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As a leading manufacturer with ISO9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing high-performance fluid control solutions for demanding marine environments. Our Marine Pressure Gauge Valve CB312-77 is engineered to deliver exceptional reliability and precision in monitoring critical system pressures onboard vessels. Designed with robust construction and backed by comprehensive Mill Test Reports, this valve ensures accurate pressure readings while protecting sensitive gauges from pulsation, vibration, and media contamination, making it an indispensable component for safe and efficient maritime operations.
The CB312-77 valve is meticulously crafted to meet the rigorous standards of the marine industry. Its primary function is to isolate the pressure gauge from the process line, allowing for safe gauge maintenance, calibration, or replacement without system shutdown. This not only enhances operational safety but also reduces downtime and maintenance costs. The valve's design incorporates features that dampen pressure pulsations and minimize gauge needle flutter, leading to more stable and accurate readings. Constructed from premium materials such as naval brass or 316 stainless steel, it offers superior resistance to corrosion from saltwater, chemicals, and harsh marine atmospheres, ensuring long service life even in the most challenging conditions.
Key Technical Features & Advantages:
- Superior Isolation & Shut-off: Provides a reliable bubble-tight seal to completely isolate the gauge, enabling zero-pressure maintenance.
- Pulsation Dampening: Integrated design helps stabilize gauge readings by smoothing out pressure fluctuations common in hydraulic and pneumatic systems.
- Full Port Design: Minimizes pressure drop across the valve, ensuring the gauge reflects the true system pressure.
- Robust Construction: Manufactured from forged brass or stainless steel bodies with precision-machined internals for durability.
- Versatile Configurations: Available in various connection types (NPT, BSPP, BSPT) and port sizes to fit diverse international piping standards.
- Enhanced Safety: The ability to isolate and vent pressure before gauge removal significantly reduces risks for personnel.
Detailed Specifications:
| Parameter | Specification |
| Model | CB312-77 |
| Primary Material | Forged Brass / 316 Stainless Steel |
| Pressure Rating | Up to 6000 PSI (413 bar) - Customizable |
| Temperature Range | -20°C to 150°C (-4°F to 302°F) |
| Connection Threads | NPT, BSPP, BSPT (Standard) |
| Standard Port Sizes | 1/4", 3/8", 1/2", 3/4" |
| Seal Material | PTFE, Viton (Optional) |
| Operation | Manual (Handwheel or Lever) |
| Compliance | Manufactured under ISO9001 QMS |
Benefits for Your Operations:
- Increased Gauge Longevity: Protects expensive pressure gauges from sudden pressure spikes and corrosive media.
- Reduced Operational Costs: Enables in-line maintenance, eliminating the need for full system depressurization and saving time.
- Improved System Accuracy: Stable readings facilitate better process control and decision-making.
- Global Compliance Support: Materials and MTR documentation aid in meeting classification society and regulatory requirements for marine assets.
- Supply Chain Reliability: As an established manufacturer since 2016, we ensure consistent quality and on-time delivery for projects worldwide.
Trust in a product backed by verifiable quality. Every Marine Pressure Gauge Valve CB312-77 from Shanghai Zhibang includes a Mill Test Report (MTR), providing full traceability of material chemistry and mechanical properties—a critical document for audit trails and quality assurance in marine projects. Our commitment to the ISO9001 quality management system underpins our manufacturing process, ensuring every valve meets stringent performance criteria. With an annual export value reflecting our global reach across markets from North America and Europe to Southeast Asia and Oceania, we have proven our capability to support international marine fleets and shipyards. Choose the CB312-77 for a reliable, documented, and performance-driven solution that safeguards your instrumentation and optimizes your vessel's operational integrity.
Frequently Asked Questions (FAQ)
Q1: What is the primary purpose of this gauge valve on a marine vessel?
A: The primary purpose is to act as an isolation and shut-off valve for pressure gauges. It allows crew to safely isolate the gauge from high-pressure systems for maintenance, calibration, or replacement without needing to depressurize the entire line, enhancing safety and operational efficiency.
Q2: Why is the included Mill Test Report (MTR) important?
A: The MTR is a certified document from the material mill that details the chemical composition and mechanical properties of the metal used. For marine applications, this report is often required by classification societies (like ABS, DNV, LR) and clients to verify material quality, traceability, and compliance with specifications, ensuring the valve's suitability for critical service.
Q3: Can this valve handle seawater directly?
A: When constructed from appropriate materials like 316 stainless steel or specially treated naval brass, the valve offers good resistance to corrosion from seawater. However, its primary role is typically in hydraulic, lube oil, fuel, air, or freshwater systems. For direct seawater service, specifying 316 stainless steel or higher-grade alloys is recommended.
Q4: What pressure ratings are available?
A: The standard CB312-77 model is designed for high-pressure applications, with ratings available up to 6000 PSI. We can customize the pressure rating based on your specific system requirements. Please provide your operating pressure details for a tailored solution.
Q5: Are different thread standards available to match my existing piping?
A: Yes. We commonly supply valves with NPT (American), BSPP (British parallel), or BSPT (British taper) threads. It is crucial to specify your required thread type and size (e.g., 1/2" NPT) when inquiring to ensure a proper fit.
Q6: How does this valve help with gauge accuracy?
A: The valve design often incorporates a pulsation dampening feature. This helps to smooth out rapid pressure fluctuations in the system, reducing gauge needle vibration and providing a more stable, readable, and accurate pressure indication.
Q7: Do you offer customization for specific project needs?
A: Absolutely. As a manufacturer, we can customize various aspects including material grade, pressure rating, connection types, port sizes, and even the sealing materials to be compatible with specific media (like oil, fuel, or chemicals). Contact us with your specifications.
Q8: What is your shipping capability for international marine projects?
A: We regularly export to global markets, including North America, Europe, Asia, Africa, and Oceania. We ship majorly from ports in Shanghai, Guangzhou, Hong Kong, and Beijing, offering flexible logistics solutions to meet project timelines anywhere in the world.
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