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For knowledgeable and friendly advice please call 01405 862 688 or email info@pwm-sales.co.uk

What customers have to say about our work

“When I first e-mailed you I got a reply the next day advising me with what to purchase. You also went out of your way to get the grinder I required. You also went out of your way to have a normal conversation by e-mail. It looks like to me that you Paul care about small companies like me even though I live in NEW ZEALAND and also larger ones. Paul you are a credit to your company and may you go on to build it larger as you deserve it.”
Denis Roberts (Manager) New Zealand

“For over fifteen years we have come to rely on PWM and the products they supply. We can depend on them 24/7 to deliver quality, reliable equipment when required. The after sales service and technical support they provide is second to none”.
Active Floor Prep

"PWM go that extra mile to ensure that we receive the best quality equipment and consumables available. They are highly responsive to customer needs and can be relied upon to provide first class support and service."
Chris Macleod, Grimsby Resin Floors

"I feel I must tell you that I am over the moon with
the TV50 and C-tec cutting cowl. I used it for the first time today, and was amazed how well it
worked. It's worth its weight in gold. Thanks very much."
Regards Phil Hone.

Hi Paul,
Thank you for the lead.
Spoke to Rob, very happy with the two TV50’s which he purchased from you 10 years ago. We have now supplied him a new motor & head for one of the units the other is still going strong.
Best regards, Jerry”

"Over the past few years, Paul and his team have earned their place as one of our most valued and trusted suppliers. They offer a range of high quality, innovative products, backed with a level of service and knowledge that is hard to come by these days. Whether it's a large vacuum unit or a 'hard to come by' low cost fitting, PWM go the extra mile to achieve customer satisfaction."
Phil Hirons - Evagrip

“I just want to thank you for all your help when we were in England last week, we would have been in great difficulties, only for your help it was very much appreciated.” Ian & Billy Macauley

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FAQ - A Primer on Vacuums

FAQ - A Primer on Vacuums

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Price: Please contact us for price, or refer to individual model prices below.

Call us on 01405 862688

There are three important things to look for in a vacuum: CFM, static lift and filtration.

CFM

CFM is an abbreviation for cubic feet per minute. This is a measure of the volume of air the vacuum is moving. Most vacuums move enough air to work with point of origin dust collectors…at least for a few minutes. But on weak vacuums, when the filters start to load up, the CFM begins to drop.

Static Lift

Whereas CFM measures the volume of air moved, static lift measures the ability to keep the air moving under a load. Static lift is measured in inches. It can be equated to torque on a motor. If a vacuum has 80” of lift, it means it can lift a column of water 80” off the ground.

When a filter is loaded up with fine dust, it becomes more difficult to pull air through the pores. A vacuum that delivers 120CFM with 90” of lift will continue to pull a large volume of air through the filter whereas a vacuum that delivers 120CFM with 40” of lift will tend to see a substantial drop in the CFM pulled through the hose. This will result in a loss of efficiency for the dust collector.

Filtration

There are many types of good filtration systems. They run from pulse type back flush systems to paper and plastic disposable filters.

The most cost effective systems for the lower priced vacuum systems use a disposable paper or woven plastic filter. They typically hold 5-20 pounds of silica dust. They filter down to .5 microns which is close to the HEPA (High Efficiency Particle Absorbing) spec of .3 microns. When they are full of dust, they are removed from the vacuum and thrown away. They are typically used with a secondary filter that protects the motor and a HEPA downstream filter to remove particles from the exhaust.

Filter systems with poor performance are the pleated filters similar to the air filter on a carburetor or a pleated filter with a flannel bag overcoat. They tend to clog easily, choking down airflow. They are often found on home type garage vacuums that are designed for picking up leaves, dirt and large sawdust. They are generally not suitable for silica, asbestos or fiberglass dust.

In addition to CFM, lift and filtration, the operator should also be aware of how the vacuum is constructed and the true power of the motor.

A bypass motor is always the best design. With this design, the dust is not brought through the motor, thereby prolonging motor life, particularly the brushes and armature. If the vacuum is not equipped with a bypass motor, be sure it has a secondary filter downstream of the disposable filter to further protect the motor in case the disposable bag filter fails.

Lastly, be sure you know how to read the power of the motor. Many vacuums are advertised as 5hp motors. Closer examination will show the fine print to read 5hp at peak power. This is deceptive. All motors draw very high amperage for a few milliseconds upon starting. In almost all cases, the vacuums advertising 5 or 6 hp are actually drawing 30-36 amps on startup after which they settle down to 6 amps. These are really 1 hp motors.

Power in an electric is rated at 1 hp per 6 amps. If a 110/120V motor draws 12 amps continuously, it is a true 2 hp motor.


What is need to run Dust Collection Products dust collectors.

The Dust Muzzles, Crack Chasers and Saw Muzzle for the 7” worm drive saws will be very efficient if they have a steady 80 CFM of airflow through the exhaust port. This airflow can be well maintained if the vacuum has at least 80” of static lift.

The Saw Muzzle GP for the gas-powered saws runs best with a steady 110 CFM and at least 80” of static lift.

The TV50 is a very strong, industrial vacuum that is capable of running all the Dust Collection products including the Saw Muzzle for Gas-Powered saws at over 95% efficiency.

TV50


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Next Day Delivery! We try to keep stock of all items on our website for local collection, if your order is in stock we will try to dispatch it on the same day using a "next day" delivery service! Normally an order received before 4pm will be shipped the same day.

If you 100% need your order next day or would like a before 12 or before 10 service please call us on 01405 862688 to discuss details and costings

Orders placed for delivery outside mainland UK (Ireland) normally take 3-4 days. International deliveries are by agreement.

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