ARI Armaturen Vacuum breaker PN40 EN - Manual (Page 3)

Rev. 0040807005 2404 Page 3
Operating and installation instructions
Vacuum breaker
4.0 Description
4.1 Scope of applications
Vacuum breakers are used for the venting of systems where the pressure should not drop
below atmospheric pressure.
The information complies to the Pressure Equipment Directive 97/23/EC.
It is the responsibility of the machine planner to ensure compliance.
The special markings on the valve must be taken into account.
Refer to the catalogue sheet to see which materials are used in standard versions.
Please contact the supplier or the manufacturer if you have any questions.
4.2 Operating principles
(refer to Fig. 1 page 4)
If system pressure drops below atmospheric pressure, the ball (Pos. 3) is lifted from the
seat chamfer in the body (Pos. 1), allowing air to enter the system.
If system pressure rises above atmospheric pressure, the ball (Pos. 3) seals the seat
chamfer in the body (Pos. 1).
ATTENTION !
- Refer to the data sheet for applications, limits on use and possibilities.
- Certain media require or preclude the use of special materials.
- The valves are designed for standard operating conditions. If conditions exceed
these requirements, e.g. aggressive or abrasive media, the operator should
state the higher requirements when ordering.
- Valves made from grey cast iron are not authorised for use in systems subject
to TRD 110.