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Help CenterBronze Cock Valve for Marine, DN20, PN25, Socket Weld Ends, Quarter Turn, Blowout-Proof Stem, 1 Year Warranty.
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Shanghai Zhibang Valve Manufacture Co., Ltd., an ISO9001-certified manufacturer established in 2016, proudly presents our Bronze Cock Valve for Marine, DN20, PN25, Socket Weld Ends, Quarter Turn, Blowout-Proof Stem. Engineered for demanding marine environments, this valve combines robust bronze construction with a reliable quarter-turn operation and a blowout-proof stem for enhanced safety. With an annual export value of US$1–1.5 million and serving markets across North America, South America, Europe, Asia, Africa, and Oceania, we ensure every valve meets rigorous quality standards and comes with a 1-year warranty.
The bronze material offers excellent corrosion resistance against seawater and harsh marine conditions, while the socket weld ends provide strong, leak-free connections. The quarter-turn handle allows for quick and easy open/close control, and the blowout-proof stem prevents accidental stem ejection under pressure, ensuring operator safety and system integrity.
Key Features & Benefits
- Corrosion-Resistant Bronze: Ideal for marine applications, resisting saltwater and atmospheric corrosion.
- DN20 & PN25 Rating: Suitable for medium-pressure systems (PN25 = 25 bar) with a nominal diameter of 20 mm.
- Socket Weld Ends: Provide permanent, leak-tight joints for piping systems, eliminating potential leak paths.
- Quarter Turn Operation: Simple 90-degree rotation offers fast actuation, reducing operator fatigue.
- Blowout-Proof Stem: Stem retained by a shoulder or locking mechanism, preventing blowout even at high pressure.
- Versatile Application: Suitable for marine ballast, cooling water, fuel oil, and general seawater systems.
- 1-Year Warranty: Backed by manufacturer’s quality assurance and after-sales support.
Technical Specifications
| Material | Bronze (C83600 or equivalent) |
| Nominal Diameter | DN20 (3/4 inch) |
| Pressure Rating | PN25 (25 bar / 362 psi) |
| End Connection | Socket Weld (per ASME B16.11 or equivalent) |
| Operation | Quarter Turn (90° rotation) |
| Stem Design | Blowout-Proof (anti-blowout shoulder) |
| Warranty | 1 Year |
| Certification | ISO9001:2015 |
Why choose our Bronze Cock Valve? The blowout-proof stem is a critical safety feature, especially in high-pressure marine systems where stem ejection could cause catastrophic failure. The socket weld ends are preferred for permanent installations where vibration resistance is needed. Additionally, the quarter-turn design reduces the time required for valve operation, which is beneficial in emergency shutdown scenarios.
Trust & Reliability
As a manufacturer based in Shanghai, China, Shanghai Zhibang Valve Manufacture Co., Ltd. has been producing high-quality valves since 2016. With an annual export value of US$1 million – US$1.5 million, we ship to major ports including Shanghai, Guangzhou, Hong Kong, and Beijing. Our products are trusted in diverse markets spanning North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and more. Each valve undergoes rigorous quality control under our ISO9001-certified management system. We stand behind our product with a 1-year warranty and responsive technical support.
Contact us today to discuss your marine valve requirements. We offer customization options (e.g., different sizes, pressure ratings, end connections) upon request. Our experienced team is ready to provide competitive pricing and reliable delivery.
Frequently Asked Questions
Q1: What is the maximum working pressure of this valve?
A: The valve is rated PN25, which corresponds to a maximum working pressure of 25 bar (approximately 362 psi) at ambient temperature for water/oil/gas. For higher temperatures, please consult our technical team.
Q2: Can this valve be used for potable water systems?
A: While bronze is generally safe for potable water, this specific valve is designed for marine applications. Please contact us for valves with appropriate coatings or certifications for drinking water.
Q3: What does “blowout-proof stem” mean?
A: It means the stem is mechanically retained (e.g., by a shoulder or pin) so that even if the handle is removed or the stem packing fails, the stem cannot be forcibly ejected from the valve body under pressure, preventing accidents.
Q4: Are socket weld ends compatible with Schedule 40 pipes?
A: Yes, the socket weld ends are designed to fit standard pipe schedules. For specific pipe dimensions, please provide your pipe OD and wall thickness for confirmation.
Q5: What is the warranty coverage?
A: We offer a 1-year warranty covering manufacturing defects. The warranty does not cover damage caused by misuse, improper installation, or normal wear.
Q6: Do you offer valves in other sizes or pressure ratings?
A: Yes, we manufacture a range of bronze valves in sizes from DN15 to DN50 and pressure ratings from PN16 to PN40. Custom sizes are available upon request.
Q7: Is the valve suitable for seawater service?
A: Yes, bronze is highly resistant to seawater corrosion. However, for long-term immersion, we recommend periodic inspection and optional protective coatings.
Q8: What is the lead time for this valve?
A: Standard lead time is 15-30 working days, depending on order quantity. Expedited shipping options are available. Please contact our sales team for specifics.
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