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041 Health and Safety

No harmful dust

Dust suppression

Dana-Ridge wetblast units use water as a fundamental part of the process. This suppresses dust, eliminating the need for expensive filters and removing the  worry about breathing it into your lungs.

It is just one of the major benefits of the wet process over the dry

No free silica

Blast media

Even if you disregard the water suppression, media sold by Dana-Ridge is designed for blasting. Glass bead is made from soda-lime glass, so doesn’t contain the harmful ‘free-silica’ that can cause long term health issues. Other media such as crushed glass for blasting is also silica free.

Glass bead
Minimise slip hazzards

Slips/falls hazzard mitigation

Something to be wary of when dealing with blast media is the slip and fall hazzards. If you’ve ever felt glass bead you’ll know they are like tiny ball bearings, (then add water to the mix). Angular media such as garnet, aluminium oxide. crushed glass etc is not as much of a problem (in fact crushed glass is sometimes added to paint to apply as a non-slip surface)

This hazzard can be effectively mitigated through the use of ‘anti-fatigue’ rubber mats such as those pictured. The beauty of this is that it provides a good non-slip surface where the operator stands and under the door when loading/unloading components. It simultaneously traps any rogue media in the open holes of the mat, making it a clean and safe work area. Cleaning is simply a matter of lifting the mat and vacuuming or sweeping out when necessary.

anti-fatigue mat
Venting and ducting options

Venting

The machine has a vent at the top with the purpose of allowing the cabinet to “breathe” If there was no vent the cabinet would pressurise and cause poor visibility.

The vent has a protective cover inside to prevent larger media getting thrown out the top (especially if you’re doing things such as wheels that redirect flow quite readily). However if you find that some media is still getting past this obstacle then feel free to add some ducting or tubing (as pictured) to either extend the height or even directly vent to the outside depending on your preference. If you want to add an extractor fan then that’s fine.

The majority of the machines out in the field don’t have any additional ducting or extractors added and that’s ok too.

Remember to periodically clear the vent of build-up.

inner deflector with blast resistant cover

200mm dia. tubing added to a Mars machine

Excellent viewing

Visibility

Excellent visibility is achieved with a large viewing window, excellent lighting and white reflective blast curtains. 

Viewing window is made of either tempered or laminated glass to provide protection to the user.

Wetblast machine in use
Water Quality

Water oxygenation

The process of the machine itself agitates and oxygenates the water to a great degree. .

Low oxygen levels in water along with warm temperatures and stagnation can encourage water-borne bacteria.

As a general guide, it is important that the water in the machine and recirculating tank is circulated/agitated at least weekly to impede any bacterial issues on site. This is especially the case in the summer months as the ambient air temperatures are more conducive for bacteria growth than winter.

If the machine is not expected to be used for a couple of weeks, say at Christmas or Easter, it is a good idea to either drain the water and leave the machine and recirculating tank system empty, or have someone run the machine for a least 15-20 minutes/week to circulate and agitate the water.

The VR20 No Rust contains a mild biocide to prevent bacterial growth.

Clean out the machine asap if blasting organic material such as grease and fats from a BBQ plate for example. 

Manual handling

Manual Handling

Large machines such as the Titan (pictured) can take up to 750kg. They come standard with a removable turntable and a trolley system. It means heavy items can be loaded onto the turntable via overhead crane for example and easily rolled into the machine for processing.

The Mars machines can also be modified to accept a trolley system. The strong materials and quality components means it can take up to 200kg centrally located on the turntable.

safety limit switches on all units

Limit switches

Contactless limit switches shut the machine off if the door is opened while blasting is in process. The pump is a high volume low pressure pump so is relatively low risk. The air pressures used (max 80-90psi) are lower than some machines that can use thousands of psi. However compressed air at this level is still a safety concern so the safety switches are a must and we do not recommend tampering with or bridging these out.

 

Semi automated machines also have features to prevent manual usage while in the automated phase.

Other features

Other safety features

Double check valves

to make sure industrial water does not make its way back into the water supply

Electrical safety

Electrical box with removable key, circuit breakers etc All machines are tested and tagged before dispatch

Hand protection

Natural rubber gloves with a crumbed hand provide good grip and protection from the blast stream

Containment

Blast material is contained in the cabinet meaning no need to wear any protective equipment

Low Noise

Low noise

Mars machine pumping slurry with no air:
approximately 74dB

Mars machine pumping slurry and air:
approximately 79dB

Solidly built cabinets with low noise attenuation due to the fibreglass. The fibreglass is protected inside from the blast stream by white urethane curtains.

Steel units are coated inside with an abrasive resistant material that also acts as a noise suppressant.

Tool Post

Ergonomic process guns and tool-post as standard

The process gun can be mounted to the tool post if required. This gives the option of moving the part around the gun rather than the gun around the part. It depends on your preference and of course the size and shape of the parts being blasted. 

Tip: Relax and hold the gun in a manner that lets you control it without fatigue. Done correctly you can blast for hours.

Walk -in blast rooms

Safety gear for walk-in blast rooms

Deadman guns, blast helmets and other safety equipment are required for walk-in wet blast rooms. These are not necessary for the cabinets as the operator is protected by the unit itself.

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Once you have one of these machines, you'll wonder how you ever got along without it!