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Home > Industrial Equipment & Components > Valve > Butterfly Valve > Dual Plate Wafer Check Valve for Ship Engine Fuel Oil and Lube Oil Return Lines, Mill Test Report Provided

Dual Plate Wafer Check Valve for Ship Engine Fuel Oil and Lube Oil Return Lines, Mill Test Report Provided

Dual Plate Wafer Check Valve for Ship Engine Fuel Oil and Lube Oil Return Lines, Mill Test Report Provided thumbnail-3

Dual Plate Wafer Check Valve for Ship Engine Fuel Oil and Lube Oil Return Lines, Mill Test Report Provided thumbnail-4

Dual Plate Wafer Check Valve for Ship Engine Fuel Oil and Lube Oil Return Lines, Mill Test Report Provided thumbnail-5

Dual Plate Wafer Check Valve for Ship Engine Fuel Oil and Lube Oil Return Lines, Mill Test Report Provided photo-1

Dual Plate Wafer Check Valve for Ship Engine Fuel Oil and Lube Oil Return Lines, Mill Test Report Provided photo-2

Dual Plate Wafer Check Valve for Ship Engine Fuel Oil and Lube Oil Return Lines, Mill Test Report Provided photo-3

Dual Plate Wafer Check Valve for Ship Engine Fuel Oil and Lube Oil Return Lines, Mill Test Report Provided photo-4

Dual Plate Wafer Check Valve for Ship Engine Fuel Oil and Lube Oil Return Lines, Mill Test Report Provided photo-5

Product Spotlights

Compact dual plate wafer check valve designed for marine fuel & lube oil return lines. Prevents backflow, protects engine systems. Features quick spring-assisted closure, low pressure drop, and material options for corrosion resistance. ISO9001 manufactured with provided Mill Test Report for quality assurance and class approval support. Suitable for global marine applications.

Negotiable MOQ: 1 Unit (Price negotiable depending on order volume and customization)

Key Specifications

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Application:

Other, Ship Engine Fuel Oil and Lube Oil Return Lines

Standard:

ISO9001 Certified Manufacturing

Type:

Dual Plate Wafer Check Valve

Contact Supplier Request Quote Chat Now

Shanghai Zhibang Valve Manufacture Co.,ltd

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Product Details
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Application Other, Ship Engine Fuel Oil and Lube Oil Return Lines

Standard ISO9001 Certified Manufacturing

Type Dual Plate Wafer Check Valve

Connection Type Wafer

Material Carbon Steel or Stainless Steel (Customizable)

Pressure Rating Available in various classes (e.g., 150, 300)

Size Range Customizable upon request

Feature Mill Test Report Provided

Seat Type Soft Seat or Metal Seat (Optional)

End Connection Standard ANSI, DIN, JIS, GB (Customizable)

As a professional valve manufacturer established in 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing reliable fluid control solutions for the global marine industry. Our Dual Plate Wafer Check Valve is engineered specifically for the demanding environments of ship engine fuel oil and lube oil return lines. This valve is designed to prevent backflow, protect critical engine components, and ensure the safe and efficient operation of your vessel's propulsion system. With our ISO9001 certified manufacturing process and a commitment to quality, we deliver valves that meet the stringent requirements of marine applications worldwide.

The core function of this check valve is to allow fluid flow in one direction while automatically preventing reverse flow, which is crucial for maintaining system pressure and protecting pumps and other upstream equipment. Its compact wafer design makes it an ideal choice for space-constrained engine rooms, offering easy installation between flanges without the need for additional gaskets in many cases.

Key Features and Technical Advantages:

Dual Plate Design: Features two spring-assisted hinged plates that provide quick, positive closure upon flow reversal, minimizing water hammer and pressure surge.
Compact Wafer Body: The lightweight and space-saving wafer style body reduces weight and simplifies installation between ANSI or DIN standard flanges.
Material Versatility: Manufactured from high-grade materials such as carbon steel (WCB) or stainless steel (CF8M/316), offering excellent resistance to corrosion from fuel oils and lubricants.
Reliable Sealing: Available with various seat options including resilient seals (e.g., NBR, EPDM) for tight bubble-tight shut-off or metal seats for higher temperature applications.
Low Pressure Drop: The streamlined flow path and dual plate configuration ensure minimal flow resistance, contributing to overall system efficiency.
Spring Assisted Closure: Equipped with springs to ensure rapid and reliable closure even at low flow rates or pressure differentials.

Technical Specifications Table:

Parameter	Specification / Option
Valve Type	Dual Plate Wafer Check Valve
Design Standard	API 594, API 6D, MSS SP-42, ANSI B16.34
Face-to-Face	Per API 594 / ANSI B16.10
Pressure Class	150, 300, 600 (Customizable)
Size Range (Nominal)	2" to 24" (DN50 to DN600), other sizes available upon request
Body Material	Carbon Steel (WCB), Stainless Steel (CF8, CF8M, CF3M), Duplex Steel
Disc/Plate Material	Same as body or with protective coatings
Seat Material	NBR, EPDM, Viton, Metal (SS410, SS316)
Spring Material	Stainless Steel (Inconel optional for harsh service)
Temperature Range	-20°C to 200°C (depends on seat material)
End Connection	Wafer, Lugged Wafer (Optional)
Flange Standards	ANSI B16.5, DIN, JIS, GB, BS

Benefits for Your Marine Application:

Enhanced System Protection: Prevents backflow of fuel or lube oil, safeguarding pumps, filters, and tanks from contamination and damage.
Operational Safety: Contributes to a safer engine room environment by maintaining proper flow direction in critical return lines.
Reduced Maintenance: Durable construction and reliable operation lead to fewer failures and lower lifetime maintenance costs.
Documented Quality: Each valve is supplied with a Mill Test Report (MTR), providing traceability for material chemistry and mechanical properties, which is often required for marine class approvals.
Global Compliance: Suitable for vessels operating in markets worldwide, including North America, Europe, Asia, and beyond.

Shanghai Zhibang Valve has established a strong presence in international markets, exporting to over a dozen regions including North America, Southeast Asia, Europe, and Africa. Our annual export value of US$1 Million - US$1.5 Million is a testament to the trust placed in our products by shipowners, shipyards, and marine equipment suppliers globally. We ship efficiently from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing. When you choose our Dual Plate Wafer Check Valve, you are not just buying a component; you are investing in the reliability of your vessel's engine systems, backed by our ISO9001 quality management system and comprehensive material documentation. Contact us today to discuss your specific requirements for fuel oil and lube oil return lines, and let us provide you with a valve solution that ensures performance and peace of mind.

Frequently Asked Questions (FAQ)

Q: What is the main advantage of a dual plate design over a single plate swing check valve for marine fuel lines?
A: The dual plate design offers a more compact size, faster closing action to prevent slam, and typically has a lower pressure drop. This makes it particularly suitable for the pulsating flows often found in engine return lines and where space in the engine room is limited.
Q: Can this valve be used for both fuel oil and lube oil return lines?
A: Yes, it is specifically designed for such applications. However, material selection (body, seat, seal) should be confirmed based on the specific oil type, temperature, and any additives present to ensure long-term compatibility and performance.
Q: What does "Mill Test Report Provided" mean, and why is it important?
A: A Mill Test Report (MTR) is a certified document from the material mill that details the chemical composition and mechanical properties of the raw materials used to manufacture the valve. It is crucial for quality traceability, compliance with classification society rules (like ABS, DNV, LR), and ensures the material meets the specified grade.
Q: Is the valve suitable for vertical installation?
A: Yes, dual plate wafer check valves can generally be installed in both horizontal and vertical pipelines with upward flow. For vertical installation, the flow direction must be upward to allow the plates to open properly. Confirm the specific orientation requirements with our technical team.
Q: Do you offer different pressure class ratings?
A: Absolutely. We can provide valves in standard pressure classes such as 150, 300, and 600, or other ratings as required by your system design pressure. This information should be specified at the time of inquiry.
Q: What flange standards do you support?
A: We manufacture valves to match common international standards including ANSI, DIN, JIS, GB, and BS. Please specify your required flange standard, pressure class, and facing (RF, FF) when ordering.
Q: How does the spring mechanism work, and is it serviceable?
A: The springs assist in closing the plates rapidly once forward flow stops or reverses, preventing slow closure that can cause water hammer. The spring assembly is typically internal and non-serviceable in standard designs, but it is built for long service life. Special designs can be discussed.
Q: What is your lead time for an order of these valves?
A: Lead time depends on the specifications, quantity, and current production schedule. For standard configurations, it is typically shorter. We provide estimated lead times upon receipt of your detailed inquiry and work to meet project deadlines.