Pure PTFE Packing (Lubricated)

A universal use all chemical packing made from pure PTFE fibre yarns having Duplex Braid construction to increase dimensional stability treated with inert high temperature resisting lubricant to resist migration and to display compressibility and recovery characteristics. Sigma 81 packing is safe, more flexible, and non-toxic. Fluids can be sealed with a minimum of gland pressure, there is less friction as well as heat build-up. It is an inert, virtually indestructible packing, having a lower co-efficient of friction with good compressive strength. Dimension stability ensures trouble free operation. Service & Application : A good packing to seal against concentrated Acids, Alkali solutions, Agressive organic / inorganic Chemical Rotary and reciprocating plant pumps & valves, oils, corrosive gases, food- processing and pharmaceutical industries. Dyestuffs, synthetic resins, paints, pulp & paper sector chemicals. Equipment glands where no contamination is allowed. Not recommended to use on molten metals and gaseous fluorine. Application Parameters : Equipment : Check and needle valve stems, reciprocating rods, rams and plungers , centrifugal pumps & equipment rotary applications Temperature : -4500 F(-1000Cto +300oC) pH range : 0-14 Shaft speed : to 2320 rpm Pressure : to 300 psi (20 bar) rotary/ centrifugal; to 2200 psi (150 bar) valves Prime features : • Clean non contamination and graphite free. • Long maintenance free service life. • Minimal shaft wear and leakage. • Superior performance over other pure white packings. • Ideal for food processing applications. • Pliable, wear-resistant and dimensionally stable. • Resists most chemicals & caustic media. • Rugged and non-toxic. • High density, dimensionally stable - very little water absorption