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Help CenterLarge Diameter Butterfly Check Valve for Main Pipeline Systems, DN400, Ductile Iron Body
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As a leading manufacturer with a strong commitment to quality and reliability, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our high-performance Large Diameter Butterfly Check Valve for demanding main pipeline systems. Engineered for critical applications where backflow prevention is non-negotiable, this DN400 valve combines robust ductile iron construction with a streamlined butterfly disc design to ensure minimal pressure drop and reliable, automatic operation. Since our establishment in 2016, we have dedicated ourselves to producing industrial valves that meet the rigorous demands of global markets, from North America to Southeast Asia and beyond. This valve is a testament to our expertise, designed to provide long-term, maintenance-free service in water supply, irrigation, industrial process lines, and other essential infrastructure projects.
The core value of this valve lies in its ability to protect expensive pumps, meters, and other downstream equipment from the damaging effects of reverse flow, all while offering significant advantages over traditional swing check valves. Its compact and lightweight design, especially for large diameters, translates to easier installation and lower structural support requirements. The precision-engineered disc and seat ensure a tight seal and rapid response to flow changes, preventing water hammer and associated pipeline stresses. We understand that main pipeline systems cannot afford downtime, which is why this valve is built for durability and consistent performance under varying pressure conditions.
Key Features & Technical Advantages:
- Robust Ductile Iron Body: Provides superior strength, impact resistance, and corrosion resistance compared to standard cast iron, ensuring longevity in harsh environments.
- Efficient Butterfly Disc Design: The centrally mounted disc offers a straight-through flow path, resulting in a very low head loss coefficient, which saves energy in pumping systems.
- Automatic, Spring-Assisted Closure: The integrated spring mechanism ensures positive and rapid disc closure the instant forward flow stops, effectively preventing backflow and slam.
- Multiple Seat Material Options: Available with EPDM for water and weak chemicals, NBR for oils and fuels, or other elastomers upon request to match your specific media.
- Compact Wafer or Lug Style: The wafer design fits standard pipeline flanges, saving space and weight. Lug-style versions are available for end-of-line service or where the valve needs to be isolated.
- Easy Installation & Maintenance: Its lightweight design simplifies handling. The simple construction allows for easy inspection and potential seat replacement without removing the valve body from the line.
Detailed Technical Specifications:
| Parameter | Specification |
|---|---|
| Nominal Diameter | DN400 (16") |
| Body Material | Ductile Iron (GGG40/50) |
| Disc Material | Ductile Iron with Epoxy Coating |
| Seat Material (Standard) | EPDM |
| Pressure Rating (PN) | PN10 / PN16 (Class 150) - Others available |
| Connection Standard | ISO 5752, EN 1092, ASME B16.1 Flanges |
| Temperature Range (with EPDM) | -10°C to +120°C |
| Flow Direction | Horizontal or Vertical (flow upward) |
Benefits for Your Project:
- System Protection: Safeguards pumps and equipment from reverse flow damage, reducing repair costs and downtime.
- Operational Efficiency: Low flow resistance design minimizes energy consumption for fluid transport.
- Cost-Effective Solution: Lower initial cost and installation expense compared to large swing or dual-plate check valves of similar size.
- Reliability: Simple mechanism with fewer moving parts leads to higher reliability and less frequent maintenance needs.
- Versatility: Suitable for clean water, wastewater, air, and other non-aggressive media in municipal, industrial, and building service applications.
Choosing Shanghai Zhibang means partnering with a certified and experienced supplier. Our operations are backed by an ISO9001 Quality Management System, ensuring every valve, including this DN400 Butterfly Check Valve, meets consistent high standards from raw material inspection to final testing. With an annual export value ranging between US$1 Million to US$1.5 Million, we have successfully delivered reliable valve solutions to diverse markets across North America, South America, Europe, Asia, Africa, and Oceania. We offer flexible shipping from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing to ensure timely delivery to your project site. Trust in our manufacturing expertise for your critical pipeline components. Contact us today to discuss your requirements, request a detailed quotation, or explore customization options for your specific application.
Frequently Asked Questions (FAQ):
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Q: What is the main advantage of a butterfly check valve over a swing check valve for large diameters?
A: The primary advantage is its compact and lightweight design. A DN400 butterfly check valve is significantly lighter and shorter than a comparable swing check valve, making it easier and cheaper to install, requiring less structural support, and resulting in lower pressure drop. -
Q: Can this valve be installed in any orientation?
A: For optimal performance, horizontal installation is recommended. It can also be installed in vertical pipelines, provided the flow direction is upward. Installation in a vertical line with downward flow is not advised as it may hinder proper disc closure. -
Q: What media is the standard EPDM seat suitable for?
A: The standard EPDM (Ethylene Propylene Diene Monomer) seat is excellent for water (potable, cold, hot), weak acids, alkalis, and steam up to 120°C. For oils, fuels, or specific chemicals, alternative seat materials like NBR or Viton can be provided. -
Q: Is this a silent check valve? Does it prevent water hammer?
A: While not completely silent, the spring-assisted closure of the butterfly disc provides a faster and more controlled closing action than a gravity-dependent swing check valve. This rapid closure significantly reduces the potential for severe water hammer and the associated "slam" noise. -
Q: Do you offer different pressure ratings besides PN10/16?
A: Yes. While PN10 and PN16 (approximately Class 150) are standard for this model, we can manufacture valves to other pressure classes such as PN25 or specific customer standards upon request. Please specify your required pressure rating during inquiry. -
Q: What testing is performed on the valves before shipment?
A: Each valve undergoes routine factory tests, which typically include a shell test (body strength) and a seat leakage test to ensure integrity and sealing performance according to relevant standards like ISO 5208. -
Q: Are spare parts like seal rings available?
A: Absolutely. We maintain an inventory of critical spare parts, including seat rings and seals, to support our products throughout their service life. Spare parts kits can be ordered along with the valve. -
Q: What is the lead time for an order of DN400 valves?
A: Lead time depends on order quantity and specific configuration. For standard DN400 valves with EPDM seats, we generally have a competitive production schedule. Please contact our sales team with your required quantity for an accurate delivery timeline.
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