Indus Industrial Group supplies heavy-duty Dual Plate Wafer Check Valves engineered across nominal diameters from DN50 to DN1200 in pressure classes PN16, PN25, and PN40 according to API 594 and EN 12334 standards. Featuring a compact wafer body with dual semicircular spring-loaded plates pivoting around a central vertical hinge pin, these valves achieve rapid, low-inertia closure that prevents backflow and dampens water hammer in high-head pumping stations, water treatment plants, and industrial cooling loops across Iraq.
| Pricing Verification | Commercial Quote on Demand (RFQ) |
| Governing Standards | API 594 / EN 12334 / ASME B16.34 / ISO 5208 |
| Face-to-Face Standard | API 594 / EN 558-1 Series 16 (ISO 5752 Wafer) |
| Nominal Diameter Range | DN50 to DN1200 (Metric Schedule) |
| Pressure Classes | PN16, PN25, PN40 (ASME Class 150 / 300) |
| Body Construction | Ductile Iron EN-GJS-500-7 / Cast Steel WCB / SS CF8M |
| Plates Material | Stainless Steel CF8M (AISI 316) / Aluminum Bronze / Ductile Iron |
| Torsion Springs | Inconel X-750 / Stainless Steel AISI 316 (High cycle life) |
| Hinge & Stop Pins | Stainless Steel AISI 316 / 17-4PH |
| Resilient Seat | EPDM Vulcanized Seat Ring (WRAS Drinking Water Certified) / NBR |
| Flange Compatibility | EN 1092-2 PN10/16/25 & ASME B16.5 Class 150/300 |
| Sector & Division | Water & Wastewater (Div 01) |
| Parent Category | Non-Return Check Valves |
Centrifugal pump discharge headers, water treatment plant filter manifolds, high-rise building booster pump skids, industrial cooling water loops, and fire pump backflow prevention across Baghdad, Erbil, Basra, Mosul, and Karbala.
Dual Plate Wafer Check Valves represent the modern, lightweight, and compact non-return valve standard for municipal booster stations, water treatment plant galleries, and industrial pump skids across Iraq. In high-capacity pumping facilities in Baghdad, Erbil, Basra, and Kirkuk, traditional swing check valves require large installation dimensions, heavy foundation supports, and create severe slamming shocks upon pump shutdown. Dual plate check valves sandwich directly between standard pipe flanges, reducing valve weight by up to 80% and face-to-face length by over 75% compared to flanged swing check valves.
The internal hydraulic mechanism utilizes two semi-circular plates (cast from bronze, stainless steel CF8M, or ductile iron) suspended on a central stainless steel hinge pin and driven by independent torsion springs (Inconel or 316 stainless steel). When forward pump flow begins, the plates open smoothly; as flow decelerates, the torsion springs push the plates closed dynamically before flow reversal can occur, preventing reverse water velocity from slamming the plates shut and eliminating water hammer. Resilient EPDM or metal-to-metal seats provide bubble-tight shutoff (Rate A per ISO 5208).
The retainerless body design eliminates external body penetration plugs, completely removing potential fugitive leak paths to the atmospheric environment. Finished with heavy fusion-bonded epoxy (min 250 µm), Indus dual plate check valves are stocked across our Erbil Heavy Plant Yard, Baghdad Central Logistics Depot, and Basra Port Hub with full EN 10204 3.1 inspection certification.
Yes. Because the plates are spring-assisted and centrally hinged, the valve functions flawlessly in vertical upward flow pipelines, horizontal pipelines, and inclined lines without relying on gravity to seat the plates.
Standard dual plate check valves have drilled holes in the valve body sealed with threaded plugs to hold the hinge pins. Over time in aggressive Iraqi soils, these plugs can corrode and leak. The retainerless design secures pins internally with zero external body penetrations, guaranteeing 100% leak-free integrity.
Indus stocks dual plate check valves from DN50 to DN400 in high volume, and large sizes up to DN1200 across our Erbil, Baghdad, and Basra facilities for 24-hour nationwide dispatch.
