Thermal Expansion Valve 1.For R22,R134A,R407A,R507/404A 2. easy to change driving head and valve disc 3.MOP Expansion ValveOperating principle After remove the Seal Cap, theAdjusting Stem can be turned. If it is turned clockwise, will increasesuperheat, if it is turned counterclockwise, superheat will bedecreased. For each turn of the Adjusting Stem, the superheat will bechanged about 4. Set ...