Inbreathing Vacuum Vent (1.625″ – 12 Threads)

The 6234 is a single purpose in-breathing spring loaded re-closing vacuum vent. Designed to be stand alone or used as a supplement to the normal vent to provide additional in-breathing capacity when required. This vent may be used singly or in multiples according to requirements.

Vacuum Set: .25 psig (1.7 kPa) to .375 psig (2.6 kPa)
Vacuum Venting Capacity: 4,000 SCFH @ 1psig

Meets requirements of 49CFR§178.345-10.

NOTE: While this vent does provide additional in-breathing capacity, it is recommended that positive vents, which will open with the emergency valve, be provided when discharging product with the manhole closed.

Part Numbers:
6234AL – Aluminum body with FKM Type A seals
6234ALB – Aluminum body with Nitrile (Buna-N™) seals
6234ALFS – Aluminum body with fluorosilicone seals
6234ALP – Aluminum body with EPDM seals

Add suffix “277” for vent with 30x30x.012 screen.

Product Details

Thru AreaCapacity at 1 PSIG
Inbreathing1.00 sq. in.4000 cu. ft. hr.
Assembly No.Body & O-Ring Holder MaterialO-Ring MaterialSpring MaterialThread SizeAWt.
6234ALAluminumVitonStnls. 316 1 5/8-121 11/164.5 oz.