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Help CenterMarine Butterfly Check Valve With Rubber-Lined Seat for Corrosive Media Handling, ANSI Standard
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As a professional manufacturer with ISO9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing reliable fluid control solutions for demanding industrial applications. Our Marine Butterfly Check Valve with Rubber-Lined Seat is engineered specifically for handling corrosive media in harsh marine environments. This valve combines the efficient flow characteristics of a butterfly valve with the automatic backflow prevention of a check valve, offering a compact and cost-effective solution for shipbuilding, offshore platforms, and coastal processing plants. Built to ANSI standards, it ensures compatibility and performance reliability in global projects.
This valve is designed to address the unique challenges of corrosive fluid handling, where standard valves may fail prematurely. The integrated design reduces installation space and weight compared to traditional check valve setups, which is a critical advantage in marine applications.
Key Features & Technical Advantages:
- Corrosion-Resistant Construction: The rubber-lined seat provides an excellent seal against a wide range of corrosive chemicals, seawater, and abrasive slurries, significantly extending service life.
- ANSI Standard Compliance: Manufactured to ANSI dimensional and pressure rating standards (such as Class 150 and Class 300), ensuring easy integration into existing piping systems and global acceptance.
- Low Pressure Drop & High Flow Capacity: The butterfly disc design offers minimal flow restriction when open, promoting energy efficiency and maximizing system throughput.
- Bidirectional Sealing (Optional): Certain models can be configured for sealing in both flow directions, providing an extra layer of safety in complex piping networks.
- Compact & Lightweight Design: The wafer-style body saves considerable space and weight compared to conventional swing or lift check valves, reducing structural support needs.
- Low Maintenance: Simple design with fewer moving parts translates to reduced maintenance costs and downtime. The rubber seat is also field-replaceable in many models.
- Versatile Material Options: While the seat is rubber-lined, the body and disc materials can be selected from ductile iron, cast steel, or stainless steel to match specific fluid compatibility and strength requirements.
Technical Specifications Overview:
| Parameter | Specification / Option |
| Design Standard | ANSI |
| Pressure Rating | Class 150, Class 300 (Other ratings available upon request) |
| Size Range | 2" to 48" (DN50 to DN1200) |
| Seat Lining Material | EPDM, NBR, Viton (Customizable for fluid compatibility) |
| Body Material | Ductile Iron (Standard), Cast Steel, Stainless Steel (304/316) |
| Disc Material | Stainless Steel with Rubber Coating or Full Stainless Steel |
| Connection Type | Wafer (Standard), Lug (Optional) |
| Temperature Range | Depends on seat material (e.g., EPDM: -20°C to 120°C) |
| End Connection Standards | ANSI Flange Faces (RF, FF) |
Benefits for Your Operations:
- Enhanced System Safety: Prevents reverse flow and potential contamination or damage to pumps and upstream equipment.
- Reduced Lifetime Cost: The durability against corrosion minimizes replacement frequency and associated labor and downtime costs.
- Improved Efficiency: Low pressure drop design helps reduce pumping energy requirements over the long term.
- Global Project Compatibility: ANSI standardization simplifies procurement and installation for international projects, particularly in our main markets across North America, South America, Europe, Asia, Africa, and Oceania.
- Flexible Sourcing: With annual export values between US$1-1.5 million and multiple shipment ports (Shanghai, Guangzhou, Hong Kong, Beijing), we offer reliable and flexible logistics to meet your project timelines.
Shanghai Zhibang Valve Manufacture Co., Ltd. brings nearly a decade of manufacturing expertise since 2016 and a commitment to quality under our ISO9001 system. Our valves are trusted in marine and industrial applications worldwide. The Marine Butterfly Check Valve with Rubber-Lined Seat exemplifies our focus on solving specific challenges like corrosion handling with a robust, standards-compliant product. We invite you to contact us with your specific media, pressure, and size requirements to receive a tailored quotation and technical support. Partner with us for a reliable valve solution that protects your critical systems.
Frequently Asked Questions (FAQ)
Q1: What is the main advantage of a butterfly check valve over a traditional swing check valve?
A: The primary advantages are its compact, lightweight wafer design which saves space and weight, and its lower pressure drop when open, leading to improved flow efficiency. It is particularly beneficial where space and weight are constraints, such as on marine vessels.
Q2: Which corrosive media is the rubber lining suitable for?
A: The standard rubber lining (like EPDM or NBR) is resistant to a wide range of chemicals, including seawater, mild acids, alkalis, and abrasive slurries. The exact compound can be customized (e.g., Viton for hydrocarbons) based on your specific fluid properties.
Q3: Does this valve require any external power or signal to operate?
A: No. It is a self-acting, automatic check valve. The disc opens by forward flow pressure and closes by spring force and/or reverse flow, requiring no external power source.
Q4: Can this valve be used in vertical piping with upward flow?
A: Yes, it is suitable for installation in horizontal or vertical pipelines. For vertical installation, the orientation (flow direction) should be confirmed with our technical team to ensure proper disc closure.
Q5: What is the difference between wafer and lug connection types?
A: A wafer-style valve is sandwiched between two flanges using long bolts. A lug-style valve has threaded inserts (lugs) on the valve body, allowing it to be bolted directly to each flange independently, which can be useful for end-of-line applications or easier maintenance.
Q6: Is the rubber seat replaceable?
A: In most of our standard designs, the rubber-lined seat is field-replaceable. This feature significantly extends the valve's service life and reduces long-term ownership costs.
Q7: Do you provide documentation like test reports and material certificates?
A: As an ISO9001 certified manufacturer, we can provide standard documentation, including material test reports and factory test certificates (e.g., hydrostatic test), upon request.
Q8: What is your typical lead time for an order?
A: Lead time depends on the order quantity, size, and material specifications. Standard sizes and configurations typically have shorter lead times. We can provide a specific timeline upon receipt of your detailed inquiry.
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