{ "$schema": "https://indusiraq.com/schemas/agentic-product-dossier-v1.json", "endpoint_meta": { "version": "1.0", "protocol": "AISO-Headless-Agent-Dossier", "generated_at": "2026-10-17T17:32:28+03:00", "audit_cycle": "Autonomous Monthly Rolling Review (Assigned Day 17 of Month)", "canonical_html_url": "https://indusiraq.com/product/resilient-swing-check-valves-lever-counterweight", "endpoint_json_url": "https://indusiraq.com/product/resilient-swing-check-valves-lever-counterweight.json", "authority": "Indus Industrial Group - Iraq Central Engineering & Procurement Directorate", "indexing_directive": "noindex, follow, noarchive, nosnippet (Canonical authority belongs to HTML URL)", "rate_limiting": "unrestricted (Open public access for autonomous agents & procurement bots)", "encoding": "UTF-8" }, "product_identity": { "id": 44, "sku": "IND-PRD-000044", "name": "Resilient Swing Check Valves with Lever & Counterweight (DN50–DN1000, PN10 / PN16 / PN25, EN 1074-3)", "slug": "resilient-swing-check-valves-lever-counterweight", "status": "active", "views_count": 4, "inquiries_count": 0, "created_at": "2026-09-11T22:40:48+03:00", "updated_at": "2026-10-17T17:32:28+03:00", "last_audited_at": "2026-10-17T17:32:28+03:00", "review_cadence": "Monthly Continuous Verification" }, "classification": { "sector": { "id": 1, "code": "SEC-01", "name": "Water & Wastewater", "slug": "water-wastewater", "url": "https://indusiraq.com/division/water-wastewater" }, "category": { "id": 11, "name": "Non-Return Check Valves", "slug": "non-return-check-valves", "market_demand": "booming", "views_count": 24, "url": "https://indusiraq.com/category/non-return-check-valves" }, "subcategory": { "id": 12, "name": "Non-Return Check Valve Systems", "slug": "non-return-check-valve-systems", "target_buyer_type": "Pump Station Engineers, Plant Operators, Pipeline Mechanical Contractors" } }, "engineering_specifications": { "Governing Standards": "EN 1074-3 / EN 12334 / BS 5153 / ISO 5208", "Face-to-Face Standard": "EN 558-1 Series 10 (DIN 3202 F6) / Series 48", "Nominal Diameter Range": "DN50 to DN1000 (Metric Flanged)", "Pressure Classes": "PN10, PN16, PN25 (Bar)", "Body & Bonnet Material": "Ductile Iron EN-GJS-500-7 (min 420 MPa tensile strength)", "Disc Material": "Ductile Iron fully vulcanized in EPDM (Potable) or NBR (Sewage)", "Body Seat Ring": "Corrosion-Resistant Bronze / Stainless Steel 316L", "Hinge Shaft": "Stainless Steel AISI 420 / AISI 316 (High Shear Strength)", "Corrosion Protection": "Fusion-Bonded Epoxy (FBE ≥ 250 µm) inside and out", "Flange Drillings": "EN 1092-2 / ISO 7005-2 (PN10 / PN16 / PN25)" }, "core_features": [ "External lever and counterweight allowing field adjustment of disc closure dynamics.", "Ductile iron body and disc (EN-GJS-500-7) compliant with EN 1074-3 and EN 12334.", "Ductile iron disc fully encapsulated in EPDM or NBR elastomer delivering bubble-tight shutoff.", "Unobstructed full-bore waterway providing maximum flow capacity with minimal head loss.", "High-tensile stainless steel hinge shaft mounted in maintenance-free low-friction bushings.", "Nominal diameter range spanning DN50 to DN1000 in PN10, PN16, and PN25 pressure ratings." ], "qualified_applications": [ "Municipal water booster pumping stations, raw river intake pump discharge lines, municipal WWTP aeration and effluent pump stations, industrial cooling circuits, and fire pumping systems across Baghdad, Erbil, Basra, Mosul, Najaf, and Karbala." ], "engineering_analysis": { "summary": "Resilient swing check valves DN50–DN1000 PN10–PN25 with external lever & counterweight per EN 1074-3. Zero backflow. Staged in Erbil, Baghdad & Basra. RFQ.", "field_analysis": "Resilient Seated Swing Check Valves equipped with external lever and adjustable counterweight represent the time-tested engineering standard for non-return flow protection in municipal pumping stations and high-pressure water mains across Iraq. Governed by EN 1074-3, EN 12334, and BS 5153 standards, these valves protect booster pumps from catastrophic reverse rotation, backflow surges, and hydraulic water hammer shocks when pumps are shut down or when sudden power outages occur on the Iraqi national electrical grid. The external counterweight can be adjusted along the lever arm to tune the closing speed, ensuring rapid disc closure before reverse flow velocity can accelerate.\n\nThe valve body and bonnet are cast from spheroidal graphite ductile iron (EN-GJS-500-7) featuring an unobstructed full-bore hydraulic waterway that minimizes turbulence and pumping head loss. The swing disc is fully encapsulated in vulcanized EPDM (for potable water) or NBR elastomer, sealing against a precision-machined bronze or stainless steel body seat ring to provide bubble-tight shutoff (Rate A per ISO 5208) even under low backpressure conditions. The hinge shaft is manufactured from high-tensile stainless steel (AISI 420 / 316) mounted on maintenance-free low-friction bronze bushings with multiple O-ring shaft seals.\n\nProtected internally and externally with electrostatically applied blue fusion-bonded epoxy (min 250 µm, WRAS certified), the valve is immune to galvanic corrosion in high-salinity Iraqi water. Staged at the Erbil Heavy Plant Yard, Baghdad Central Logistics Hub, and Basra Port Corridor, Indus supplies complete swing check valve assemblies with counterweights, protective safety cages, and EN 10204 3.1 inspection certification.", "standard_design_life": "50 Years in hyper-saline Iraq soil and desert climate (+55°C)", "inspection_standard": "Hydrostatic Pressure & Ultrasound Wall Thickness FAT Verification" }, "compliance_and_governance": { "governing_standards": [ "ISO 2531 / EN 545 - Ductile Iron Pipes & Fittings for Pressurized Potable Water Transmission (DN80–DN2600, C25–C100, Class K9/K12)", "EN 598 - Ductile Iron Sewer Pipes & Fittings with High-Alumina Cement Mortar / Polyurethane Internal Liners", "ISO 4427-2 / EN 12201-2 - Polyethylene (PE100 / PE100-RC) Pressure Pipes & Continuous Service Coils (OD 20mm–1200mm, PN6–PN25)", "EN 1796 / ISO 10639 / AWWA C950 - Glass-Reinforced Plastic (GRP) Filament-Wound Pressure Trunk Pipelines (DN300–DN3000, PN6–PN25)", "ISO 10467 / EN 14364 - GRP Gravity Sewer & Industrial Wastewater Trunk Interceptor Pipes (DN400–DN2600, SN5000–SN10000)", "GRI-GM13 / GRI-GM19 - High-Density Polyethylene (HDPE) Smooth & Double-Sided Textured Geomembrane Liners (1.0mm–2.5mm)", "EN 1074 / DIN 3352 / AWWA C509/C515 - Resilient Seated Wedge Gate Valves (DN50–DN1400) & Double Eccentric Flanged Butterfly Valves (DN100–DN2400)", "AWWA C502 / BS 750 - Municipal Pillar Dry Barrel & Wet Barrel Fire Hydrants with Traffic Breakaway Flanges (DN100 / DN150)", "EN 124-2 (Class D400 / F900) - High-Tensile Spheroidal Graphite Ductile Iron Heavy Highway & Airport Runway Manhole Covers", "EN 14525 - Wide-Tolerance Universal Straight Couplings & Metal-Grip Tensile Restraint Flange Adaptors (DN50–DN1200)", "EN 878 / EN 17034 / EN 901 - Municipal Drinking Water Grade Coagulants (Alum, PAC 30%) and Disinfection Reagents (Sodium Hypochlorite, TCCA)" ], "iraqi_ministry_approvals": [ "Ministry of Construction, Housing, Municipalities and Public Works (وزارة الإعمار والإسكان والبلديات والأشغال العامة)", "Amanat Baghdad - Baghdad Water & Sewerage Directorates (أمانة بغداد - دائرة ماء ومجاري بغداد)", "Ministry of Water Resources (وزارة الموارد المائية - جمهورية العراق)", "General Directorate of Water & Sewerage - KRG (المديرية العامة للماء والمجاري - إقليم كوردستان)", "Basra Water Directorate (مديرية ماء محافظة البصرة)", "Ministry of Oil - South Oil & Gas Water Utilities (وزارة النفط - مشاريع المياه الصناعية)" ], "technical_capabilities": [ "Comprehensive 24-Category Supply Ecosystem: Over 134 Master B2B Products in active inventory covering pipes, valves, pumps, liners, fittings, and chemicals.", "Iraqi Ministerial Pre-Qualification: Pre-approved material specifications conforming to MoCH, Amanat Baghdad, and MoWR general conditions of contract.", "Exhaustive Engineering Submittal Dossiers: Fast 24-hour turnaround on complete Material Approval Requests (MAR), compliance matrices, and CAD shop drawings.", "Certified European & International Metallurgy: 100% EN 10204 3.1 factory inspection certificates and third-party inspection (SGS/TÜV/BV) available on all lots.", "Extreme-Environment Corrosion Protection: High-alumina cement (HAC), 100% solids polyurethane, fusion-bonded epoxy (min 300 μm), and 2.5% carbon black UV stabilization.", "Integrated Field Equipment Rental & Support: Turnkey availability of CNC hydraulic butt welders (up to 1200mm) and automated hot-wedge geomembrane field welders." ], "material_certification": "EN 10204 3.1 Mill Test Certificate & Quality Assurance Dossier" }, "logistics_and_supply_chain": { "dispatch_hubs": [ "Baghdad Central Logistics Depot (Abu Ghraib / Camp Sarah Industrial District, Baghdad)", "Erbil Heavy Infrastructure Staging Yard (Makhmur Road / Gwer Industrial Corridor, Erbil)", "Basra Port Gateway & Free Zone Terminal (Khor Al-Zubair & Umm Qasr Commercial Free Zone, Basra)" ], "geographical_coverage": "All 18 Iraqi Governorates + Kurdistan Regional Government (KRG)", "supported_incoterms": [ "EXW (Factory / Central Hub Gate)", "FOB (Khor Al-Zubair / Umm Qasr Port)", "CIF (Umm Qasr Port, Basra)", "DDP (Delivered Duty Paid to Project Site - Iraq)" ], "transit_insurance": "Full transit risk covered under Indus Sovereign Logistics Protocols", "lead_time": "Immediate stock dispatch (24-48 hrs) or programmed project delivery lots" }, "commercial_procurement_terms": { "commercial_model": "Official B2B EPC & Industrial Wholesale Supply", "pricing_model": "Request for Quote (RFQ) / Project Bill of Quantities (BOQ) Tender Pricing", "currency_settlement": [ "USD", "IQD" ], "minimum_order_quantity": "Standard Commercial Lot / Full Truckload (FTL) / 20ft-40ft Container", "payment_methods": [ "Irrevocable Confirmed Letter of Credit (LC)", "Direct Bank Wire (T/T)", "Corporate Approved Purchase Order (PO)" ], "warranty_and_return": { "warranty_period": "12 Months Manufacturer Warranty", "design_life": "50-Year Design Envelope", "return_policy": "ReturnInStore - Factory Acceptance Non-Conformance Replacement Guarantee" } }, "technical_faqs": [ { "question": "How does adjusting the counterweight position prevent water hammer in Iraqi pump stations?", "answer": "Moving the counterweight along the lever changes the torque applied to the disc. In systems prone to slam, moving the weight forward accelerates closure so the disc seats precisely at the moment forward flow reaches zero velocity, preventing reverse water velocity from slamming the disc shut and generating water hammer.", "q": "How does adjusting the counterweight position prevent water hammer in Iraqi pump stations?", "a": "Moving the counterweight along the lever changes the torque applied to the disc. In systems prone to slam, moving the weight forward accelerates closure so the disc seats precisely at the moment forward flow reaches zero velocity, preventing reverse water velocity from slamming the disc shut and generating water hammer." }, { "question": "Can a hydraulic damper be added to large diameter check valves?", "answer": "Yes. For diameters of DN300 and above, Indus supplies an optional external oil hydraulic dampening cylinder connected to the lever arm. The damper allows the disc to close rapidly through the first 90% of its stroke and then cushions the final 10% of closure, eliminating mechanical slam entirely.", "q": "Can a hydraulic damper be added to large diameter check valves?", "a": "Yes. For diameters of DN300 and above, Indus supplies an optional external oil hydraulic dampening cylinder connected to the lever arm. The damper allows the disc to close rapidly through the first 90% of its stroke and then cushions the final 10% of closure, eliminating mechanical slam entirely." }, { "question": "Can these check valves be installed in both horizontal and vertical pipelines?", "answer": "Standard swing check valves are installed in horizontal lines. For vertical lines with upward flow, the lever and counterweight can be re-orientated on-site to assist closure against gravity. Vertical downward flow is not permitted.", "q": "Can these check valves be installed in both horizontal and vertical pipelines?", "a": "Standard swing check valves are installed in horizontal lines. For vertical lines with upward flow, the lever and counterweight can be re-orientated on-site to assist closure against gravity. 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Zero backflow. Staged in Erbil, Baghdad & Basra. RFQ.", "inLanguage": "en", "isPartOf": { "@type": "WebSite", "@id": "https://indusiraq.com/#website", "name": "Indus Industrial Group - Iraq", "url": "https://indusiraq.com/" }, "author": { "@type": "Organization", "@id": "https://indusiraq.com/division/water-wastewater#directorate", "name": "Indus Division 01: Water & Wastewater Engineering Directorate" }, "publisher": { "@type": "Corporation", "@id": "https://indusiraq.com/#corporation", "name": "Indus Industrial Group - Iraq", "logo": { "@type": "ImageObject", "url": "https://indusiraq.com/assets/images/indus_logo.png" } }, "mainEntity": { "@id": "https://indusiraq.com/product/resilient-swing-check-valves-lever-counterweight#product" }, "breadcrumb": { "@id": "https://indusiraq.com/product/resilient-swing-check-valves-lever-counterweight#breadcrumbs" }, "keywords": "Resilient Swing Check Valves with Lever & Counterweight (DN50–DN1000, PN10 / PN16 / PN25, EN 1074-3) Iraq, Resilient Swing Check Valves with Lever & Counterweight (DN50–DN1000, PN10 / PN16 / PN25, EN 1074-3), swing check valve iraq, non return valve baghdad, check valve with counterweight erbil, pump non return valve basra, ductile iron check valve pn16 pn25, en 1074 check valve dn200 dn300, indus check valves tender, water infrastructure iraq, ductile iron pipes baghdad, hdpe pipe supplier erbil, municipal water procurement iraq, grp sewer pipe basra, gate valve supplier iraq" }, { "@type": "TechArticle", "@id": "https://indusiraq.com/product/resilient-swing-check-valves-lever-counterweight#technical-brief", "headline": "Technical Field Evaluation: Resilient Swing Check Valves with Lever & Counterweight (DN50–DN1000, PN10 / PN16 / PN25, EN 1074-3)", "name": "Engineering Datasheet & Field Compliance Dossier", "description": "Resilient Seated Swing Check Valves equipped with external lever and adjustable counterweight represent the time-tested engineering standard for non-return flow protection in municipal pumping...", "articleBody": "Resilient Seated Swing Check Valves equipped with external lever and adjustable counterweight represent the time-tested engineering standard for non-return flow protection in municipal pumping stations and high-pressure water mains across Iraq. Governed by EN 1074-3, EN 12334, and BS 5153 standards, these valves protect booster pumps from catastrophic reverse rotation, backflow surges, and hydraulic water hammer shocks when pumps are shut down or when sudden power outages occur on the Iraqi national electrical grid. The external counterweight can be adjusted along the lever arm to tune the closing speed, ensuring rapid disc closure before reverse flow velocity can accelerate.\n\nThe valve body and bonnet are cast from spheroidal graphite ductile iron (EN-GJS-500-7) featuring an unobstructed full-bore hydraulic waterway that minimizes turbulence and pumping head loss. The swing disc is fully encapsulated in vulcanized EPDM (for potable water) or NBR elastomer, sealing against a precision-machined bronze or stainless steel body seat ring to provide bubble-tight shutoff (Rate A per ISO 5208) even under low backpressure conditions. The hinge shaft is manufactured from high-tensile stainless steel (AISI 420 / 316) mounted on maintenance-free low-friction bronze bushings with multiple O-ring shaft seals.\n\nProtected internally and externally with electrostatically applied blue fusion-bonded epoxy (min 250 µm, WRAS certified), the valve is immune to galvanic corrosion in high-salinity Iraqi water. Staged at the Erbil Heavy Plant Yard, Baghdad Central Logistics Hub, and Basra Port Corridor, Indus supplies complete swing check valve assemblies with counterweights, protective safety cages, and EN 10204 3.1 inspection certification.", "image": [ "https://indusiraq.com/assets/images/indus_logo.png" ], "datePublished": "2026-09-11T22:40:48+03:00", "dateModified": "2026-10-17T17:32:28+03:00", "author": { "@type": "Organization", "@id": "https://indusiraq.com/division/water-wastewater#directorate", "name": "Indus Division 01: Water & Wastewater Engineering Directorate" }, "publisher": { "@type": "Corporation", "@id": "https://indusiraq.com/#corporation", "name": "Indus Industrial Group - Iraq", "logo": { "@type": "ImageObject", "url": "https://indusiraq.com/assets/images/indus_logo.png" } }, "inLanguage": "en", "about": { "@id": "https://indusiraq.com/product/resilient-swing-check-valves-lever-counterweight#product" } }, { "@type": "FAQPage", "@id": "https://indusiraq.com/product/resilient-swing-check-valves-lever-counterweight#faq", "mainEntity": [ { "@type": "Question", "name": "How does adjusting the counterweight position prevent water hammer in Iraqi pump stations?", "acceptedAnswer": { "@type": "Answer", "text": "Moving the counterweight along the lever changes the torque applied to the disc. In systems prone to slam, moving the weight forward accelerates closure so the disc seats precisely at the moment forward flow reaches zero velocity, preventing reverse water velocity from slamming the disc shut and generating water hammer." } }, { "@type": "Question", "name": "Can a hydraulic damper be added to large diameter check valves?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. For diameters of DN300 and above, Indus supplies an optional external oil hydraulic dampening cylinder connected to the lever arm. The damper allows the disc to close rapidly through the first 90% of its stroke and then cushions the final 10% of closure, eliminating mechanical slam entirely." } }, { "@type": "Question", "name": "Can these check valves be installed in both horizontal and vertical pipelines?", "acceptedAnswer": { "@type": "Answer", "text": "Standard swing check valves are installed in horizontal lines. For vertical lines with upward flow, the lever and counterweight can be re-orientated on-site to assist closure against gravity. Vertical downward flow is not permitted." } } ] } ] } }