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Installation Locations of Concentric Butterfly Valves in Marine Applications
Concentric butterfly valves, also known as centerline butterfly valves, are widely used in marine piping systems due to their compact structure, light weight, quick operation, cost efficiency, and adaptability to various media. Below are the typical installation positions and application systems on ships: Common Installation Locations & Applications Ballast Water System Installed between ballast tanks […]
Difference Between Low Temperature Valves and Normal Temperature Valves in Marine Applications
In marine valve applications, low temperature valves and normal temperature valves are designed for different working conditions. Their main differences are as follows: Operating Temperature Range normal temperature valves are designed for media with temperatures ≥ -29°C (e.g. seawater, freshwater, fuel oil, compressed air). Low temperature valves are designed for extremely low temperatures ≤ -29°C, such as -46°C, -101°C, -196°C, used for LNG, LPG, liquid […]
Installation Position and Function of Marine Butterfly Valves on Ships
A marine butterfly valve is a common type of ship valve, widely used in various piping systems onboard. Below are its installation positions and functions on a ship: Installation Positions of Marine Butterfly Valves Butterfly valves are mainly used in locations where the pipe diameter is large, quick opening/closing is required, and installation space is limited. They […]
LRS Certificates in Marine Butterfly Valve
LRS Certificates in the context of marine butterfly valves refer to certifications issued by Lloyd’s Register of Shipping (LRS), a well-known maritime classification society. These certificates verify that the valves meet the standards required for marine applications, particularly for safety, reliability, and regulatory compliance. What Is an LRS Certificate? An LRS Certificate demonstrates that a product—like a butterfly […]
ABS Certification in Marine Butterfly Valves
In the field of marine butterfly valves, ABS certification is a crucial qualification for entering the international shipbuilding and offshore markets. Here’s a detailed overview of how ABS certification applies to marine butterfly valves: 1. What is ABS Certification? ABS (American Bureau of Shipping) is a globally recognized classification society that sets technical standards for the design, […]
DNV Certification in Marine Butterfly Valves
DNV certification plays a vital role in marine butterfly valves, signifying that the product complies with the standards set by Det Norske Veritas (DNV, formerly DNV-GL). It is a key requirement for entering the international shipbuilding and offshore engineering markets. 1. What is DNV Certification? DNV (Det Norske Veritas) is a world-leading classification society and risk […]
Application of 2205 and 2507 in Marine Valves
2205 and 2507 are two types of duplex stainless steel that are widely used in marine valves (such as butterfly valves, gate valves, and check valves), particularly in environments where excellent corrosion resistance is required. Below is a comparison of their applications and key characteristics in marine valve usage: I. Comparison of Basic Material Properties […]
SS316 Wafer Type Single Disc Check Valve
Reliable Backflow Protection – Built for Harsh Marine and Industrial Environments Product Overview Our SS316 Single Disc Check Valve is designed for high-performance backflow prevention in demanding environments such as marine systems, chemical plants, and water treatment facilities. Made from 316 stainless steel, it offers exceptional resistance to corrosion, even in seawater and aggressive media. […]
Selection Standard and Application Analysis for Marine Valve
Choosing the right valves for marine systems is crucial to ensure safety, reliability, and long-term performance in harsh offshore environments. Key selection criteria include: 1.1 Material Selection Preferred Material: SS316, Duplex Stainless Steel, Bronze Reason: High corrosion resistance in seawater, brine, and aggressive chemicals Tip: Avoid carbon steel for exposed or submerged applications 1.2 Valve […]
Common Faults and Maintenance of concentric Marine Butterfly Valves
Fault Cause Analysis Solution Leakage Seat aging or wear Replace seat Difficult operation Shaft rust or jamming Clean,lubricate,or replace shaft Corrosion perforation Inadequate corrosion protection Repair by welding or replace valve Handle damage Over-torque operation Replace handle and add torque limiter Tianjin Tanghai Valve Co., Ltd. is a professional marine valve manufacturer, including butterfly valve, […]