Steering The Bore
The PD-7 was designed for use in difficult soil conditions where a pipe or cable is to be installed under a road or
in an area which cannot be dug. The PD-7 can install pipes by either directional thrust boring or pipe bursting.
These machines are excellent in areas where space is limited.
The PD-7 will operate from a pit only 77 inches long and has a thrust force of 112,000 lbs @ 3,000 psi. The maximum
push rate of PD-7 is 5 feet/minute and it can install up to 10-inch ID pipe in most compressible soils.
Minimum Maintenance-Maximum Life
The high strength steel frame is protected from wearing forces by a chrome plated steel guide bar. The pushing
mechanism slides on bronze bushings and uses special wiper seals to keep the lubricant in and the water and
dirt out. The patented mechanism provides long lasting service with a minimum of maintenance.
How It Works
The model PD-7 uses a cylinder-actuated positive-locking, non-slip jaw assembly that provides a steady force
when driving push rods. Sections of 2.5' push rods are screwed together and thrust into the ground. When the
target pit is reached, the steering head is removed and the appropriate ground expander is attached. The pipe
or cable that is to be installed is attached with a grip to the expander and the rods are retrieved until the
pipe is installed.
PD-7 Mainline Pipe Bursting System
- Height: 19.5"
- Length: 6'
- Width: 21.5"
- Weight: 10470 lbs
- Pull Force: 56 Ton (112 thousand lbs.)
- Hydraulic Pressure: 3000 PSI
- Hydraulic Flow: 19 to 35 GPM
The PD-7 uses detection technology located in the head of the rod to accurately establish its location underground
to within inches. The detection equipment provides information that indicates the orientation, location and depth
of our conically shaped steering head. This allows you to guide the rods around obstacles such as pipes, ducting
and building foundations safely and accurately until the final target is reached.