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Scrubber Dryers - How to Choose

The scrubber dryer is a familiar sight in industrial and commercial premises and it is an important tool in the housekeeping regime. It works by a mechanically driven brush acting on the cleaning surface to remove the dirt with the aid of cleaning chemicals.  The cleaning solution is dispensed from a tank on the machine, then the residue is then collected by a system of squeegees and ultimately deposited into a collection tank for later disposal. At the end of this process you should be left with a clean and dry floor.

There are choices to be made in selecting the right scrubber drier. For example a cylindrical brush is better for a polishing effect and degreasing recessed floors and a disc brush is ideal for persistent or adherent dirt.

Types of scrubber drier

There are two main types of scrubber drier, one pushed along manually by an operator and known as a walk-behind or pedestrian operated scrubber drier and the other is a ride-on scrubber drier where the operator drives the machine around the floor to carry out the cleaning. The level of sophistication of both types of machine varies and it is important to select one that suits its purpose.

Selecting the right one

For instance, not all machines have a vacuum recovery system and rely on the squeegees alone to mop up the residue, which in small areas requiring a lighter duty may be adequate. Perhaps the most important part of a scrubber drier is an efficient brush system as without that the dirt cannot be effectively lifted from the floor. Many machines on the market today have self levelling brushes or brush pressure adjustment capabilities to ensure that they can cope when the floor is not level which is often the case in industrial environments.

Scrubber driers are powered by either electric cable, or by chargeable battery pack. So the first consideration is about the proximity of a power supply - will there be one within reach of the area you want to clean - e.g. 15 metres? If there is a power supply, could trailing cables cause a hazard, e.g. in public areas.

Battery powered scrubber driers are becoming very popular and advances in battery technology mean that they can be used for quite long periods of time without re-charging. It's just a matter of calculating the floor area and productivity rate, then you can make sure you have a machine with long-enough battery life for your needs.

The size of the solution and recovery tanks should also be considered to ensure there is enough capacity to clean the required floor area. Where scrubber dryers are used in an industrial workplace they can come in for rough treatment, so the body of the unit should be durable and resilient to the possible hard knocks that may come its way.

The selection of the right scrubber dryer doesn't have to be a problem, contact our floor cleaning machine experts for advice, we're happy to help.

Scrubber drier terminology

Listed below are some explanations of the types of terminology used by manufacturers and what it means to a potential purchaser.
To download the Glossary click herePDF image

Terminology What does it mean? Why does it matter?
Dimensions The physical dimensions of the dryer

The cleaning width denotes the cleaning area, however the physical size of the machine also needs to be taken into account as it may have to fit through doorways or other smaller spaces. There may also be limited storage space.

Cleaning /Working Width The effective width of floor cleaned The cleaning width is determined by the size and placement of the cleaning brush, pad or roller and is different from the machine width. This is relevant for estimating how long it would take to clean a floor (along with the machine speed for ride-on machines). The dimensions of the area being cleaned are also relevant here, particularly if there are any small gaps or passageways which the machine needs to pass through.
Squeegee Width When a floor is cleaned the residue is collected by squeegees at the back the machine and vacuumed into the recovery tank

The squeegees collect the dirty water at the rear of the machine which is then vacuumed into the waste tank. The squeegee is wider than the machine body and is a vital part of the effective operation of the machine. An ineffective squeegee will leave dirty water behind

Vacuum Power Suction power of the machine The vacuum power is important, as the water needs to be removed. A weaker vacuum may mean not being able to clean in a single pass.
Tank Capacity

Capacity of solution tank and recovery (waste) tank

The capacity of the tanks is a factor determining how long the scrubber can work before refilling/emptying. Tank capacities can range from 4 litres to over 150 litres.
Brush/Pad The tools that do the cleaning
 

Scrubber dryers will use either a cylindrical or roller brush or a disc pad. Selection depends on the type of floor surface, how level the surface is and the nature of the soiling to decide which method gives the best results.

Scrubber driers with a disc type cleaning method usually have a lower initial cost (although not on all models), are simpler to maintain and replacement disc brushes are less expensive to replace than cylindrical brushes.

Cylindrical type scrubber driers keeps less bristle surface contact with the floor than disc brushes and also rotate up to 3-times faster. Most cylindrical models, particularly the larger versions also have the benefit of a debris tray mounted behind the brushes to collect small debris from the surface and eliminate the need for a pre-sweep prior to cleaning and reduce the potential of blockages in the squeegee area, giving better productivity.

Brush Pressure The pressure the cleaning brush exerts on the floor

Brush pressure is an indicator of cleaning efficiency, particularly on uneven floors.

Brush Speed

The speed at which the brush rotates
 

The brush agitates the detergent into the floor surface. A faster speed means more effective scouring

Traction

Machine with motive power
 

Pedestrian or walk-behind machines may be supplied with a traction drive to aid moving the dryer. For smaller machines it is not really practical as having this extra does add to the cost. Larger machines with bigger solution and waste tank need some additional motive power to reduce operator fatigue and increase the machine's manoeuvrability in tight areas.

Max Area Performance

The area that can be cleaned, normally expressed as square metres per hour
 

Enables a scrubber to be selected that can clean an area in the shortest time.

Machine Weight

The total weight of the machine normally in Kg
 

The weight is a consideration for the operator. It is also important to consider the design of the machine making sure that the machine is designed to make the weight manageable. If a machine is too light it may tip over or turn too easily

Power Source

Battery or mains powered
 

Mains powered machines have an advantage over battery operated dryers in that they can be used at any time and used for as long as needed. The downside is that, in larger areas the cable can get in the way of the cleaning process, slowing it down, as well as causing a potential trip hazard.
A battery operated machine can clean much quicker, however the cleaning time is limited by the battery size. A battery powered scrubber dryer will need to be charged before use and potentially needs more maintenance to ensure maximum use from the batteries.

Sound Level

The noise the dryer makes in operation
 

This is particularly important if the machine is to be used when other operatives or the public are present, normally the acceptable level is 63dBA.

Choosing a scrubber dryer is a big decision as efficient floor cleaning is an important part of any cleaning regime in industrial or commercial premises. The type and size of floor, the motive power, as well as the type of dirt being removed influences the choice of machine.

Hiring a floor scrubber

For regular use, it makes sense to buy your own machine, but for occasional use or to try one out, why not hire? We have a range of scrubber dryers available to hire at competitive prices.

Need advice? Give us a call and one of our scrubber dryer experts will be happy to help.