Several simple butterfly valve method

1. Classified by structure (1) Central sealing butterfly valve (2) Single eccentric sealing butterfly valve (3) Double eccentric sealing butterfly valve (4) Three eccentric sealing butterfly valve 2. According to the sealing surface material classification (1) soft sealing butterfly valve. 1) The sealing pair is made of non-metallic soft material to non-metallic soft material. 2) The sealing pair is made of metal hard material to non-metal soft material. (2) metal seal butterfly valve. The sealing pair is made of metal hard material to metal hard material. 3. Classified by seal (1) Forced seal butterfly valve 1) Elastomeric seal butterfly valve. Sealing pressure ratio by the valve is closed when the valve plate squeeze valve seat, valve seat or valve plate flexibility 2) plus torque sealing butterfly valve. Sealing than the pressure applied by the valve shaft torque (2) pressure sealing butterfly valve. Sealing than the pressure from the valve seat or valve plate elastic seal components generated pressure (3) automatic sealing butterfly valve. Sealing pressure is automatically generated by the media pressure. 4. Classified by working pressure (1) Vacuum butterfly valve. Work pressure is lower than the standard reactor atmosphere calendar butterfly valve. (2) low pressure butterfly valve. Butterfly valve with nominal pressure PN <1.6MPa. (3) medium pressure butterfly valve. Nominal pressure PN 2.5 - 6.4MPa butterfly valve. (4) high pressure butterfly valve. Nominal pressure PN 10.0 - 80.0MPa butterfly valve. (5) Ultra-high pressure butterfly valve. Nominal pressure PN> 100MPa butterfly valve. 5. Classified by working temperature (1) High temperature butterfly valve. Butterfly valves with t> 450 C (2) Medium temperature butterfly valves. Butterfly valves of 120 C <t <450 C (3) Normal temperature butterfly valves. A 40C <t <; 120 C butterfly valve (4) low temperature butterfly valve. A 100 <t <a 40 C butterfly valve (E) ultra-low temperature butterfly valve. t <a 100 C butterfly valve 6. According to the connection classification (1) on the butterfly valve. (2) Flanged butterfly valve. (3) Bellow butterfly valve. (4) welded butterfly valve.

Diffuser Bottle

What are the hazards of indoor drying? What are the effects of humidification on human health?

With the emergence of air conditioning, heating, geothermal and other good things, we can enjoy comfortable indoor temperature in both cold winter and hot summer, but followed by indoor drying. In summer, especially when it doesn't rain, it's easy to get dry indoors. My mouth and nose are very dry when I wake up every day. It's not only bad for my health, but also very uncomfortable

Indoor drying is easy to cause the spread of bacteria. Reforming the air is the main reason for the floating of dust and suspended particles, while bacteria can not exist alone and usually adhere to the dust. People with weak physical resistance are vulnerable to bacteria and viruses.



Indoor dryness can also lead to excessive loss of body water and accelerate aging. Our skin fibers are composed of a large amount of water-soluble collagen. Drying will make the muscle fibers lose water and contract rapidly. If the muscle fibers are dry for a long time, they may break, and the skin will have unrecoverable wrinkles. Especially, women are more likely to have wrinkles due to lack of water. At this time, we need an Aroma Diffuser are the hazards of indoor drying? What are the effects of humidification on human health?

With the emergence of air conditioning, heating, geothermal and other good things, we can enjoy comfortable indoor temperature in both cold winter and hot summer, but followed by indoor drying. In summer, especially when it doesn't rain, it's easy to get dry indoors. My mouth and nose are very dry when I wake up every day. It's not only bad for my health, but also very uncomfortable

Indoor drying is easy to cause the spread of bacteria. Reforming the air is the main reason for the floating of dust and suspended particles, while bacteria can not exist alone and usually adhere to the dust. People with weak physical resistance are vulnerable to bacteria and viruses.



Indoor dryness can also lead to excessive loss of body water and accelerate aging. Our skin fibers are composed of a large amount of water-soluble collagen. Drying will make the muscle fibers lose water and contract rapidly. If the muscle fibers are dry for a long time, they may break, and the skin will have unrecoverable wrinkles. Especially, women are more likely to have wrinkles due to lack of water. At this time, we need an aroma diffuser

Aroma DiffuserOil DiffuserAir DiffuserElectric Diffuser

Diffuser Bottle,Wall Plug Heater Electric,Fireplace Air Heaters,Space Square Heater,Portable Desk Heater

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