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Check category

2022-05-27 16:19:04

Special equipment regular inspection table

China's safety supervision of special equipment there are 8 kinds of ▲ three types of equipment under pressure, namely, boilers, pressure vessels (including gas cylinders), pressure pipelines. ▲ electromechanical category of five kinds, namely, elevators, lifting machinery, passenger ropeways, amusement facilities, field (factory) motor vehicles. Among them, the elevator, refers to the power drive, the use of boxes running along the rigid guide rails or along the fixed line running steps (treads) for lifting or parallel transport of people, goods, electromechanical equipment, including people (cargo) elevators, escalators, moving walkways, etc..
Special equipment regular inspection table

2022-05-27 16:06:40

Valve Knowledge summary

Valves are divided into gate valves, butterfly valves, globe valves, low pressure valves, high pressure valves, safety valves, pressure relief valves, filters, anti-corrosion valves, check valves, pressure reducing valves, ceramic valves, overflow valves, high temperature valves, low temperature valves, etc.   I. Classification   By power   Automatic valves: valves that rely on the medium's own force for action. Such as check valves, pressure reducing valves, traps, safety valves, etc.   Driven valve: rely on human power, electricity, hydraulic, pneumatic and other external forces to manipulate the valve. Such as globe valves, throttle valves, gate valves, disc valves, ball valves, plug valves, etc.
Valve Knowledge summary

2022-05-27 15:37:57

Common valve installation knowledge

 ①Check carefully whether the valve model and specification meet the requirements of the drawings.   ②Check whether the valve stem and valve flap are flexible and free from jamming and skewing.   ③Check whether the valve is damaged and whether the thread of the threaded valve is correct and intact.   ④Check whether the combination of the valve seat and the valve body is firm, the valve flap and the valve seat, the valve cover and the valve body, the valve stem and the valve flap linkage.   ⑤ Check whether the valve bedding, packing and fasteners (bolts) are suitable for the requirements of the nature of the working medium.
Common valve installation knowledge

2022-03-29 17:58:21

What is a valve?

 Valves are pipeline accessories used to open and close the pipeline, control the flow, regulate and control the parameters of the transported medium (temperature, pressure and flow). According to its function, it can be divided into shut-off valves, check valves, regulating valves, etc.
What is a valve?

2022-03-07 14:33:38

Principle of operation and role of pressure reducing valves

A pressure reducing valve is a valve that, through adjustment, reduces the inlet pressure to a certain required outlet pressure and relies on the energy of the medium itself to keep the outlet pressure stable automatically. From the viewpoint of fluid mechanics, a pressure reducing valve is a throttling element whose local resistance can be changed, i.e. by changing the throttling area, the flow rate and the kinetic energy of the fluid are changed, resulting in different pressure losses, thus achieving the purpose of pressure reduction. Then rely on the control and adjustment system adjustment, so that the fluctuation of the pressure after the valve and the spring force balance, so that the pressure after the valve within a certain error range to maintain a constant.
Principle of operation and role of pressure reducing valves

2022-03-07 14:24:12

How valves are maintained and serviced

In the welding before production and after the production of the valve professional maintenance work for the valve service in the production operation plays a vital role, correct and orderly and effective maintenance will protect the valve, so that the valve normal function and extend the service life of the valve. Valve maintenance work may seem simple, but it is not. There are often neglected aspects of the work.
How valves are maintained and serviced
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