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Help CenterBronze Check Valve for Marine Seawater, Full Bore DIN 3352, 304SS Spring, 150Lb Flange
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Shanghai Zhibang Valve Manufacture Co., Ltd. (established 2016) is a professional manufacturer specializing in high-quality industrial valves for marine, water treatment, and oil & gas applications. Our Bronze Check Valve for Marine Seawater, Full Bore DIN 3352, 304SS Spring, 150Lb Flange is designed to withstand the harsh marine environment and deliver reliable, long-lasting performance. With an annual export value of US$1–1.5 million and ISO9001 certification, we ensure every valve meets strict quality standards. This check valve is ideal for seawater intake, discharge lines, and other corrosive fluid systems, offering a full bore design for minimal pressure loss and a 304 stainless steel spring for rapid closing action.
Our full bore (full opening) design eliminates flow restrictions, making it suitable for high-flow applications. The bronze body provides excellent corrosion resistance against seawater, while the 304SS spring ensures reliable sealing even under low flow conditions. The flanged connections conform to 150Lb (Class 150) standards, compatible with ANSI B16.5 or DIN flanges. Below are the key technical specifications:
| Parameter | Value |
|---|---|
| Material | Bronze (C84400 / C95800) – optional stainless steel |
| Pressure Rating | 150Lb (Class 150) – up to 200°C (customizable) |
| Connection Type | Flanged – ANSI B16.5, DIN, or JIS (upon request) |
| Spring Material | 304 Stainless Steel (316SS optional) |
| Design Standard | DIN 3352 / BS 5153 / API 6D |
| Size Range | DN50 – DN300 (2” – 12”) |
| Operating Temperature | -20°C to +200°C (higher with special materials) |
| Media | Seawater, fresh water, oil, gas, non-aggressive fluids |
Key Features & Benefits:
- Full Bore Design: The full bore (full opening) ensures minimal pressure drop and high flow capacity – ideal for pump discharge lines and marine pipelines.
- Spring-Loaded Disc: The 304SS spring provides quick closing action, preventing reverse flow even at low flow velocities. This reduces water hammer and protects sensitive equipment.
- Corrosion-Resistant Bronze: Bronze alloy (C84400 / C95800) offers excellent resistance to seawater corrosion, biofouling, and dezincification – extending service life in marine environments.
- Flanged Connections: 150Lb flanges match standard ANSI/DIN flanges, making installation easy and secure. Gaskets and bolts are available upon request.
- Low Maintenance: The simple swing-check mechanism with spring assist requires minimal maintenance. The valve can be supplied with a test plug for seat leakage testing.
- Wide Temperature Range: Suitable for temperatures from -20°C to +200°C, covering most marine and industrial applications.
- Customizable Options: Available in different bronze grades, 316SS spring, other pressure ratings (300Lb, 600Lb), and non-standard flange drilling patterns.
Additional Technical Details:
- Test Pressure: Shell test: 1.5 x rated pressure; Seat test: 1.1 x rated pressure (according to API 598 / ISO 5208).
- Face-to-Face Dimension: Conforms to DIN 3352 F2/F4 or ANSI B16.10 (upon request).
- Spring Force: Pre-loaded to ensure tight closure at minimum back pressure (0.05 bar).
- Disc Material: Bronze or optional PTFE-coated for sticky media.
- Gasket: Non-asbestos gasket suitable for seawater.
Trust & Quality Assurance: Shanghai Zhibang Valve Manufacture Co., Ltd. has been a trusted manufacturer since 2016, exporting to North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. Our ISO9001:2015 certified quality management system ensures every valve undergoes rigorous inspection. We offer a 12-month warranty against manufacturing defects. Our main markets cover over 50 countries, and we have shipped more than 100,000 valves to marine, water treatment, and industrial clients. With a dedicated R&D team and fast delivery from Shanghai, Guangzhou, Hong Kong, or Beijing ports, we are your reliable partner for marine check valves.
Frequently Asked Questions (FAQ)
-
Q: Is this valve suitable for continuous seawater exposure?
A: Yes, the bronze body and 304SS spring are specifically chosen for corrosion resistance in seawater. For higher chloride content, we recommend 316SS spring or optional duplex stainless steel internals. -
Q: Can I install this valve vertically?
A: Our spring-loaded check valve can be installed in any orientation, including vertical, as the spring assists the disc closure. However, for optimal performance, horizontal installation is preferred. -
Q: What is the maximum pressure rating?
A: The 150Lb rating corresponds to a maximum allowable working pressure of 20 bar (300 psi) at ambient temperature. For higher pressures, we offer 300Lb or 600Lb versions. -
Q: Do you provide flanges with the valve?
A: The valve itself is supplied with flanged ends. Matching flanges, bolts, and gaskets can be provided as an additional option. -
Q: How do I determine the correct size for my system?
A: For full bore check valves, we recommend selecting a size equal to the pipe diameter to avoid flow restriction. For high-velocity systems, consult our engineering team for sizing assistance. -
Q: Is the spring replaceable?
A: Yes, the spring is a replaceable part. We can supply spare springs of 304 or 316 stainless steel. Seat and disc replacement kits are also available. -
Q: What is the lead time for this valve?
A: Standard sizes (DN50-DN200) are typically in stock and ship within 7–15 days. Larger sizes or custom orders require 20–30 days, depending on quantity. -
Q: Do you have certificates for this product?
A: Our factory is ISO9001:2015 certified. We can provide material certificates (MTC) and inspection reports upon request. Third-party inspection (e.g., Lloyd's, DNV, or ABS) is available at extra cost.
Contact Shanghai Zhibang Valve today to discuss your marine seawater check valve requirements. We offer competitive pricing, fast delivery, and custom solutions to meet your project needs.
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