Solenoid valves - Bürkert Fluid Control Systems

7.6.
Valve block for the
food industry
Valve block in the test
units
Field of application
Particularly suitable in the food industry
for filling containers with viscous
media such as yogurt or jam. Or as a
test unit in test stands for tightness
testing on the basis of a reference
specimen.
Design
As test unit in this example: the process
valves are bellows valves which
are controlled pneumatically via docked
pilot valves.
Characteristics
■ Medium pressure range:
vacuum up to 8 bar
■ Pilot pressure range: 4.5 to 5.5 bar
■ Medium port: G1/8 threaded port
■ Pneumatic port: M5 threaded port
■ Medium temperature range:
-30 to +100 °C
■ Max. ambient temperature:
0 to +55 °C
■ Arrangement of inlet and outlet
bores: application-specific, also
laterally offset for enhanced flushing
or mixing of the valve interior.
Bellow valve
P
Compressed
air inlet
Bellow valve
Bellow valve
Bellow valv
Reference
unit port
Venting,
pneumatic system
Venting,
housing
Outlet
towards
housing
Components/Function Quantity Typical parameters
2/2-way bellow valve 2 Pneumatically actuated, DN 6 mm;
nomally closed
2/2-way bellow valve 3 Pneumatically actuated, DN 6 mm;
nomally open
Pilot valve 3 3/2-way flipper solenoid valve with bistable
(impulse) switching function
Pilot valve 1 Stainless steel 1.4305 (optionally 1.4571),
integrated valve seats
58/59