Description
PTFE Lined Diaphragm Valve Manufacturer & Exporter in India
FlowBiz PTFE Lined Diaphragm Valves are specialized flow-control valves designed for bi-directional isolation and precise throttling of highly aggressive chemicals, toxic fluids, and abrasive slurries. Featuring a heavy-duty fluoropolymer body lining combined with a flexible, dual-layer PTFE/EPDM diaphragm, these weir-type valves completely separate the internal operating mechanism from the line media—guaranteeing zero fluid contamination, long service life, and bubble-tight shut-off in demanding chemical environments.
Key Performance Features & Weir-Style Engineering
- Complete Chemical Isolation: The flexible diaphragm completely isolates the stem, bonnet, and moving mechanical parts from process media, preventing stem leakage and atmospheric contamination.
- Thick Seamless Body Lining: High-density PTFE or PFA lining (minimum 3mm to 5mm thickness) is molded and mechanically keyed into the metal body casing to prevent liner vacuum collapse under thermal cycling.
- Streamlined Weir Body Contour: Low-pressure-drop weir design provides smooth flow characteristics, precise manual throttling capabilities, and self-draining properties in horizontal pipelines.
- Dual PTFE/EPDM Diaphragm Design: Features a chemically inert virgin PTFE face backed by a high-resilience EPDM cushion ring that ensures uniform sealing force against line pressure surges.
Technical Specifications & Standards
Specification Parameter | Standard Options & Engineering Range |
Size Range | 1/2" (DN15) to 12" (DN300) |
Pressure Class / Rating | ASME Class 150 / PN10 / PN16 |
Body Construction | Ductile Iron (A395), Cast Carbon Steel (WCB), Stainless Steel (SS304/SS316) |
Body Lining Options | Virgin PTFE, PFA, FEP, PVDF |
Diaphragm Material | Virgin PTFE Face with EPDM or Neoprene Rubber Backing |
Operation Modes | Manual Handwheel, Pneumatic Actuator (Double Acting / Spring Return) |
End Connections | Flanged Ends (ASME B16.5 RF / DIN 2501 / BS 4504) |
Design & Testing | Designed to BS 5156 / MSS SP-88; Spark tested at 20kV; Tested to API 598 |
Target Applications & Chemical Handling
FlowBiz PTFE Lined Diaphragm Valves are deployed across chemical processing units, chlor-alkali plants, sulfuric and nitric acid dosing, steel pickling lines, pharmaceutical acid recovery, and industrial wastewater treatment.
Contact FlowBiz Exports for technical datasheets, actuator sizing charts, or an instant commercial quotation for your chemical process line.