we have an oil flooded screw compressor for propylene refrigeration service that trips frequently on high discharge temperature(78 deg c, ) (usually when the plant is running at turndown)what changes do u guys think can be made to lower the discharge temperatures(lowering suction pressure,increasing economizer duty etc). I have also noticed that propylene coming to the compressor from the evaporators is sometimes highly superheated at the suction conditions. what could be the possible reason? is this the correct forum or should i be posting somewhere else?