MNB-125 / Heavy-duty unit for installation and replacement of large pipes

Mnb125 zIMG1365.jpg

Hydraulic trenchless piercing unit with full steering capability and a pulling force of 125 tons. MNB-125 is capable of installing pipes as large as 500 mm in diameter at the distances of up to 150 m. MNB-125 is also used for trenchless replacement of old pipelines up to 600 mm in diameter by means of static pipe bursting.


The MNB-125 heavy-duty rod pusher is designed for tasks that require a large pulling force. It is perfect for directional underground piercing and pipe-pulling under roads, railway tracks and other obstacles, in particular at large distances. MNB-125 is used for installing new pipes and for replacing old pipes made of cast iron, ductile iron, concrete, ceramics and other materials.

Distinctive features

  • Hydraulics in impact-resistant casing for improved safety
  • Automated rod feeding system
  • Modular shoring system for depths up to 4,5 m

Mnb125 zIMG0778 hydrostation.jpg

Options for the MNB-125 unit installation and operation:

  • from the pit in the collapsible formwork.

No bentonite mixtures required.

Soil types: up to and including the 3rd category. 


General specifications:

Monitoring device:

Radar RD – 385 L

Operating temperature range:

-20° ... +40°С


94 tons

Pulling capacity for pipe pulling into position:

125 tons

Hydraulic cylinders:

2 pc.

Rated operating pressure of hydraulic cylinders:

20 + 20 MPa

Total weight of the basic equipment (bars not included):

3800 kg

Hydraulic unit:


2 pc. - Honda GX 690 (gasoline)


35.4 кW

Overall dimensions:

Hydraulic unit:
  Length    2260 mm
  Width    1020 mm
  Height   1045 mm

  Length     3350 mm
  Width   1200 mm
  Height   1615 mm

  Length     600 mm
  Diameter   60 / 82 mm
  Weight      15.9 kg



Key parameters:

Drilling parameters:
- Pipe-jacking length: 100 - 150 m*.
- Maximal diameters of pipes to be laid:  500 mm
- Personnel required for works: 4 persons.

Worn pipeline replacement parameters:
- New pipeline maximal diameter**:  500 mm.
- Minimal old pipeline diameter:  100 mm.
- Average length of a pipeline to be replaced:  200 m.
- Personnel required for works: 4 persons.

* - drilling parameters can vary and can be higher or less: they depend on geology, working team skills, soil moisture content etc.
** - with the same  diameter or with higher or smaller diameter.

Pipeline  types:
- Water and sewerage
- Gas
- Conduits for cables used for various purposes

Replaced pipeline material:
- Cast iron
- Reinforced concrete
- Ceramics
- Asbestos
- Steel

New pipeline material:
- Polyethylene
- Steel