Burkert Type 2000 - Manual (Page 10)

10
Start-Up
The actuator can be rotated infinitely by 360°. See section
“7.2. Rotating the actuator”.
control air hose: Use size 1/4" or 1/8" control air hoses
(actuator ø 40 mm).
Control
function
Pilot air port
Top
Bottom
Pilot air
port
Top Bottom
A
B
I
Closes Opens
the valve
Aggressive environment: discharge free pilot air ports via a
hose into a neutral atmosphere.
8. STarT-uP
• Observe the type label specifications and information on
pressure and temperature values in section “6. Technical
data”.
• Observe the information on the Ex area in section “4”!
8.1. control pressure
Warning!
For control function i – danger if control pressure fails!
If the pressure fails, no defined position is reached.
• For a controlled restart, initially pressurize the equipment with
control pressure and then connect the medium.
→
Set the control pressure according to the type label specifica-
tions, section “6” and flow direction (section “8.2” and “8.3”).
8.2. Flow above the seat
Control function A, CFA: closes by spring force with the medium flow.
The medium pressure supports the closure and seal of the valve seat.
The valve is opened by the control pressure.
Warning!
risk of injury due to water hammer!
A closing shock can cause lines and the equipment to burst.
• Only use valves with the flow above the seat for gaseous media.
english
Type 2000