1. Design standards
The design of marine valves must comply with various international and national specific standards, such as GB, CB, JB, Japanese JIS, American API, German DIN, etc. These standards cover all aspects from material selection to manufacturing processes, ensuring product quality and reliability.
According to specific application scenarios, different standards can be selected to guide the design and manufacturing of valves. For example, in China, there may be more reference to GB (national standards) or CB (shipbuilding industry standards); In the international market, it may be necessary to follow API or DIN standards.
2. Classification criteria
According to their usage, marine valves can be divided into various types such as gate valves, globe valves, butterfly valves, ball valves, etc. Each type of valve has its specific function and applicable situation.
According to the structural characteristics, it can be further divided into straight through, DC, angle, and plunger globe valves. Among them, DC and angle globe valves have lower pressure losses due to their smaller changes in fluid flow direction.
3. Material requirements
The valve body is usually made of materials such as cast steel, brass, or pig iron to ensure sufficient strength and corrosion resistance.
For seals, high-performance materials such as flexible graphite, stainless steel, PTFE, etc. are often used to ensure good sealing effect and extend service life.
4. Technical parameters
The nominal pressure level determines the similarity in shape and specifications of gate valves with the same diameter, making it easier to choose and match during construction and installation.
In addition, the influence of factors such as operating temperature range and medium characteristics on valve selection also needs to be considered.
5. Quality control
During the design process, attention should be paid to resource conservation and environmental protection, while also taking into account effective control of maintenance costs in the later stages.
The introduction of advanced technical means such as Internet, 5G communication, big data analysis, etc. will help improve the intelligence level and service quality of the whole system.
In summary, the design of marine valves not only needs to meet basic functional requirements, but also must strictly comply with relevant technical specifications, and comprehensively consider multiple requirements such as economy, environmental protection, and maintainability. Only through reasonable planning and implementation can we truly achieve the goals of efficient, safe, and sustainable development.
