The tank top vacuum valve is a small safety device that protects tanks from collapsing inward when a vacuum forms inside. This can happen during filling, emptying, or cooling after cleaning with hot water or caustic solutions in a CO2 environment. It is mainly used in breweries, dairies, and food and beverage plants to keep operations safe and reduce downtime.
The valve works with a preset counterweight. When the vacuum inside the tank drops below the set level, the valve opens automatically and allows outside air to enter, preventing damage. It can be installed on any closed tank.
1.Low initial cost of investment
2.Compact design
3.Superior hygiene
4.Easy installation
| Material grade | Product contact parts | 304L/316L (1.4307/1.4404) | |
| Non-product contact parts | 304 (1.4301) | ||
| Provide EN 10304 3.1B Certificate | |||
| Seal Material | Standard | EPDM | |
| Option | FPM, Silicone, PTFE, NBR | ||
| All seal materials comply with FDA 177.2600 | |||
| Temperature Range | -20°C~+135°C (EPDM) | ||
| Pressure | Pressure | 0.5~2.0 bar | |
| Vacuum | 0.3~0.9 bar | ||
| Roughness | Internal Surface | Ra≤0.8μm | |
| External Surface | Ra≤1.6μm | ||
| Connection | Connection Method: Clamp | ||
Reliable vacuum condition prevention valve for tank safety
Reduces risk of tank implosion during CIP or production cycles
Improves overall safety standards as a hygienic vacuum relief valve for closed tanks
Low installation cost with long-term operational value
The VTY tank top vacuum valve operates on a simple yet highly reliable counterweight-balanced mechanism – no complex electronics or external power sources required. Its core principle is instantaneous pressure equalization to prevent tank implosion.
Under normal atmospheric or positive pressure, the counterweight holds the sealing disc firmly against the valve seat. The tank remains fully sealed to maintain product integrity and hygiene.
During draining, cooling, or CIP cycles, the internal pressure drops below the preset vacuum threshold (0.3–0.9 bar). The negative pressure overcomes the counterweight force.
The sealing disc lifts within milliseconds, creating an opening that allows ambient air to rush into the tank. Pressure equalizes instantly – before any structural deformation can occur.
Once the internal pressure returns to safe levels, the counterweight re-engages, pushing the sealing disc back into position. The valve resets automatically – no manual intervention needed.
As a state-certified high-tech enterprise with over a decade of experience in sanitary fluid handling, VTY brings industrial-scale manufacturing precision to every valve we produce. Our facility operates 134 MAZAK CNC machining centers – over 90% Japan-origin – ensuring micron-level dimensional accuracy across all components.
Every tank top vacuum valve undergoes rigorous inspection in our in-house QA laboratory, equipped with 3D coordinate measuring machines (CMM), spectrometers, surface roughness testers, and hardness testers. We don't just claim quality – we document it with EN 10204 3.1B material certificates and full traceability from raw material to finished product.
An anti-vacuum valve is used to protect tanks and pipelines from collapsing or imploding by automatically letting air inside when a dangerous vacuum occurs.
316L is superior for product-contact parts because its added molybdenum provides exceptional resistance to pitting from food acids, salts, and harsh CIP chemicals.
A tank-top vacuum valve only opens to let air in to prevent the tank from collapsing under vacuum, whereas a tank-top pressure valve only opens to vent excess gas out to prevent the tank from bursting under high pressure.
A tank-top vacuum valve is installed at the highest point of a storage tank's top dome or lid to ensure unhindered airflow and prevent the vessel from collapsing during draining or cool-down cycles.
A: While most suppliers use 304 for non-contact parts, VTY uses enhanced 304 (1.4301) with a superior surface finish (Ra≤1.6μm) to prevent rust in humid environments. Additionally, we provide full material traceability with EN 10204 3.1B certificates, which is a mandatory requirement for most European dairy and pharmaceutical projects.
A: For EPDM seals in daily CIP cycles (under 135°C), we recommend visual inspection every 3-6 months. The spring mechanism is designed for 100,000+ cycles, but heavy sugar or syrup residue can affect responsiveness – VTY offers custom PTFE seals for high-viscosity applications to reduce sticking risks.
| Size | A | B | H | L |
|---|---|---|---|---|
| DN50 | 14 | 52 | 28 | 240 |
| DN65 | 160 | 70 | 28 | 250 |
| DN80 | 190 | 85 | 32 | 270 |
| DN100 | 210 | 104 | 32 | 280 |
| DN125 | 240 | 129 | 36 | 300 |
| DN150 | 265 | 154 | 36 | 320 |
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No.729, Road 3, Binhai Industrial Zone, Wenzhou, Zhejiang, China
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