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APV_VRA_UK-3_032017.indd
Vacuum Valve
DELTA VRA 11
Instruction Manual: UK – rev. 3
APV
UK
3. Intended Use
The intended use as field of application of the vacuum valve DELTA
VRA is the protection against negative pressure in containers/tanks.
Arbitrary, constructive changes at the valve will influence safety
as well as the intended functionality of the valve and are not
permissible.
4. Mode of Operation
The VRA valve is used in applications in which equipment
can be damaged by vacuum (e.g. in tanks or pipelines).
If a vacuum occurs, the valve opens by the valve seat being pulled
down against spring force in order to relieve the vacuum in the
system. The closing process is only released by the spring force if
the vacuum does no longer exist.
5. Auxiliary Equipment
- Seat lift actuator (standard)
The VRA valve is equipped with a seat lift actuator (A) which is used
during the cleaning process and / or for remote functional control.
- Valve feedback
A switch to indicate the closed or open position of the valve seat
(ON/OFF) can be installed at the valve (C) on request.
- Cleaning device (standard)
The valve is equipped with an integrated cleaning nozzle (B).
VRA 11
A
B
C
G
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