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046 Nozzles, Air-jets & Guns

NOZZLES

Sizes

As per the main image there are 4 main sizes of nozzle.

8mm (5/16”) nozzle – Not commonly used but provides a narrower blast stream for a more directed spray

10mm (3/8”) nozzle – Commonly used in Mercury and Comet machines where the flow from the 1.5kW pump can be optimally directed. Note that it is ok to use the larger nozzle too if you wish for a more dispersed spray pattern.

12.7mm (1/2”) nozzle – commonly used in Mars machines and above. Useful for the larger volume pumps as found on Mars machines and Titan machines.

Rectangular nozzle –  Useful for providing a narrow but wide pattern of blasting. It is not a common nozzle but it can be preferred if you predominantly have large flat surfaces to process.

wetblast nozzle

Materials

Urethane – These are the most common nozzles as they are long lasting and cost effective.

Boron Carbide nozzles – longer lasting but cost more. They are especially useful in situations where the machine is in constant operation and using harsher abrasives such as large aluminium oxide for example.

*Nozzles are all interchangeable between guns.

PROCESS GUNS

Dana Ridge process guns  are an efficient and reliable unit where the media/water mix is directed through a process nozzle while being atomized by compressed air directed through an airjet. Please note that these guns do NOT use a venturi process.

The urethane material ensures low wear rates. Unlike a dry unit there is no heat and wear is reduced thanks to the water. The lamina flow helps wetblast units last longer than their dry counterparts.

Mark 11 gun to suit...

Typical setup

MERCURY: Compact gun with Ø10mm (3/8”) nozzle

COMET : MK11 gun with a Ø4.76mm or Ø6.75mm air-jet and a Ø10mm (3/8”)  or Ø12.7mm process nozzle

MARS: MK11 gun with a Ø6.75mm air-jet and a Ø12.7mm process nozzle

TITAN: MK14 guns with a Ø12.7mm process nozzle

Compact gun to suit...

MAINTENANCE

Make sure the nozzle hasn’t become oval shaped and become excessively worn

Check the airjet has not become excessively worn. Air is abrasive on its own and if a worn airjet is caught early it can be replaced more cost effectively than a replacement gun.

Check the valve ball and spring (see exploded views above) are intact. These prevent media making its way up the airline when the air is off. They will prevent potential damage to regulators and solenoids further back in the air circuit.

 

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