Low cost butterfly valves without the rubber lining

[p6g2p6]

Hi,
I am looking for a 24" butterfly valve for a low to medium pressure service. Every valve I have been quoted has been the resilient seated style with the rubber lining extending out onto the flange face. I'd prefer a valve with no rubber on the flange faces, however it seems that the only valves of that style (high performance) are extremely expensive and have ridiculous lead times. Should I keep looking or am I wasting my time trying to find a cheaper butterfly valve with steel flanges? Also, why is it that the cheaper ductile and cast iron butterfly valves only come with the rubber lining? The valve we are replacing is a double flanged ductile iron butterfly valve and there are full face gaskets installed so I am assuming that it is not rubber lined. This valve is 50 years old, but are these not common anymore?

 

[LittleInch]

Define "low to medium pressure". My low might be your very high and vice versa.

What's the issue exactly?

Is it actually flanged or a wafer design?

 

[GBTorpenhow]

You are maybe looking for an AWWA C504 "seat-in-body" type design? Try Mueller, Pratt, Dezurik, etc.