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Help CenterDuctile Iron S300x Slow Closing Check Valve, Flanged End, Pressure Rating PN10/16
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Shanghai Sote Valve Co., Ltd., a professional valve manufacturer based in Shanghai, China, proudly presents the Ductile Iron S300x Slow Closing Check Valve. Engineered for reliability in demanding fluid control applications, this valve effectively prevents reverse flow while eliminating water hammer through its innovative slow-closing mechanism. Ideal for water distribution networks and industrial systems, it ensures operational safety and extends pipeline service life.
Our flanged-end check valve combines robust construction with precision engineering to deliver consistent performance under PN10/16 pressure conditions. The resilient seat design guarantees bubble-tight sealing even after prolonged use, significantly reducing maintenance requirements. With its non-slam closure feature, the valve protects your infrastructure from pressure surges that could cause costly damage to pumps and fittings.
Key Technical Specifications:
| Model | S300x | Size Range | DN80-DN1200 (customizable) |
| Body Material | Ductile Iron GGG40 | Disc Material | Ductile Iron + NBR |
| Max Working Temp | 80°C | Face-to-Face | EN 558 Series 20 |
Performance Advantages:
Hydraulic damping system ensures smooth, shock-free closure within 3-20 seconds (adjustable based on system pressure)
Full-bore design minimizes pressure loss (Cv value ≥ 25% higher than standard check valves)
Double eccentric disc structure reduces wear and operating torque by 30% compared to conventional designs
Epoxy-coated interior and exterior surfaces provide superior corrosion resistance (coating thickness ≥ 250μm)
This valve is particularly suitable for:
Pump discharge lines in water treatment plants
HVAC systems requiring silent operation
Fire protection networks where surge prevention is critical
Industrial cooling circuits with frequent flow reversals
Shanghai Sote Valve leverages advanced CNC machining centers and automated foundry processes to maintain dimensional accuracy within ±0.5mm tolerance. Each valve undergoes rigorous hydrostatic testing at 1.5x PN rating for 30 minutes and air-seat testing per EN 12266 standards. Our production facility maintains strict quality control protocols, with batch traceability ensured through laser-etched identification.
With over 15 years of specialization in fluid control solutions, we provide technical support for system integration and customized modifications. Our global clientele includes municipal water authorities and industrial plants across 30+ countries. Contact our Shanghai headquarters today for project-specific quotations, installation guidance, or performance data sheets – our engineering team responds to inquiries within 24 business hours.
Frequently Asked Questions:
Q1: Can this valve be installed vertically?
A: Yes, the S300x series supports both horizontal and vertical installation orientations without performance compromise.
Q2: What maintenance intervals are recommended?
A: Under normal operating conditions, inspection every 5 years is sufficient due to the wear-resistant seat design.
Q3: Is the flange drilling pattern compliant with international standards?
A: Flanges conform to EN 1092-2 PN16 specifications, compatible with DIN and ISO mounting systems.
Q4: Can the closing speed be adjusted onsite?
A: Closing time is factory-preset based on project parameters; field adjustment requires optional hydraulic accessories.
Q5: What media is this valve suitable for?
A: Designed for water, sewage, and neutral liquids (pH 6-9). Material upgrades available for chemical applications.
Q6: Do you provide installation gaskets and bolts?
A: Installation kits with EPDM gaskets and ASTM A193 B7 bolts are available upon request.
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