Hengli hydraulics has been developing and producing shield machine cylinders since 2005, and has successfully exported them all over the world, and has a leading global market share. For example, the Bertha shield machine in Seattle, the entire set of high-pressure cylinders are from Hengli. Even though the equipment was constructed underground for two years, Hengli's cylinders did not suffer from corrosion and seal aging.
In recent years, Hengli has developed more energy-saving and efficient hydraulic systems for shield machines in accordance with customer requirements and the characteristics of the domestic shield market application. In the multiple systems of the shield machine, we are equipped the V30D series on the Inline brand with a low-noise and more reliable.
V30D-140 pump is used in the thrust hydraulic system;  
V33D-250 closed pump is used in the rotary hydraulic system of the screw machine; V30D-140+45 pump is used in the assembly machine and auxiliary hydraulic system; V30D-115 pump is used in the synchronous grouting hydraulic system.
We customized solutions for customers fully meet the needs of complex working conditions such as high frequency, high load, vibration, and pollution during underground construction. Hengli uses its strength to build a comprehensive service brand for hydraulic transmission and control systems in the field of tunnel boring equipment.