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Help CenterCB/T3594-94 Marine Float Air Cap, Cast Iron/Bronze Body, DN50-DN200, Flanged, 1 Year Warranty, Standard Compliant
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Shanghai Zhibang Valve Manufacture Co., Ltd is proud to present the CB/T3594-94 Marine Float Air Cap, a high-performance component designed for critical shipboard systems. As a manufacturer established in 2016 with an annual export value of US$1 million to US$1.5 million, we deliver products that meet rigorous marine standards. This air cap is built with your choice of cast iron or bronze body, features flanged connections from DN50 to DN200, and is fully compliant with the CB/T3594-94 standard. It offers reliable air release and float control, ensuring safe operation in ballast tanks, fuel oil tanks, and other marine applications. With a 1-year warranty and ISO9001 certification, you can trust in its durability and performance.
Key Features and Technical Specifications
Our float air cap is engineered for long service life in harsh marine environments. The body is available in two robust materials: cast iron for general seawater and freshwater applications, or bronze for superior corrosion resistance in aggressive media. The flanged design simplifies installation and provides a secure, leak-proof connection. The internal float mechanism automatically vents air and closes when liquid rises, preventing overflow and ensuring system integrity.
| Parameter | Specification |
|---|---|
| Nominal Diameter (DN) | DN50, DN65, DN80, DN100, DN125, DN150, DN200 |
| Body Material | Cast Iron (HT200) or Bronze (ZCuSn10Zn2) |
| Connection Standard | Flanged to CB/T3594-94 / JIS / DIN (optional) |
| Working Pressure | 0.1 MPa – 0.6 MPa (customizable) |
| Operating Temperature | -20°C to +80°C (higher upon request) |
| Float Material | Stainless steel 304/316 |
| Warranty | 1 Year |
Detailed Product Advantages
- Standard Compliance: Manufactured strictly according to the CB/T3594-94 marine industry standard, ensuring compatibility with ship design requirements.
- Material Options: Choose between cast iron for cost-effective performance or bronze for maximum corrosion resistance in saltwater environments.
- Flanged Connection: Easy to install and maintain, with flanges available in multiple drilling patterns (PN10/PN16) to match your piping system.
- Reliable Float Mechanism: The internal float and lever system provides automatic air release and prevents liquid backflow, improving system safety.
- Versatile Applications: Ideal for ballast tanks, fuel oil tanks, lube oil tanks, and freshwater tanks on ships, offshore platforms, and marine vessels.
- Durable Construction: All components are treated for corrosion resistance, with stainless steel fasteners and float.
- Customizable: Available in non-standard sizes, special flange drilling, or alternative materials upon request.
Customer Benefits
- Reduced Maintenance: The robust design minimizes wear and tear, lowering downtime and service costs.
- Enhanced Safety: Automatic air release prevents pressure buildup and tank overfilling, protecting personnel and equipment.
- Global Compatibility: Flanges conform to international standards, simplifying integration with existing systems.
- Cost-Effective: Competitive pricing without compromising quality, backed by a 1-year warranty.
Trust and Reliability
Shanghai Zhibang Valve Manufacture Co., Ltd has been a trusted manufacturer since 2016, exporting to markets across North America, South America, Europe, Asia, Africa, and Oceania. Our annual export value of US$1 million to US$1.5 million reflects the confidence our global customers place in our products. We hold ISO9001 certification for quality management, ensuring consistent production standards. Each CB/T3594-94 Marine Float Air Cap is thoroughly tested before shipment and comes with a 1-year warranty for your peace of mind. Contact us today to discuss your specific requirements or request a quotation – we are ready to support your marine projects with reliable, standard-compliant components.
Frequently Asked Questions (FAQ)
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Q: What is the difference between cast iron and bronze body for this air cap?
A: Cast iron is suitable for general marine applications (freshwater, seawater with moderate corrosion) and is more economical. Bronze offers superior corrosion resistance, especially in aggressive saltwater or acidic environments, making it ideal for long-term exposure. Both materials are available and can be selected based on your tank's medium and budget. -
Q: Can this air cap be used for fuel oil tanks?
A: Yes, the CB/T3594-94 Marine Float Air Cap is designed for marine tanks including fuel oil, lube oil, ballast, and freshwater. However, we recommend using the bronze body for fuel oil applications to avoid potential corrosion from sulfur compounds. Please confirm with our sales team for specific media compatibility. -
Q: What flange standards are available?
A: Standard flanges are drilled according to CB/T3594-94 (Chinese marine standard). Optional flanges to JIS, DIN, or ANSI are available upon request. Please specify your required flange drilling when ordering. -
Q: Is the float material stainless steel?
A: Yes, the float and internal moving parts are made of stainless steel (304 or 316) to ensure corrosion resistance and reliable operation. The float is sealed to prevent liquid ingress. -
Q: What is the warranty period and what does it cover?
A: We offer a 1-year warranty against manufacturing defects. The warranty covers replacement of the product or parts free of charge, provided the defect is not caused by improper installation, misuse, or unauthorized modification. Please contact our after-sales team for detailed terms. -
Q: Can you provide custom sizes or special material combinations?
A: Absolutely. We can manufacture non-standard sizes (e.g., DN250, DN300) or alternative materials (e.g., ductile iron, naval brass) with a minimum order quantity. Custom flange drilling, pressure ratings, and temperature ranges are also available. Contact our technical department for a feasibility assessment. -
Q: How do I install the float air cap correctly?
A: The air cap should be installed on the top of the tank with the flanged connection facing down. Ensure the flange gasket is properly seated and bolts are tightened evenly. The float mechanism must be oriented vertically to allow free movement. Refer to the installation manual included with the product. For further assistance, our engineers can provide guidance. -
Q: Do you have stock for DN50, DN100, or DN200?
A: We maintain inventory for the most common sizes (DN50, DN80, DN100, DN150, DN200) in cast iron. For bronze variants or less common sizes, please inquire about lead time. Typically, standard sizes are shipped within 7-15 days after order confirmation.
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