Multiple Flow Pressure Relief Vents
$550.00
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Multiple Flow Pressure Relief Vents
The PV range of dual-acting pressure relief vents is a breakthrough development in pressure relief technology for gaseous extinguishing systems. These gravity-balanced vents ensure foolproof operation and deliver excellent efficiency with a validated free vent area across all pressure levels. The vents are designed to begin opening at 60 to 80 Pascals and are fully open at 125 Pascals in both directions.
With over 75% free vent area at 125 Pascals, the PV vents reduce the need for multiple vents, smaller holes, and less construction work. This design provides an optimal solution with a wider size range, improving both performance and ease of installation.
The PV range is fire-rated for up to 2 hours to EN1364-1, with certification (pending) and verified operation. Detailed measurement reports are available upon request.
The range is offered in two kits: one for internal use (PV vent) and one for external use (PV vent with a louvre). The external kit includes a choice of a fixed blade or dynamic louvre, ensuring enhanced weather resistance. When installing in doors or narrow walls, the external wall flange serves as a cover trim.
Standard-sized models are available in stock, with special sizes available on request, delivered within 6 to 10 weeks.
- 1 x Multiple Flow Pressure Relief Vent (Choose Size)
Dimension reference
A/B = vent blade opening · C/D = vent frame · E/F = external wall flange / cover trim. Metric values as specified; imperial converted.
Dimensions by model
| Dimension | PV150 | PV300 | PV450 | PV600 | PV750 | PV1050 |
| Units | mm / in | mm / in | mm / in | mm / in | mm / in | mm / in |
| A Vent width (blade opening) | 350 mm 13.8 in |
350 mm 13.8 in |
450 mm 17.7 in |
600 mm 23.6 in |
750 mm 29.5 in |
1050 mm 41.3 in |
| B Vent height (blade opening) | 150 mm 5.9 in |
300 mm 11.8 in |
450 mm 17.7 in |
600 mm 23.6 in |
750 mm 29.5 in |
1050 mm 41.3 in |
| C Frame width | 500 mm 19.7 in |
500 mm 19.7 in |
600 mm 23.6 in |
750 mm 29.5 in |
900 mm 35.4 in |
1200 mm 47.2 in |
| D Frame height | 300 mm 11.8 in |
450 mm 17.7 in |
600 mm 23.6 in |
750 mm 29.5 in |
900 mm 35.4 in |
1200 mm 47.2 in |
| E Wall flange width | 570 mm 22.4 in |
570 mm 22.4 in |
670 mm 26.4 in |
820 mm 32.3 in |
970 mm 38.2 in |
1270 mm 50.0 in |
| F Wall flange height | 318 mm 12.5 in |
468 mm 18.4 in |
618 mm 24.3 in |
768 mm 30.2 in |
918 mm 36.1 in |
1218 mm 48.0 in |
| Wall opening (W × H) | 430 × 175 mm 16.9 × 6.9 in |
430 × 325 mm 16.9 × 12.8 in |
530 × 475 mm 20.9 × 18.7 in |
680 × 625 mm 26.8 × 24.6 in |
830 × 775 mm 32.7 × 30.5 in |
1130 × 1075 mm 44.5 × 42.3 in |
| Wall thickness (standard sleeve) | 110–240 mm 4.3–9.4 in |
110–240 mm 4.3–9.4 in |
110–240 mm 4.3–9.4 in |
110–240 mm 4.3–9.4 in |
110–240 mm 4.3–9.4 in |
110–240 mm 4.3–9.4 in |
| Free vent area @ 125 Pa | 0.036 m² 0.39 ft² |
0.073 m² 0.79 ft² |
0.151 m² 1.63 ft² |
0.270 m² 2.91 ft² |
0.420 m² 4.52 ft² |
0.820 m² 8.83 ft² |
Series specifications
| Specification | Detail |
| Type | Dual-acting (bi-directional), gravity-balanced pressure relief vent |
| Operation | No springs, no power, no adjustment |
| Opening pressure | 60–80 Pa (0.24–0.32 in. w.c.) |
| Fully open | 125 Pa (0.50 in. w.c.), positive and negative direction |
| Free vent area | > 75% of frame opening at 125 Pa (lab verified) |
| Fire rating | 2 hour to EN 1364-1 — full range (certification pending) |
| Flange | 75 mm (2.95 in) on all models |
| Wall thickness | 110–240 mm (4.3–9.4 in) standard; extended sleeve available for thicker walls |
| Kits | Internal kit (vent only) · External kit (vent + louvre) |
| Louvre options | Fixed blade, or dynamic (weather-proof) louvre |
| Finish | Powder coated white; any RAL colour on request |
| Materials | Steel; stainless steel available on request |
| Custom sizes | Any size, colour or material — 6 to 10 week lead time |
| Guarantee | 3 years |
| Origin | Designed and manufactured in the Netherlands |
Fire rating certification pending. Detailed measurement and verification reports available on request.
