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Help CenterMarine-Grade Butterfly Valve With 5-Year Warranty on PTFE Lining Against Chemical Erosion
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Shanghai Zhibang Valve Manufacture Co., Ltd. proudly introduces our Marine-Grade Butterfly Valve with a 5-Year Warranty on PTFE Lining Against Chemical Erosion. Designed specifically for demanding marine and chemical environments, this valve combines robust construction with a high-performance PTFE lining that delivers exceptional resistance to corrosive media. As a manufacturer established in 2016 with annual exports exceeding US$1 million, we ensure every product meets stringent quality standards, backed by our ISO9001 certification. Whether you operate in offshore platforms, shipbuilding, or chemical processing plants, our butterfly valve provides reliable flow control with minimal maintenance.
Our valve’s marine-grade alloy body withstands harsh saltwater atmospheres, while the thick PTFE lining creates an impervious barrier against acids, alkalis, and solvents. With a 5-year warranty specifically covering the PTFE lining against chemical erosion, we offer unmatched peace of mind. Below we detail key technical specifications, advantages, and real benefits for your operations.
Key Features & Technical Specifications
| Feature | Specification / Detail | Benefit to Customer |
|---|---|---|
| Body Material | Marine-grade alloy (e.g., 316SS, Duplex, or Nickel-Aluminum-Bronze) | Exceptional corrosion resistance in seawater and high-humidity environments. |
| PTFE Lining | Thick, dense PTFE (pure or reinforced) – thickness ≥ 3mm | Total barrier against chemical attack; low friction; non-stick surface for easy cleaning. |
| Pressure Rating | PN10 / PN16 (also ANSI 150 / 300 available upon request) | Suitable for medium to high pressure applications; adaptable to global standards. |
| Connection Type | Wafer (between flanges) or Lug (single flange) – customizable | Flexible installation options; reduced maintenance downtime. |
| Operation | Manual lever / gearbox, or pneumatic/electric actuator (optional) | Ease of use in both manual and automated systems; compatible with remote control. |
| Temperature Range | -20°C to +180°C (depending on lining grade) | Suitable for a wide variety of process fluids, including hot chemicals. |
| Valve Size | DN50 to DN300 (more non-standard sizes on request) | Covering most marine and industrial pipeline dimensions. |
| Certifications | ISO9001:2015, CE marked, ABS / DNV optional | International quality assurance; easy acceptance by marine classification societies. |
Product Advantages & Customer Benefits
- 5-Year Warranty on PTFE Lining: Our exclusive warranty covers the PTFE lining against chemical erosion, demonstrating our confidence in the material’s longevity. This reduces your total cost of ownership and risk.
- Superior Chemical Resistance: The PTFE lining withstands nearly all aggressive chemicals, including hydrochloric acid, sulfuric acid, caustic soda, and seawater. No pitting, swelling, or degradation.
- Marine-Grade Construction: High-strength alloys resist galvanic corrosion and biofouling in saltwater environments. Extended service life even on offshore platforms.
- Low Maintenance: The non-stick PTFE surface prevents scale build-up; quarter-turn operation reduces wear. Simplified servicing and fewer spare parts needed.
- Versatile Control: Compatible with pneumatic, electric, or manual actuators. Offers precise flow regulation or shut-off in any orientation.
- Full Traceability: Each valve is serialized and tested with pressure and lining integrity checks. Complete documentation provided.
- Global Logistics: We ship from Shanghai, Guangzhou, Hong Kong, Beijing – ready for export packing and fast delivery to all major markets.
Trust & Reliability
Shanghai Zhibang Valve Manufacture Co., Ltd. has been an ISO9001-certified manufacturer since 2016, with an annual export value of US$1 – US$1.5 million. We serve diverse markets including North America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. Our valves are installed in shipbuilding, desalination plants, chemical terminals, and industrial pipelines worldwide. With experienced engineers and strict quality control, we ensure that every marine-grade butterfly valve meets your requirements. The 5-year warranty on PTFE lining is our commitment to your long-term satisfaction.
Invest in a valve that delivers performance and peace of mind. Contact our team for a quotation or technical consultation. We are ready to support your project from design to commissioning.
Frequently Asked Questions (FAQ)
Q1: What is the exact thickness of the PTFE lining?
A: Our standard PTFE lining thickness ranges from 3mm to 5mm depending on valve size. For larger sizes (DN200+), we apply a minimum of 4mm. This ensures robust chemical protection.
Q2: Can you provide additional certifications like DNV, ABS, or Lloyd’s?
A: Yes. Although our factory holds ISO9001, we can arrange third-party classification society certificates (DNV, ABS, BV, etc.) upon request. There may be additional fees and lead time.
Q3: Does the 5-year warranty cover only the PTFE lining? What about the valve body?
A: The 5-year warranty specifically covers the PTFE lining against chemical erosion (perforation, cracking, or delamination caused by chemical attack). The valve body carries a standard 1-year warranty against manufacturing defects. Both terms are clearly stated in our warranty document.
Q4: How do you test the PTFE lining integrity?
A: Every valve undergoes a 100% spark test (high-voltage holiday detection) on the PTFE lining to verify pinhole-free coverage. We also perform a hydrostatic shell test and seat leakage test per ISO 5208.
Q5: What pressure classes are available?
A: We offer PN10, PN16, ANSI 150, and ANSI 300 as standard options. Custom classes are available after engineering review.
Q6: Is the valve suitable for vacuum service?
A: Yes, our lined butterfly valves can handle vacuum down to -0.1 MPa (1 bar absolute) when properly installed with the correct seat and liner design. Please specify vacuum service in your inquiry.
Q7: What actuator options do you recommend for automated control?
A: We offer pneumatic (double-acting or spring-return) and electric actuators from reputable OEMs. For marine applications, we typically recommend 304SS or epoxy-coated actuators with IP67 protection. Actuator sizing is adjusted based on line pressure and torque requirements.
Q8: What is the typical lead time for a standard size valve?
A: For common sizes (DN50-DN150), lead time is about 15–25 working days after order confirmation. Larger sizes or custom materials may require 30–40 days. We also maintain a small stock for urgent needs.
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