1. The Cylinder: The cylinder is used to store CNG at a working pressure of 200 bar. It is fitted with a shut-off valve and a safety burst disc. The cylinders are type approved by the Chief Controller of Explosives, Government of India.

2. The Vapour Bag: Fitted onto the cylinder, the Vapour Bag is used to enclose the cylinder valve and the pipes connecting it and is vented out of the car.

3.The High Pressure Pipe: This High Pressure Pipe connects the refuelling valve to the CNG Cylinder and Pressure Regulator.

4.The Refuelling Valve: The Refuelling Valve is used to refuel the CNG cylinder.

5.The Pressure Regulator: The Pressure Regulator has a Solenoid Valve to shut-off gas supply to the engine. The CNG stored at a high pressure in the cylinder is reduced to just below atmospheric pressure by this unit. This negative pressure is also a safety feature that will not allow gas to pass through when the engine is not running.

6.The Gas-Air Mixer: The Gas-Air Mixer is a unique component, specially designed to suit each engine model. It precisely meters gas fed into the engine.

7.The Petrol-Solenoid Valve: The Petrol-Solenoid Valve is used to cut off petrol supply to the engine when it is run on CNG.

8.The Selector Switch: The Selector Switch is fitted at the dashboard, enabling the driver to choose either the CNG mode or the petrol mode of operation. The electronics built into this unit also ensures safety by switching off the gas solenoid whenever the engine is switched off. It also serves as a fuel indicator for the quantity of CNG available in the cylinder.