A PTFE (Polytetrafluoroethylene) lined hose refers to a type of hose where the inner lining or core is made of PTFE material. The PTFE lining provides excellent chemical resistance, low friction, and non-stick properties. Here are some key aspects of PTFE lined hoses:

1. PTFE Lining: The inner core of the hose is lined with PTFE, a synthetic fluoropolymer known for its outstanding chemical resistance and temperature stability. PTFE offers excellent resistance to a wide range of chemicals, acids, solvents, and corrosive substances.
2. Smooth Bore or Convoluted: PTFE lined hoses can have either a smooth bore or a convoluted (corrugated) structure. Smooth bore hoses have a smooth inner surface, while convoluted hoses have a series of ridges and valleys. The choice between the two depends on the specific application requirements.