Mother-daughter refuelling system: The ideal concept for transporting and distributing natural gas in regions without an existing natural gas pipeline system
A system of this type provides a means of supplying natural gas to remote stations that are not connected to the local gas grid without having to go to the expense and effort of installing the necessary infrastructure. The mother-daughter refuelling system represents a virtual pipeline.
Mother station (online station)
The concept of the mother station is based on the CNG compressor types used in the MFS and CFS series.
All of the storage systems and refuelling equipment in the BAUER portfolio can be combined with the compressor models of the mother station.
The modular way in which the system is designed and built makes it possible to dimension the mother station so that, in accordance with prevailing refuelling requirements,
It can support medium and high daily CNG capacities of up to 1800 passenger cars/day for the MB7200 mobile storage systems to be filled.
Dimensioned based on the MFS, CFS SMALL, CFS LARGE or CFS ECO series, the mother station can be enclosed inside a concrete or steel housing.
Daughter station (offline station)
The CFS 22.9 DS booster daughter station has been developed and successfully introduced for this special application.
Its primary task is to make the best possible use of the natural gas stored in the MB7200 mobile storage system under high pressure to fill its own cylinders and for further refuelling purposes.
When the mobile storage system is at high pressure, the daughter station will also allow vehicles to be refuelled directly from the mobile storage system. This concept enables high daily capacities to be reached.
MB 7200 mobile storage system
The MB 7200 storage system provides mobile cascaded high-pressure storage for a natural gas capacity of 2400 m³. Integrated refuelling equipment is provided for filling at the mother station and emptying at the daughter station.
Mother-daughter refuelling systems can be designed with tree or more mobile storage systems depending on requirements, thus safeguarding 100% availability of natural gas at the offline or daughter station.
All the information you need at your fingertips!
The BAUER compressor blocks have been designed specifically for CNG applications. Exceeding the requirements of all international safety standards, they are characterised by their high energy efficiency and reliability under the most demanding conditions. Read more
High-pressure gas treatment system
The high-pressure gas treatment system (high-pressure filter) is installed downstream of the compressor on the pressure side. Its primary function is to effectively remove excess moisture and possible oil deposits from the natural gas. Read more
Sound insulation and weather protection
The entire unit is integrated inside a housing made from concrete or steel for sound insulation and weather protection.
This provides the best possible protection against the most extreme ambient conditions and, thanks to the use of air handling units or heating systems, can be used in temperature ranges of ±55°C.
Tailored to meet your individual needs, our housings can be fitted with additional important options such as protection against sandstorms.
Filling and refuelling control
Filling and refuelling control regulates the priority in which the high-pressure storage system is filled. During refuelling, it also regulates the sequence in which gas is withdrawn from the high-pressure storage system. Read more
During technical parts approval testing in the factory prior to delivery, the TÜV carries out comprehensive pressure and safety testing as well as testing the electrical equipment.
The mother station ( 1 ) is connected to the gas grid. It supplies compressed natural gas to the special MB7200 mobile storage system ( 3 ) via integrated refuelling equipment.
The mobile storage system is transported to the remote offline (daughter) station ( 2 ).
On arrival there, the storage system is emptied to supply the daughter station with natural gas. Both the mother station and the daughter station are equipped with fill posts ( 4 ) so that vehicles can be refuelled.
All of the series in the mother-daughter refuelling system are modular by design. They can be expanded relatively easily and at reasonable cost and have been designed for high capacity performance at various pressure stages.
Capacity overview: Mother station
Free delivery [Nm³/h]
(0°C, 1013 mbar)
Gas intake pressure [barg]
CFS 23.10 DUO II
CFS 23.12 DUO II
CFS 24.11 DUO II
CFS 24.12 DUO II
CFS 26.10 DUO II
CFS 26.12 DUO II
CFS 52.10 DUO II
CFS 52.12 DUO II