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Home > Industrial Equipment & Components > Valve > Butterfly Valve > Mill Test Report Provided With Every Custom Marine Butterfly Valve Order

Mill Test Report Provided With Every Custom Marine Butterfly Valve Order

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Product Spotlights

Every custom marine butterfly valve order includes a full Mill Test Report (MTR) for complete material traceability, essential for class society approvals. Manufactured with marine-grade materials (stainless steel, bronze) and customizable in size (2"-48"), configuration, and actuation. Designed for harsh environments with corrosion-resistant features and bubble-tight sealing. ISO9001-certified production ensures reliable performance for seawater, ballast, and fuel systems on ships and offshore platforms.

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

Key Specifications

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Application:

Other, Seawater cooling

Material:

Marine grade stainless steel, bronze, cast steel

Size Range:

Customizable from 2 inches to 48 inches

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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
Company Profile
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Application Other, Seawater cooling

Material Marine grade stainless steel, bronze, cast steel

Size Range Customizable from 2 inches to 48 inches

Configuration Wafer, Lug, Double Flanged

Actuation Manual lever, gear, electric, pneumatic, hydraulic

Seat Material EPDM, NBR, Viton, PTFE

Body Coating/Finishing Epoxy coating, galvanized, passivation

Connection Standard ANSI, JIS, DIN, GB, BS

Pressure Rating Customizable (e.g., 150LB, 300LB)

Temperature Range Customizable based on seat material

As a dedicated manufacturer of industrial valves since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. understands the critical demands of the global maritime industry for reliable and traceable fluid control solutions. We specialize in providing custom marine butterfly valves, each order backed by a comprehensive Mill Test Report (MTR) that verifies the material pedigree and quality from raw stock to finished product. This commitment to transparency and documentation is not an add-on but a standard practice, ensuring our clients in shipbuilding, offshore platforms, and marine engineering receive components with fully auditable quality assurance. Our valves are engineered to withstand the harsh marine environment, offering dependable performance for seawater, ballast, fuel, and other critical shipboard systems.

Our custom marine butterfly valves are designed to meet the precise specifications of your project. We offer a wide range of configurations and materials to suit various applications and operational conditions onboard vessels and offshore structures.

Material Integrity & Traceability: Every valve is constructed from certified materials. The provided Mill Test Report details the chemical composition and mechanical properties (yield strength, tensile strength, elongation) of the metal used for the disc, body, and stem, ensuring compliance with specified grades like CF8M (316 stainless steel), bronze, or cast steel. This documentation is crucial for class society approvals and maintenance records.
Robust Design for Marine Service: Our valves feature designs resistant to corrosion, cavitation, and biofouling. Key features include:
- Corrosion-Resistant Components: Stainless steel shafts, specially coated or treated discs, and marine-grade seals.
- Bubble-Tight Sealing: Utilizing high-performance seat materials like EPDM, Viton, or PTFE to ensure zero leakage in both directions, essential for critical isolation duties.
- Multiple Actuation Options: Available with manual lever handles, gear operators, or automated actuators (electric, pneumatic, hydraulic) for remote or centralized control systems.
Custom Engineering & Configuration: We do not offer a one-size-fits-all solution. Our engineering team works with you to tailor the valve to your system's needs. Customizations can include:
- Specific face-to-face dimensions to fit existing piping.
- Special porting or connection types (lug, wafer, double flanged).
- Unique pressure and temperature ratings.
- Special coatings like epoxy for extra corrosion protection in seawater applications.

Below is a reference table outlining some of our standard customizable specifications:

Parameter	Typical Options / Range
Nominal Diameter (Size)	DN50 - DN1200 (2" - 48")
Pressure Rating	PN10, PN16, PN25; 150LB, 300LB (Customizable)
Body & Disc Material	316/316L Stainless Steel, Bronze, Cast Steel, Duplex Steel
Stem Material	Stainless Steel (17-4PH, 316), Monel
Seat Material	EPDM, NBR, Viton, PTFE, HNBR
Operating Temperature	-20°C to +200°C (Depends on seat material)
Connection Standard	ANSI, JIS, DIN, GB, BS
Actuation Type	Manual Lever, Gear, Electric Actuator, Pneumatic Actuator

Benefits for Your Project:

Simplified Compliance & Documentation: The included MTR streamlines the process for obtaining approvals from classification societies (e.g., ABS, DNV, LR, BV) and simplifies your own quality control and audit procedures.
Enhanced System Reliability & Safety: Knowing the exact material properties allows for precise engineering calculations, leading to safer and more reliable fluid systems onboard.
Reduced Lifecycle Costs: Durable materials and proper specification minimize maintenance, repair, and premature replacement costs over the vessel's lifespan.
Supply Chain Confidence: Full traceability mitigates risks associated with material substitution or non-conformance, protecting the integrity of your entire project.

With an annual export value between US$1 Million and US$1.5 Million and a presence in key global markets including North America, Southeast Asia, Europe, and the Middle East, Shanghai Zhibang has established itself as a trusted partner for marine valve solutions. Our ISO9001-certified manufacturing processes underpin every valve we produce, ensuring consistent quality. We support flexible logistics with major shipment ports in Shanghai, Guangzhou, Hong Kong, and Beijing. When you choose our custom marine butterfly valves, you are not just purchasing a component; you are investing in a documented, reliable, and fully traceable solution backed by a manufacturer with proven international experience. Contact us today to discuss your specific requirements and receive a detailed quotation with full material certification outlined.

Frequently Asked Questions (FAQ)

Q: What exactly is included in the Mill Test Report (MTR) provided with each valve?
A: The MTR is a certified document from the material mill. It typically includes the heat/lot number, material grade/standard (e.g., AISI 316L), full chemical analysis, and results of mechanical tests like tensile strength, yield strength, and elongation. It provides full traceability of the raw material used in your valve.
Q: Are your valves suitable for approval by major marine classification societies?
A: Yes, our valves are manufactured to meet international standards commonly required by class societies. The provision of a complete MTR is a fundamental requirement for such approvals (e.g., ABS, DNV-GL, Lloyd's Register). We can guide you on the specific documentation needed for your class submission.
Q: What is the typical lead time for a custom marine butterfly valve order?
A: Lead time varies based on the complexity of customization, size, material, and quantity. Standard custom configurations generally have a lead time of 4-8 weeks. We provide a precise timeline upon confirmation of your technical specifications.
Q: Can you supply valves with specific coatings for seawater service?
A: Absolutely. We offer various protective coatings such as epoxy coatings, galvanization, or passivation treatments specifically designed to enhance corrosion resistance in aggressive seawater environments. This can be specified during the customization process.
Q: Do you offer pressure testing and other factory acceptance tests (FAT)?
A> Yes, standard factory tests include shell strength tests and seat leakage tests according to relevant standards (e.g., API 598, ISO 5208). Test reports can be provided. Witnessed FAT can be arranged upon request.
Q: What types of end connections are available for marine piping systems?
A: We offer all common types: Wafer-style for installation between flanges, Lug-style for end-of-line service or dead-end pressure, and Double Flanged for standard bolted connections. The choice depends on your piping design and installation requirements.
Q: How do I select the appropriate seat material for my application (e.g., seawater, fuel oil)?
A: Seat material selection is critical. EPDM is excellent for fresh and seawater; Viton (FKM) is suitable for fuels, oils, and higher temperatures; PTFE offers broad chemical resistance. Our technical team can recommend the optimal material based on the fluid media, temperature, and pressure.
Q: What are your main shipping terms and ports?
A: We operate on standard international trade terms (FOB, CIF, etc.). Our primary ports of shipment are Shanghai, Guangzhou, Hong Kong, and Beijing, offering flexibility for global logistics to our main markets worldwide.