Expert CNG Center
WZ-107, Gali No-21, Sant Garh, Outer Ring Road Flyover Piller Number 46
West Delhi, Delhi-110018
Established : 2010

Frequently Asked Question on CNG Kits

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Q-1. What is CNG?
CNG stands for compressed natural gas. It is gaseous fuel and is a mixture of hydrocarbons mainly Methane. For use in Automobiles as fuel, it is compressed to a pressure of 200-250 Kg/cm2 to enhance the vehicle onboard storage capacity.

Q-2. Is CNG safe?
Yes, it is safe. The properties of CNG make it a safe fuel. It is lighter than air, so in case of a leak, it just rises up and disperses into the atmosphere. Besides, a high auto-ignition temperature of 540 degrees centigrade as against patrols 360 degrees centigrade makes it a safe fuel. Also, in case of a leak, if the CNG concentration in the air is less than 5% and more than 15%, the gas will not burn even in the presence of a spark.

Q-3. What is involved in converting a vehicle to a CNG-friendly one?
All spark-ignited engines can be converted to CNG, but a specially designed conversion kit is required for the purpose. The kit consists of a cylinder to be fixed in the boot of the car and other equipment to allow gas flow into the engine.

Q-4. Can a car, fitted with a CNG conversion kit, run on Petrol after its CNG gets over?
Yes, after conversion to CNG the vehicle can run on petrol whenever desired simply by flicking a switch on the dashboard.

Q-5. What is the cost of converting a vehicle to a CNG-friendly one?
The cost of converting a vehicle to CNG depends on its type and make. Your Cost shall be between 25K to 45K depending on Kit Type

Q-6. What are the dimensions and weight of a CNG cylinder?
CNG cylinders are manufactured from a special steel alloy and are seamless in construction. Their compact size allows them to easily fit even in a small car. An empty CNG cylinder with a 50 litre-water-carrying capacity weighs 48 kg, with a length of 835 mm and a diameter of 316 mm. The 50-litre capacity cylinder is the one most regularly used; cylinders with 45 litres, 55 litres, 60 litres and 65-litre capacity are used as well.

Q-7. What is the capacity of a cylinder, and mileage from one fill? How does one get to know the quantity of CNG left in the cylinder?
Undercity road conditions and may vary from vehicle to vehicle and driving habits.

Q-8. What is the pressure of CNG in a cylinder? Is refuelling of a cylinder safe, given the pressure?
CNG cylinders are designed and built in such a way so as to withstand high pressure. The maximum pressure in a CNG cylinder is up to 200 kg/cm2 (g) (about 2840 psi[g]). CNG cylinders are safe as they are manufactured as per specific requirements and tested before use, in accordance with international specifications and standards and they are duly approved by the Chief Controller of Explosives. Moreover, these have been provided with a safety burst disc such that in case of inadvertent high-pressure/high temperature at the time of filing or at any other time, this disc is ruptured and pressure released.

Q-9. How much will be the saving after conversion to CNG?
The fuel bill on the basis of average running of vehicle is reduced by 50 per cent approximately after conversion of CNG at the present price of CNG & Petrol in Pune.

Q-10. Does the CNG kit require servicing?
CNG kit is safe and simple. It gives years of trouble-free operation. It does not require frequent servicing. Just as for all other fuels, it is advised to have routine services. An authorized person should be consulted for service. As per Gas Cylinder Rules, 1981, the cylinder should undergo hydro-stretch testing every 5 years to check pressure tolerance.

Q-11. Does CNG have any harmful effect on the engine?
Owing to CNG distinct features, it does not contaminate or dilute crankcase oil, giving a new lease of life to the engine. The absence of any lead content in CNG helps avoid lead fouling of plugs, thereby enhancing plug life. One of the important benefits of CNG is that upon entering the engine in the form of a gas (and not as a spray or mist like other fuels), it does not disturb the presence of lubricating oil in the engine and reduces chances of wear and tear.

Q-12. Can a diesel vehicle be converted to CNG?
We Expert CNG Center Convert Only Petrol Car to CNG, However, a diesel vehicle can be converted to run on CNG, but the conversion cost is higher than the conversion of petrol vehicles and under the current technology it can not run on dual fuel mode.

Q-13. Why are exhaust fumes so small in CNG-run vehicles?
CNG is an environment-friendly fuel. Natural gas is mainly composed of methane and its exhaust emissions consist of water vapours and a small fraction of carbon monoxide. The absence of carbon and other particulates result in a negligible amount of harmful elements in exhaust fumes.

Q-14. How does large-scale CNG usage benefit the country?
CNG emits less carbon dioxide and other pollutants as compared to liquid fuels. Thus, CNG contributes to lowering air pollution, also helps in improving the Balance of Payments by acting as a substitute for imported liquid fuels, provides more business and job opportunities with the opening up of a new sector, and is competitively priced, it appeases motorists.

Q-15. In which countries are natural gas vehicles popular?
Natural gas as a vehicle fuel has a long and established record in Europe, Canada, India, New Zealand, Australia and the USA. Other countries such as Japan, Mexico, Malaysia, Pakistan, and Bangladesh are recognizing the benefits of CNG and plan to expand its use.

Q-17. Where is the tank placed in the car?
IT is fixed in the luggage space of your car. It is fastened with a metal strap so that it does not move while the car is running. As per BIS code, it has to be a permanently fitted tank and should be an integral part of the vehicle (As per BIS 14899 for fuel tank container and as per LPG/CNG Control order).

Q-18. Can an existing LPG vehicle run on CNG?
An LPG-fuelled vehicle will not run on CNG as the two fuels are different from each other, have differing calorific values and need different air-fuel ratios for combustion. CNG has to be stored at a relatively higher pressure in a cylinder than LPG, so the same cylinder cannot be used for both gases. A vehicle will need specific conversion for CNG operation.

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“The team at Expert CNG Centre is top-notch. They were professional, friendly, and extremely knowledgeable. They helped me understand what needed to be done to my car, and they completed the work quickly and efficiently.”
Star Rating Reviewed By : Sanjeev Kumar, Delhi
“Best CNG kit Fitting Center in all over Delhi. This workshop place is very cool and staff management is superb. I Just fitted Mijo CNG kit in my friend car. The price was too affordable and cheaper than anywhere else. I will suggest to the public who wants to install CNG, must visit here at Vikash Puri Outer Ring Road just near Flyover..”
Star Rating Reviewed By : Ashish Ranjan, Delhi
“Nice experienced professional where they were able to diagnose and rectify the problem with CNG fuel injector for my Swift desire.”
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WZ-107, Gali No-21, Sant Garh, Outer Ring Road Flyover Piller Number 46, West Delhi, Delhi-110018