The PTFE lined butterfly valve achieves its exceptional performance through its PTFE (Polytetrafluoroethylene) lined seat and valve plate. The advanced material unites mechanical strength with unmatched chemical resistance. The valve operates effectively in harsh mediums including acids, alkalis, salts, oxidants, reductants and organic solvents which makes it suitable for chemical, petroleum, medicine, food, steel melting, papermaking and water and electricity systems.
The main characteristic of this valve is its PTFE lining which is a high-performance fluoropolymer that is known for its excellent chemical resistance, low friction coefficient, and good temperature endurance. This lining acts as a protective layer between the valve’s metal parts and the flowing fluid, thus protecting the valve from potential corrosion or damage due to harsh media.
The difference between PTFE lined butterfly valve and rubber lined butterfly valve？
The PTFE (Polytetrafluoroethylene) Lined Butterfly Valve features a high-performance fluoropolymer lining which provides exceptional chemical resistance and low friction coefficient and excellent temperature endurance. The PTFE Lined Butterfly Valve excels in corrosive chemical and acid applications because it demonstrates both durability and operational efficiency.
The Rubber Lined Butterfly Valve contains a rubber lining which provides flexibility and wear resistance. The lining creates a tight seal and reduces vibration which makes it suitable for handling abrasive slurries and non-corrosive media such as water and air.
What media conditions are PTFE lined butterfly valves used for?
These valves are specifically designed to tackle aggressive and corrosive media conditions. The PTFE lining forms a protective barrier between the valve’s metal components and the passing fluid, effectively safeguarding the valve against potential corrosion or damage. This makes them ideal for applications involving a wide range of corrosive chemicals, including strong acids, alkalis, solvents, and other harsh substances.
Pneumatic actuator working principle:
Double acting
(Counterclockwise)
Compressed air to Port 2 forces the pistons outwards, causing the output shaft to turn counterclockwise, while the air is being exhausted from Port 4.(Clockwise) Air to Port 4 forces the pistons inwards, causing the pinion to turn clockwise while the air is being exhausted from Port 2.
Single acting
(Clockwise)
Loss of air pressure, the stored energy in the springs forces the pistons inwards,the pinion turns clockwise, while air is being exhausted from Port 4.
(Counterclockwise)
Compressed air to Port 2 forces the pistons outwards, causing the output shaft to turn counterclockwise, while the air is being exhausted from Port 4.(Clockwise) Air to Port 4 forces the pistons inwards, causing the pinion to turn clockwise while the air is being exhausted from Port 2.
Single acting
(Clockwise)
Loss of air pressure, the stored energy in the springs forces the pistons inwards,the pinion turns clockwise, while air is being exhausted from Port 4.
