Indus Industrial Group supplies heavy-duty Dual-Stage and Low-Flow Pilot-Controlled Pressure Reducing Valve (PRV) Stations engineered across nominal diameters from DN80 to DN500 in pressure classes PN16 and PN25 according to AWWA C530 and EN 1074-5 standards. Designed specifically for District Metered Areas (DMAs) and municipal distribution networks across Iraq that experience extreme flow turndown ratios between peak daytime consumption and minimum nighttime flows, these stations incorporate a primary pilot-operated control valve paired with an integrated secondary low-flow bypass regulator to eliminate seat hunting, cavitation, and chatter at near-zero flow.
| Pricing Verification | Commercial Quote on Demand (RFQ) |
| Governing Standards | AWWA C530 / EN 1074-5 / ISO 10522 / BS EN 1267 |
| Main Valve Diameters | DN80 to DN500 (Primary High-Flow PRV Flanged EN 1092-2) |
| Bypass Valve Diameters | DN25 to DN80 (Secondary Low-Flow High-Precision PRV) |
| Pressure Classes | PN16, PN25 (Bar) |
| Flow Turndown Ratio | Up to 100:1 operational flow turndown capability |
| Downstream Set Range | 1.5 Bar to 10.0 Bar (Independently adjustable spring pilots) |
| Body & Bonnet Material | Ductile Iron EN-GJS-500-7 with Fusion-Bonded Epoxy (≥250 µm) |
| Pilot System & Tubing | Stainless Steel AISI 316 with Needle Speed Regulators |
| Pressure Stability | ± 0.1 Bar across entire 1% to 100% flow operating envelope |
| Companion Equipment | Supplied with Upstream/Downstream Pressure Gauges & Isolating Cocks |
| Sector & Division | Water & Wastewater (Div 01) |
| Parent Category | Pressure Reducing Valves |
Municipal District Metered Area (DMA) pressure zoning, city distribution network leakage reduction, high-rise building dual-flow risers, residential subdivision boundary control, and commercial water metering chambers across Baghdad, Erbil, Basra, Sulaymaniyah, and Najaf.
Dual-Stage and Low-Flow Pilot Controlled PRV Stations provide the definitive engineering solution for municipal pressure management and non-revenue water (NRW) reduction in urban District Metered Areas (DMAs) across Iraq. In cities like Baghdad, Erbil, Basra, and Kirkuk, municipal water consumption fluctuates wildly: during hot summer daytime hours, flow rates reach thousands of cubic meters per hour; during nighttime hours (2:00 AM to 5:00 AM), flow drops to a mere trickle. Standard large single-seat PRVs forced to operate at less than 5% of their rated capacity suffer from violent valve chattering, pressure hunting, rapid seat erosion, and diaphragm fatigue.
Indus dual-stage PRV stations solve this challenge by integrating two parallel control lines onto a single pre-assembled skid or manifold. During low nighttime demand, the large primary PRV closes bubble-tight, and an auxiliary high-sensitivity direct-acting or pilot-operated secondary regulator handles the low flow with pinpoint accuracy (±0.1 Bar). As morning demand rises, the primary PRV opens smoothly to deliver bulk municipal flow. Both stages operate autonomously using line hydraulic pressure without requiring electrical motors or PLC controllers.
Constructed from heavy-wall ductile iron (EN-GJS-500-7) with marine-grade stainless steel (AISI 316) pilot trim and dual upstream/downstream isolating valves, the assembly is coated with fusion-bonded epoxy (min 250 µm). Staged at the Erbil Heavy Yard, Baghdad Central Logistics Depot, and Basra Port Hub, Indus supplies complete dual-stage PRV stations with pressure gauges, air release vents, and full EN 10204 3.1 inspection certification.
Municipal water networks experience extreme demand drops at night. A large single-seat PRV (e.g., DN300) trying to throttle tiny nighttime flows will chatter violently against its seat, generating pressure waves and destroying the diaphragm. A dual-stage station routes night flow through an auxiliary small regulator, eliminating chatter and maintaining stable pressure.
Yes. Indus supplies optional dual-setpoint electronic or mechanical timer pilots that automatically switch between a higher daytime pressure (e.g., 4.0 Bar) and a lower nighttime pressure (e.g., 2.5 Bar), dramatically cutting nighttime pipe burst rates and water losses.
Yes. Indus supplies turnkey skid-mounted PRV stations complete with primary valve, bypass regulator, isolating gate valves, upstream strainers, dismantling joints, and pressure gauges mounted on structural steel frames ready to drop into concrete chambers.
