Views: 0 Author: J-VALVES Publish Time: 2025-05-10 Origin: Site
In the field of industrial fluid control, WAFER-TYPE BUTTERFLY VALVES play a crucial role, and different design standards often determine their quality and performance. As a brand that has attracted much attention in the industry, J-VALVES' products follow a variety of design standards. Now, let's compare these design standards in detail to help you gain an in-depth understanding of the key factors behind quality assurance.
I. MAIN DESIGN STANDARDS INVOLVED
Currently, the commonly referred design standards for J-VALVES WAFER-TYPE BUTTERFLY VALVES include international standards (such as ISO standards), domestic industry standards (taking GB standards as an example), and some commonly used European and American standards (such as API standards, etc.). The following is a comparative analysis.
II. COMPARISON IN STRUCTURAL DESIGN
Comparison Items | ISO Standards | GB Standards | API Standards |
Valve Body Structure | Compact in weight, with reasonable wall thickness to ensure stable strength. It is manufactured by casting, with defects controlled to ensure a smooth flow passage. | Adapted to domestic working conditions, taking both strength and cost into account. The casting is controlled according to the domestic system, and the dimensions are standardized for easy installation and maintenance. | Oriented towards high pressure and large capacity, with a heavy structure and many reinforced parts. Welding and corrosion resistance are carefully considered. |
Disc Design | The shape is optimized to ensure uniform stress. Materials are selected to balance strength and toughness, and surface finish is emphasized to ensure sealing. | Improved in combination with domestic media, specifying the firm connection between the disc and the valve stem. | High-strength alloys are used for special working conditions. Thickness and other factors are calculated to ensure stability in complex environments, with emphasis on long-term sealing, corrosion resistance. |
Valve Stem Design | Required to have sufficient strength and stiffness, with the surface being wear and corrosion resistant (such as chrome plating). The dimensions of connection parts are precise to prevent leakage and jamming. | Starting from domestic operation and maintenance, the specifications fit the usage requirements, emphasizing the cost-performance ratio of materials. | In high-pressure scenarios, there is a large margin of strength. Heat treatment is used to improve performance. The connection structure is designed to prevent loosening and leakage, ensuring long-term reliability. |
III. COMPARISON OF MATERIAL SELECTION STANDARDS
Comparison Items | ISO Standards | GB Standards | API Standards |
Valve Body Materials | Based on temperature, pressure, and medium corrosiveness, metal materials that comply with international specifications (such as 304, 316 stainless steel, carbon steel, etc.) are selected, and the detection methods are clear. | Based on domestic material resources, common materials and domestic corrosion-resistant alloys are selected. Procurement and inspection are carried out according to the domestic quality system to ensure quality. | For special environments (such as marine, high-corrosion chemical environments), high-performance materials verified in Europe and America are used, and the qualifications of suppliers are strictly reviewed to ensure the quality of the source. |
Sealing Materials | Elastic, temperature-resistant and corrosion-resistant rubbers (such as EPDM, fluoroelastomer, etc.) and polytetrafluoroethylene are used, with relevant indicators strictly defined. | Considering both cost and performance, in addition to commonly used materials, new domestic substitute materials are developed, and various performance parameters are strictly tested. | Emphasizing the long-term performance in extreme working conditions, high-end sealing materials (such as special fluoroelastomer formulations) are researched and selected to meet high sealing requirements. |
IV. COMPARISON OF PERFORMANCE PARAMETER STANDARDS
Comparison Items | ISO Standards | GB Standards | API Standards |
Pressure Ratings | Divided into multiple grades, and each grade has a clear range of pressure and test pressure, facilitating global users to select according to working conditions. | Graded according to common pressure scenarios in China, with good compatibility with domestic pipelines. Tests and acceptance are in line with actual operations. | Focusing on high pressure and ultra-high pressure in large European and American installations, the performance assessment under ultra-high pressure is stricter, with harsh requirements for pressure holding and pressure fluctuation. |
Flow Coefficients | Determined by scientific methods and formulas, providing accurate references for fluid system design, focusing on the accuracy under different specifications and opening degrees. | Referring to general methods and modified and improved in combination with domestic flow characteristics, which is beneficial to the optimal design of domestic systems. | Combined with large-scale and complex working conditions, more factors are considered, applicable to high-end and complex fluid systems. |
Sealing Performance | Measured according to strict leakage level standards. Different levels correspond to different scenarios, and various test methods are used for detection and verification. | According to the domestic grading standards, the allowable leakage amounts in different situations are clearly defined, and the detection methods emphasize operation and accuracy. | For applications involving hazardous media, nearly zero leakage is required. Tests are carried out according to advanced specifications, and high-precision equipment is used for monitoring. |
V. SIGNIFICANCE OF QUALITY ASSURANCE AND PURCHASE SUGGESTIONS
From the above comparison of different design standards for J-VALVES WAFER-TYPE BUTTERFLY VALVES, it can be seen that each standard has its own emphasis and advantages.
For users, if the project involves international cooperation or export overseas, products following ISO standards can better conform to international general specifications, reducing obstacles in installation, use, and acceptance. If the products are mainly applied to domestic industrial projects, products conforming to GB standards have a higher degree of fit with the domestic engineering environment, supporting facilities, etc., and the procurement cost and after-sales maintenance are relatively more convenient. In some high-end European and American industrial fields with extremely high requirements for valve performance, products conforming to API standards can better handle difficult tasks with their excellent quality and performance.
In short, when purchasing J-VALVES WAFER-TYPE BUTTERFLY VALVES, it is necessary to fully understand the actual needs of your own project, including working conditions, medium characteristics, budget range, etc., and comprehensively compare the characteristics of products under different design standards. Only in this way can you select high-quality valve products that can truly ensure quality and meet usage requirements, providing reliable guarantees for the industrial fluid control process.
