Breather valves
Details
PV relief valves are safety equipment designed to protect tank against rupturing or imploding. As long as the tank pressure remains within the valve pressure and vacuum setting the pallets remains in contact with the seat ring and no venting or breathing take place. If direct atmosphere discharge or nitrogen is used on vacuum inlet, a flanged connection is available.
PV relief valve is commonly referred to as a “breather valve” beacause
of its primary function.
Flame arrester can be mounted directly upstream of breather vent.
Features
SIZE: 4” (100 mm) through 8” (200 mm)
CONSTRUCTED: aluminium, carbon steel, stainless steel,
additional metals and coatings
SETTING PRESSURE: +2,5 mbar to +50 mbar
SETTING VACUUM: -2,5 mbar to -30 mbar
FLANGE RATING: ANSI 150, PN16
Products
series 1000
• pipeaway connection on Pressure and process side
• pallet guide outside the process
Materials
| DESCRIPTION | STANDARD MATERIALS OF CONSTRUCTION | ||
| CARBON STL | SS | SPECIAL | |
| nut, hex | SS | SS | SS |
| cover | AL GR 356 T6 | CS WCB | SS |
| gasket, cover | NON-ABS | NON-ABS | NON-ABS |
| pallet, pressure | SS | SS | SS |
| o-ring, plate pallet (2) | VITON | VITON | VITON |
| flange | SS | SS | SS |
| rod, guide | SS | SS | SS |
| stem, pressure | SS | SS | SS |
| body | AL GR 356 T6 | CS | SS |
| stud - nut | SS | SS | SS |
Dimensions
| DN | 4" | 6" | 8" |
| A | 520 | 778 | 1010 |
| B | 327 | 418 | 484 |
| C | 170 | 248 | 330 |
| D | 235 | 355 | 460 |
| E | 191 | 263 | 305 |
Dimensions shown are for reference only. Contact factory for certified drawings.