Butterfly valve sealing 1

[nisogas]

Hello,

which is the proper sealing material of a butterfly valve, for use in petrol pipelines?

 

[JLSeagull]

Get a copy of some recent literature regarding oxygenated fuels such as the following:

6American Petroleum Institute, Effects of Oxygenated Fuels and Reformulated Diesel Fuels on Elastomers and Polymers in Pipeline/Terminal Components: API Publication 1132, 1994, American Petroleum Institute.

Stevens, R. D., Fuller, R. E., Fuel Permeation Rates of Elastomers after Changing Fuel: SAE Technical Paper Series No. 970307, 1997, Society of Automotive Engineers (SAE).

Aloisio, Salvatore, Performance of Fluorocarbon Elastomers in MTBE/Fuel Blends: SAE Technical Paper Series No. 940956, 1994, Society of Automotive Engineers (SAE).

Stahl, W. M., Stevens, R. D., Fuel-Alcohol Permeation Rates of Fluoroelastomers, Fluoroplastics and Other Fuel Resistant Materials, 1992, Society of Automotive Engineers (SAE).

Abu-Isa, I. A., Effects of Ethanol/Gasoline and Methyl T-Butyl Ether/Gasoline Mixtures on Elastomers. In: Rubber Chemistry and Technology, 51(169), 1983, Rubber Chemistry and Technology.

Nerasian, A., Compatibility of Fuel Handling Rubbers with Gasoline/Alcohol Blends. In: Elastomerics, 26 October 1980, Elastomerics.

Dupont Elastomers, Viton (seal materials): Figures 5 and 6 and Table II on relative resistance to increasing concentrations of oxygenated fuels and value ranking of elastomer performance - Excerpted from Dupont Elastomers "Leak Performance of Reformulated Fuels and Oxygenated ...".

Thes papers are listed in the EXECUTIVE SUMMARY, Literature Review, Impact of Gasoline Blended with Ethanol on the Long-Term Structural Integrity of Liquid Petroleum Storage Systems and Components.

 

[Ashereng]

We use gate and slab gates in our crude oil lines. We don't use butterfly valves.

Also, if you need the valve to be fire safe, you would need a metal to metal seal.

We are also starting to use ball valves (with metal seats).