Alfa Laval SB Anti Vacuum Valve
The Alfa Laval SB Anti Vacuum Valve helps minimize the risk of tank implosion due to internal vacuum conditions. 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.
The SB Anti Vacuum Valve fits onto any closed tank. Valve size and setting is based on the tank vacuum rating, maximum allowable emptying speed, cleaning procedure, and process requirements.
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 Valve is used for minimizing the risk of implosion of tanks exposed to a 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 counterweight 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.
Standard Design
The advantages of an integrated Anti Vacuum Valve are lower initial costs, superior hygiene, and a smaller area required for a 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 cylinder-conical tank top.
Technical Data
| Nominal Size (in) | Opening Pressure Range | Allowable Pressure (psi) |
|---|---|---|
| 3.94 | 50-500 mmH2O | 87.02 |
| 5.91 | 25-500 mmH2O | 87.02 |
| 7.87 | 25-500 mmH2O | 87.02 |
| 9.84 | 25-300 mmH2O | 58.02 |
| 11.81 | 25-500 mmH2O | 58.02 |
| 15.75 | 25-100 mmH2O | 58.02 |
Materials
| Product Wetted steel Parts | 316L |
| Product Wetted Seals | EPDM/NBR |
| Product Wetted Polymers | PEEK |
| Other Steel Parts | 304L |
Integrated Valve
Flange Mounted Valve
Interface Requirements
| Nominal Size (in) | ID (in) | BC (in) | OD (in) | # of Bolts | H1 (in) | H2 (in) | W (in) |
|---|---|---|---|---|---|---|---|
| 3.94 | 3.94 | 6.50 | 7.87 | 4 | 12.20 | 1.18 | 20.08 |
| 5.91 | 5.91 | 9.06 | 10.63 | 8 | 12.78 | 1.18 | 21.65 |
| 7.85 | 7.85 | 11.02 | 12.60 | 8 | 12.20 | 1.18 | 2.76 |
| 9.85 | 9.85 | 12.99 | 14.57 | 8 | 12.80 | 1.18 | 23.62 |
| 11.81 | 11.81 | 14.96 | 16.54 | 12 | 19.69 | 1.18 | 37.01 |
| 15.75 | 15.75 | 20.28 | 22.85 | 12 | 19.29 | 1.18 | 39.76 |
Product Resources
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