Classification of Vavle

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The valve has a wide range of uses and types, which can be generally divided into two types:

1. automatic valve: a valve that operates by itself depending on the capacity of the medium (liquid and gas). Such as check valve, safety valve, regulating valve, drain valve, pressure reducing valve, etc.

2. driving valve: valve operated by manual, electric, hydraulic and pneumatic means, such as butterfly valve, ball valve, gate valve, stop valve, book flow valve, plug valve, etc.

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According to the driving mode, it can be divided into:

1. Electric: driven by motor or other electrical devices.

2. Hydraulic: driven by (water, oil). Swing type sliding type

3. Pneumatic; use compressed air to drive the valve to open and close.

4. Manual: with the help of handwheel, handle, lever or sprocket, it is driven by manpower. When the transmission torque is large, it is equipped with speed reduction devices such as wheel and gear.

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 According to the purpose, the valve can be divided into:

1. Breaking function: used to connect or cut off pipeline medium, such as stop valve, gate valve, ball valve, Cambodian valve, etc.

2. Check function: used to prevent backflow of medium, such as check valve.

3. Regulating function: used to regulate the pressure and flow of medium, such as regulating valve and pressure reducing valve.

4.Distribution function: it is used to change the flow direction of medium and distribute medium, such as three-way plug, distribution valve, and purge.

5. Safety valve: when the medium pressure exceeds the specified value, it is used to discharge redundant medium and ensure the safety of pipeline system and equipment, such as safety valve and emergency valve.

6. Other special factions: such as drain valve, vent valve, drain valve, etc.

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I take a bottle of wine and I go to drink it among the flowers.
We are always three -
counting my shadow and my friend the shimmering moon.
Happily the moon knows nothing of drinking,
and my shadow is never thirsty.
When I sing, the moon listens to me in silence.
When I dance, my shadow dances too.
After all festivities the guests must depart;
This sadness I do not know.
When I go home,
the moon goes with me and my shadow follows me.


Post time: Apr-17-2020
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