CNG hydraulic daughter station is also built in the area without natural gas pipeline. It reserves gas in the CNG semi-trailer which gets gas from mother station through the CNG HPU semi-trailer. It can just refuel NGV only. Though be different from compressor daughter station, the hydraulic daughter station use the hydraulic oil to expel out CNG from CNG daughter station trailer into NGV by use of Hydraulic Power Unit(HPU).

Floor Area: About 500~1500 m
Work pressure: 20 Mpa
Capacity: 1000-4000 Nm3/h
Equipment installation Period: Maximum 3 days