Select the type of valve
The choice of valve type is pre-requisite for a comprehensive estimate of the entire production process. While choosing the type of valve, you should first understand the structure and unique performance of each type of valve.
The valve opening and closing member has four movement modes, namely, blocking, rotating, sliding and clamping. Each type of exercise has its advantages and disadvantages (Table 4 - 1 )
Table 4 - 1 Advantages and Disadvantages of Various Movements
category | Icon | advantage | Disadvantage |
Occlusion | Deadline | Cutting and adjusting performance | Large head loss |
Rotate | Plug cone | Fast action DC | The temperature is limited by the Teflon valve bushing, and it is necessary to pay attention to the "lubrication" of the valve. |
ball | Fast action DC is easy to operate | Temperature is limited by seat material | |
Butterfly board | Fast action cutoff performance is good and compact | Metal-to-metal seal type valves cannot be cut off strictly when cut. Valve for the elastomeric seat. Operating temperature is limited by seat material | |
slide | gate | DC | Slow movement and large size |
Clamping | Â | No filler is reliable for shut off the dirty liquid | Pressure and temperature are limited by diaphragm material |
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