Description
PTFE lined pneumatic butterfly valve
The top PTFE lined pneumatic butterfly valve available on the market can be found in this product. The valve body consists of cast iron and ductile iron and aluminum and stainless steel and CF8 and CF8M and CF3M materials for achieving maximum strength and durability. The valve disc consists of stainless steel material with PTFE or PFA or F4 coatings and stainless steel stem construction.
The valve operates within a 2″ to 24″ (50mm to 600mm)N16 and ASME Class 150 and AS 4087 PN 10/PN 16 size range and features PTFE seats with EN 1092 PN 6/PN10/P and JIS 5K/10K and ISO5211 top flange compatibility. The valve operates within -40 °C to + 180 °C temperature range based on pressure and medium and material selection. The valve exists in three configuration styles which include wafer and LUG and Flange types.
Description
Body: Cast Iron, Ductile Iron, Aluminum Stainless Steel,CF8,CF8M,CF3M
Disc: Stainless Steel+PTFE, Stainless Steel+PFA, Stainless Steel+F4
Stem: Stainless Steel
Seats: PTFE
Size: 2″ – 24″ (50mm – 600mm)
Flange accommodation: EN 1092 PN 6/PN10/PN16
ASME Class 150
AS 4087 PN 10/ PN 16
JIS 5K/10K
Top flange:ISO5211
Temperature range: -40 °C to + 180 °C (depending on pressure, medium and material)
Body style: wafer,LUG,Flange
Applications: Highly Corrosive, Toxic Media
Pneumatic Actuator
Output Torque 10Nm to 8000 Nm
Control: Double acting,Single acting normally closed, acting,Single normally open
Pneumatic accessories: Solenoid valve, limit switch box , filter, E/P positioner, hand wheel
All double acting and spring return units are suitable for both on/off and throttling applications. Actuators which can be actuated with other media such as hydraulic oil or water are also available as an option.
1, Two independently adjustable travel stop screws and a cam on the outputshaft to permit precise bidirectional adjustment of movement in both the open and closed positions for quarter turn valves (+5° to -5° limit adjustment)
2, Integral porting
3, Standard units have anodized aluminum bodies with polyester coated end caps.
4, Special coatings and materials available for corrosive environments
5, NAMUR accessory compatible
FAQs
What is PTFE lined butterfly valve?
PTFE lined butterfly valves consist of a thin PTFE lining made from polytetrafluoroethylene. The valve operates to manage fluid flow of gases and liquids and slurry substances through pipes. The butterfly-shaped disk of this valve provides a smooth and reliable seal during shutdown operations and its full-bodied design enables it to handle high pressure when in the open position.
What material is used for butterfly valve liners?
The selection of butterfly valve liners depends on application requirements because they can be made from rubber or metal materials.
General purpose butterfly valves use rubber as their liner material. The liner materials used in butterfly valves include nitrile butadiene rubber (NBR) and ethylene propylene diene monomer (EPDM) and ptfe pfa and other elastomers. The materials provide strong chemical resistance properties.
What is the difference between lined and unlined valves?
Special protective layers made from polymers including Teflon (PTFE) and PFA and FEP extends operational life under demanding conditions that include high temperature and pressure corrosive and abrasive media such as slur cover the inner surfaces of lined valves. The protective linings provide superior wear and abrasion resistance whichries. The inner surfaces of unlined valves remain unprotected but stainless steel and nickel-plated brass materials provide corrosion resistance when used together.
What media conditions are pfa ptfe lined butterfly valves used for?
The main application of PFA/PTFE-lined butterfly valves exists in environments where operators need to manage corrosive substances at elevated temperatures. The materials demonstrate resistance to aggressive chemicals as well as operating temperatures between -20°F and 500°F. The valves consist of a complete valve body structure which receives an epoxy coating for corrosion protection and increased strength.
