The rapid blowdown valve at the bottom of the boiler is a pressure-bearing special valve installed on the boiler, steam drum, mud drum, and lower header of the water-cooled wall. It is used to discharge contaminated boiler water under high-temperature and high-pressure conditions.
After the feedwater is heated and evaporated into steam, dissolved salts, suspended mud and sediment in the water continuously accumulate in the boiler water. The blowdown valve discharges a portion of the wastewater to control the total dissolved solids (TDS) content of the boiler water, remove the deposited sludge, prevent boiler scaling, corrosion, steam-water foaming, and steam-water co-boiling problems, avoid overheating and cracking of the heating surface, and ensure qualified steam quality and safe operation of the boiler
The VP000 boiler blowdown valve has the following features:
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Quick opening and closing, instantaneous strong flushing of the discharge, reducing the erosion of the sealing surface.
Opening/closing time < 2 seconds, manual closing < 1 second.
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Hard-sealed material is resistant to erosion and has a long service life, suitable for high-temperature saturated water conditions.
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The packing has a long service life.
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The valve seat can be replaced by an upper-pressing type, making on-site maintenance of the valve convenient and fast.
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The flow path is simple and less likely to be clogged with impurities.
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Standard with manual operation, optional with pneumatic, and can be automatically opened for discharging in accordance with the controller to reduce heat energy loss caused by excessive discharging.
Technical Parameters
Size：DN15(NPS1/2)～DN50（NPS2）
Pressure：PN16～PN100、Class150～Class600
Connection：flange, thread, BW,SW
Air Pressure：0.4～0.6Mpa
Working Temperature： 100~320℃
Working medium: Saturated boiler water
Flow characteristic: Quick opening
Leakage level: V grade
Actuator model: MT1R + KS
Rated Cv
|
DN
|
DN15
|
DN20
|
DN25
|
DN32
|
DN40
|
DN50
|
|
Rated Cv
|
12
|
12
|
12
|
22
|
22
|
22
|
|
Travelmm
|
10
|
10
|
10
|
10
|
10
|
10
|
Figure 1 Pneumatic Blowdown Valve
