4Matic Valves manufactures Lined valves using fluorocarbons such as PFA, PVDF, PTFE, PFA-AS (antistatic), as per customer request. These valves are also offered with Pneumatic and Electric actuator operation. Fluorinated Ethylene Propylene (FEP) is a resin coating that has a very high chemical and temperature resistance. FEP is highly inert and will withstand exposure to most chemicals and solvent
s such as Acetic acid, Acetone, Alcohols, Ammonia, Aromatic solvents, Beer, Chlorine, Citric acid, Detergents, Diesel, Fluorinated refrigerants, Fruit juices, Glycols, Hydrogen Peroxide, Hydrochloric acid, Nitric acid, Petrol, Gasoline, Kerosene and Sulphuric acid. FEP has a high melting point and can be used in environments as high as 200°C (392°F). FEP is often specified for liquid level measurements applications such landfill leachate monintoring, fuel tank level and chemical storage tanks. PerFluoroAlkoxy (PFA) offers similar properties to FEP, but is considered more of a premium resin. PFA is preferred when extended service is required in hostile environments involving chemical, thermal, and mechanical stress. PFA offers high melt strength, stability at high processing temperatures, excellent crack and stress resistance, a low coefficient of friction, and more than 10 times the Flex life of FEP. It has high resistance to creep and retention of properties after service at 500°F (260°C), with useful properties at -320°F (95°C). PFA is used in the same types of applications as those listed above for FEP. PRODUCT FEATURE
Easy Maintanance
Very aggressive and corrosive media are safely shut-off and controlled
seals tightly at full differential pressure even with very high switching cycles and varying temperatures
Excellent bubble-tightness
Economic and easy assembly of all actuator types
TECHNICAL DESCRIPTION
Because of its molecular structure, traditional PTFE cannot be processed by melting, but must be compressed into shapes and heated under pressure (sintered). In contrast, FEP and PFA are melt-processable by conventional thermoplastic processing methods, including injection, transfer, blow, and compression molding and by extrusion. FEP DESCRIPTION
TetraFluorEthylene-Perfluorpropylene (FEP) is produced by copolymerization of tetrafluoroethylene and hexafluoropropylene. It is a relatively soft thermoplastic with lower tensile strength, wear resistance, and creep resistance than many other engineering plastics. However, it is chemically inert and has a low dielectric constant over a wide frequency range. FEP possesses a very high degree of stress crack resistance, a low coefficient of friction, exceptional dielectric properties, heat resistance, retention of properties after service at 400°F (204°C) with useful properties at -454°F (-270°C), and meets FDA 21CFR.177.1550. FEP has high transparency (with good transmittance of UltraViolet and visible wavelengths.) It has long term weather ability and excellent resistance to ozone, sunlight and weather. FEP offers the lowest refractive index of all thermoplastics with low light reflection (the same as water.) Important applications are linings for pipe and chemical processing equipment, and numerous wire and cable applications. PFA DESCRIPTION
PerFluoroAlkoxy (PFA) offers similar properties to FEP, but is considered more of a premium resin.
