We only use the internationally recognized refrigeration parts. For example,Compressor are German Bitizer, Japanese Mycom. Valves are Danfoss, Emerson. All the pressure vessels are build in house in strict compliance to American Society of Mechanical Engineers (ASME). And our welders and technicians are ASME certified. We have the state of art plasma welding machine, rollers, radiography test equipment to ensure the pressure vessels for the refrigeration system are reliable and meet the international pressure vessel codes.