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2024-09-30

How to operate and maintain the valve during operation

During the operation of valves, operation and maintenance are key links to ensure the normal operation of valves, extend their service life, and prevent faults from occurring. The following elaborates on the key points of operation and maintenance during valve operation from the aspects of daily inspection, regular maintenance, fault handling, and operating standards: 1、 Daily inspection 1. Appearance inspection • Inspection content: Check the appearance of the valve body, connection parts, actuator, etc. for any signs of damage, deformation, or leakage. Check whether there is corrosion or cracks on the surface of the valve body, whether the connecting flanges are loose, and whether the bolts are complete and tightened. Meaning: Timely detection of potential problems outside the valve to prevent the problem from escalating.

2024-09-30

The difference between eccentric hemispherical valve and fixed ball valve

There are significant differences between eccentric hemispherical valves and fixed ball valves in terms of structural design, sealing performance, application scenarios, and operational characteristics. The following is a specific comparative analysis of the two: 1、 Structural Design 1. Eccentric hemispherical valve: The eccentric hemisphere valve adopts an eccentric design, and there is an eccentricity between the valve shaft and the centerline of the hemisphere. This design ensures that the contact between the ball core and the valve seat only exists at the moment of closing and opening the valve, thereby reducing the wear of the valve core and valve seat. The spherical surface of an eccentric hemispherical valve usually does not have a V-shaped opening, and its sealing surface design focuses on achieving tight cutting. 2. Fixed ball valve: The ball of a fixed ball valve is supported and fixed by upper and lower valve stems, and can only rotate without horizontal movement. It usually

2024-09-30

How to test the pressure of various industrial valves? The method is here!

Detailed explanation of pressure testing methods for various industrial valves The pressure testing of industrial valves is a crucial step in ensuring their performance and safety. Different types of valves require targeted pressure testing methods due to structural differences. The following provides a complete pressure testing operation guide based on general principles and specific valve types: 1、 General principle of pressure testing 1. Scope of application New valves usually only undergo sealing tests, but repaired or corroded valve bodies/covers require strength tests. The safety valve needs to undergo constant pressure and reseating pressure tests according to the instructions and specifications.

2024-09-30

What should I do if the pneumatic actuator of the pneumatic valve heats up?

Reason: Insufficient pressure or flow rate of the air source may result in poor movement of internal components of the actuator, leading to excessive heat generation. Solution: Check if the air source pressure is sufficient and if the flow rate meets the requirements. If there are any issues, consider increasing the size of the actuator or providing appropriate lubrication to improve the working conditions of the actuator. 2、 Internal component failure of actuator

2024-09-30

Installation environment and maintenance precautions for pneumatic butterfly valves

Pneumatic butterfly valves, as a widely used valve in industrial fluid control systems, have a significant impact on the normal operation and service life of the valve due to their installation environment and maintenance precautions. The following is a detailed explanation:

2024-09-30

What factors affect the practical application of fully welded ball valves?

Fully welded ball valves are affected by various factors in practical applications, which directly affect the performance, service life, and safety of the ball valve. Here are some of the main influencing factors: 1. Medium conditions Medium temperature: The medium temperature for fully welded ball valves is generally between -20 ℃ and 150 ℃. Exceeding this range may affect the sealing performance and material stability of the ball valve. Medium composition: If the medium contains hard particles, crystals, impurities, etc., it is easy to wear out the fluorine lining or PTFE bellows of the valve core and seat during the opening and closing process, resulting in leakage.

2024-09-30

The application of stainless steel valves in the industry

Stainless steel valves refer to valves with stainless steel as the valve body material. Due to their excellent rust resistance and corrosion resistance, they are widely used in multiple industries, as follows: I. Food Industry Stainless steel valves are widely used in the production lines of the food industry, such as those for biscuits, instant noodles and rice noodles, as well as in the dehydration production line equipment for frozen foods. These valves can ensure hygiene and safety during the food production process, while meeting the control requirements for fluid flow and pressure. Ii. Petroleum and chemical Industry In the petroleum and chemical industries, stainless steel valves are widely used due to their excellent corrosion resistance. They can resist the erosion of various corrosive media, ensuring the stability and safety of the production process. In addition, stainless steel valves can precisely control fluid flow, meeting various demands in the production process.

2024-09-30

What are the simple reasons for the heating of valve electric actuators? How to solve it?

Overheating of valve electric actuators is a common fault phenomenon, which may affect equipment performance, shorten service life and even cause safety accidents. The following are the simple causes of fever and the corresponding solutions I. Common Causes of Fever 1. Motor overload • Causes: Valve jamming, excessive load (such as valve torque exceeding actuator rated value), transmission component jamming (such as lack of oil in the gearbox). • Phenomenon: The motor temperature rises sharply, accompanied by an abnormal increase in current. 2. Power supply issue • Causes: Excessively high or low voltage (deviating from the rated value by more than ±10%), three-phase imbalance (phase-to-phase voltage difference > 5%). • Phenomenon: The motor operates unstably and the heating is uneven. 3. Poor heat dissipation • Reasons: Poor ventilation at the actuator installation location (such as in a closed cabinet), dust accumulation on the heat sink

2024-09-30

Design and structural characteristics of forged steel gate valve

The design and structural characteristics of forged steel gate valves are mainly reflected in the following aspects: Design Features 1. Application and medium adaptability: Forged steel gate valves are mainly used to cut off or connect media in pipelines, suitable for the working pressure range of Class 150~2500, as well as the working temperature range of -29~425 ℃ (carbon steel) or -29~500 ℃ (stainless steel). Different materials can be selected to adapt to various media such as water, steam, oil, acetic acid, oxidizing media, urea, etc. 2. Sealing performance: The sealing surface of forged steel gate valves is less susceptible to erosion and erosion by the medium, with good sealing performance and long service life. When fully opened, the sealing surface is less eroded, ensuring good sealing effect. 3. Fluid resistance: The internal medium channel of the forged steel gate valve body is straight through, and the flow direction of the medium through the gate valve does not change, so the fluid resistance is small.