Pipe In-situ Replacement System—Expander
The expansion method for in-place replacement utilizes specialized expander to generate controlled radial expansion forces within existing pipes. This uniformly enlarges or splits the old pipe diameter while simultaneously pulling new pipe into the expanded cavity. This single-pass process completes pipe rehabilitation by “expanding and replacing" without excavation or additional working pits.
| Items | Unit | ZGT315 | ZGT355 | ZGT400 | ZGT450 | ZGT500 |
| Rated power | KN | 30 | 30 | 30 | 30 | 30 |
| Power | KW | 4 | 4 | 4 | 4 | 4 |
| Length | mm | 720 | 800 | 810 | 850 | 895 |
| Diameter | mm | 335 | 375 | 420 | 470 | 520 |
| Maximum size after expansion | mm | 367 | 406 | 448 | 498 | 560 |
| Pull rod spec | mm | φ60或φ68 | φ60或φ68 | φ60或φ68 | φ60或φ68 | φ60或φ68 |
| Minimum diameter of the entry hole | mm | 350 | 390 | 450 | 500 | 550 |
| Required inner dimensions (length) of the well | mm | 650 | 730 | 740 | 780 | 825 |
Equipment Features
Main System
- Automatic threaded tie rod traction enables one-button push/pull operation, reducing labor intensity by 70%.
- Lightweight quick-install locking kit at the manhole end allows single-person installation in 1 minute without heavy lifting.
Hydraulic Power Unit
- Features automatic directional switching and pressure self-locking with dual overload and leakage protection.
- Equipped with manual/automatic integrated solenoid valves and standard wireless remote control, enabling operators to work safely and efficiently away from the shaft opening.
Lightweight Quick-Install Locking Kit at Shaft Entry End
Frequently Asked Questions
What is your delivery time?
Our standard production time is approximately 20 days. For items in stock, we can ship within 3 business days.
How do you ensure product quality?
We conduct rigorous quality inspections and performance tests on every drill rod prior to shipment to guarantee reliability and durability.
Do you accept sample orders?
Yes, we welcome sample orders as an opportunity for you to evaluate our product quality before committing to larger quantities.
Are your drill pipes heat-treated?
Yes, all our drill pipes and casings undergo professional heat treatment to enhance their structural strength and operational performance.
Do your drill pipes have anti-rust protection?
Yes, each drill pipe and casing receives anti-rust paint or anti-corrosion oil coating before shipping. Galvanized options are available upon request.
Contact:Mrs. Tina Zhao
Whatsapp/Wechat:+86 13507065529
