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Help CenterMarine External Thread Bronze Right-Angle Steam Safety Valve CBT3192 With Mill Test Report
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As a professional manufacturer of industrial valves since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents the CBT3192 Marine External Thread Bronze Right-Angle Steam Safety Valve. Engineered specifically for the demanding environment of marine applications, this valve is a critical component for protecting boiler systems and steam pipelines from dangerous overpressure conditions. We combine robust bronze construction with precise engineering to deliver a reliable, durable safety solution that ship operators and marine engineers can trust. Every valve is backed by a comprehensive Mill Test Report, ensuring full traceability and material compliance for your project documentation.
The primary function of this safety valve is to automatically release excess pressure from steam systems, preventing potential equipment failure and ensuring operational safety. Its right-angle design is particularly advantageous in space-constrained engine rooms, allowing for efficient piping layout. The external thread connections facilitate secure and leak-resistant installation into various marine fittings.
- Marine-Grade Bronze Body: Manufactured from high-quality bronze alloys (typically CuZn40Pb2), offering excellent resistance to corrosion from steam and seawater atmospheres, ensuring long service life in harsh marine conditions.
- Right-Angle Configuration: The 90-degree outlet design provides flexibility in piping installation, helping to optimize the use of valuable space within marine engine compartments and boiler rooms.
- External Thread Connections: Features male threads (common standards include BSP or NPT) for a robust and sealed connection to female threaded ports on boilers, pressure vessels, or steam lines.
- Precise Blow-off Pressure Setting: The valve is set to open at a specific, predetermined pressure. This setting is carefully calibrated to match the safe working pressure of the protected system, ensuring it activates only when necessary.
- Positive Resealing Action: Designed to close tightly once system pressure returns to a safe level below the set point, minimizing steam loss and maintaining system efficiency.
- Rugged Internal Components: Includes a durable disc and seat arrangement made from compatible materials to withstand repeated cycling and high-temperature steam exposure.
- Lever for Manual Testing: Most models include a manual lever, allowing crew to periodically test the valve's lifting function to verify it is not stuck, a crucial maintenance practice for marine safety.
The technical specifications of the CBT3192 valve are designed to meet the rigorous demands of marine service. Below is a summary of typical parameters; specific values can be customized based on your system requirements.
| Parameter | Specification / Description |
| Model | CBT3192 (Right-Angle, External Thread) |
| Primary Material | Bronze Body & Trim |
| Connection Type | External (Male) Thread, Inlet & Outlet |
| Thread Standard | BSP (G) or NPT (available upon request) |
| Nominal Pressure (PN) | Typically Class 150 / PN16 (Higher classes optional) |
| Set Pressure Range | Customizable, common range for marine boilers (e.g., 0.1-1.6 MPa) |
| Suitable Medium | Saturated Steam, Air, Non-corrosive Gases |
| Max. Inlet Temperature | Up to 250°C (482°F) for steam service |
| Testing & Documentation | Factory pressure tested. Mill Test Report (MTR) supplied. |
Choosing our marine safety valve provides distinct advantages for your operations. The bronze construction directly combats the corrosive marine environment, reducing maintenance frequency and replacement costs. The inclusion of a Mill Test Report with every unit simplifies compliance with classification society surveys and port state controls, as it provides verifiable proof of material quality. The right-angle design offers practical installation benefits, making it easier to fit into complex piping arrangements common on vessels. Furthermore, the reliable and repeatable popping and resealing performance ensures your steam system operates within its safe pressure envelope, protecting valuable assets and, most importantly, crew safety.
Shanghai Zhibang's commitment to quality is underscored by our ISO9001 certification, which governs our manufacturing and quality control processes. With an annual export value ranging between US$1 Million and US$1.5 Million, our products, including the CBT3192 valve, have gained the trust of clients across North America, South America, Europe, Asia, Africa, and Oceania. We ship efficiently from major ports like Shanghai, Guangzhou, and Hong Kong, ensuring reliable delivery to global shipyards and marine suppliers. Our focus as a manufacturer allows us to offer competitive pricing without compromising on the material integrity and performance verification provided by the Mill Test Report. For your next marine boiler or steam system project, specify a valve built with proven materials and backed by transparent documentation.
Frequently Asked Questions (FAQ)
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Q: What is the main purpose of this valve on a ship?
A: Its primary role is to act as a last line of defense for marine boilers and steam piping. It automatically opens to discharge steam if pressure exceeds a safe limit, preventing catastrophic failure and ensuring the safety of the vessel and crew. -
Q: Why is bronze a suitable material for marine steam valves?
A: Bronze alloys offer a strong combination of strength, machinability, and corrosion resistance. They perform well against steam corrosion and can withstand the salty, humid atmosphere of a marine engine room better than many other metals. -
Q: Can the set pressure of the valve be adjusted on-site?
A: No, the set pressure is calibrated and sealed at the factory. On-site adjustment is not recommended as it requires specialized tools and knowledge to ensure accuracy and safety. Valves should be ordered for your specific required set pressure. -
Q: What is included in the Mill Test Report (MTR)?
A: The MTR is a certificate from the material mill. It typically includes the chemical composition analysis, mechanical properties (like tensile strength), heat number/batch number, and confirms the material meets the specified standard (e.g., ASTM B62). This is crucial for marine certification. -
Q: What thread standards are available for the connections?
A: The standard offering is often BSP (British Standard Pipe) parallel (G) threads, which are common in marine applications worldwide. NPT (National Pipe Tapered) threads are also available as an option upon request to suit different regional standards. -
Q: How often should this safety valve be tested or maintained?
A: According to marine regulations and classification society rules, safety valves must be tested periodically. The manual lever allows for regular operational checks. A full functional test and potential recalibration should be performed as per the vessel's planned maintenance system and regulatory surveys. -
Q: Is this valve suitable for other fluids besides steam?
A: While designed for steam, it can generally be used for other compatible non-corrosive gases like air or nitrogen, provided the temperature and pressure ratings are suitable. It is not recommended for liquids or corrosive chemicals. -
Q: Do you offer different sizes for this model?
A: Yes, the CBT3192 model is typically available in common nominal sizes (e.g., 1/2", 3/4", 1"). Please inquire with your specific size and pressure requirement for availability and pricing.
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