China Shanghai Jianggong Valve Manufacturing Co., Ltd. Company News

Forged steel valve and Cast Steel valve products differrence   Forged steel valves and cast steel valves are two common types of industrial valves, which have significant differences in manufacturing processes, material properties, scope of use, price, and applicable scenarios. Here are their main differences:   1. Manufacturing process: Forged steel valves are manufactured by heating the metal to the deformation temperature and then forging it. This process rearranges and strengthens the metal grains, thereby improving the performance of the material. Cast steel valves are manufactured by melting, pouring, and cooling, with a relatively simple process.   2. Material properties: The structure of forged steel valves is more uniform, with finer grains, thus possessing better toughness and impact resistance. This characteristic makes forged steel valves more stable and reliable when subjected to pressure, impact, and vibration. The structure of cast steel valves is relatively dense, with high strength and hardness, but relatively low toughness.   3. Scope of use: Forged steel valves are suitable for high temperature and high pressure, small-diameter valves, and industrial fields with high requirements, such as petroleum, chemical, metallurgy, etc. Cast steel valves are suitable for large and medium-sized valves with lower temperature and its working temperature not exceeding 425 ℃.   4. Price: Forged steel valves are relatively expensive due to their complex manufacturing process and superior material properties. Cast steel valves are more competitive in some situations where cost control is required due to their relatively simple manufacturing process and lower cost.   5. Applicable scenarios: Forged steel valves are commonly used in critical equipment or high-pressure fluid control systems due to their excellent performance. Cast steel valves are suitable for producing complex shaped parts due to their good fluidity and formability.   The selection of suitable valve materials needs to be judged based on specific usage requirements. In practical applications, the appropriate valve type should be selected based on specific needs and scenarios. For example, in situations where high strength and toughness are required, such as high-pressure fluid control or critical equipment, forged steel valves may be a better choice; When it comes to producing parts with complex shapes and good fluidity, cast steel valves have more advantages.

The difference between safety valve and pressure reducing valve   We often wonder about the functional differences between pressure reducing valves and safety valves. Acctually, both of them can regulate pipeline pressure, but the differences are very significant. Therefore, they must be used correctly to ensure the safety of pipelines and equipment. The main differences between safety valves and pressure reducing valves lie in their functional purpose, working principle, working state, application scenarios, structural types, installation requirements, and maintenance and inspection. ‌   1. Functional purpose: Safety valves are mainly used for overpressure protection to prevent equipment damage due to excessive pressure; The pressure reducing valve is used to reduce pressure and maintain stable outlet pressure.   2. Working principle: The safety valve releases pressure by opening and closing the valve disc, usually opening when the pressure exceeds the set value; The pressure reducing valve adjusts the pressure by changing the throttling area and is usually in an open state, working continuously. 3. Working state: The safety valve is usually in the closed state and only opens when the pressure exceeds the set value; The pressure reducing valve is usually in the open state and continues to work.   4. Application scenario: Safety valves are suitable for equipment that requires overpressure protection, such as boilers, pressure vessels, compressors, etc; Pressure reducing valves are suitable for systems that require stable pressure output, such as residential water supply, industrial process control, etc. 5. Structural types: Safety valves include spring type, lever type, and pulse type, etc; Pressure reducing valves come in diaphragm, spring, and piston types. 6. Installation requirements: Safety valves usually need to be installed vertically and have unobstructed outlets; Pressure reducing valves usually need to be installed horizontally and ensure no resistance downstream. 7. Maintenance and Inspection: Safety valves require regular pressure testing and sealing checks to ensure they can function properly in emergency situations; Pressure reducing valves require regular inspection and maintenance to ensure the accuracy of pressure regulation.

The correct position and importance of ball valve installation   The installation position of ball valves should be determined according to specific application scenarios, taking into account factors such as ease of operation, safety, fluid flow direction, and pipeline layout. The correct installation position can ensure the optimal performance of the ball valve and guarantee the normal operation of the pipeline system.   Ball valves, as a commonly used fluid control device, are widely used in industrial production, domestic water, heating systems, and other fields. The correct selection of the installation position for ball valves not only affects the effectiveness of their use, but also has a crucial impact on the stability and safety of the entire pipeline system.   1. Consider the convenience of operation When installing a ball valve, the first consideration is the ease of operation. Generally speaking, ball valves should be installed in a location that is easy for operators to observe and operate. For example, there should be sufficient space next to the valve for operators to perform switch operations, inspections, and maintenance. At the same time, the operating handle or actuator of the ball valve should be located in a convenient position to avoid difficulties in operation due to space limitations.   2. Ensure safety Safety is an important consideration when choosing the installation location for ball valves. Ball valves should be installed in locations that are not affected by mechanical damage, chemical corrosion, or high temperatures to prevent damage or performance degradation due to environmental factors. In addition, the installation position of the ball valve should also comply with safety regulations, such as avoiding installation in places that are easily impacted or frequently passed by personnel to prevent accidents from occurring.   3. Consider fluid flow direction and pipeline layout The installation position of ball valves also needs to consider fluid flow direction and pipeline layout. Generally speaking, ball valves should be installed on horizontal pipelines to facilitate smooth fluid flow. In special circumstances, if it is necessary to install on a vertical pipeline, it should be ensured that the ball valve can withstand fluid pressure to prevent damage to the ball valve due to fluid impact. In addition, the installation position of ball valves should be coordinated with the pipeline layout, minimizing the use of bends, joints, and other parts of the pipeline that are prone to fluid resistance, in order to improve the operational efficiency of the pipeline system.     In summary, the selection of the installation location for ball valves requires comprehensive consideration of factors such as ease of operation, safety, fluid flow direction, and pipeline layout. The correct installation position can ensure the optimal performance of the ball valve and guarantee the normal operation of the pipeline system. In practical applications, we should flexibly choose the installation position of ball valves according to specific situations to ensure the safe, stable, and economical operation of pipeline systems.  

The correct installation can ensure the optimal performance of the ball valve and guarantee the normal operation of the pipeline system, below points must be noted during operation:     ***Preparation before installation of ball valve:     1. The front and rear pipelines should be coaxial, and the sealing surfaces of the two flanges should be parallel. The pipeline should be able to withstand the weight of the ball valve, otherwise appropriate support must be provided on the pipeline. 2. Blow clean the pipelines before and after the valve, remove oil stains, welding slag, and all other impurities from the pipeline. 3. Check the markings of the ball valve to ensure that it is intact and undamaged. Fully open and close the valve several times to confirm its normal operation. 4. Remove the protective components from the connecting flanges at both ends of the ball valve.   5. Check the valve hole to remove any possible dirt, and then clean the valve hole. Even small particles of foreign matter between the valve seat and the ball may damage the sealing surface of the valve seat.     ***Ball valve installation:   1. Install the ball valve onto the pipeline, and any end of the ball valve can be installed on the upstream end. The ball valve driven by a handle can be installed at any position on the pipeline. But with a gearbox or pneumatic ball valve, it should be installed upright, that is, installed on a horizontal pipeline, and the driving device should be above the pipeline.   2. Install a sealing gasket between the valve flange and the pipeline flange according to the pipeline design requirements.   3. The bolts on the flange need to be tightened symmetrically, gradually, and evenly. 4. Connect pneumatic pipelines (when using pneumatic actuators).     ***The use of ball valves:     1. It is necessary to confirm that the pressure in the upstream and downstream pipelines of the ball valve has been relieved before proceeding with disassembly and assembly operations. 2. Non metallic parts should be immediately removed from the cleaning agent after cleaning and should not be soaked for a long time. 3. The bolts on the flange must be tightened symmetrically, gradually, and evenly during assembly. 4. The cleaning agent should be compatible with the rubber parts, plastic parts, metal parts, and working media (such as gas) in the ball valve. When the working medium is gas, gasoline (GB484-89) can be used to clean metal parts. Non metallic parts should be cleaned with purified water or alcohol. 5. Each individual ball valve component that has been disassembled can be cleaned by immersion washing. Metal parts that have not yet decomposed can be cleaned with a clean and fine silk cloth soaked in cleaning agent (to prevent fibers from falling off and adhering to the parts). During cleaning, all grease, dirt, adhesive buildup, dust, and other substances adhering to the wall surface must be removed. 6. When disassembling and reassembling ball valves, care must be taken to prevent damage to the sealing surfaces of the parts, especially non-metallic parts. Special tools should be used when removing the O-ring. 7. After cleaning, it is necessary to wait for the wall cleaning agent to evaporate (which can be wiped with a silk cloth that has not been soaked in cleaning agent) before assembly, but it should not be left for a long time, otherwise it will rust and be contaminated by dust. 8. New parts also need to be cleaned thoroughly before assembly. 9. Lubricate with grease. Lubricating grease should be compatible with the metal material, rubber parts, plastic parts, and working medium of the ball valve. When the working medium is gas, special 221 lubricating grease can be used, for example. Apply a thin layer of grease on the surface of the seal installation groove, a thin layer of grease on the rubber seal, and a thin layer of grease on the sealing and friction surfaces of the valve stem.

  How to choose electric and pneumatic gate valves The main differences between electric gate valves and pneumatic gate valves lie in the power source, control mode, response speed, and ease of maintenance and repair. ‌ 1. Power source: The electric gate valve uses an electric motor as the power source, which drives the opening and closing of the valve through the electric motor; The pneumatic gate valve is driven by the air pressure provided by the air source to open and close the valve. ‌ 2. Control method: Electric gate valves can be remotely and automatically controlled by electrical signals to control the opening and closing of the valve; Pneumatic gate valves generally require pneumatic and manual devices to control the opening and closing of the valve, and the control method is relatively simple. ‌   3. Response speed: Electric gate valves have a relatively fast response speed and can achieve fast opening and closing; The response speed of pneumatic gate valves is relatively slow and the opening and closing time is long. ‌   4. Maintenance and repair: Electric gate valves generally require motor maintenance and overhaul, which is relatively difficult to maintain; Pneumatic gate valves generally only require maintenance and overhaul of pneumatic components, making maintenance relatively simple. ‌   Overall, electric gate valves are suitable for applications that require remote and automated control, with a fast response speed; Pneumatic gate valves are suitable for general control applications and are relatively easy to maintain. These two types of valves each have their own advantages, and the choice of valve depends on the specific application requirements and working environment. ‌

The characteristics and application prospects of API butterfly valve   API butterfly valve is a kind of high performance butterfly valve and designed with API 609 standard, it adopts three-dimensional eccentric oblique cone valve seat seal, butterfly disc sealing adopts new type metal embedded put on the butterfly plate and valve seat, using disc rotating pressure tight seal, so the sealing surface friction small, so the closer the butterfly valve level is, the tighter it becomes, and sealing performance reliable, open to ensure sealing completely out of contact, to ensure the sealing surface is not damaged, and its connection ways including wafer, flange and lug types, its features as following,   1. Lightweight and easy to operate, easy to install: The design of the three eccentric butterfly valve makes it a lightweight and easy to operate valve, which simplifies the installation process, reduces the required pipeline support, and also makes it easy to replace the valve seat ring. ‌ 2. Low torque and bidirectional sealing function: Due to its low torque characteristics, the three eccentric butterfly valve does not require the use of larger valves, thereby significantly saving costs. In addition, both ends achieve zero leakage and have bidirectional sealing function, which is not limited by the flow direction and spatial position of the medium, and can be installed in any direction. ‌ 3. Excellent cutting performance and durability: The design of the three eccentric butterfly valve has excellent cutting performance and durability, with small size, light weight, good sealing performance and corrosion resistance, and long service life. ‌   The application prospects of triple eccentric butterfly valves are very broad, mainly used in industrial pipelines such as metallurgy, power, petrochemicals, water supply and drainage, and municipal construction, as a means of regulating flow and cutting off fluids. In addition, due to its excellent performance, the three eccentric butterfly valve is also suitable for fields such as heat, energy, and light industry, with advantages such as small size, light weight, economic practicality, and easy maintenance. ‌   In summary, the three eccentric butterfly valve occupies an important position in the industrial field due to its unique design and excellent performance, and has a wide range of application prospects.  

What is the development trend of electric control valves The development trends of electric control valves include high performance and reliability, intelligence and networking, energy conservation and environmental protection and low-carbon economy, personalization and customization. ‌ With the acceleration of industrialization and the improvement of industrial automation level, the market size of electric control valves will continue to expand, and the competitive landscape will become increasingly fierce. Technological innovation becomes crucial, and industry integration and restructuring will inevitably occur. Early electric control valves were mainly used for fluid control in industrial production, achieving the adjustment of parameters such as medium flow rate, pressure, and temperature through electric actuators. Although they improved production efficiency to a certain extent, there were still problems such as inconvenient operation and low control accuracy. With the continuous progress of technology, intelligent electric control valves are gradually moving towards the intelligent stage, adding intelligent control systems and diversified functional modules. Real time monitoring of medium flow, pressure, temperature and other parameters is achieved through built-in sensors, and intelligent algorithms are used for analysis and processing to achieve precise control of medium flow. At the same time, the intelligent electric control valve also has functions such as remote monitoring, fault diagnosis, and automatic alarm, greatly improving the intelligence and automation level of the valve, reducing the frequency of manual intervention, and improving production efficiency and safety. ‌ In the future, with the continuous development and application of technologies such as artificial intelligence, big data, and cloud computing, intelligent electric control valves will usher in a broader development space. Intelligent electric control valves will pay more attention to interconnectivity with other equipment and systems, achieving deep integration of intelligent technology. By connecting with industrial IoT platforms, real-time monitoring and control of the entire production process can be achieved, thereby achieving intelligent management of the production process. At the same time, intelligent electric control valves will also pay more attention to energy-saving, emission reduction, and environmental protection functions. By optimizing control algorithms and equipment structure design, precise control of medium flow and pressure will be achieved, reducing energy consumption and emissions, and achieving green production.