Seals:

O-Ring materials are selected for each application. EPDM is standard with Kalrez® and Viton® available. Other materials can be supplied on special order.

Dynamic Seals:

Rotary shaft and housing seals/bearings are spring-loaded, double-lipped and made of PTFE. They are reinforced for extra long wear and protection against leakage, abrasion and deposit build-up.


Standard nozzle sizes 0.050 in. (1.3 mm), 0.060 in.(1.5 mm), 0.070 in.(1.8 mm), 0.100 in. (2.5 mm). Other nozzle sizes are available upon request.

Drive Mechanism:

The wash fluid enters the GJ 7 at the inlet collar where it encounters and spins turbine blades. The turbine blades are attached to the top of the drive or rotor shaft. The bottom of this shaft is connected to the inside of a sealed, planetary gearhead which then turns the body in the horizontal plane and the nozzles in the vertical plane.

Planetary Gearhead:

The sealed planetary gearhead has an external casing made of steel, surface-anodized for corrosion resistance. This sealed gearhead is located inside the gearbox, which itself is sealed, and thus does not require any lubricant. All internal gearhead parts are hardened sintered steel.


 A food grade lubricant is inside the sealed gearhead casing. No customer-supplied or user-maintained lubricant is needed.

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