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Help CenterS505X Pressure Sustaining/Reducing Valve, Cast Iron Body, DN50-DN300, Water Supply Systems
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Shanghai Sote Valve Co., Ltd., a specialized valve manufacturer based in Shanghai, China, presents the S505X series pressure management solution. Engineered for precise pressure control in demanding water supply networks, this dual-function valve maintains downstream pressure stability while preventing upstream overpressure conditions. With DN50-DN300 sizing flexibility and robust cast iron construction, it delivers reliable performance in municipal water distribution, industrial plants, and high-rise building systems.
Core Technical Advantages:
- Dual-Function Design - Combines pressure reducing and sustaining operations in a single valve body, simplifying system architecture
- Precision Control Mechanism - Pilot-operated diaphragm system ensures ±5% pressure regulation accuracy under flow variations
- Zero-Leakage Assurance - Precision-machined stainless steel trim with NBR seals achieves bubble-tight shutoff (Class VI)
- Low-Maintenance Construction - Non-corrosive diaphragm chamber and accessible strainer extend service intervals
Performance Specifications:
| Parameter | Specification |
| Body Material | GG25 Cast Iron (EN-JL1040) |
| Pressure Class | PN10/PN16 (ANSI 125/150 optional) |
| Flow Coefficient (Cv) | DN50: 75 | DN100: 280 | DN200: 1100 |
| Max Inlet Pressure | 25 bar (PN25 version available) |
| Adjustment Range | 1.5 - 10 bar (wider ranges customizable) |
Operational Benefits for Water Systems:
- Eliminates pressure surges that damage pipelines and fittings
- Reduces pumping energy consumption by 12-18% through optimized pressure zones
- Prevents water hammer via integrated soft-closing feature
- Enables zoning in high-rise buildings with consistent floor-to-floor pressure
Installation & Maintenance Features:
- Bi-directional flow design allows flexible pipeline integration
- Test ports on pilot system facilitate in-situ diagnostics
- Stainless steel screen (100 micron) protects control components
- Diaphragm replacement possible without valve removal
Backed by Shanghai Sote Valve's 15-year expertise in fluid control solutions, the S505X series undergoes rigorous production testing including hydrostatic body tests at 1.5x PN rating and functional verification under simulated load conditions. Our Shanghai-based manufacturing facility maintains strict process controls, ensuring consistent performance across all valve sizes. For critical water infrastructure projects throughout Asia and beyond, this valve delivers proven reliability with local technical support.
Frequently Asked Questions:
Q1: Can this valve handle chlorinated water?
A: Yes, standard NBR seals are suitable for potable water with chlorine levels below 2 ppm. EPDM seals are available for higher concentrations.
Q2: Is flange drilling compatible with international standards?
A: Standard valves feature ISO 7005-2 PN16 flange patterns. ASME B16.5 drilling can be provided upon request.
Q3: What maintenance intervals are recommended?
A: Annual inspection of pilot system filters and diaphragm integrity is advised. Strainer cleaning frequency depends on water quality.
Q4: Can the valve operate without external power?
A: Yes, it utilizes line pressure for operation - no electrical connections required.
Q5: What is the delivery lead time for DN200 valves?
A: Standard DN200 units ship within 4 weeks. Contact our Shanghai office for expedited options.
Q6: Are installation orientation restrictions?
A: Mount with actuator vertically upward. Pipeline must be flushed before commissioning.
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