Gamajet 4 Tank Cleaning Machine

Gamajet 4 Tank Cleaning MachineOur Most Powerful Tank Cleaning Machine

Our largest automated tank cleaner, the Gamajet IV “GT” tank cleaning machine is designed to clean larger-sized tanks with diameters of over 15′ (4.57 m). Developed and upgraded from the proven Gamajet III, the IV “GT” is a hydraulically driven rotary tank cleaning machine that revolves 360° in both horizontal and vertical planes. Synchronized solid jets provide a tight and thorough scouring pattern covering all interior tank surfaces in one complete cycle.

The IV “GT” is available in stainless steel or silicon bronze with a choice of oil-lubricated or flow-thru (wash fluid lubricated) gearboxes. Gear trains are designed to maximize wear life which offers improved reliability and reduced downtime.

With a choice of twelve nozzle sizes, various hydraulic turbines and stators along with two gear systems, the Gamajet IV GT offers a wide operating range of flow rates, nozzle rotation speeds, and wash cycles. The IV “GT” is fully capable of high concentration chemical recirculation cleaning or high pressure/low volume water jet scrubbing in fixed CIP automated systems.

Gamajet 4 GT Technical Spec

Operating Range

  • Pressure: 20 to 500 psi (1.4 to 34.0 bar) standard model
  • 20 to 700+ psi (47.6 bar) high pressure model
  • Temperature: -60° to 250°F (-29° to 121°C)
  • Flow Rate: 30 to 320 gpm (114 to 1211 l/min)
  • Cleaning Radius: 100′ (30.48 Meters)
  • Wash Cycle Time: 3 to 30 Minutes
  • Nozzle Rotation Speed: 2 to 20 rpm
  • Impact: 85 lbs (39 kg) at 25′ (7.5 m)

Overall Dimensions

  • Height: 12.2″ (309.88 mm)
  • Diameter: 4.2″ (106.68 mm)
  • Width: 6.1″ (154.94 mm) including nozzle housing

Clearance Dimensions

  • Pin Drive: Dual: 12.7″ (322.58 mm)
  • Triple: 11.5″ (292.1 mm)

Optional Clutch Drive

  • Dual: 6.7″ (170.18 mm)
  • Triple: 9.6″ (243.84 mm)
  • Weight: Dual: 28 lb (12.7 kg)
  • Triple: 29 lb. (13.2 kg)

Dual Inlet Connection

  • Standard: 2″ NPT female and 2 1/2″ quick disconnect male
  • Optional: 2″ NPT female and 2 1/2″ NST (NH) hose thread male

Other Options

  • Directional Units
  • Bronze Castings
  • High Impact Nozzles

Other Specifications

Construction / Design

New Features: Streamlined turbine and internal flow passages, including a patented porting design that significantly improves efficiency.


Investment cast parts of type 316 stainless steel ensure consistent strength & quality for higher pressure ratings. Shafts: Rotor shaft and gearbox shafts are made of hardened stainless steel. For increased wear resistance, the rotor shaft is supplied with a plasma-sprayed ceramic or other protective coating. The rotor shaft is also fitted with a polished carbide thrust washer for added durability.

Bearings, Shaft

Rotor shaft bearings are tungsten carbide. Gearbox shaft bearings in flo-thru (oilless) gearboxes are PTFE or other non-cupric materials. Standard bearings in oil-lubricated gearboxes are Oilite bronze with nonmetallic bearings available as an option.

Seals, Static

O-ring materials are selected for each application. Viton is standard. Drive Gears: A new gear system of improved design and construction is incorporated in Gamajet IV “GT” models for increased wear life: All gears are manufactured entirely of selected stainless steel alloys and the two bottom gears are fitted with long-life tungsten carbide thrust washers.

Lubrication, Gearbox

Sealed: Oil-lubricated machines have a sealed gearbox filled with FDA approved oil. Flo-thru: The flo-thru gearbox is lubricated by the cleaning solution. With this option, maintenance of gearbox seals is eliminated. Lubrication, Waterside: A controlled amount of the cleaning solution is permitted to flow through the tee and nozzle housing bearings for lubrication and cooling.

Self-Cleaning Provisions

A low-pressure bypass system keeps the bevel gears and other internal parts flushed free of debris that could interfere with proper functioning.


Interchangeable nozzles are now available in twelve sizes from 5/8″ (15.9mm) down to .177″ (4.5 mm). Nozzle sizes of 1/4″ (6.35 mm) and smaller are offered with new tungsten carbide inserts for improved jet wear at high pressures.

Make an Enquiry