Gas Burner Metal Seal Butterfly Valve Lever Type
In order to meet the requirements of industrial applications such
as high and low temperature, strong erosion, and long life, metal
seal butterfly valves have been greatly developed. With the
application of high temperature resistance, low temperature
resistance, strong corrosion resistance, strong erosion resistance,
and high strength alloy materials in butterfly valves, metal sealed
butterfly valves have been widely used in industrial fields such as
high and low temperature, strong erosion, and long life. The
emergence of large diameter (9 ~ 750mm), high pressure (42.0MPa),
wide temperature range (-196 ~ 606 ℃) butterfly valve, so that the
butterfly valve technology reached a new level.
When the butterfly valve is fully opened, it has a small flow
resistance. When the opening is between about 15 ° ~ 70 °, it can
perform sensitive flow control, so the butterfly valve is very
common in the field of large-diameter adjustment.
Due to the wiping nature of the butterfly valve butterfly plate,
most butterfly valves can be used for media with suspended solid
particles. Depending on the strength of the seal, it can also be
used in powder and granular media.
Butterfly valves are suitable for flow regulation. Because the
pressure loss of the butterfly valve in the pipe is relatively
large, about three times that of the gate valve, when selecting the
butterfly valve, the influence of the pressure loss of the pipeline
system should be fully considered, and the strength of the
butterfly plate to withstand the pressure of the pipeline medium
when closing . In addition, the working temperature limit of the
elastic valve seat material at high temperatures must also be
considered.
The structure length and overall height of the butterfly valve are
small, the opening and closing speed is fast, and it has good fluid
control characteristics. The structure principle of butterfly valve
is most suitable for making large diameter valve. When the
butterfly valve is required for flow control, the most important
thing is to correctly select the size and type of the butterfly
valve so that it can work properly and effectively.
Generally, in throttling, adjustment control and mud media, short
structure length, fast opening and closing speed, low pressure
cut-off (small pressure difference) are recommended, and butterfly
valves are recommended. Butterfly valves can be used when there are
two-position adjustment, reduced diameter channels, low noise,
cavitation and vaporization, a small amount of leakage into the
atmosphere, and abrasive media. Throttle adjustment under special
working conditions, or strict sealing, severe wear, low temperature
(cryogenic) and other working conditions.
