Alfa Laval SB Anti Vacuum House
The Alfa Laval SB Anti Vacuum House provides protections against tank collapse due to internal vacuum conditions. It is CIP'able and can be combined with safety or pressure regulators that are mounted to the top of tanks. When used with safety valves, it helps protect the vessel and ensures discharge if 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.
Alfa Laval is a leading global supplier of products and solutions within the key technology areas of heat transfer, separation, and fluid handling.
Concept
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 on the top.
Working Principle
The Anti Vacuum House operates as standard at 50 mmH2O/5mbar for all valve sizes. Safety valves protect the vessel and ensure 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 cycles by connecting a CIP nozzle to the main CIP supply.
CIP flow is approximately 500-800 I/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 pressure-less. The use of a drain collector is recommended to prevent CIP fluid spilling on to the tank.
Technical Data
| Nominal Size (in) | Opening Pressure(mmH2O) | Allowable Pressure (bar) |
|---|---|---|
| 2 | 50 | 4.5 |
| 3 | 50 | 4.5 |
| 4 | 50 | 4.5 |
| 6 | 50 | 4.5 |
Materials
| Product Wetted Seal Parts | 316L |
| Product Wetted Seals | EPDM |
Options
The Anti Vacuum House provides vacuum protection and can be combined with other valves to provide the following functions:
- Safety valves for tank overpressure protection
- Regulating valves for process protection
Available Combinations
| Anti Vacuum House | Regulating Valve | Regulating Valve | Safety Valve |
|---|---|---|---|
| Nominal Size (in) | CO2 House | Pressure Exhaust | Pressure Relief Valve |
| 2 | X | X | |
| 3 | X | X | X |
| 4 | X | X | X |
| 6 | X | X | X |
Product Resources
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