Burkert Type 6520 - Manual (Page 7)

6520 - 5
english
5/2 way valve:
In standby position, pressure port 1 connected to outlet 2.
Outlet 4 vented
3/2 way valve with return of exhaust:
In standby position, pressure port 1 blocked, outlet 2 vented
into output 4
The integrated exhaust air feedback prevents the penetration of ambient air into
the spring recess of the drive.
NOTE Application in either 5/2 or 3/2 way type.
To convert from the 5/2 to the 3/2 way model, or vice versa,
turn the change-over plate through 180°. When using as a 3/2
way valve, close off outlet 3 with the supplied G1/4 locking
screw. This ensures that the integrated feedback of outgoing
air functions correctly.
3.3 Operation
• Filtered compressed air, oiled or unoiled (max. particle size 5 µm)
• Sealing material: PB = Polyurethane and NBR
• Permissible temperature range: - 20 to +50 ° C
• Operating pressure range: 2,5 to 7 bar
ATTENTION!
Note the permissible pressure range given on the rating
plate. Pressure difference between port 1 and 3/5 > 2,5 bar.
The valve is driven using instrument air, and serves as a 3/2 or 5/2-way valve
for the switching of non-inflammable media. The valve must only be operated in
the mounted condition, unless it is ensured that explosive atmospheres can
only rarely penetrate the interior of the valve, and only for short periods.
3.4 Medium