Bronze Gate Valve DN50 Price and Marine Seawater Piping Systems
This article provides comprehensive pricing information and technical selection guidance for DN50 bronze gate valves in marine environments.The main gate valve product names of China gate valve Network include:Sprocket Wafer Knife-shaped Gate Valve,Sprocket Slurry Valve,SCZ Series Flashboard Valve,Slab Gate Valve,Scum Flange Gate Valve,Stainless Steel Flange Gate Valve,Wafer Bevel Gear Knife-shaped Gate Valve,Z41H Manual Flange Cast Iron Gate Valve,ZT9928 Manual Slurry Knife-shaped Gate Valve,Z40/540/940H/Y Cast Steel Pressure Self-tight Gate Valve
Price Reference for Bronze Gate Valve DN50
The price of a DN50 bronze gate valve varies significantly based on material grade, pressure rating, connection type, and manufacturing standard. Below are current market reference points:
Tin bronze gate valves manufactured to CB/T467-95 standard with 0.6MPa pressure rating range from approximately 188 to 550 RMB, offering a cost-effective solution for general marine seawater service where pressures are moderate .
Nickel-aluminum bronze C95800 valves with ANSI 150LB rating are priced around 2000 RMB, reflecting the superior strength and corrosion resistance of this advanced material for high-velocity seawater applications .
For marine grade aluminum bronze valves (NAB) conforming to ASTM B148 C95800, Indian market pricing indicates approximately 2321 to 6562 Indian Rupees per unit depending on valve type and configuration .
Bulk discounts are typically available for larger orders, while non-standard flanges such as JIS, ANSI, or DIN configurations may incur additional costs .
Technical Specifications for Marine Seawater Service
When selecting a bronze gate valve for shipboard seawater piping, the following technical parameters must be verified:
Material Selection
Bronze alloys provide excellent resistance to seawater corrosion and biofouling. For general seawater service, tin bronze (ZCuSn10Zn2) offers a cost-effective balance of performance and price . For high-velocity seawater applications, nickel-aluminum bronze C95800 provides enhanced strength and resistance to impingement attack .
High-tensile bronze alloy stems resist galling and wear over repeated open/close cycles, reducing unplanned downtime in marine environments .
Pressure and Temperature Ratings
Common pressure ratings for bronze gate valves include JIS 5K (hydrostatic shell test at 1.05 MPa, seat test at 0.7 MPa) and JIS 10K classes, as well as ANSI 150LB and PN25 configurations . Operating temperature ranges from -10 degrees Celsius to 170 degrees Celsius depending on the specific design and material composition .
Valve Design and Standards
DN50 bronze gate valves are available in rising stem and non-rising stem configurations. Rising stem designs provide a visual indicator of open/closed status, while non-rising stem designs are preferred in confined spaces where headroom is limited .
Industry standards include:
CB/T467-95 (Chinese marine standard)
JIS F7367 (JIS 5K, rising stem)
JIS F7368 (JIS 10K)
DIN 3201
Connection Types
DN50 bronze gate valves are available with multiple connection options including flanged ends, internal threads (G 2, Rp 2), and solder joint connections . Flange bolt circles differ between standards, so compatibility with existing piping systems must be verified before ordering .
Marine Seawater Application Considerations
Shipboard seawater piping systems present unique challenges including continuous saltwater exposure, biofouling, and electrochemical corrosion. Research has shown that bronze valves in seawater pipe systems experience corrosion influenced by pipe material and sacrificial anodes . Bronze gate valves are specifically designed to withstand these conditions and comply with Navy and MIL-SPEC standards for reliability and safety .
Bronze gate valves are typically applied in smaller sizes and auxiliary water systems where compatibility with marine environments is required. Common applications include seawater cooling lines, shipboard freshwater systems, auxiliary engine room systems, and isolation on pumps and manifolds .
Selection Considerations
When specifying a bronze gate valve for marine service, consider the following factors:
Material grade should match the specific seawater conditions, with nickel-aluminum bronze recommended for high-velocity or cavitation-prone service . The valve should be selected for full open or full close service, as gate valves are not suitable for throttling or flow regulation . Regular maintenance includes inspection of seat, bonnet gasket, and stem area . With proper selection and regular lubrication, bronze gate valves typically achieve over ten years of service life in marine applications .
Summary
DN50 bronze gate valves for marine seawater piping represent a reliable corrosion-resistant investment with prices ranging from approximately 188 RMB for tin bronze models to 2000 RMB for premium nickel-aluminum bronze configurations. Selection requires careful evaluation of material grade, pressure rating, connection standard, and operating conditions. For critical marine applications, consulting with qualified valve suppliers who can provide certified material test reports and performance data is strongly recommended to ensure long-term reliability in seawater service.
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