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Help CenterStandard Ductile Iron Stop Check Valve With Technical Data Sheet, GB/T1855
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As a professional valve manufacturer with a solid foundation since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our Standard Ductile Iron Stop Check Valve, engineered to the GB/T1855 standard. This valve is a cornerstone product in our portfolio, designed to deliver reliable flow control and backflow prevention in demanding pipeline systems. We combine robust manufacturing capabilities with stringent quality control under our ISO9001 certification to ensure every valve meets the high expectations of our global clientele across diverse markets from North America to Southeast Asia.
Our Standard Ductile Iron Stop Check Valve is engineered for superior performance and durability. It functions as both a check valve, preventing reverse flow, and a stop valve, allowing manual isolation of the line. The key features and technical specifications that set our product apart include:
- Robust Construction: The valve body is crafted from high-grade ductile iron, offering exceptional strength, impact resistance, and longevity compared to standard cast iron, making it suitable for a wide range of pressures and applications.
- Dual-Function Design: It integrates the non-return function of a check valve with the positive shut-off capability of a stop valve, providing operational flexibility and saving on installation space and costs.
- Reliable Sealing: Depending on the medium and service conditions, the valve seat can be fitted with a resilient rubber seal for tight shut-off in water applications or a metal seat for higher temperature or abrasive services.
- Smooth Operation: The design ensures minimal pressure drop during forward flow and a swift, positive closure to prevent water hammer and protect upstream equipment when flow reverses or stops.
- Standard Compliance: Manufactured in strict accordance with the Chinese national standard GB/T1855, ensuring dimensional interchangeability and performance reliability within standardized piping systems.
Below is a summary of the primary technical specifications:
| Parameter | Specification |
|---|---|
| Body Material | Ductile Iron |
| Disc Material | Ductile Iron |
| Seat Material | Rubber / Metal (Customizable) |
| Connection | Flanged (as per GB standard) |
| Pressure Rating (PN) | PN10, PN16, PN25 (Available) |
| Nominal Diameter (DN) | DN50 - DN600 (Standard range) |
| Temperature Range | -10°C to 120°C (with rubber seat) |
| Applicable Medium | Water, Oil, Gas, Steam (compatible) |
| Standard | GB/T1855 |
| Operation | Manual (handwheel) |
The advantages of choosing our Ductile Iron Stop Check Valve translate directly into benefits for your operations:
- Enhanced System Protection: Prevents reverse flow and water hammer, safeguarding pumps and other critical equipment from damage.
- Operational Efficiency: The combined stop/check function simplifies system design, reduces the number of required fittings, and eases maintenance procedures.
- Cost-Effective Solution: The durability of ductile iron minimizes replacement frequency, while the standardized design ensures easy sourcing of spare parts and reduces lifetime maintenance costs.
- Versatile Application: Suitable for municipal water supply, building services (HVAC), industrial cooling systems, and general pipeline applications where flow control and prevention of backflow are essential.
Shanghai Zhibang Valve's commitment to quality is underscored by our ISO9001 certification and a track record of exporting over $1 million in valves annually to markets worldwide, including North America, Europe, and Southeast Asia. Our established supply chain and multiple shipment ports (Shanghai, Guangzhou, Hong Kong, Beijing) ensure reliable and timely delivery. This valve is not just a component; it's a reliable solution built on years of manufacturing expertise. For pipeline systems demanding durability, compliance, and functional versatility, our Standard Ductile Iron Stop Check Valve is a sound investment. Contact us today to discuss your specific requirements or to request the detailed technical data sheet.
Frequently Asked Questions (FAQ)
Q1: What is the main difference between a standard check valve and this stop check valve?
A: A standard check valve only prevents reverse flow automatically. Our stop check valve adds a manual handwheel, allowing you to mechanically lock the disc in the closed position, providing positive isolation like a gate valve, even if forward pressure is present.
Q2: Is this valve suitable for steam service?
A: With a metal seat configuration, this valve can handle steam applications within its specified temperature and pressure ratings. It is crucial to confirm the exact pressure and temperature parameters with our technical team for safe operation.
Q3: Are the flanges compatible with international standards like ANSI or DIN?
A: This valve is manufactured to the GB/T1855 standard, which has specific flange dimensions. While it may share similarities, compatibility with ANSI or DIN flanges should be verified. We can often supply valves with adaptor flanges or produce to other standards upon request.
Q4: What is the lead time for an order of DN300 valves?
A: Lead times vary based on order quantity and current production schedule. For standard DN300 valves, typical production lead time is 4-6 weeks. We recommend contacting our sales department with your specific quantity for an accurate delivery schedule.
Q5: Can you provide valves with different end connections, like threaded ends?
A: Our standard offering is flanged connections per GB/T1855. However, as a manufacturer, we offer customization. Threaded ends or other connection types can be discussed as a special order.
Q6: Does the valve come with any warranty?
A: Yes, we provide a standard warranty against material and manufacturing defects. The specific warranty period and terms are provided with the commercial contract and can vary based on the application.
Q7: What maintenance does this valve require?
A: The valve is designed for low maintenance. Periodic external inspection for leaks and occasional exercise of the handwheel to prevent seizing are recommended. The internal components, like the seat, are accessible for replacement if needed, extending the valve's service life significantly.
Q8: Do you offer actuation options for this valve?
A: The standard valve is manual. However, we can collaborate to provide electric, pneumatic, or hydraulic actuators for remote or automated operation. This would be a customized solution.
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