Lightweight, Cost Effective Hydrovacs

FAQ

Q?

How does the boom compare to those on the largest units?

A.

The Rival boom is a 6 inch boom complete with a 5 inch dig tube. A 6 inch dig tube can also be used but it is recommended that a 5 inch is the selected size to prevent rocks from stopping half way up the hose. The large units use 8” booms with either 6 or 8 inch dig tubes. In rocky conditions there will be times when the larger boom will perform better. With the Rival there will be more lifting of rocks out of the hole that do not fit in the tube. So each 5 to 7 inch rock will be deadheaded out of the hole with the Rival unit.

Q?

How will the blower perform as compared to the larger trucks?

A.

The Rival blower is a Robuschi RBDV105. This blower is capable of 2800 CFM and Full Vacuum. Blower performance is measured in two ways. Vacuum and CFM. This blower will create full vacuum, just the same as the largest blower. It will create less CFM than the large blowers however it is doing so through a 6” plumbed system, which creates very similar air speed at the dig tube to most larger blowers. Diameter of 6” to 8” hose is about half in terms of volume, forcing the air to speed up to get through the hose. Rival anticipates very little difference in performance as compared to the largest blower units, except in extreme remote applications.

Q?

It would seem as though the Rival lacks storage space.

A.

It does not have near as much storage space as the largest units. The Rival was engineered to maximize features, while limiting footprint and weight. We feel as though there is enough space for the required tools of the job. Remote hose will not fit on the fenders of the Rival truck. It would have to be transported separately or on the top of the truck.

Q?

Can a Rival keep up with a larger truck when limited by hose and dig tube diameters?

A.

The Rival unit features 6” plumbing and a 5” dig tube. The large units feature 8” plumbing and a 6” dig tube. So from a picking-up-rocks-perspective you are losing an inch of rock size. The advantage to the 6” plumbing is that you optimize blower performance and are able to pressure off. There would be few jobs where this factor would influence production, on the contrary, production would be gained when needing to pressure off.

Q?

Why is the water pump smaller in available flow than the conventional large Hydrovac units?

A.

Most large units currently have water pumps that can push up to 25 GPM of water. The reality is, they never do. The vast majority of tips and nozzles utilized in this industry range from 6 to 12 GPM. The Rival pump will accomplish this task. Our recommendation is to operate the unit in average soils at 6 to 8 GPM. An additional benefit of using a water pump sized properly to the application is that the replacement parts or a replacement pump is much more competitively priced. Most hydrovacs are run at approximately 10 GPM and 2000 PSI.

Q?

How much water will the Rival hold? How do I compete with larger capacity trucks?

A.

The Rival truck, due to weight restraints, holds 800 gallons of fresh water. This is half of the large units. Our recommendation is to operate the wash pump at 6 to 8 GPM to in essence make the water capacity larger. The trailer or truck used to support these units will also hold fresh water and be able to refill a truck as required.

Q?

How much debris will the Rival hold? How can I compete with trucks that hold more mud?

A.

The debris capacity of the Rival T7 is 7 cubic yards. The Rival has the ability to pressure off, which is a feature unavailable to the vast majority of hydrovac units. This allows the user to offload the flow able contents into another tank, trailer or truck, who can shuttle the material to disposal. Through using this approach, the productivity level of the Rival will exceed that of a conventional large hydrovac unit which travels to disposal with each load.