Scandi Brew (SB) Anti Vacuum Valve
Integrated in a SCANDI BREW® tank top system, the Alfa Laval SB Anti Vacuum Valve is a compact safety valve that minimizes the risk of implosion of tanks when a vacuum condition arises. These conditions occur while filling or emptying the vessel of liquid, cool rinsing after hot-cleaning or caustic cleaning in a CO2 atmosphere. Designed for use in the brewery, dairy, food and beverage industries, it helps optimize the safety, reliability and performance of critical processes and maximize uptime.
For other safety valve from Alfa Laval, click here.
Related Industries:
Food and Beverage Processings
Low initial cost of investment
With a durable and robust design, the SB Anti Vacuum Valve protects tanks from collapse due to internal vacuum conditions. Its low initial cost of investment provides return on investment over the long term as a result of operational reliability and enhanced service life, combined with reduced product loss, greater process safety and improved hygiene.
Compact valve design
Compact and robust, the hygienic SB Anti Vacuum Valve easily fits onto the top of any closed tank. The valve size and setting is based on the tank vacuum rating, maximum allowable emptying speed, cleaning procedure and process requirements.
Superior valve hygiene
Engineered to provide excellent hygiene and cleanability, the SB Anti Vacuum Valve features high-quality stainless steel with a surface finish of Ra ? 0.8?m. Alfa Laval seal technology also offers greater thermal stability, better chemical resistance and improved tensile strength. This highly reliable valve conforms to PED 97/23/EC requirements. Alfa Laval3.1 traceability certification is also available upon request.
- Low initial cost of investment
- Compact design
- Superior hygiene
- Easy installation
Concept
The Anti Vacuum Valve is used for minimizing the risk of implosion of
tanks exposed to vacuum e.g. during emptying, cool-rinsing after
hot-cleaning or caustic cleaning in a CO2 atmosphere. The Anti
Vacuum Valve can be applied on any closed tank.
Working principle
The Anti Vacuum Valve is delivered with counter weight set and locked
for an individual opening vacuum to suit the tank design data. When a
vacuum in the tank is lower than the preset opening value, the valve
opens and lets in atmospheric air.
Technical Data
| Nominal Size | Opening Pressure range | Allowable Pressure PS |
| 100mm | 50-500 mmH2O | 6 bar |
| 150mm | 25-500 mmH2O | 6 bar |
| 200mm | 25-500 mmH2O | 6 bar |
| 250mm | 25-300 mmH2O | 4 bar |
| 300mm | 25-500 mmH2O | 4 bar |
| 400mm | 25-100 mmH2O | 4 bar |
Physical Data
Materials
Product wetted steel parts: EN 1.4404 (AISI 316L) with 3.1 cert.
Product wetted steel surfaces: Surface roughness Ra<0.8 µm
Product wetted seals: EPDM
Product wetted polymers: PEEK
Other steel parts: EN 1.4307 (AISI 304L)
Standard design
The Anti Vacuum Valve is available in two versions:
• Integrated in a SCANDI BREW® tank top system
• Mounted on its own counter flange
Compliance Pressure Equipment Directive 2014/68/EU of the
European Community, Fluida Group II
The advantages of an integrated Anti Vacuum Valve are lower initial
costs, superior hygiene and smaller area required for seat valve.
The size and setting of the Anti Vacuum Valve is based on the tank
vacuum rating, maximum emptying speed, cleaning procedure and
process requirements. The Anti Vacuum Valve is produced in a
hygienic and robust design. Heating elements are available for valves
exposed to sub-zero temperatures.
It is very important to note that if the cleaning procedure includes
hot-cleaning, the valve should be dimensioned with the purpose of
preventing implosion from the vacuum that appears when flushing
with cold water.
The Anti Vacuum Valve should be seated horizontally. An inclination
of max. 5° is acceptable but the lever arm must then point in to the
center of the cylindro-conical tank top.
Cleaning In Place (CIP)
The Anti Vacuum Valve is cleaned, when closed, by the tank cleaning
head, but this will not include the valve seating.
To include the valve seating in the cleaning cycle, there are two options:
CIP Kit 1 – Force opener; splash guard
The valve is force-opened during tank CIP. The cleaning of valve seat
is dependent on cleaning jets from the tank cleaning head. Any CIP
liquid escaping the tank is contained by the splash guard and drains
back in to the tank.
CIP Kit 2- Force opener; splash guard; CIP nozzle; CIP closing
valve
The valve is force-opened during tank CIP. The cleaning of valve seat
is performed by the CIP nozzle. All CIP liquid from the CIP nozzle is
contained by the splash guard and drains back in to the tank.
NOTE: Applying any of above CIP options provides that the tank is
pressureless at the moment of force opening the Anti Vacuum Valve.
Options
Pos. 1: Force opener: force-opening during valve seat cleaning
Pos. 2: Splash guard: containing CIP liquid during valve seat cleaning
Pos. 3: CIP Nozzle: for cleaning valve seat
Pos. 4: CIP closing valve: applying CIP liquid
Pos. 5: Proximity sensor: for operation detection
Pos. 6: Welding flange: for installation
Heating elements: for valves exposed to sub-zero temperatures
