BrewTa2 wrote:The only question I have is: How would propane effect the seals that may be designed to function with water and not necessarily propane. Don't know if there are different materials used, but I'd look into it. Other than that, apply current to solenoid - valve opens, regardless of what is going through it.
The seals are made of NBR (Nitrile) thus they should be fine.
Nitrile (buna n) is a copolymer of butadiene and acrylonitrile, a compound that is commonly used in o-rings. It is the acrylonitrile that brings the strong resistant to petroleum products to the combination. As more acrylonitrile is put into the mixture of the two components, the resistance of the nitrile o-rings to petroleum products increases. Unfortunately, at the same time, the low temperature flexibility of the nitrile o-rings decreases with more acrylonitrile. Thus, compounding nitrile (buna n) becomes a balancing act. If one wants good flexibility at low temperatures, some hydrocarbon fuel and petroleum oil resistance at high temperatures will have to be sacrificed.
Because of the resistance to fuel and oil, and the reasonable cost, more o-rings are made from nitrile (buna n) than any other elastomer. In addition to use with petroleum oils and fluids, nitrile o-rings are used for cold water, silicone greases and oils, Di-ester base lubricants and ethylene glycol base fluids. They do not do well with ozone, sunlight and exposure to weather.
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