Connection mode of pneumatic butterfly valve
Clarification: the static parameter diagram is the bearing capacity/stroke curve of a group of isobars (0.2MPa~0.8MPa) and the volume/stroke curve at 0.7MPa.
The figure shows the coordinate axis of bearing capacity, height and volume, as well as the shaded area on the right side of the design height line and safety extension line (try not to use or use pneumatic butterfly valve carefully in this area) l Selection and application guide of pneumatic butterfly valve ------ as the selection guide of air stroke conditioner ★ Stroke
The maximum travel is the difference between the maximum safe extension height and the minimum tightening height. The whole journey or any part of it can be used. If the internal buffer is required, please indicate the minimum height value added. The addition of the buffer will lead to a decrease in the total stroke.
Take 300180J-2 as an example:
1. The minimum height, maximum height, design height and safe extension height can be read directly from the abscissa in Figure 1 (Page 11), which are 85, 235, 180, 2062 respectively. Full stroke=maximum height - minimum height=235-85=150mm safe stroke=safe extension - minimum height=206-85=121mm
power
The force here refers to the force you want to support or promote in the application. You can read the force value directly from the static parameter diagram. Note that under normal conditions, the force decreases with the increase of height. Take 300180J-2 as an example.
1. Calculate the bearing capacity of the set height under a certain inflation pressure: if the inflation pressure P=5Kg/cm2 and the height H=115mm, then the bearing capacity of the air ball valve is C=2600Kg according to the figure, for example, point (1) corresponds to the point on the ordinate.
2. Calculate the effective area of the set height (115mm) under a certain inflation pressure: A=C/P=2600 ÷ 5=520cm23; calculate the internal volume when the inflation pressure is P=7Kg/cm2 and the height is 115mm: 5.61dm3 is found in Figure 1 (Page 11), for example, point (2) corresponds to the point on the volume coordinate axis.
It is specially pointed out here that the content volume of the pneumatic butterfly valve changes little with the increase or decrease of the inflation pressure, so only a volume/stroke curve under the pressure of 0.7MPa is given, and the volume values under other pressures can be approximately found from this curve.
Selection of air inlet size
The size of the air inlet is directly related to the response flexibility of the pneumatic butterfly valve during operation. Generally, the larger the air inlet is, the more flexible the response will be.