Indus Industrial Group supplies heavy-duty Tilting Disc Check Valves equipped with External Adjustable Counterweight and Controlled Hydraulic Oil Dashpot Damper across nominal diameters from DN200 to DN1400 in pressure classes PN16 and PN25 according to EN 12334 and AWWA C508 standards. Engineered specifically for large municipal water transmission pump stations, river intake booster complexes, and high-head raw water lines across Iraq, these valves feature an inclined seating face and an aerofoil-profile pivoted disc that pivots open with minimal head loss and closes softly without hydraulic water hammer slam.
| Pricing Verification | Commercial Quote on Demand (RFQ) |
| Governing Standards | EN 12334 / AWWA C508 / BS EN 1074-3 / ISO 5208 |
| Face-to-Face Standard | EN 558-1 Series 14 (DIN 3202 F4) / Series 15 (F5) |
| Nominal Diameter Range | DN200 to DN1400 (Large Transmission Sizes) |
| Pressure Classes | PN16, PN25 (Bar) |
| Body & Disc Material | Ductile Iron EN-GJS-500-7 (min 420 MPa tensile strength) |
| Seat Trim | Stainless Steel AISI 316L Weld Overlay / Bronze Gunmetal Ring |
| Hydraulic Damper | External Double-Acting Oil Dashpot Cylinder with Needle Valve Speed Control |
| Pivot Shaft | High-Strength Stainless Steel AISI 420 / 431 / 316 |
| Flange Standards | EN 1092-2 / ISO 7005-2 (PN16 / PN25 Drilled) |
| Corrosion Protection | Fusion-Bonded Epoxy (FBE ≥ 250 µm) WRAS Drinking Water Certified |
| Sector & Division | Water & Wastewater (Div 01) |
| Parent Category | Non-Return Check Valves |
High-head municipal water booster stations, river raw water intake pump discharge manifolds, thermal power plant main cooling water circuits, and major inter-city water transfer corridors across Baghdad, Erbil, Basra, Wasit, and Nineveh.
Tilting Disc Check Valves equipped with external adjustable counterweights and hydraulic oil dashpot dampening cylinders represent the premier non-return surge suppression technology for large-diameter municipal water transmission pump stations across Iraq. In high-head pumping facilities pumping water from the Tigris, Euphrates, or Zab rivers (e.g., pumping mains exceeding DN600 up to DN1400), sudden electrical power cuts cause violent reverse flow waves that slam standard check valves shut with immense mechanical force, cracking pipe bells and destroying expensive pump impellers. The tilting disc valve eliminates this risk through an aerofoil disc geometry pivoted around an eccentric pivot axis.
The valve seat is inclined at an angle of 55 to 70 degrees from the pipe axis, significantly reducing disc angular travel (only 40° to 50° travel compared to 80° for standard swing check valves). As forward flow decelerates, the aerofoil disc begins closing rapidly under the action of the external lever and counterweight. During the final 10% to 15% of the closing stroke, the external double-acting hydraulic oil dashpot cylinder engages, cushioning disc travel and allowing it to seat smoothly and silently against the metal-to-metal or resilient O-ring seat with zero mechanical shock.
Cast from high-tensile spheroidal graphite ductile iron (EN-GJS-500-7) with stainless steel pivot shafts (AISI 420/316) mounted on self-lubricating bronze bushings, the valve is coated with blue fusion-bonded epoxy (min 250 µm). Staged at our Erbil Heavy Plant Yard, Baghdad Central Depot, and Basra Port Hub, Indus supplies complete tilting disc check valve packages with full EN 10204 3.1 inspection certification.
The external dashpot cylinder contains hydraulic oil with an adjustable needle valve. As the disc swings closed, it travels freely and quickly through the first 90% of travel. In the final 10%, the dashpot piston contacts the lever, forcing oil through the restricted needle valve to cushion the disc onto its seat without metal slam or hydraulic shockwaves.
Yes. Commissioning engineers can adjust both the position of the counterweight along the lever arm and the needle valve orifice on the hydraulic dashpot, allowing precise tuning to match the exact surge characteristics of the pipeline.
Indus maintains standard transmission sizes (DN300 to DN800) in stock at our Erbil, Baghdad, and Basra staging yards for immediate dispatch, while large sizes up to DN1400 are scheduled with dedicated heavy logistics convoys.
