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Marine Slow Closing Butterfly Check Valve With Mill Test Report and Warranty
Product Spotlights
Specifically engineered for marine applications, this valve features a critical slow-closing mechanism to prevent damaging water hammer, protecting shipboard piping systems. Constructed with corrosion-resistant materials like SS316, it ensures reliability in harsh seawater environments. Supplied with a Mill Test Report for full material traceability and backed by a warranty, it offers enhanced safety, reduced maintenance costs, and long-term operational integrity for ballast, cooling, and fire-fighting lines.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Application:
Other, Marine and Shipboard Piping Systems
Type:
Slow Closing Butterfly Check Valve
Material:
Body: Ductile Iron/Cast Steel/Bronze, Disc: SS316
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Application
Other, Marine and Shipboard Piping Systems
Type
Slow Closing Butterfly Check Valve
Material
Body: Ductile Iron/Cast Steel/Bronze, Disc: SS316
Size Range
DN50 to DN600 (2“ to 24“)
Connection Type
Wafer, Lug, Flanged
Pressure Rating
PN10/16, Class 150/300
Seat Material
EPDM, NBR, Viton
Actuation
Manual Gear, Pneumatic, Hydraulic
Certification
ISO9001 Quality Management System
Documentation
Mill Test Report, Warranty Certificate
As a leading valve manufacturer established in 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing robust and reliable fluid control solutions for the demanding marine industry. Our Marine Slow Closing Butterfly Check Valve is engineered to deliver superior performance, ensuring safe and efficient operation of shipboard piping systems by preventing reverse flow and mitigating damaging water hammer effects. With an annual export value exceeding US$1 million and a strong presence in global markets from North America to Southeast Asia, we combine rigorous ISO9001-certified manufacturing processes with deep industry expertise to offer valves that meet the highest standards of quality and durability.
This valve is specifically designed for marine applications where reliability is non-negotiable. Its slow-closing mechanism is a critical feature, allowing the disc to close gently and securely after the forward flow stops. This controlled motion prevents sudden pressure surges (water hammer) that can damage pipes, pumps, and other connected equipment, significantly enhancing the system's longevity and safety.
Key Features & Technical Advantages:
- Advanced Slow-Closing Design: Incorporates a hydraulic dashpot or spring mechanism to regulate disc closure speed, effectively absorbing kinetic energy and protecting the pipeline infrastructure.
- Robust Construction for Harsh Environments: Available in various material combinations like ductile iron body with stainless steel (SS316) disc to withstand corrosive seawater, high pressures, and variable temperatures.
- Bubble-Tight Shut-Off: Features a resilient seat (EPDM/NBR/Viton) that ensures a leak-proof seal in both forward and reverse flow conditions, crucial for maintaining system integrity.
- Versatile Actuation Options: Can be operated manually via a gearbox or automated with pneumatic/hydraulic actuators for integration into remote-controlled or automated ship systems.
- Low Pressure Drop: The butterfly disc design offers minimal flow resistance when fully open, optimizing pump efficiency and reducing operational energy costs.
- Easy Installation & Maintenance: The compact wafer or lug design allows for straightforward installation between flanges without requiring additional gaskets in many cases, simplifying upkeep.
Technical Specifications Overview:
| Parameter | Specification |
| Size Range | DN50 to DN600 (2" to 24") |
| Pressure Rating | PN10/16, ANSI Class 150/300 |
| Body Material | Ductile Iron, Cast Steel, Bronze |
| Disc & Stem Material | Stainless Steel 316, Bronze |
| Seat Material | EPDM, NBR, Viton (Customizable) |
| Connection | Wafer, Lug, Double Flanged |
| Temperature Range | -10°C to 120°C (depends on seat material) |
| Slow Closing Time | Adjustable, typically 3-60 seconds |
Benefits for Our Clients:
- Enhanced System Protection: Eliminates water hammer, reducing maintenance costs and unplanned downtime for critical marine systems like ballast, cooling, and fire-fighting lines.
- Improved Operational Safety: Prevents backflow, safeguarding pumps and ensuring the correct direction of fluid movement in essential processes.
- Long-Term Reliability: Constructed from corrosion-resistant materials suitable for marine environments, offering an extended service life and a lower total cost of ownership.
- Documentation & Traceability: Each valve is supplied with a comprehensive Mill Test Report (MTR) detailing material chemical and physical properties, providing full traceability and quality assurance.
- Manufacturer's Warranty: Backed by a standard warranty, demonstrating our confidence in product quality and commitment to customer satisfaction.
Frequently Asked Questions (FAQ):
-
Q: What is the primary purpose of the 'slow closing' feature in this check valve?
A: The slow closing mechanism is designed to prevent water hammer—a pressure surge caused when flow stops abruptly. By closing the disc gradually, it protects pipelines, pumps, and fittings from potential damage, which is vital for the safety and longevity of marine piping systems. -
Q: Can this valve be used with seawater and other corrosive fluids?
A: Yes. We offer material combinations specifically for corrosive media. For seawater applications, we recommend a valve with a stainless steel (SS316) disc and stem, along with an EPDM or Viton seat, ensuring excellent corrosion resistance. -
Q: Is the closing time adjustable?
A: In many of our models, the closing speed is adjustable. The specific adjustment range (e.g., 3 to 60 seconds) depends on the valve size and the actuation mechanism (hydraulic dashpot or spring). Details are available upon request for specific models. -
Q: Do you provide documentation like Mill Test Reports?
A: Absolutely. A Mill Test Report (MTR) is provided as standard with each valve. This document certifies the material grade, chemical composition, and mechanical properties, offering full traceability and quality verification for your project records. -
Q: What types of end connections are available?
A: We offer versatile connections to suit different piping layouts: Wafer style for compact installation between flanges, Lug style for end-of-line service or dead-end support, and Flanged ends with standard drilling patterns. -
Q: What is covered under the warranty?
A: Our standard warranty covers defects in materials and workmanship under normal use for a specified period. The exact warranty terms, including duration and coverage details, are provided in the warranty certificate shipped with the product. -
Q: Can the valve be automated for remote operation?
A: Yes. While it functions as a self-actuating check valve, it can also be equipped with optional pneumatic or hydraulic actuators. This allows for positive closure on command and integration into automated control systems onboard vessels. -
Q: What are your main shipping ports?
A: We ship globally from major Chinese ports including Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring efficient and flexible logistics to meet your project timelines in markets worldwide.
Trust in a product backed by a manufacturer with a proven track record. Shanghai Zhibang's commitment to quality, evidenced by our ISO9001 certification and the provision of Mill Test Reports, ensures that every valve meets stringent performance criteria. Our annual export value of US$1-1.5 million and widespread acceptance across continents from Eastern Europe to Oceania testify to the reliability of our solutions. By choosing our Marine Slow Closing Butterfly Check Valve, you are not just purchasing a component; you are investing in the protection, efficiency, and durability of your marine operations. Contact us today to discuss your specific requirements and receive a detailed quotation.
Send Inquiry to This Supplier
1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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