... tube with brand name of Durkflex, used in HVAC&R system.On the basis of the elastomeric foam with ... insulating in the field of heating, ventilating, air conditioning and refrigerating (HVAC & R). Durkflex provides efficient method of preventing undesirable heat ... water systems, cold and hot water plumbing, refrigerated pips, air conditioning ductwork and equipment.Features or Performance1, Low and ...