With bronze's exceptional resistance to seawater corrosion and biofouling, these valves ensure reliable system protection in the demanding shipboard environment where standard materials would rapidly degrade. This article provides essential pricing information and key selection parameters for DN50 bronze safety valves for marine applications.The main safety valve product names of China safety valve Network include:AD Safety Valve Muffler,Bellows Spring Fall Lift SafetyValve,Built-in Safety Valve,Butterfly Spring Type Safety Valve,Vacuum Negative Pressure Safety Valve,Water Heater Safety Valve,YD Type Bursting Disc,Oil Refining Specific Safety Valve,Pulse Safety Valve,Pilot Safety Valve,Pressure Safety Valve,Quick Switching Safety Valve.

Price Reference for DN50 Bronze Safety Valve

Prices for DN50 bronze safety valves vary based on material grade and certification:

Standard cast bronze models for general auxiliary piping typically range from approximately 280 to 850 CNY (about $38 to $117 USD) .

Premium tin bronze models (ZCuSn10Zn2) with higher pressure ratings and hardened sealing surfaces command higher pricing within this range, offering superior corrosion resistance and reliability .

For reference, CB/T304-1992 flanged bronze safety valves from established manufacturers are quoted at approximately 870 CNY per unit for DN50 configurations, with tin bronze body and aluminum bronze trim .

International brand bronze safety valves from manufacturers such as Spirax Sarco or Goetze may range from 4,000+ CNY per unit for premium configurations with full classification society certification .

Key factors affecting price include material grade (ordinary cast bronze vs tin bronze), pressure rating (PN6 to PN16), certification (CCS, ABS, BV, DNV), and connection type .

Bronze Advantages for Marine Seawater Service

Bronze alloys offer several critical advantages for seawater piping systems:

Superior Corrosion Resistance: Bronze is highly resistant to saltwater corrosion and marine biofouling. Tin bronze grades such as ZCuSn10Zn2 provide excellent resistance to seawater impingement and erosion, outperforming standard cast bronze in high-velocity seawater service .

Durability and Reliability: Bronze is durable, corrosion-resistant, and has a high melting point, making it highly versatile for marine and seawater applications .

Technical Specifications

Pressure and Temperature: Bronze safety valves are typically rated to PN16 (1.6MPa) with operating temperatures up to 225°C for steam service . Setting pressure ranges from 0.3MPa to 1.6MPa depending on system requirements .

Materials: Valve body and cover are typically cast tin bronze (ZQSn10-2), with disk and stem in aluminum bronze (QA19-2) for enhanced wear resistance, and PTFE packing for reliable sealing .

Connections: Available with flanged ends per CB/T304-1992, JIS, ISO, or DIN standards . Threaded connections are also available for smaller installations .

Standards: Complies with CB/T304-1992 (Chinese marine standard), with DNV, ABS, BV, and Lloyd's Register certification available upon request .

Marine Applications

Bronze safety valves serve critical functions in seawater cooling systems, ballast and bilge piping, firefighting systems, steam boiler protection, and pump discharge protection .

Selection Considerations

When specifying a bronze safety valve for marine seawater service, verify material grade meets requirements, with tin bronze offering superior corrosion resistance for critical applications. Confirm classification society certification (CCS, ABS, BV, DNV) for newbuilding projects . Verify flange standard matches your existing piping (GB/T, JIS, DIN, ANSI) . Select the appropriate pressure rating based on system operating pressure.

Summary

DN50 bronze safety valves are essential for reliable overpressure protection in marine seawater piping, with prices ranging from approximately 280 to 850 CNY for standard configurations and over 4,000 CNY for premium international brands. Bronze provides the corrosion resistance and durability necessary for shipboard seawater service. Selection requires careful evaluation of material grade, certification, and pressure rating based on application requirements. Consulting with qualified marine valve suppliers who provide classification society certification documentation is strongly recommended.

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