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Help CenterFactory Direct Marine Check Valve Customized Non-Standard 1 Year Warranty & Mill Test Report Included
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Shanghai Zhibang Valve Manufacture Co., Ltd proudly presents our Factory Direct Marine Check Valve – a robust, customized solution engineered for demanding marine and offshore applications. As a trusted manufacturer established in 2016 with an annual export value of US$1–1.5 million and ISO9001 certification, we specialize in producing non-standard check valves tailored to your exact specifications. Every valve comes with a 1-year warranty and a comprehensive Mill Test Report (MTR), ensuring full material traceability and performance verification. Whether you need a unique flange dimension, exotic alloy material, or special pressure rating, our factory direct approach guarantees competitive pricing, fast turnaround, and reliable quality.
Our marine check valves are designed to prevent reverse flow in piping systems used on ships, offshore platforms, and coastal facilities. The customized non-standard capability means we can produce valves that deviate from standard dimensions (e.g., long pattern, short pattern, or custom face-to-face) to fit existing piping layouts. Each unit undergoes rigorous inspection, and the included Mill Test Report provides certified chemical and mechanical properties of the materials used, giving you full confidence in the product integrity.
Below are the key features and technical specifications of our Marine Check Valve:
- Material Options: Available in WCB, CF8, CF8M, Bronze, Duplex Stainless Steel, and other alloys upon request.
- Size Range: From 1/2” to 48”, with custom diameters and end preparations accepted.
- Pressure Classes: 150#, 300#, 600#, 900#, 1500#, 2500# (PN16 to PN420).
- End Connections: Flanged (ASME, DIN, JIS), threaded (NPT, BSP), butt-weld, or wafer style.
- Design Standards: API 602, BS 1868, ASME B16.34, or customer-specific drawings.
- Operation: Swing check, lift check, dual plate check, or silent check mechanism.
- Testing: 100% hydrostatic test and 100% shell test; helium leak test available on request.
- Warranty: 1 year against manufacturing defects.
- Certification: ISO9001:2015 quality management system.
Technical Parameters (Sample Table)
| Parameter | Standard Range | Customization Options |
| Nominal Diameter | DN15 – DN1200 | Any size within machining capacity |
| Working Pressure | 0.1 – 42 MPa | Up to 70 MPa (with special design) |
| Working Temperature | -20°C to +200°C | -196°C to +600°C (cryogenic/high-temp alloys) |
| Body Material | WCB, CF8, CF8M, Bronze | Duplex, Super Duplex, Monel, Hastelloy, etc. |
| Trim Material | 13Cr, SS304, SS316 | Stellite, Tungsten Carbide coating |
| Seat Seal | Metal-to-Metal or Soft Seat (PTFE, PEEK) | High-performance polymer options |
The 1-year warranty covers any manufacturing defects, and our after-sales team provides prompt technical support. The included Mill Test Report details the chemical composition, mechanical properties (tensile, yield, elongation), heat treatment records, and pressure test results for each valve batch. This documentation is essential for ship classification societies and end-user quality audits.
Our factory-direct model eliminates intermediary costs, allowing us to offer competitive prices without compromising quality. With over 8 years of export experience and shipping from ports of Shanghai, Guangzhou, Hong Kong, and Beijing, we serve markets across North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. Our ISO9001-certified production lines ensure consistent quality control from raw material procurement to final packaging.
Why choose Shanghai Zhibang Valve?
- Factory-direct pricing with flexible customization (non-standard dimensions, special materials).
- Full material traceability via Mill Test Reports included with every order.
- Short lead times: standard products ship within 15-30 days; custom orders typically 30-50 days.
- Dedicated engineering team to review your drawings and provide optimal valve solutions.
- Proven track record: US$1M+ annual exports to 15+ countries and regions.
Frequently Asked Questions (FAQ)
Q1: Can you produce a check valve that does not meet standard dimensions?
A: Yes, we specialize in custom non-standard check valves. Send us your drawing or detailed requirements, and our engineers will manufacture exactly to your specifications.
Q2: What materials are available for marine environments?
A: Common materials include Bronze, CF8M (316 stainless steel), Duplex Stainless Steel, and Nickel-Aluminum Bronze. We can also supply Monel or Hastelloy for highly corrosive seawater applications.
Q3: Is the Mill Test Report provided for every valve?
A: Yes, each order includes a Mill Test Report documenting the chemical and physical properties of the materials used, along with test results. Extra copies can be provided upon request.
Q4: What is the minimum order quantity (MOQ)?
A: Our MOQ is typically 1 piece for custom valves. For standard models, we accept small quantities as well.
Q5: How long does the warranty cover?
A: We offer a 1-year warranty against manufacturing defects. This covers repair or replacement of faulty valves (excluding misuse).
Q6: Do you provide third-party inspection?
A: Yes, we can arrange for third-party inspection by BV, Lloyds, DNV, or other agencies at additional cost.
Q7: Can you supply valves with special end connections like AWWA or GOST flanges?
A: Absolutely. We can manufacture flanges according to ASME, DIN, JIS, GOST, AWWA, or any other standard you require.
Q8: What shipping ports do you use?
A: We ship from Shanghai, Guangzhou, Hong Kong, or Beijing – whichever is most convenient for your destination.
Contact us today with your requirements – let our experienced team provide a customized marine check valve solution that meets your exact needs. With factory-direct pricing, included Mill Test Reports, and a solid 1-year warranty, you can rely on Shanghai Zhibang Valve for quality and performance.
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