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Help CenterCS Approved CB/T3591-2005 Ductile Iron Cargo Oil Gate Valve GB569 GB2501 Flange
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Shanghai Zhibang Valve Manufacture Co., Ltd., a professional manufacturer established in 2016 with ISO9001 certification, is proud to present our CS Approved CB/T3591-2005 Ductile Iron Cargo Oil Gate Valve with GB569 and GB2501 flanges. This valve is specifically designed to meet the rigorous demands of marine cargo oil handling systems, ensuring reliable shut-off and flow control under harsh operating conditions. Our factory leverages years of expertise in valve manufacturing and exports to over 20 countries worldwide, with annual export values reaching US$1.5 million. We are committed to delivering high-quality products that enhance the safety and efficiency of vessel operations.
The Ductile Iron Cargo Oil Gate Valve is engineered to comply with the Chinese standard CB/T3591-2005, offering a robust solution for oil tankers, storage terminals, and offshore platforms. Its flanged connections (GB569 and GB2501) ensure easy installation and maintenance compatibility with existing piping systems. The valve features a compact design, corrosion-resistant materials, and a proven sealing mechanism that minimizes leakage risks. Below, we detail the key specifications and advantages that make this valve a preferred choice for marine engineers.
Technical Specifications
| Parameter | Details |
|---|---|
| Body Material | Ductile Iron (QT400-18, QT450-10, etc.) |
| Disc Material | Ductile Iron or Stainless Steel (optional) |
| Stem Material | Stainless Steel (2Cr13, 304, 316) |
| Seat Ring | Stainless Steel / Ductile Iron with hard facing |
| Packing | Graphite / PTFE (oil-resistant) |
| Flange Standard | GB569, GB2501 (also available: JIS, DIN, ANSI on request) |
| Pressure Test | Hydrostatic: 1.5x rated pressure; Shell test: 1.1x |
| Working Medium | Crude oil, heavy fuel oil, diesel, and other petroleum products |
| Operating Temperature | -20°C to 150°C (depending on packing and materials) |
| Applicable Standards | CB/T3591-2005, ISO9001, GB/T 12234 |
Key Features & Benefits
- High-Quality Ductile Iron Casting: The valve body is made of high-strength ductile iron, offering excellent tensile strength and impact resistance compared to gray iron. This ensures long service life even under repeated thermal cycling and mechanical stress.
- Full-Bore Design: The gate valve provides a straight-through flow path, minimizing pressure drop and allowing pigging or cleaning operations without obstruction.
- Reliable Sealing: The valve employs a wedge-shaped gate with metal-to-metal or soft seal options. The seat ring is hard-faced with stainless steel, resisting erosion from abrasive particles in crude oil.
- Corrosion Resistance: All internal parts, including stem and seat, are available in stainless steel grades suitable for sour service. The exterior is coated with anti-corrosion paint (epoxy or polyurethane) to withstand marine environments.
- Easy Operation: The valve is equipped with a handwheel and rising stem, clearly indicating valve position. Optional gearbox or actuator can be mounted for remote operation.
- Flange Compatibility: Designed to GB569 and GB2501 flanges, which are widely used in Chinese shipbuilding. We also offer flanges per JIS, DIN, or ANSI standards upon request, ensuring global compatibility.
- Stringent Testing: Every valve undergoes hydrostatic shell test, seat leakage test, and visual inspection before shipment. Our ISO9001 quality management system ensures consistent product quality.
This cargo oil gate valve is ideal for applications requiring frequent operation and tight shut-off, such as manifold systems, pipeline isolation, and tank filling/discharge. Its ductile iron construction provides a cost-effective alternative to cast steel without sacrificing performance. Additionally, the valve can be customized with extended stem, locking device, or position indicator to meet specific customer requirements.
Why Choose Shanghai Zhibang Valve?
As a manufacturer with ISO9001 certification and a dedicated export team, we have served clients in North America, South America, Europe, Southeast Asia, Africa, and the Middle East since 2016. Our annual export value of US$1 million to US$1.5 million reflects the trust of international buyers. We offer competitive pricing, flexible shipping from Shanghai, Guangzhou, Hong Kong, or Beijing ports, and comprehensive after-sales support. Each valve is backed by our warranty and technical guidance. Whether you need a standard model or a custom solution, we are ready to collaborate.
Don't compromise on quality for your marine cargo oil system. Contact us today to request a quote or technical drawing. Our team will provide you with the best solution tailored to your vessel's specifications.
Frequently Asked Questions (FAQ)
-
Q: What is the pressure rating of this valve?
A: The pressure rating depends on the flange standard and material grade. Typically, GB569 and GB2501 flanges are available for PN10, PN16, or PN25. Please specify your required pressure class, and we will confirm the design accordingly. -
Q: Can this valve be used for seawater or ballast systems?
A: This valve is primarily designed for cargo oil. For seawater applications, we recommend using a different trim material (e.g., bronze or nickel-aluminum bronze) to avoid galvanic corrosion. Contact us for specialized options. -
Q: What is the difference between GB569 and GB2501 flanges?
A: GB569 is for welding-neck flanges, while GB2501 is for slip-on flanges. Both are commonly used in Chinese marine piping. We can also supply flanges per other standards on request. -
Q: Do you provide certificates of material and test report?
A: Yes, we provide material certificates (MTC) and hydrostatic test reports with each shipment. Third-party inspection (e.g., CCS, DNV, BV) is available upon request at an additional cost. -
Q: What is the lead time for a standard order?
A: For standard sizes (DN50-DN300), lead time is 15-25 working days. Custom sizes or special materials may require 30-45 working days. We can expedite for urgent orders. -
Q: How do I install and maintain this gate valve?
A: Installation should follow the manufacturer's instructions: ensure proper alignment, support the piping, and avoid over-torquing the handwheel. Regularly lubricate the stem and check packing for leaks. We provide a detailed maintenance manual with each order. -
Q: Is this valve suitable for low-temperature applications?
A: The standard design covers -20°C to 150°C. For lower temperatures (down to -46°C), we recommend using low-temperature ductile iron or steel with appropriate impact testing. Please inquire for special requirements. -
Q: Can I get a sample valve before placing a bulk order?
A: Yes, we accept sample orders for evaluation. The sample cost will be deducted from the bulk order quantity. Please contact our sales team for details.
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