Sigma Polymers Engineering co. is an ISO 9001:2008 approved company established in the year 2008 with factory equipped with well-designed amenities to manufacture plastic lined systems. Since the beginning, we use DuPont™ Teflon® make raw material for processing of fluoropolymer PTFE (Polytetrafluoroethylene) pipes and fittings, Teflon® lined valves and other corrosion resistant piping system and pipe fittings integral to the chemical and pharmaceutical processing industries.
All Sigma manufactured Lined Pipes, Pipe Fittings and Lined Valves are backwards traceable from the finished component to the manufacturing tests, processes and lining materials. Each spool has one flange stamped with the reference of the liner batch used in its construction. This provides traceability back to the liner manufactured, the tests undertaken and the materials certification of the polymer. FEP / PFA moulded products likewise are stamped with a mould reference which again provides traceability back to the manufacturing and test activities and the material certification of the polymers used.
Following lining materials are available. Their respective maximum working temperature is shown below
- PTFE 250o C,
- FEP 180o C,
- PFA 250o C
- PVDF 150o C,
- HDPE 70o C,
- PP7 100o C
PTFE / PFA / FEP Lined Valves:
We are one of the leading manufacturers, suppliers and exporters of high-quality PTFE Lined Valves, Teflon® PFA Lined Valves, and FEP Lined Valves like Ball Valves, Flush Bottom Valves, Non-Return Valves, Butterfly Valves, and Plug Valves.
Lined Pipes and Fittings:
We are also an industry leader in manufacturing and Supply of Lined Pipes, Fittings, and Lined Accessories in India. All PTFE pipe spools are manufactured using in-house produced PTFE paste extruded liner, whilst in FEP/PFA lined fittings we use the virgin material.
All products are painted with a corrosion resistant two coat epoxy primer from outside. All our lined piping systems are provided with vent holes drilled through the steel body. They serve to inspect after production as well as indicate leaks while working. We recommend keeping vent holes always open. Closed vent holes may cause collapsing of liners due to the permeated gas pressure between lining and housing.