BUTLER CLEANING SYSTEM
#1 Van Powered Carpet, Fabric, Hard Surface and Restoration Cleaning System
Although truck mounts come in all shapes and sizes, they share four key components, common to all units:
A key benefit of a truck mount is that it is self-contained. It powers itself, without any outside connection (e.g., electricity) required. This adds speed, flexibility, and power. Most truck mounts are gasoline or propane powered. Engines used in slide-in units are typically 16 hp to 24 hp and can be air-cooled or water-cooled. Van-powered units are driven by the vehicle’s engine.
The key to success in a truck mount can be found here. Truck mounts use positive displacement vacuum pumps that enable them to clean several hundred feet from the unit with minimal loss of power. Portable, electric-powered extraction equipment, on the other hand, typically loses too much power to operate in this manner. Although CFM (cubic feet per minute) and vacuum lift figures sometimes sound sufficient on larger portables, the centrifugal vacuum systems used in these machines cannot perform as well at long hose lengths.
There is a direct correlation between vacuum power at the wand and the efficiency of water recovery. Recently, the focus of performance has been brought to bear more on the amount of air being moved than the lift shown on the gauge. Air movement is expressed as CFM and lift as inches of mercury (1″ Hg equals 13.5″ water lift). High performance truckmounts will be capable of moving at least 290 CFM and larger units as much as 405 CFM. These impressive vacuum levels result in significantly faster cleaning and are responsible for much less residual water in the carpet after cleaning.
The water pumping systems built into truck mounts are high pressure systems which are generally capable of over 1,000 psi. These systems are generally operated at 300-400 psi and when properly engineered, this high pressure water increases cleaning power without harm to the carpet. One key to successfully using high pressure water in a truckmount is that it is well balanced by the capability of the unit’s vacuum system to remove the water as fast as it is applied. The pressures employed by portable units are typically in the 40-100 psi range and are correspondingly less aggressive in the cleaning process.
Perhaps the most significant benefit to cleaning with truck mounted equipment is the high water temperatures these units can sustain. It is a commonly accepted fact that water cleans better as temperature is increased, as long as the temperature does not exceed a level safe for the fabric. With heat, the activity of cleaning chemicals is dramatically increased, which improves both the speed of cleaning and the effectiveness of soil removal. Some soils, particularly greasy soils, become particularly easy to remove with elevated temperatures. A well-engineered truck mounted system, supplied with cold water, is capable of producing a constant, reliable water temperature of 190-240 degrees F. This is the temperature before the water experiences the normal heat losses of the system. The most substantial heat reduction is at the jet tip where the water is atomized and sprayed into the air, where it can lose as much as 30 degrees instantly.
As a result of the system heat losses, the temperature of the water will end up at about 150-180 degrees F., which is safe for any carpet manufactured. Portable extraction equipment does not share the same cleaning advantage of heat. Starting at about 100-120 degrees, when the heat losses occur, the cleaning temperature drops to about 100 degrees or less.
Efforts to supplement heat loss through the use of electric heaters are only minimally effective and can’t duplicate the heat rise achieved by a truck mount. The amount of thermal energy available from 20 amps at 120 volts may be sufficient to raise water temperature a few degrees but will not achieve the 100+ degree heat rise that truck mounts enjoy.