Bent valve stems are generally common in gate valve failures. Of course, ball valves and globe valves may also occur. The main cause of valve stem bending is stress. The main source of stress is that the valve stays in the same state for a long time without movement, so that the valve stem is squeezed by the upward…
Connect the valve and the rubber soft connection naturally. When connecting, ensure that the output shaft of the rubber soft connection is consistent with the input shaft of the valve, and the outer flanges of the two are parallel. If the concentricity is inconsistent, it will cause the valve shaft to break or the rubber soft connection to wear….
1.General purpose Valve: A general name for a versatile valve, also known as a common valve. It is not a valve for a particular condition or purpose.Although there is no clear definition of the universal valve, but mainly refers to the pressure is less than 2MPa, manually operated globe valve, gate valve, check valve, butterfly valve and ball valve,…
Valves are the most common equipment in chemical companies. It seems easy to install valves, but if you do not follow the relevant technology, it will cause safety accidents. Today, Mr. Liu will share with you some experience and knowledge about valve installation. Taboo 1 During winter construction, water pressure test is carried out under negative temperature. Consequence: As…
Why should the outlet valve be closed when the centrifugal pump is started? When the centrifugal water pump is started, there is still no water in the outlet pipe of the pump, so there is no pipe resistance and resistance to lifting height. After the centrifugal pump is started, the head of the centrifugal pump is very low and…
1. Overview of electric gate valve: Electric gate valve is suitable for pipelines in various working conditions such as petroleum, chemical, thermal power plants, etc., to cut off or connect pipeline media. By selecting different materials, the applicable medium is: water, oil, steam, weak acid and alkali solution. The gate valve has simple structure, convenient operation, good performance and…
Valves are often used accessories in pumps and other equipment, including gate valves, butterfly valves, ball valves, stop valves, safety valves, etc. Today, Hebei Hengsheng Pump Industry will talk to you about the selection, use and maintenance of valves. A suitable valve can be well adapted to working conditions and achieve a multiplier effect, so how to choose a…
Quality achieves excellence, and high quality builds a brand. Without excellent quality, it is difficult for an enterprise to progress and develop. Since its establishment, Aiwo Valve has always regarded the pursuit of excellent quality as an opportunity for its own development. Butterfly valve is one of many valve varieties, but it plays an irreplaceable role in pipeline engineering….
1. According to the type of power source According to the type of power source, it can be divided into four types: manual, pneumatic, hydraulic (driven by oil pressure or water pressure) and electric (driven by electromagnetic or electric motor). In recent years, with the development of long-distance oil and gas pipeline technology, the application of gas-liquid linkage, electro-hydraulic…
A valve is a device used to control the direction, pressure, and flow of fluid in a fluid system. During the construction process, the quality of valve installation directly affects the normal operation in the future, so attention must be paid. How did the three-barrel oil workers install the valves? What are the main points, taboos and precautions for…
How to connect double flange limit expansion joint and valve pipeline The double-flange limit expansion joint is composed of main components such as the main body, sealing ring, gland, and short expansion pipe. On the basis of the original performance of the loose sleeve expansion joint, a limit device is added, and a double nut is used to lock…
Before the installation and application of the retractor, you need to check the specific specifications and model specifications. Some pipes are quite different. If they cannot be matched, it will cause a lot of difficulties in the process of application. We are choosing In the whole process, a reasonable plan must be designed in accordance with the corresponding requirements…
