Colder temperatures and often frozen soil led many Canadian contractors to adopt hydro-excavation as a way to daylight, pothole and dig trenches. It’s become a common practice to use high-pressure water and vacuum to remove the debris while digging in Canada, especially in the oil and gas industries.
Why is hydro-excavation better?
Hydro-excavation has gained prominence in the United States for several reasons:
■ It offers time savings over traditional methods such as using back hoes or even more laborious methods such as shovels.
■ Less labour means cost savings.
■ It’s safer since workers perform the process on the surface rather than entering any trench or hole.
■ Operated properly, hydro-excavation won’t damage underground lines for utilities, water, sewer and more.
■ It’s more environmentally friendly, disturbing only the soil or area necessary to do a variety of tasks.
■ And it’s less noisy than air excavation. There are options to get the job done with either a trailer-mounted or truck system, each with advantages depending on the application and worksite. Trailers can be moved and unattached to be left on the job site but aren’t as easy to move around from one place to the next. Trucks are mobile, generally hold more powerful vacuum and other equipment, as well as larger water and disposal tanks.
Three technologies that cover a variety of applications
Robuschi’s line of positive displacement blowers offer three technologies to cover a variety of applications: low, moderate and heavy vacuum. The primary difference, though, in the Robuschi technology is how each blower in its line cools itself to avoid overheating, a serious problem that can shut down a hydro- excavation job. Many applications do not require digging deep, perhaps just using hydro-excavation to uncover utility lines, bury a cable, fibreoptics or ethernet line, or for shallow trenching. This shallow work doesn’t require as much vacuum to withdraw the debris into a holding tank. The standard workhorse for low vacuum and volume is the Sutorbilt Legend, which works well on trailer mounted units. It features a bi-lobe profile and comes in several configurations, including horizontal or vertical installations.
The blower’s cooler operating temperature extends blower life. This is extremely important in reliably handling continuous loads. The Sutorbilt Legend provides vacuum up to 15 in HG and with airflow up to 950 cfm.
RB-DV for Deep Vacuum
As American contractors, utilities, municipalities and more dig deeper and pull heavier substrate, they need a workhorse. Robuschi’s RB-DV blower offers best in class performance for deep vacuum. It’s typically mounted on hydro-excavation trucks that provide versatility to accomplish nearly any job. The RB-DV series allows for a variety of applications and certainly works well when deeper vacuum becomes necessary.
Air & Vacuum Technologies are a direct importer and distributor of the full range of Robuschi products and services throughout Africa.
Find out more about Robuschi products here.