If someone could help me on this. Is it recommended to use only a globe type valve for steam service (On-Off & control application) or could we use Ball valves for the same as well.For Natural gas services is it recommended to go for Ball valves only irrespective of the line size (above 10")Could we use Fire safe Butterfly valves.For Oxygen service is there any recommendation on the type of valve to be used.Hope someone can help me on this.For steam and Gas - Try and use the Tripple Offset Valves (Tyco - Vanessa and others)We are using them succesfully for both applications.Do not know about Oxygen!! For O2 applications, u might wish to consider the fluid medium:i. O2-Gas: valves of ductile iron/SS with rubber (i.e. NBR) seating will suffice;ii. O2-Liquid (-297DegF): 316SS disc with teflon seating will be good.For steam service, it depend on the pipe sizes, pressures and temperatures of your application. If you are talking about less than 100 psi steam and pipe sizes less than 2", then commercially available threaded globe valves (with stainless trim) are the most cost effective solution and will provide excellent throttling service. Using a high performance metal seated butterfly valve would cost big bucks and are really only good for 2-position service.If you are talking about 2" to 6" pipes, then commercial flanged globe/cage valves are excellent for steam. DeZURIK makes a good pressure balanced globe/cage valve for steam up to 150 psid.Ball valves would be OK for on/off but not modulating control, in smaller pipe sizes. The new "characterized" ball valves available in the commercial industry are not rated for steam.

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