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We have had a number of pest and weed control technicians stop by lately asking us to service their pumps because they were losing pressure. It turned out all that was needed was to clean their filters. We gave them a lecture, but no invoice, and sent them on their way.

Checking and cleaning your spray equipment filter is the best thing you can do to reduce downtime and repair expense. The following is an article I wrote that was published in Pest Management Magazine.

Would you like to boost productivity, improve service and reduce repair expenses? When it comes to pest industry spray equipment, the single most effective means of achieving these results is proper filtration.

Filtration is the removal of suspended foreign material from water. Foreign material can be dirt, sand, rocks, trash or anything else that makes its way into your spray tank, other than the chemical you've added.

Filtration is critical to pest management professionals (PMPs) because debris will wreak havoc: damage pumps; clog hoses, guns and tips and starve pumps of water, causing extensive damage. Our service facility estimates that almost 50 percent of sprayer repairs are avoidable if proper filtration design and operation is implemented.

While this article is focused on power sprayers, much of the information also applies to compressed air sprayers and backpacks as well.

Design

Design includes equipment selection, placement and access. Selection should be based on material being applied, quality of water, technician compliance and the type of pump.

Most PMPs can get by with one line strainer between the tank and pump. Note that a line strainer refers to the complete unit, which contains a metal filter. However, the mesh of the filter is important: Too fine, and it will clog quickly; too coarse and small debris will get through.

If your water source is poor, use additional filtration. For example, many termite pre-treaters in new home developments rely on water lines filled with debris. For some clients, we've added a line strainer on the hydrant fill line, a filter basket in the tank fillwell and/or two line strainers between the tank and pump. In the last situation, the first filter is coarse and the second is fine - a combination that works well to eliminate most debris.

Some pumps require more filtration than others. Roller pumps, for example, are sensitive to debris and require better filtration than diaphragm pumps.

It's critical that the filtration device be located for easy technician access. This includes being able to easily reach and check the filter, as well as ensuring the system is plumbed so the filter can be checked without causing a spill. If the tank is bottom-plumbed and the strainer is below the water level in the tank, be sure to install a shut-off valve so the filter can be checked even when the tank is full.

Whatever filtration system you and your equipment provider design, try to standardize it across all your vehicles.

Operation

Checking and cleaning the filter is the single most valuable preventative maintenance task you can perform. It's also the easiest.

For new equipment, check the filter daily. If there's consistently no debris, consider reducing the frequency. When you determine the appropriate frequency, make it a company policy. Too often is better then too seldom. Reinforce the importance of checking and cleaning the filter.

Maintenance

Eventually the filter will become too dirty to clean. Replace it. Chemicals will eventually swell the gasket in the line strainer, making it impossible to create an airtight seal and causing the pump to suck air. Replace the gasket.

Equip each vehicle with an extra filter and gasket so the technician can perform this repair in the field. If you've standardized your filtration, this is easy.

Eventually the line strainer body may crack, causing an air leak. This requires replacement of the entire unit.

These steps, if followed, will boost productivity, allow you to provide better service to your customers and reduce repair expenses.

Article Source: sprayequipmentblog.com

Aerosol Spray

Aerosol Spray is a dispensing system, the Aerosol Spray creates an aerosol mist of liquid particles. A liquid is contained under pressure in a can or a bottle, ones the spray applicator on top is pressed, the pressure opens the containers valve, the pressure then forces the liquid out through a small hole in which a mist or aerosol is formed and released. Some of the propellant evaporates inside the can as the gas expands to drive out the liquid, this happens to an even pressure is maintained. The droplets of propellant outside the can evaporate very quickly, in turn this leaves the expelled liquid as fine particles. There are many different substances dispensed using this method, some of which are:

• Deodorants
• Paints
• Insecticides
• Cleaning Products

Deodorants are the most common form of Aerosol Spray and are used everyday be people all around the world, The liquid contained inside is usually fragranced and used to spray on the body, the Aerosol Spray is a very effective way for the liquid to be dispersed.

Aerosol Spray Packaging

In the modern day Aerosol Spray Can there are 3 main parts to it, these are the Actuator (Button), the valve and of course the can. The most common material used to manufacture the can is Lacquered Tinplate, This is steel but with a layer of Tin aswell. This is not 1 sheet of metal but usually consists of 2 – 3 pieces of metal, this metal is crimped together to form the can. However this is not the only material that is used, for generally more expensive products Aluminium is used in place of Lacquered Tinplate. It is very important that the valve is crimped to the rig of the can, it is important as this determines the spray rate. The user puts pressure on the actuator and this in turn opens the valve, the spread of the spray is dependent on the shape and size of the actuator.

There is another type of dispensing systems and it is called the Bag-In-Can system (also known as Bag On Valve, BOV). In this type of dispensing system the pressurising agent is kept separate from the product, it is hermetically sealed in a laminated (multi layered) pouch. Because the product is kept away from the pressurising substance it ensures that only pure product is dispensed. The bag- in can system can actually increase a products shelf life and is widely used for sun care products like spray sun cream. It has many benefits like 360 degree dispensing, non chilling and quiet discharge. It can however be used for a lot of other products, for example:

• Industrial Products
• Pharmaceutical Products
• Pet Care Products
• Household Products

Aerosol Spray Health Hazards

Aerosol Cans come with two main health concerns and these are:

• The inhalation of the contained substance (when used to try and achieve a high from the propellant, and some Canned Air do not always use compressed air but sometimes other inert gasses.
• The second health concern is piggybacking or other dangerous particles.

About the Author

Daniel Owen writes about Aerosol Spray. To know more about Aerosol Spray, visit http://www.businessmagnet.co.uk

Are blow off valves (BOV's) legal?

Concerning their use with automobiles and turbochargers on the street, of course

Yes, they are 100% legal. Assuming of course they aren't loud enough to violate any noise ordinances in your city. You'd need a signifigant amount of boost and what's called a trumpet BOV for that though. Even then, you'd have to find a police officer actually willing to enforce that law..

Hope this helps, have fun tuning.

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