TH VALVE • PROFESSIONAL VALVE MANUFACTURER
GET IN TOUCH WITH US
Cell: 0086-185 2639 6136
0086-133 7031 7626
E-mail: tanghai@tanghaivalve.com
info@tanghaivalve.com
Web: www.tanghaivalve.com
Add: East of Guanghui Road, Beizhakou town, Jinnan District, Tianjin, P.R.China.
© Copyright 2020 Tianjin Tanghaidongyang Valve Co., Ltd. All Rights Reserved.
Top Valve Manufacturer, Provide the best solutions for valve projects.
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, […]
Anti-Corrosion Technology for Marine Concentric Butterfly Valves
Body Coating: Epoxy coating, thermal zinc spray, FBE coating. Disc Protection: Stainless steel or copper alloy with surface treatment. Seat Protection: Modified rubber for seawater resistance. Shaft Sealing and Corrosion Prevention: Special coating in shaft sealing chamber + corrosion-resistant O-rings. Tianjin Tanghai Valve Co., Ltd. is a professional marine valve manufacturer, including butterfly valve, check […]
Factors Affecting Sealing Performance of Concentric Soft Seal Butterfly Valves
Key Factors Seat Material Selection: EPDM for seawater, NBR for oil, VITON for high temperature. Machining Precision: Concentricity between valve body, disc, and seat. Installation Position: Horizontal installation is preferred over vertical to avoid self-weight affecting sealing. Torque Control: Excessive or insufficient torque may damage the seat. Key Technical Points Ensure concentricityamong body, disc, and […]
Comparison Between Concentric and Double Offset Marine Butterfly Valves
Item Concentric Butterfly Valve Double Offset Butterfly Valve Structure Disc center aligned with body centerline Disc center offset from body centerline Sealing Type Mainly soft seal Soft+hard seal available Operation Torque Low Slightly higher ApplicationPressure Low to medium pressure(PN6-PN16) High pressure(PN25-PN40) Cost Lower Higher Typical Application General ship pipelines,ballast water systems High-ressure fire system,deck wash system […]
The Processing of Butterfly Valve Fittings
The processing of butterfly valve accessories generally involves multiple steps, with the main goal of ensuring the precision and compatibility of each component. As a common type of regulating valve widely used in industrial pipelines, the processing accuracy of butterfly valve components directly affects the valve’s performance and lifespan. The main components of a butterfly […]
Connection Standard of Dual Plate Check Valve
The connection standard of a Dual Plate Check Valve primarily refers to the standards governing the face-to-face dimensions, flange compatibility, and pressure ratings. These standards ensure that the valve can be installed easily in various pipeline systems with flanged connections. Key Connection Standards for Dual Plate Check Valves: 1. API 594 – Check Valve Face-to-Face and End Connection […]
Butterfly Valve Connection Standard
Butterfly valves are widely used in industrial applications for regulating flow and are manufactured according to several connection standards. These standards ensure compatibility, safety, and reliability. Below are the common connection standards for butterfly valves: 1. Flanged Connections Butterfly valves with flanged ends are designed to mate with standard pipe flanges. The key standards for […]
The Valve Disc Material of Concentric Type Butterfly Valve
The common valve disc materials for middle-line butterfly valves are as follows, with each material suitable for different working environments and media: Ductile Iron: Known for its good strength, toughness, and impact resistance, ductile iron is commonly used in general industrial applications involving media such as water and gas. It is cost-effective, but its corrosion […]
Electroplating of Single Plate Check Valves
Electroplating is a surface treatment process for single-plate check valves that aims to enhance their corrosion resistance, wear resistance, and aesthetic appeal. This process is particularly suited for valves operating in corrosive environments for extended periods. Below is an overview of the electroplating process and key considerations for single-plate check valves: Common Electroplating Types Zinc […]