Indus Industrial Group provides heavy-duty Concentric Rubber-Lined Double Flanged Butterfly Valves engineered across nominal diameters from DN50 to DN1200 in pressure ratings PN10 and PN16 according to EN 593 and ISO 10631 standards. Designed with vulcanized or replaceable molded EPDM or NBR elastomeric elastomer body liners that wrap around the flange faces, these valves completely isolate the ductile iron valve body from the line fluid, eliminating the need for separate flange gaskets during installation. Engineered for municipal distribution, wastewater treatment, and general industrial water service across Iraq, they feature precision-polished stainless steel or ductile iron discs providing bi-directional drop-tight sealing.
| Pricing Verification | Commercial Quote on Demand (RFQ) |
| Governing Standards | EN 593 / ISO 10631 / BS 5155 / API 609 Category A |
| Face-to-Face Standard | EN 558-1 Series 13 (Short Flanged) / ISO 5752 |
| Nominal Diameter Range | DN50 to DN1200 (Metric Schedule) |
| Pressure Classes | PN10, PN16 (Bar) |
| Body Material | Ductile Iron EN-GJS-450-10 / EN-GJS-500-7 |
| Disc Material | Stainless Steel AISI 316 / CF8M / Ductile Iron with Epoxy Coating |
| Liner Material | High-Grade EPDM (Drinking Water WRAS) / NBR (Sewage/Oil) |
| Stem Material | Stainless Steel AISI 420 / AISI 316 |
| Flange Compatibility | EN 1092-2 / ISO 7005-2 (PN10 / PN16 Drilling) |
| Operating Temperature | -10°C to +80°C (EPDM) / -10°C to +70°C (NBR) |
| Sector & Division | Water & Wastewater (Div 01) |
| Parent Category | Flanged Butterfly Valves |
Municipal water distribution branch networks, wastewater treatment plant aeration manifolds, industrial pump suction isolation lines, cooling tower water circulation, and irrigation pumping stations across Baghdad, Erbil, Basra, Karbala, and Najaf.
Concentric Rubber-Lined Flanged Butterfly Valves provide a highly reliable, economical solution for flow isolation and throttling in municipal water distribution networks, wastewater treatment facilities, and industrial cooling loops throughout Iraq. Compliant with EN 593, ISO 10631, and API 609 standards, the concentric design positions the valve disc and stem symmetrically along the centerline of the pipe bore and the elastomer body liner. The resilient rubber seat cartridge extends over the flange sealing faces, creating an integral full-face elastomeric gasket that prevents internal fluid contact with the ductile iron body and eliminates the requirement for separate companion gaskets.
The disc is cast from high-grade ductile iron (with nylon or epoxy coating) or corrosion-resistant stainless steel (AISI 304/316), featuring precision-machined spherical sealing edges that seat smoothly into the resilient liner with uniform compression. The one-piece or two-piece stainless steel stem is supported by multiple low-friction PTFE/bronze bearings and secondary O-ring shaft seals, ensuring zero external atmospheric leakage even under frequent modulating cycles in water treatment dosing applications.
In Iraqi municipal projects where raw water carries dissolved salts and suspended sediments, the resilient EPDM liner resists abrasion and chemical scaling. Staged at our Erbil Heavy Yard, Baghdad Central Logistics Hub, and Basra Port Corridor, Indus supplies concentric flanged butterfly valves with multi-position lockable manual levers, enclosed worm gearboxes, and pneumatic/electric actuators for immediate project dispatch.
No. The elastomeric body liner wraps around both flange faces, acting as an integrated full-face rubber gasket. Applying separate gaskets is unnecessary and can cause uneven bolt torque; the valve flanges seal directly against the mating pipe flanges.
For potable drinking water, WRAS-approved EPDM is recommended due to its hygiene certification and chlorine resistance. For wastewater, sewage containing fats/greases, or oily water, NBR (Nitrile) is selected to prevent hydrocarbon swelling.
Standard sizes up to DN600 are physically stocked in high volume at our Erbil, Baghdad, and Basra staging yards for 24-hour dispatch. Large transmission sizes (DN700 to DN1200) are staged for project deployment across all 19 governorates.
