The application of valves in different industries
1. Petroleum and petrochemical industry
(1) Refinery unit: mainly uses pipeline valves such as gate valves, globe valves, check valves, safety valves, ball valves, butterfly valves, etc. Among them, the demand for gate valves accounts for about 80% of the total number of valves.
Chemical fiber equipment: mainly uses ball valves, jacket valves (such as jacket ball valves, jacket gate valves, jacket globe valves), etc.
(2) Synthetic ammonia plant: Depending on the raw materials and purification methods, the technical performance of the required valves varies, mainly using gate valves, globe valves, check valves, drain valves, butterfly valves, ball valves, etc.
2. Power industry
(1) Hydroelectric power stations: With the development of large-scale power station construction, large-diameter and high-pressure safety valves, pressure reducing valves, globe valves, gate valves, etc. are required.
(2) Thermal power generation: Valves are widely used to control the flow of liquids or gases.
3. Metallurgical industry
Alumina production: mainly using wear-resistant slurry valves, regulating drain valves, etc.
Steelmaking: mainly uses metal sealed ball valves, butterfly valves, oxidation ball valves, etc.
4. Ocean Engineering
With the development of offshore oil field exploitation, the demand for valves on offshore platforms is gradually increasing.
5. Food and pharmaceutical industry
The industry has high requirements for the hygiene and corrosiveness of valves, mainly using stainless steel ball valves, non-toxic all plastic ball valves, butterfly valves, etc.
6. Construction industry
Valves are widely used in HVAC systems and water supply and drainage systems, mainly using low-pressure valves such as rubber plate valves, balance valves, etc. At present, it is developing towards environmentally friendly and energy-saving directions.
7. Heating industry
In urban heating systems, a large number of metal sealed butterfly valves, horizontal balance valves, etc. are required to solve the problem of hydraulic imbalance in pipelines and achieve the goal of energy conservation and heating balance.
8. Environmental Protection Industry
The water supply system mainly uses centerline butterfly valves, soft sealed gate valves, etc.
9. Aerospace industry
Valves are used to control the flow and pressure of air, fuel, and other liquids.
Safety performance of valves
The safety performance of valves is crucial as it relates to the safe and stable operation of the entire fluid control system. Here are some common valve safety performance requirements:
1. High pressure resistance: Valves need to be able to withstand the working pressure of the system to ensure that they will not leak or be damaged under high pressure.
2. Corrosion resistance: Valves need to have good corrosion resistance to adapt to corrosive environments in different media.
3. High temperature resistance: In high temperature environments, valves need to maintain stable performance and sealing.
4. Wear resistance: The sealing surface and opening and closing components of the valve need to have good wear resistance performance to ensure long-term stable use.
Anti leakage design of valves
The anti leakage design of valves is the key to ensuring the safety of fluid control systems. Here are some common valve leak prevention design measures:
1. Selection of sealing materials: Choose suitable sealing materials based on the characteristics of the medium and working pressure, such as rubber, polytetrafluoroethylene, etc.
2. Design of sealing structure: Adopt reasonable sealing structure design, such as single eccentricity, double eccentricity, triple eccentricity, etc., to improve sealing performance.
3. Metal sealing pair: In high temperature, high pressure, or highly corrosive environments, the use of metal sealing pairs can improve the sealing performance and durability of valves.
4. Safety valve setting: When the system pressure exceeds the set value, the safety valve can automatically open, release pressure, and protect equipment and systems from overpressure damage.
5. Regular maintenance and inspection: Regularly inspect and maintain valves, replace damaged seals and components in a timely manner, and ensure the normal operation and sealing performance of valves.
