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Help CenterMarine Rubber Lined Butterfly Valve With 12-Month Warranty and Mill Test Report
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As a leading ISO9001-certified manufacturer established in 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing high-performance fluid control solutions for demanding global markets. Our Marine Rubber Lined Butterfly Valve is engineered to meet the rigorous challenges of marine and offshore applications, where corrosion resistance and reliable sealing are paramount. We combine robust carbon steel construction with premium elastomer linings to deliver a valve that ensures long service life and minimal maintenance, backed by our comprehensive 12-month warranty and detailed Mill Test Report for full traceability and quality assurance.
This valve is designed to handle a wide range of corrosive and abrasive media in seawater cooling systems, ballast water treatment, firefighting lines, and chemical transfer operations onboard vessels and offshore platforms. Its core value lies in providing a cost-effective and durable sealing solution that outperforms unlined or poorly protected valves in harsh saline and chemical environments.
Key Features & Technical Advantages:
- Superior Corrosion & Abrasion Resistance: The full-bore rubber lining (EPDM, NBR, FKM, or PTFE) completely isolates the valve body from the fluid, protecting against galvanic corrosion, pitting, and erosion caused by seawater, slurries, and chemicals.
- Bubble-Tight Shut-off: The resilient rubber seat provides excellent sealing performance, ensuring zero leakage for critical applications and enhancing system safety and efficiency.
- Low Torque Operation & Easy Maintenance: The smooth lining surface reduces friction, allowing for easier operation with lever, gear, or actuator. The wafer or lug design simplifies installation and space-saving integration into existing pipelines.
- Versatile Configuration: Available in a comprehensive range of sizes, pressure ratings, and actuation methods to fit specific project requirements.
Detailed Technical Specifications:
| Parameter | Specification |
| Body Material | Carbon Steel (WCB), Ductile Iron, Stainless Steel (optional) |
| Lining Material | EPDM (Standard for seawater), NBR, FKM (Viton), PTFE (Teflon) |
| Size Range (DN) | 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600 |
| Pressure Rating | PN10, PN16, ANSI 150, ANSI 300 |
| Temperature Range | -20°C to +120°C (varies with lining material) |
| Connection | Wafer, Lug, Double Flange |
| Operation | Lever Handle, Worm Gear, Electric Actuator, Pneumatic Actuator |
| Face-to-Face | Complies with ISO 5752, API 609 standards |
Benefits for Your Operations:
- Extended Service Life: The protective lining drastically reduces corrosion and wear on the metal body, leading to fewer replacements and lower lifetime costs.
- Enhanced System Reliability: Reliable sealing minimizes fluid loss and prevents contamination, ensuring operational continuity and safety in marine environments.
- Reduced Maintenance Costs: The robust design and corrosion-resistant properties result in less frequent maintenance intervals and lower spare part consumption.
- Global Compliance & Traceability: Supplied with a Mill Test Report (MTR) for material chemical and mechanical properties, supporting quality audits and project documentation requirements.
Trust & Quality Backing:
Shanghai Zhibang Valve's commitment to quality is evidenced by our ISO9001 certification and a proven track record of exporting to diverse and demanding regions including North America, Europe, Southeast Asia, and the Middle East. With an annual export value ranging between US$1 Million to US$1.5 Million, we have built trust with partners worldwide by consistently delivering valves that meet international standards. Our products are shipped from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring efficient logistics. The included 12-month warranty and full material documentation provide you with peace of mind and a clear assurance of product integrity. Choose our Marine Rubber Lined Butterfly Valve for a reliable, durable, and cost-effective solution that stands up to the toughest marine conditions.
Frequently Asked Questions (FAQ):
Q1: What is the main advantage of a rubber-lined butterfly valve over a standard one for marine use?
A: The primary advantage is superior corrosion resistance. The rubber lining acts as a barrier, completely isolating the metal valve body from corrosive seawater or chemicals. This significantly extends valve life and prevents failure due to body corrosion, which is a common issue with unlined valves in marine settings.
Q2: Which rubber lining material is most suitable for seawater applications?
A: EPDM (Ethylene Propylene Diene Monomer) is the standard and recommended lining for seawater, ballast water, and freshwater services due to its excellent resistance to water, ozone, and weathering. For specific chemicals or higher temperatures, NBR, FKM (Viton), or PTFE linings can be selected.
Q3: What does the 12-month warranty cover?
A: Our warranty covers defects in materials and workmanship under normal use and service conditions for a period of 12 months from the date of shipment. It includes the repair or replacement of faulty components, excluding damage caused by improper installation, misuse, or operation outside specified parameters.
Q4: What information is included in the Mill Test Report (MTR)?
A: The MTR provides traceable certification for the metallic materials used in the valve body and disc (like carbon steel). It typically includes the heat number, chemical composition analysis, mechanical property test results (tensile strength, yield strength), and compliance statements with relevant standards (e.g., ASTM).
Q5: Can these valves be fitted with actuators for remote operation?
A: Yes, absolutely. Our valves are designed to be compatible with a range of actuation systems. We can supply valves with electric or pneumatic actuators, complete with mounting kits, limit switches, and positioners as required for automated control systems.
Q6: What are the available pressure classes and connection types?
A: We offer standard pressure ratings of PN10/PN16 (metric) and ANSI 150/300 (imperial). Connection types include wafer style (for between-flange installation), lug style (for end-of-line or dead-end service), and double flanged ends. Specific dimensions comply with international standards like ISO or API.
Q7: How do I select the correct valve size?
A: Valve size (DN or inches) should match your pipeline's nominal diameter. Please provide the pipeline size, desired pressure rating, fluid type, temperature, and flow requirements. Our technical team can assist in selecting the optimal size and configuration for your application.
Q8: What is the typical lead time for orders?
A: Lead time depends on the order quantity, valve size, and configuration. Standard models are often available from stock or have shorter production cycles. For large or customized orders, we provide a firm delivery schedule upon quotation. Our multiple shipment ports enable flexible and timely delivery.
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