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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 […]
Corrosion Prevention Methods for WCB Material Valve Bodies in Marine Valves
WCB material (carbon steel castings) is prone to corrosion in certain environments, especially in marine applications. To enhance the service life of WCB valves, effective corrosion prevention methods are necessary. Here are some common approaches: 1. Cathodic Protection Principle:Install sacrificial anodes (e.g., zinc or magnesium blocks) on the valve body to protect it from corrosion […]
Corrosion Resistance of Marine Butterfly Valves
The corrosion resistance of marine butterfly valves is a critical factor in their selection and application, especially in marine environments. Due to the presence of salt spray, high humidity, and seawater’s corrosive nature, marine equipment requires superior corrosion-resistant properties. Below are key aspects related to the corrosion resistance of marine butterfly valves: 1. Material Selection […]