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SB Anti Vacuum House

SB Anti Vacuum HouseConcept

The Anti Vacuum House 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 House can be combined with safety valves or pressure regulators mounted the top.

Working principle

The Anti Vacuum House operates as standard at 50 mm
H2O / 5 mbar for all valve sizes. Safety valves protect the vessel and ensures discharge if pressure in the tank exceeds the preset opening value. Regulating valves ensures pressure exhaust if pressure in the tank exceeds the preset opening value.

Standard design

The Anti Vacuum House can be cleaned during tank CIP cycle by connecting CIP nozzle to main CIP supply. CIP flow is approximately 500-800 l/min. When the tank is cleaned a small volume of cleaning fluid will pass the valve body and clean the seat. To ensure thorough flushing of valve seat, force opening of the valve is necessary – this must be done when the tank is pressureless. The use of a drain collector is recommended to prevent CIP fluid spilling on to the tank. Compliance to PED 97/23/EC of the European Community

Documentation

Construction

Compliant with PED 97/23/EC, the Alfa Laval SB Anti Vacuum House consists of an AISI 316L stainless steel house, a vacuum tail and an EPDM seal. The valve can be used as an integral part of a SCANDI BREW® tank top system.

Operating principle

The anti vacuum house provides protection against tank collapse due to internal vacuum conditions. When used with safety valves, it helps protect the vessel and ensure discharge if pressure in the tank exceeds the preset opening value. When used with regulating valves, it helps ensure pressure relief if pressure in the tank exceeds the preset opening value.

Cleaning-in-Place (CIP)

During every tank cleaning cycle, a small volume of cleaning fluid (approximately 500 to 800 l/min.) will pass the valve body and clean the seat. To ensure thorough flushing of the valve seat, force opening of the valve is required and must be done when there is no pressure in the tank. The use of a drain collector is recommended to prevent the CIP fluid from spilling onto the tank.

Options

For tank overpressure protection and process protection, the SB Anti Vacuum House can be combined with a CO2 house, pressure relief valve and pressure exhaust valve.

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