Proportion-Air, Inc. manufacturers electronic air pressure regulators and air flow control valves. We go where others fear to tread, vacuum control, vacuum through positive pressure, absolute pressure, inches of water column, or direct control up to l000psi. Our years of engineering and design experience gives us the confidence to take on the most problematic and exacting applications.
You didn't mention that saturated steam becomes superheated when you drop the pressure of it (conservation of energy). You didn't mention this and so I assume this isn't being taken into account?
Temperature of superheated steam as a supply is too high for Burling products. Max temp for elastomers is 420-450F (216-232C). Saturated steam passing through a regulator/valve can create superheated steam. Superheated steam in this case simply means the water is completely vaporized. Reducing saturated steam pressure through a regulator/valve also drops the temperature. Superheated steam is not mentioned because any superheated steam* (vaporized water) conditions created by passing through the reducing regulator/valve have minimal effects. *A Mollier diagram shows what temps and pressures are needed to get either type of steam. Above the saturation line at a specific pressure, heat added to saturated steam can create superheated steam. It takes high temperature to superheat steam. According to chart, superheating steam requires a little over 450C (842F) at 0.5 bar (7.25 psi), over 200C (392F) at 0.1 bar (1.45 psi).
