Views: 0 Author: J-VALVES Publish Time: 2025-05-10 Origin: Site
In the fluid control process in the industrial field, J-VALVES DN300 PN40 TRUNNION BALL VALVES are widely used due to their unique structural and performance advantages. However, different design standards result in differences in many aspects of TRUNNION BALL VALVES of this specification. A clear understanding of these differences is crucial for us to make accurate procurement decisions. The following is an in-depth comparison of its common design standards to clear up the confusion for you.
I. OVERVIEW OF COMMON DESIGN STANDARDS
The J-VALVES DN300 PN40 TRUNNION BALL VALVES mainly refer to the standards of the International Organization for Standardization (ISO), Chinese National Standards (GB), and the American Petroleum Institute (API). These three major standards have detailed specifications for the design, manufacturing, performance, and quality inspection of trunnion ball valves from different focuses.
II. COMPARISON OF STRUCTURAL DESIGN
Comparison Items | ISO Standards | GB Standards | API Standards |
Valve Body Structure | Optimized according to mechanics and working conditions, with the wall thickness accurately calculated. Advanced processes are used to ensure a smooth flow passage and good installation adaptability. | Taking both strength and domestic actual situations into account, it is easy to install and maintain, with strict control of dimensional accuracy and good adaptability to domestic equipment. | The structure is heavy and solid, with reinforced structures and high welding requirements, having a strong ability to cope with extreme working conditions. |
Trunnion Design | Focusing on strength and stiffness, with the surface treated for wear and corrosion resistance, a firm connection ensured to guarantee stable operation. | Considering domestic operation habits and costs, it is adapted to domestic tools to ensure durability. | High-performance alloys are selected and processed to improve performance, with strong supporting ability and suitable for harsh environments. |
Ball Design | Having high requirements for roundness and surface finish, using high-quality alloys, with strict control of dimensional accuracy, and smooth and flexible operation. | Optimized in combination with domestic media to prevent wear, with a firm connection and good sealing and operation performance. | Top-notch alloys are adopted, with advanced processes, long-term and reliable sealing, and excellent performance under extreme working conditions. |
III. COMPARISON OF MATERIAL SELECTION
Comparison Items | ISO Standards | GB Standards | API Standards |
Valve Body Materials | Carbon steel, stainless steel, etc. are selected according to international specifications, matched according to working conditions, and subject to strict inspection. | Domestic materials that meet the standards are used, with the procurement and inspection links controlled to meet domestic usage requirements. | There is a tendency to use high-end materials verified in Europe and America, with high requirements for supplier qualifications to ensure high performance. |
Sealing Materials | Commonly used materials such as polytetrafluoroethylene and high-performance rubber are used, with performance indicators defined to ensure the sealing effect. | Materials are selected considering the cost-performance ratio, and their performance is tested. Domestic materials are also used when they meet the requirements. | Special high-performance materials are adopted, which are required to withstand extreme environments and pursue zero leakage. |
IV. COMPARISON OF PERFORMANCE PARAMETER STANDARDS
Comparison Items | ISO Standards | GB Standards | API Standards |
Pressure Ratings | The pressure rating range of DN300 PN40 is divided, parameters are specified, it is adapted to international pipelines, and the pressure resistance is verified by tests. | Graded according to common domestic pressures, tests and acceptance are in line with domestic habits to ensure the coordinated operation of the system. | There are strict requirements for high pressure, with high-pressure test indicators refined to ensure reliable operation under extreme pressure. |
Flow Coefficients | The coefficients under different opening degrees are determined by theory and experiments, providing accurate references for fluid transportation and emphasizing universality. | Referring to international methods and modified in combination with domestic situations, it meets the needs of domestic working conditions and helps optimize the system. | More factors are considered to determine the coefficients, which are applicable to complex industrial systems and provide accurate data. |
Sealing Performance | Measured according to the leakage level, verified by multiple detection means, and meeting the sealing requirements of different working conditions. | The leakage amount is specified according to domestic standards, and the detection methods are practical and accurate to ensure the normal use of domestic projects. | Nearly zero leakage is required, with strict detection specifications, monitored by high-precision equipment to ensure long-term reliable sealing. |
V. PROCUREMENT DECISION SUGGESTIONS
Based on a comprehensive comparison of the characteristics of J-VALVES DN300 PN40 TRUNNION BALL VALVES under different design standards, the following factors need to be fully considered during procurement:
If your project involves international cooperation, export overseas, or follows international general engineering specifications, products conforming to ISO standards perform well in terms of design universality and adaptability to international pipeline systems, which can reduce communication and usage costs.
If the ball valves are mainly applied to domestic industrial projects, products conforming to GB standards have a higher degree of fit with domestic pipeline facilities, engineering environments, and maintenance systems. The procurement cost is relatively more reasonable, and after-sales maintenance is also more convenient.
For those projects applied in high-end European and American industrial fields, such as large petrochemical and offshore platform projects with strict requirements for ball valve performance, products conforming to API standards can better meet the harsh working condition requirements and ensure the safe and stable operation of the system with their excellent quality, high-performance materials, and strict manufacturing processes.
In short, when purchasing J-VALVES DN300 PN40 TRUNNION BALL VALVES, it is necessary to combine various factors such as the actual working conditions, budget, and application environment of your own project, refer to the characteristics of different design standards, and thus make accurate and reasonable procurement decisions to ensure that the selected ball valves can provide reliable fluid control guarantees for industrial pipeline systems.
