Contact Platform Support
Help Center316 Stainless Steel Marine Check Valve Customized Non-Standard DN50-DN300 PN16 Flanged End
Product Spotlights
Related Products
-
Bronze Marine Check Valve Customized Non-Standard 3/4"-4" Threaded End Suitable for -20°C to 180°CNegotiableMOQ: 1 Unit -
Shipbuilding Industry Marine Check Valve Customized Non-Standard Designed for Ballast Water SystemsNegotiableMOQ: 1 Unit
-
Marine Check Valve Customized Non-Standard With 316L Trim & PTFE Seat Rated Class300 Socket WeldNegotiableMOQ: 1 Unit
-
Custom Engineering Marine Check Valve Non-Standard Design per Drawing With 24/7 Technical SupportNegotiableMOQ: 1 Unit
-
Factory Direct Marine Check Valve Customized Non-Standard 1 Year Warranty & Mill Test Report IncludedNegotiableMOQ: 1 Unit
Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our 316 Stainless Steel Marine Check Valve – a high-performance, corrosion-resistant solution specifically engineered for demanding marine and offshore environments. Designed with a customized non-standard configuration in sizes from DN50 to DN300 and a PN16 flanged end, this check valve guarantees reliable backflow prevention under harsh conditions. Backed by our ISO9001-certified manufacturing facility and over a decade of valve expertise, we ensure every unit meets the highest standards of durability and precision.
Our check valve is built to withstand saltwater, high humidity, and fluctuating pressures typical of marine applications. The 316 stainless steel (CF8M) body and internal parts offer superior resistance to pitting and crevice corrosion compared to 304 stainless steel. Whether you need a standard swing check or a custom lift check design, our engineering team can tailor the product to your exact specifications – including non-standard flanges, face-to-face dimensions, and special coatings.
Key features of this valve include a flanged end design per ANSI B16.5 / DIN EN 1092-1 (optional), a PN16 pressure rating, and availability in both wafer and lug configurations on request. The valve is suitable for water, oil, gas, and chemical media. Below is a quick reference of the main specifications:
| Parameter | Details |
|---|---|
| Size Range | DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300 |
| Pressure Rating | PN16 (16 bar / 232 psi) – other ratings available upon request |
| Connection | Flanged end (RF or FF; standard or custom drilling pattern) |
| Body Material | 316 Stainless Steel (CF8M), with optional CTFE, PTFE, or EPDM seals |
| Disc / Seat Material | 316 SS / PTFE or metal-to-metal seat – customizable |
| Operation | Automatic (gravity or spring assisted) |
| Design Standard | API 6D, BS 1868, or custom non-standard design |
| Testing | 100% hydrostatic shell and seat test; optional NDT available |
Product Advantages & Customer Benefits:
- Corrosion resistance: 316 stainless steel ensures long service life in seawater, chlorides, and acidic media – ideal for shipboard systems, desalination plants, and offshore platforms.
- Non-standard customization: We can modify face-to-face dimensions, flange drillings (ANSI, DIN, JIS, GB), disc type (swing, tilting disc, dual plate), and even offer special end preparations like grooved ends for unique installation requirements.
- Zero leakage performance: Precision lapped seats and optional soft seals (PTFE or elastomer) provide bubble-tight shutoff at low and high pressures.
- Low pressure drop: Streamlined flow path minimizes head loss – particularly important in pumping systems to reduce energy consumption.
- Easy maintenance: Bolted bonnet or threaded cover design allows quick disassembly for inspection and cleaning without removing the valve from the pipeline.
- Global compatibility: Flanged ends conform to international standards (ANSI 150, PN16, PN25, etc.) – we produce according to your local specifications.
- Comprehensive quality control: Each valve is tested per ISO 5208 and API 598; material certificates (EN 10204 3.1) are available upon request.
Technical Specifications (Detailed):
- Body & Bonnet: 316 stainless steel investment casting or fabricated – thickness designed for PN16/Class 150 with ample safety factor.
- Disc: 316 SS, fully guided by a central stem or hinge pin; optional disc coatings (Halar, Xylan, or Teflon) for abrasive media.
- Seat: Integral or replaceable seat ring in 316 SS or Stellite – metal seat suitable for high-temperature applications up to 400°C (752°F); soft seat for bubble-tight shutoff at lower temperatures.
- Spring: Optional spring-assisted closing (for horizontal or vertical installations) – spring material 316 SS or Inconel upon customer choice.
- Gasket & Packing: Non-asbestos compressed fiber, graphite, or PTFE – environmentally friendly and leak-free.
- Testing: Shell test at 1.5× PN (24 bar), seat test at 1.1× PN (17.6 bar) – both in accordance with international standards.
Why Choose Shanghai Zhibang Valve for Your Marine Check Valve?
Since our establishment in 2016, we have dedicated ourselves to manufacturing high-quality valves for a diverse global market. Our factory is ISO9001 certified, ensuring every production step – from raw material inspection to final pressure testing – follows strict quality procedures. We export US$1 million to US$1.5 million annually, serving clients across North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, East Asia, Western Europe, Central America, Northern Europe, Southern Europe, South Asia, and the domestic Chinese market. Our valves are shipped from major ports including Shanghai, Guangzhou, Hong Kong, and Beijing, with reliable logistics partners to meet your delivery schedules.
We understand that marine applications demand robust, long-lasting components. Our customized check valves are already used in shipbuilding, offshore oil & gas platforms, ballast water treatment systems, and coastal water treatment plants. With our in-house engineering team, we can provide detailed dimensional drawings, stress analysis, and 3D models to ensure the valve perfectly integrates into your piping system. Every order receives a dedicated customer service representative from quotation to after-sales support.
Frequently Asked Questions (FAQ):
1. Can you customize the flanged end drilling pattern to match existing pipes?
Yes, we routinely produce non-standard flange drillings according to customer drawings or samples. We can match ANSI, DIN, JIS, GB, or other standards – just provide the detailed specifications.
2. What is the typical lead time for a non-standard check valve DN200 PN16?
Lead time depends on quantity and complexity. For a single custom valve, it usually ranges from 15 to 25 working days. For bulk orders, we can schedule production to meet your deadline.
3. Is this valve suitable for vertical installation?
Yes – we offer spring-assisted closing (optional) that makes the valve work in both horizontal and vertical (upward flow) orientations. For vertical downward flow, a specific spring design is required.
4. What certificates do you provide with the valve?
Standard certificates include material test reports (MTR) for the body and trim, pressure test certificate, and ISO9001 quality certificate. Additional certifications (e.g., DNV/GL, ABS, Lloyd's) can be arranged at extra cost if needed.
5. Can the valve handle seawater with high chloride content?
Absolutely – 316 stainless steel offers excellent resistance to chloride-induced stress corrosion cracking. For extremely aggressive environments, we can recommend a duplex stainless steel (2205) option.
6. Do you provide a warranty?
Yes, we offer a standard 12-month warranty from the date of shipment against manufacturing defects. Extended warranty up to 24 months is available upon request.
7. What is the difference between a swing check and a lift check valve?
A swing check uses a hinged disc that swings open with forward flow and closes by gravity/reverse flow – low pressure drop but requires some back pressure. A lift check uses a disc that lifts perpendicular to the seat – tighter shutoff but higher head loss. We can supply either type based on your system requirements.
8. Can I get a sample of the DN50 check valve for testing?
Yes, sample orders are welcome. We can produce a standard or custom sample for qualification. Sample cost and shipping are negotiable.
Conclusion: Your Reliable Partner for Marine Check Valves
With years of experience, a proven export track record, and ISO9001 quality assurance, Shanghai Zhibang Valve Manufacture Co., Ltd. is your trusted source for customized 316 stainless steel marine check valves. Whether you need a standard PN16 flanged valve or a fully custom non-standard design from DN50 to DN300, we have the technical capability and production flexibility to deliver. Contact us today to discuss your project – we are ready to provide a competitive quote and engineering support.
Send Inquiry to This Supplier
You May Also Like
-
CB/T4303 Marine Butterfly Check Valve | Wafer Dual Plate Non-Return Valve For Seawater Oil PipelineNegotiableMOQ: 10 Units
-
Plate Type Check Valve for Water Treatment Systems (CBT3819-1999) ZhibangNegotiableMOQ: 20 Units
-
CBT3819-1999 Plate Type Check Valve With 10 Bar Working Pressure ZhibangNegotiableMOQ: 20 Units
-
Flange-End Plate Type Check Valve (CBT3819-1999) for Industrial Piping ZhibangNegotiableMOQ: 20 Units
-
CBT3819-1999 Plate Type Check Valve With 316 Stainless Steel Construction ZhibangNegotiableMOQ: 20 Units
-
CBT3819-1999 Plate Type Check Valve for Chemical Processing Applications ZhibangNegotiableMOQ: 20 Units
-
DN50 Plate Type Check Valve Compliant With CBT3819-1999 Standard ZhibangNegotiableMOQ: 20 Units
-
High-Pressure Plate Type Check Valve (CBT3819-1999) for Hydraulic Systems ZhibangNegotiableMOQ: 20 Units
-
CBT3819-1999 Plate Type Check Valve With PTFE Sealing for Corrosion Resistance ZhibangNegotiableMOQ: 20 Units
-
Reliable Plate Type Check Valve (CBT3819-1999) With Technical Support ZhibangNegotiableMOQ: 20 Units
