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Help CenterWafer Type Marine Check Valve for Oil, Compliant With CB/T4303 Standard, DN300 Size
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As a dedicated manufacturer of industrial valves, Shanghai Zhibang Valve Manufacture Co., Ltd. leverages its expertise and commitment to quality to bring you this reliable Wafer Type Marine Check Valve. Designed specifically for demanding oil and marine applications, this valve ensures unidirectional flow control, preventing potentially damaging backflow in critical piping systems. Engineered to meet the rigorous CB/T4303 standard and offered in a DN300 size, it represents a robust and space-saving solution for shipbuilders, offshore platform operators, and marine engineering contractors seeking dependable performance and long service life.
Our Wafer Type Marine Check Valve is engineered to deliver exceptional performance in challenging environments. Its compact wafer design allows for easy installation between standard pipeline flanges, saving valuable space and weight compared to flanged-end check valves—a critical advantage in marine applications. The valve's internal mechanism is designed for quick response and tight sealing, minimizing pressure drop and ensuring efficient system operation.
- Superior Design for Marine & Oil Service: Specifically constructed to handle oil, fuel, and seawater, resisting corrosion and withstanding the vibrations and movements common in marine environments.
- Space-Efficient Wafer Construction: The sandwich-style design fits neatly between ANSI or DIN standard flanges, secured by through-bolts, offering a lighter and more compact alternative to traditional check valves.
- CB/T4303 Standard Compliance: Manufactured in strict accordance with the Chinese CB/T4303 standard for marine valves, ensuring design, material, and testing requirements are met for maritime use.
- Reliable Non-Return Function: Features a swing disc or dual-plate design that opens with forward flow and closes swiftly under backflow conditions, protecting pumps and other upstream equipment.
- Durable Material Options: Available in various body and trim materials such as ductile iron with epoxy coating, cast steel, or stainless steel (CF8/CF8M) to match specific fluid compatibility and corrosion resistance needs.
- Low Pressure Drop: The streamlined internal flow path minimizes resistance when the valve is open, contributing to energy efficiency in pumping systems.
To provide a clear overview of its specifications, key parameters for our standard DN300 offering are summarized below. Custom configurations upon request are available to meet your exact project requirements.
| Parameter | Specification |
| Valve Type | Wafer Check Valve |
| Nominal Size (DN) | 300 |
| Pressure Rating (PN) | PN16 (Standard), PN10/PN25 Optional |
| Applicable Standard | CB/T4303 |
| Body Material (Standard) | Ductile Iron (Epoxy Coated) |
| Disc Material | Stainless Steel |
| Seat Seal Material | NBR (Standard), EPDM, FKM Optional |
| Connection | Wafer (Between Flanges) |
| Suitable Media | Oil, Fuel Oil, Seawater |
Choosing our valve brings tangible benefits to your operations. It enhances system safety by reliably preventing reverse flow, which can cause water hammer, pump damage, and contamination. The compact design simplifies installation and maintenance, reducing labor time and costs. Furthermore, its compliance with marine standards provides assurance of quality and suitability for its intended harsh service environment.
Backed by Shanghai Zhibang Valve's manufacturing experience since 2016 and our ISO9001 certified quality management system, this product is a testament to our commitment to reliability. With an annual export value reflecting our global reach across markets including North America, Europe, Southeast Asia, and the Middle East, our products are trusted worldwide. We support this with flexible shipping from major ports like Shanghai and Guangzhou. For a robust, standard-compliant, and space-saving check valve solution for your marine or oil project, contact us for detailed specifications, competitive pricing, and reliable delivery.
Frequently Asked Questions (FAQ)
Q1: What is the main advantage of a wafer-type check valve over other types?
A: The primary advantage is its compact and lightweight design. It installs directly between two pipeline flanges using longer through-bolts, eliminating the need for its own flanges. This saves significant space and weight, which is often crucial in marine and offshore applications.
Q2: Is this valve suitable for use with seawater?
A: Yes, it is designed for marine applications. When ordering, you can specify material combinations such as stainless steel (CF8M) body and trim or appropriate protective coatings (e.g., epoxy) on ductile iron to ensure excellent corrosion resistance against seawater.
Q3: What does compliance with the CB/T4303 standard mean?
A: CB/T4303 is a Chinese professional standard for marine valves. Compliance ensures the valve's design, materials, manufacturing, pressure testing, and performance are suitable for marine and offshore environments, meeting specific requirements for safety and durability.
Q4: Can this valve be installed in any orientation?
A: For optimal performance and to ensure proper disc closure by gravity, it is recommended to install swing-type wafer check valves in horizontal pipelines. Installation in vertical lines (with upward flow) is possible but may require a spring-assisted design; please inquire for such configurations.
Q5: What is the pressure rating of your standard DN300 model?
A: Our standard offering for DN300 is rated for PN16 (16 bar). However, we can provide valves with different pressure ratings like PN10 or PN25 based on your specific system requirements.
Q6: Do you offer different seal material options?
A: Absolutely. The standard seat seal is Nitrile Rubber (NBR), suitable for oils and fuels. We also offer Ethylene Propylene Diene Monomer (EPDM) for hot water and steam, and Fluoroelastomer (FKM/Viton) for higher temperature and chemical resistance. Please specify your media and temperature during inquiry.
Q7: How is the valve tested before shipment?
A> Each valve undergoes rigorous factory testing, which typically includes a shell test (body strength) and a seat leakage test to ensure it meets the specified standards and provides a tight seal against backflow.
Q8: Can you provide valves in sizes other than DN300?
A: Yes. While this listing highlights the DN300 size, Shanghai Zhibang Valve manufactures a wide range of wafer check valves in various sizes from DN50 to DN600. Please contact us with your size and pressure requirements for a quotation.
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