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Home > Industrial Equipment & Components > Valve > Check Valve > Factory Direct Marine Slow Closing Check Valve, With 2-Year Warranty, LR ABS Certified, Flanged Connection, Customizable DN/PN
Factory Direct Marine Slow Closing Check Valve, With 2-Year Warranty, LR ABS Certified, Flanged Connection, Customizable DN/PN
Product Spotlights
Factory direct marine slow closing check valve with LR ABS certification, 2-year warranty, and customizable DN/PN. Eliminates water hammer, flanged for easy installation, and made from durable materials to withstand harsh marine environments. Cost-effective solution backed by ISO9001 quality and global shipping from Shanghai ports.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Material:
Other, Ductile Iron / Cast Iron / Stainless Steel (customizable)
Application:
Other, Marine
size_range:
DN50 - DN600 (customizable DN)
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Material
Other, Ductile Iron / Cast Iron / Stainless Steel (customizable)
Application
Other, Marine
size_range
DN50 - DN600 (customizable DN)
pressure_rating
PN10 / PN16 / PN25 / PN40 (customizable PN)
connection_type
Flanged (RF / FF)
color
Blue / Red / Gray (optional)
certification
ISO9001, LR ABS Type Approval
warranty
2 Years
operation_type
Slow closing (non-slam)
sealing_type
Metal-to-Metal or Soft Seal (optional)
Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our Factory Direct Marine Slow Closing Check Valve, a high-performance solution engineered for demanding marine and industrial applications. As an ISO9001-certified manufacturer established in 2016, we combine over 8 years of valve fabrication expertise with rigorous quality control to deliver check valves that prevent water hammer, ensure system safety, and extend equipment life. This valve features a flanged connection, customizable DN/PN ratings, and is LR ABS certified – meeting the strictest global marine standards. Backed by a 2-year warranty and our direct factory pricing, it offers unmatched value for shipbuilders, offshore platforms, and water treatment facilities worldwide.
Key Features & Technical Advantages
- Slow Closing Mechanism: The valve’s internal hydraulic damper or counterweight system ensures a gradual closing action, effectively eliminating pressure surges and protecting pipes from water hammer damage.
- Flanged Connection (RF/FF): Designed to ANSI, DIN, or JIS standards, the flanges provide reliable, leak-proof sealing and easy installation or maintenance.
- Customizable DN/PN: Available from DN50 to DN600 and pressure ratings from PN10 to PN40, with custom sizes and classes available upon request to match your system specifications.
- LR ABS Type Approval: Full certification from Lloyd's Register and American Bureau of Shipping ensures compliance with the highest marine safety and quality requirements.
- Durable Materials: Body and disc made from ductile iron, cast iron, or stainless steel (optional), with a corrosion-resistant coating suitable for seawater and harsh environments.
- Low Maintenance: Simple design with few moving parts reduces wear, and the inspection cover allows easy access for cleaning or part replacement.
Technical Specifications
| Parameter | Value (Standard) | Options |
| Nominal Diameter (DN) | DN50 – DN600 | Custom DN up to DN1200 |
| Pressure Rating (PN) | PN10 / PN16 / PN25 | PN40, Class150, Class300 |
| Flange Standard | DIN 2501 / ANSI B16.5 | JIS, GB, ISO |
| Body Material | Ductile Iron (QT400-18) | CF8M, WCB, Bronze |
| Seat Seal | Metal-to-Metal | PTFE, NBR, EPDM |
| Operating Temperature | -20°C to +120°C | Up to 200°C (with special seals) |
| Certification | ISO9001, LR ABS | Other class (DNV, BV) available |
| Warranty | 2 Years | Extended warranty upon request |
Customer Benefits
- Eliminates Water Hammer: The slow closing feature reduces pipe stress by up to 80%, preventing costly repairs and downtime.
- Marine-Grade Reliability: LR ABS certification ensures the valve can withstand the high pressure and corrosive conditions typical in shipboard and offshore systems.
- Cost Savings: Direct factory pricing and a 2-year warranty lower your total cost of ownership. Customizable DN/PN means you don’t pay for unnecessary oversizing.
- Global Compatibility: Flanged connection options match international pipe standards, simplifying integration into existing systems worldwide.
Why Choose Shanghai Zhibang Valve?
Since 2016, our factory in Shanghai has exported over US$1 million to US$1.5 million annually to markets across North America, South America, Europe, Asia, Africa, and Oceania. We serve shipyards, petrochemical plants, water treatment projects, and industrial OEMs. Our ISO9001 quality management system combined with LR ABS Type Approval guarantees that every Marine Slow Closing Check Valve is factory-tested for zero leakage and smooth operation. With flexible shipping from Shanghai, Guangzhou, Hong Kong, or Beijing ports, we ensure timely delivery to your project site. Contact our technical team today for a customized valve solution — we offer free sizing recommendations and competitive quotes for bulk orders.
Frequently Asked Questions (FAQs)
-
Q: What is the difference between a standard check valve and a slow closing check valve?
A: A standard check valve closes quickly when flow reverses, causing water hammer. A slow closing check valve uses a hydraulic or spring damper to close gradually, preventing pressure surges and protecting the piping system. -
Q: Can I get the valve with other certifications like DNV or BV?
A: Yes, we offer valves certified to DNV, BV, CCS, and other classification societies upon request. The LR ABS certification is included as standard for this marine model. -
Q: What materials are suitable for seawater applications?
A: We recommend ductile iron with epoxy coating or stainless steel (CF8M) for corrosion resistance in seawater. Bronze disc options are also available. -
Q: How do I determine the correct DN/PN for my system?
A: Provide your pipe diameter, operating pressure, temperature, and media type. Our engineers will recommend the optimal size and pressure rating – customization is free for bulk orders. -
Q: Is the valve maintenance-free?
A: The slow closing mechanism is designed for low maintenance, but we recommend an annual inspection of the damper and sealing surfaces. The valve includes an access cover for easy servicing. -
Q: What is the lead time for production?
A: Standard sizes (DN50-DN300) typically ship within 15-25 working days. Custom DN/PN or special material orders may require 25-35 working days. We also offer express delivery for urgent projects. -
Q: Do you provide installation instructions or technical support?
A: Yes, each valve comes with an installation and maintenance manual. Our after-sales team is available 24/7 for remote support, and we can arrange on-site training for large orders. -
Q: Can the valve be installed vertically or horizontally?
A: This model is designed for horizontal installation with the disc opening upward. For vertical lines, please consult our engineering team for a modified version.
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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