6
YT-520/525 series
2.7
Operation Logic
When the signal (main) pressure is higher than the setting pressure level, the signal pressure
pushes the upper diaphragm (
⑩
), and the pressure will be directed to lower chamber and
pushes lower diaphragm (
⑪
). Lower diaphragm (
⑪
) pushes the pusher (
○
12
) and the seat
(
○
15
), and the air channel to OUT1 port will be opened, and the supply pressure will be
directed to OUT1 port. When the signal (main) pressure is lower than the setting pressure
level, the upper diaphragm (
○
10
) will be pushed down and will block the channel to the lower
chamber. Pressure from the lower chamber will be exhausted through the hole in the
middle of the upper diaphragm (
⑩
), and as the pressure gets lower in the lower chamber,
the lower diaphragm (
⑪
) will be lifted, and the pusher (
○
12
) and seat (
○
15
) will be disconnected.
The supply pressure will be directed to OUT2 port through the seat (
○
15
).