High-Performance Isolation Series for Industrial Corridors
Engineered for minimal friction wear and drop-tight bi-directional sealing. Factory direct export solutions fully optimized for Turkish municipal waterworks and industrial cooling loops.
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OEM AWWA C504 Double Eccentric Butterfly Valve for Turkey WaterworksExplore Specs -
OEM Flange Type Double Offset Butterfly Valve (TS EN 593 Standard)Explore Specs -
OEM Double Eccentric Wafer High Performance Valve for Turkey Chemical HubsExplore Specs -
OEM Short Pattern U-Shape Double Eccentric Valve (Compact Trenchless Line)Explore Specs
Turkey’s Strategic Demand for Advanced Double Eccentric Architecture
The Republic of Turkey represents one of the most critical cross-continental engineering nexuses globally. Rapid expansion in municipal infrastructure, energy generation, and cross-border maritime lines requires valves with proven wear resistance and structural longevity.
DSI Water Transmission & GAP Initiatives
State Hydraulic Works (DSİ) mandates resilient water distribution networks. Standard concentric valves suffer high elastomeric friction under pressure classes of PN16 to PN25. Double eccentric geometry lifts the disc instantly from the seat, minimizing tear and extending plant lifecycle beyond 25 years.
Geothermal & Thermal Power in Western Anatolia
In geothermal hubs such as Denizli and Aydın, mineral-rich brines and thermal cycles degrade conventional sealing faces. Double offset butterfly valves manufactured from ductile iron (GGG40/GGG50) or nickel-aluminum bronze with SS316 welded body seats guarantee absolute zero-leakage control.
Petrochemical & Refinery Complexes
Centres like TÜPRAŞ refinery expansions and Petkim complexes in Aliğa require rigorous compliance with API 609 Cat B standards. Our OEM double eccentric high-performance units deliver certified bi-directional shut-off for cooling water intake and secondary process cooling manifolds.
Double Offset Kinematics: Eliminating Scuffing & High Operating Torque
Understanding the internal dynamics of double eccentric geometry compared to conventional valves specified in historical Turkish tenders.
First Eccentricity: Shaft Offset
The shaft axis is placed behind the plane of the sealing face. This uninterrupted 360-degree perimeter allows the implementation of continuous stainless steel or resilient seal rings without stem penetration vulnerabilities.
Second Eccentricity: Bore Offset
The shaft center is slightly offset from the pipeline center axis. During the initial opening stroke (1°–3°), the disc lifts entirely free from the body seat ring, eliminating sliding friction and significantly minimizing drive torque requirements.
Retention & Field Adjustability
Retaining rings with external locking bolts allow seal replacement without disassembling the disc from the shaft. The resilient T-cross section elastomer remains clamped firmly against hydrodynamic flow forces.
| Parameter / Specification | Conventional Concentric Valve | ZFA Double Eccentric Butterfly Valve (OEM) | Operational Advantage in Projects |
|---|---|---|---|
| Seat Wear Mechanism | Continuous wiping friction against elastomer | Cam-action lift-off during first 2°–5° rotation | 500% longer seal cycle life in heavy duties |
| Operating Torque | High break-away torque (seat compression) | Reduced dynamic torque via aerodynamic disc profile | Downsizes electric/pneumatic actuator investment |
| Body Seat Material | Vulcanized or loose rubber boot | Micro-finished stainless steel (SS304/SS316/Inconel) weld overlay | Immunity to erosion, cavitation, and seat tearing |
| Pipeline Compliance | Limited to standard dimensions | EN 558 Series 13, 14, 15 / AWWA C504 / TS EN 593 | Direct drop-in replacement across Turkish pipelines |
| Bi-directional Tightness | Pressure-assisted in single direction | Equal Class A bubble-tightness both directions | Safeguards reversible pumping stations & grids |
Engineered OEM Supply Chain for International Contractors
How we solve supply disruptions, custom branding, material tracing, and rapid container shipments through ports like Ambarlı (Istanbul), Mersin, and Aliağa (Izmir).
Complete EN 10204 3.1 Traceability
Every casting batch is verified with spectrometer chemical analyses, mechanical tensile tests, and Charpy impact verifications at sub-zero temperatures. Full EN 10204 3.1 material test certificates accompany all documentation dossiers.
Private Labeling & Custom Casting
For Turkish industrial valve stockists and engineering brands, we offer OEM casting foundry services: pattern customization with native logos, designated RAL epoxy powder coating thicknesses (up to 300 microns for potable water), and bespoke face-to-face machining.
Export Logistics & Custom Clearance
Certified seaworthy multi-ply timber packaging with corrosion-inhibiting VCI foil shields. Direct transit routes from Tianjin Port to major Turkish discharge hubs with full A.TR movement certificate support and seamless Customs Union compliance.
Frequently Asked Questions for Turkish Engineering Projects
Clear, technical explanations regarding standards, actuation interfaces, and localization requirements.
How do ZFA Double Eccentric Valves conform to Turkish TSE Standards?
Our valves are manufactured in accordance with EN 593 and TS EN 1074-1/-2. Flange drillings precisely align with TS ISO 7005-2 (PN10/PN16/PN25/PN40). Hydrostatic pressure tests are 100% executed in compliance with EN 12266-1 Rate A (zero allowable leakage).
Can you provide factory-mounted Turkish or European Actuators?
Yes. Our top flanges comply strictly with ISO 5211 dimensions. We assemble and test factory-calibrated manual worm gears with handwheels, IP68 electric multi-turn actuators (Auma, Rotork, or localized brands), and pneumatic quarter-turn actuators prior to dispatch.
What seat elastomers are recommended for raw vs. treated water lines?
For municipal drinking water, we supply WRAS/KTW-grade EPDM seats resistant to chlorine up to standard concentrations. For raw water with hydrocarbon traces or mineral grease, vulcanized or retained NBR seals are recommended for optimal wear balance.
What is the standard lead time for project volumes shipped to Turkey?
Standard ductile iron sizes (DN100–DN600) carry an OEM manufacturing cycle of 20–30 days. Ocean freight from Tianjin to Mersin, Istanbul, or Gebze port ranges from 24 to 28 days. Express dispatch is available for urgent replacements.
Complete High-Performance Double Offset & Project-Specific Valve Catalog
Direct from our precision manufacturing facility. Certified for international water authorities, refining, chemical processing, and civil distribution networks.
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Polished Stainless Steel Wafer High Performance Valve for Chemical ServiceExplore Specs -
CF8 Double Flange High Performance Butterfly Valve DN1000 PN16 for Transmission LinesExplore Specs -
OEM Flange Connection Double Eccentric Butterfly Valve (TS EN 1074-2 Certified)Explore Specs -
CF8 Wafer High Performance Butterfly Valve with Support Bracket for Heavy Plant LoopsExplore Specs -
Lever-Operated Wafer High Performance Butterfly Valve for Compact HVAC SystemsExplore Specs -
Extension Stem Wafer Butterfly Valve for Buried Chamber Pipelines & Pit InstallationExplore Specs -
PTFE Full-Lined Wafer Butterfly Valve for Severe Acids and Corrosive Chemical MediaExplore Specs -
Ductile Iron PN10/16 Class 150 Soft Sealing Resilient Gate Valve for Potable MainlinesExplore Specs
