CNG Solenoid operated cylinder valve

[Atul Nigam]

Can some one reply to me the benefits of using a solenoid operated valve on CNG Cylinders instead of a manual valve ? When were they introduced in Europe or USA ?

[Curtis]

Re: CNG Solenoid operated cylinder valve

I would depend on the application. The obvious benefit of a selenoid operated valve is that it would allow automatic, computer controlled, or remote operation. In a low tech environment... and again, depending on the application... a manual valve may be desireable.

What is the application?

[milly555]

Re: CNG Solenoid operated cylinder valve

Because of environmental concerns and emissions laws and regulations, manufacturers of motor vehicles are searching for a clean burning and cost efficient fuel to use as an alternative to gasoline. Natural gas is one candidate for such a purpose, and many vehicles have been converted to natural gas as a fuel source. Typically, the natural gas is stored on board the vehicle in compressed form in one or more pressurized cylinders.Valves which control the supply of compressed natural gas to the engine of a vehicle are exposed to large variations in environmental conditions. For example, wide variations in temperatures may be encountered. This variation in temperature may result in the nominal working pressure in a gas cylinder to vary several hundred up to a few thousand pounds per square inch. Thus, the control valve must be able to handle high gas pressures without failure.

For more information about cylinder valve,please refer to
ecvv.com/product_directory/Cylinder-Valve.html

[larrycng]

Re: CNG Solenoid operated cylinder valve

Greetings and welcome aboard to CNG Chat Milly555.

To answer your question and maybe put to rest some of your concerns, NFPA-52 is the standard in the U.S. for CNG vehicle equipment safety standards. In the new version , 2010 in section 4.3.1, the components in the system are required to be approved by the appropriate and recognized testing organization; Underwriters, Labortory (UL), Canadian Standards Association (CSA), etc. The components are required, sometimes by law, to meet specific testing standards created by law or by industry standards; American National Standards Institute (ANSI) or U.S.D.O.T regulations such as FMVSS 304 (Federal Motor Vehicle Safety Standard 4304 -- 49 CFR 571.304). In the case of CNG vehicle components National Fire Protection Association standard 52, Vehicle Gaseous Fuel System Code, section 6.2.2.1 requires components in the engine compartment be designed to work in a temperature range of -40 deg F to 250 deg F. All components in the system have similar requirement.

In the case of NFPA 52, it is an industry standard, but in some cases in will have the force of law. California, and some other states, have adopted NFPA -52 into the state statutes. In other words, if you don't comply, you are breaking the law and can be prosecuted. The same is true of CGA C-6.4 (cylinder inspection standard).

Hope this helps

Larrycng