A CNG Mother Station is normally directly connected with the Natural Gas Pipeline. At the CNG Mother Station, natural gas is received at a low pressure and then compressed upto a pressure of 250 barg with the help of a reciprocating compressor in order to enhance the on board storage capacity of vehicle. Then, it is dispensed to vehicles locally through CNG dispensers at a pressure of 200 barg. Typically a CNG Mother Station consists of following equipments:

1. Gas Filtering & Metering Skid

2. Sulfur Removal Unit (optional)

3. Knock-out Drum/ Buffer Tank

4. Blow-down Drum

5. CNG Compresor Unit

6. Dehydration Unit

7. Gas Storage Well/ Storage Cascade

8. Priority Control Panel

9. CNG Dispenser

 

Mother Station:

Mother Station has the facility to refuel the mobile cascades/CNG trailer in addition to the local demand of vehicles. these mobile cascades are then dispatched to other Dauthter Stations, which do not have the connectivity of pipeline.

Daughter Station:

Daughter stations do not have the connectivity of natural gas pipeline. At these stations, compressed natural gas (CNG) is transported through mobile cascades (bunch of cylinders mounted on trucks) at a pressure of 240-250 barg and then dispensed to vehicles through CNG dispensers. In fact, under stopped condition of CNG Compressor, a mother station acts as a Daughter Station and dispensed the gas from the local storage cascades.

S. N.	Item	Design			Remarks
1	Name	Skid-mounted compressor unit
2	Model	D-5.25/3-250
3	Rows	2
4	Cylinders	4
5	Stages	4
6	Control model	Automatic
7	Usage	Pressure Boosting for CNG station
8	Working medium	Natural gas
9	Driven motor	YB series	Rated power:	250 kW	dⅡBT4
			Speed	1485 r/min
			Rated Voltage	380 V
10	Design speed	1485 rpm
11	Flowrate, m3/min	5.25 (@ Ps=3 barg)
12	Performance parameters	Inlet pressure, barg		1~3
		Capacity: Nm3/h (20 °C, 0.101325 MPa.A)		1200
		Shaft power, KW		107
13	Driven model	Flexible coupling directly driven
14	Inlet pressure	1~3 barg
15	Outlet pressure	250 barg
16	Inlet temperature	≤30 ℃
17	Outlet temperature (after cooling)	Not higher 15℃ than the environment temperature
18	Cooling method	Air cooled
19	Lube method	Oil-free lube structure and operation
20	Installation way	Whole skid-mounted

 

Q1: Which data shall provide to us if you need a compressor proposal?

1) Gas compositions

2) Suction/ inlet pressure

3) Discharge/ outlet pressure

4) Suction/ inlet temp.

5) Discharge/ outlet temp

6) Flowrate/ capacity

7) Local conditions(such as local temperature, water supply, power supply, transportation, etc.)

8) Other requirements (such as noise level, codes and standards, etc)

Q2: after-sale service?

We have the internationla service team. the buyer shall invite our service team to the fied to commissionning and start-up.

and the warranty period is 18 months after delivery or 12 months after commissioning, whichever comes first.