Battery Pack PRV Vent Blow Off Valve Round
Terms and Conditions
Orders Dispatched Within 24 hours - Excluding Weekends and Bank Holidays.
A round bodied pressure relief vent for a sealed battery enclosure. It breathes continuously so the box stays at atmospheric pressure as the pack heats and cools, keeps water and dust out while it does so, and blows open if pressure inside rises sharply.
The everyday job is breathing. A pack warms in use and cools overnight, and the air inside expands and contracts with it. With no vent, that swing has to go somewhere: it works air past your seals until they leak, or it bows the lid. The membrane passes air both ways while blocking liquid water, so the enclosure equalises without ever being open to the weather.
The second job is the one that matters on a bad day. If a cell vents, pressure inside a sealed enclosure rises far faster than a breathing membrane can cope with. Between 20 and 40 kPa the valve is driven fully open and gives the gas a deliberate, known way out. Without that, the enclosure chooses its own weakest point, which is usually a lid seal or a gland.
Fit one valve per 200 litres of enclosure volume. A large pack box usually needs more than one.
Key specifications
| Part | AR-BATPACKPRV |
|---|---|
| Type | Combined breather and pressure relief vent, round body |
| Airflow | 8 litres per minute or better at 10 kPa |
| Burst pressure | 20 to 40 kPa |
| Operating temperature | -40 °C to +125 °C |
| Ingress protection | IP67, holding against 12 kPa water, over 1 metre depth |
| Sizing | 1 valve per 200 litres of enclosure volume |
| Weight | 0.3 kg |
Features
- Does two jobs in one part: continuous pressure equalisation, and emergency blow off
- IP67 sealed, so the enclosure breathes without letting water or dust in
- Rated from -40 °C to +125 °C
- Defined burst range, so the box fails where you decided it would rather than at a seal
- Round body, which suits a plain drilled hole rather than a shaped cut out
Compatibility
For sealed EV battery enclosures, energy storage cabinets and any other sealed box containing cells.
We list this valve in three body styles: this round one, a standard rectangular version and a smaller version for compact enclosures. Same two jobs and the same burst range; choose on what suits your enclosure face and your cut out.
Mount it high on the enclosure, on a vertical face where it cannot sit under standing water and where venting gas is directed away from the cabin and from anyone working on the vehicle.
In the box
- 1 x PRV vent blow off valve
Downloads
No document is published for this variant. The datasheet and dimensioned drawing published on the standard PRV cover the same performance figures.