PFA, PTFE, and FEP-lined fluoroplastic valves
Introduction
- Product Description
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Our company specializes in manufacturing PFA, PTFE, and FEP‑lined fluoropolymer valves, which combine excellent corrosion resistance with superior mechanical properties. We offer custom non‑standard designs to meet specific requirements and are well suited to a wide range of demanding operating conditions, ensuring that we fully satisfy our customers’ unique needs.
PTFE (Polytetrafluoroethylene) Lined Fluoroplastic Valves:
Known as the “King of Plastics,” it is the most widely used fluoroplastic lining material. It is tightly bonded to the valve body through hot‑pressing and sintering processes, exhibiting exceptional chemical inertness. It can withstand virtually all strong acids and strong bases—except molten alkali metals and chlorine trifluoride—and also boasts outstanding resistance to both high and low temperatures.
It can withstand long-term operating temperatures from –200°C to 260°C, exhibits a low coefficient of friction and excellent electrical insulation, and features a uniform lining that is well-suited for various types of valves. It is widely used in applications such as chemical feedstock transport, pickling, and wastewater treatment, offering outstanding cost‑performance and making it a mainstream choice. However, its mechanical properties are relatively low, machining is challenging, and it is not suitable for high‑frequency impact or severe negative‑pressure conditions.
PFA (perfluoroalkoxy resin) lined fluoroplastic valves:
Modified PTFE fluoroplastics retain all corrosion‑resistant properties while offering melt processability. Employing melt extrusion or injection molding, they enable the formation of complex internal linings with convenient processing, making them the preferred choice for high‑end, demanding service conditions.
Long-term operating temperature range: −200°C to 260°C. It exhibits superior high‑temperature mechanical properties compared to PTFE, with extremely low permeability and exceptional cleanliness, making it ideal for demanding applications such as high‑purity fluid handling in the semiconductor industry, sterile process control in pharmaceuticals, and exposure to high‑temperature concentrated acids.
FEP (fluorinated ethylene propylene, also known as F46) lined PTFE valves:
A copolymer of PTFE and hexafluoropropylene, it retains excellent corrosion resistance while offering improved processability; it can be melt-extruded or injection-molded, with a cost-performance profile intermediate between PTFE and PFA.
It can withstand long-term operating temperatures from −85°C to 150°C, with mechanical properties and chemical stability comparable to PTFE. It exhibits high toughness and excellent processability, making it suitable for medium- and low-temperature, highly corrosive service conditions. It can replace PTFE in fluid‑control applications that demand both high machining accuracy and superior toughness.
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PFA, PTFE, and FEP-lined fluoroplastic valves
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