Armstrong Engineering Associates Inc is an Employee Owned company with offices in West Chester PA, USA, Scotland, and Singapore. Armstrong Chemtec Group operates a world wide sales force. Full details of all products and company information is on www.marmstrong-chemtec.com and www.polysiliconequipment.com. Armstrong Chemtec is the worlds largest supplier of industrial chlorine vaporizers and sole recommended of hydrocarbon vaporizers to refinery process licensors UOP and Axens. We have supplied equipment to most of the world's major Engineering Contractors. Armstrong designs proprietary continuous cooling crystallizers and ethylene vaporizers as well as Exd explosion proof electric process heaters and electric heaters for POLYSILICON and vaporizers for TCS, DCS and CS. Armstrong makes custom electric IMPEDANCE heaters for VHT and high Pressure applications.