BF Breathers - Breathers - Hydraulic & Lubricating Filtration

Hydraulic & Lubricating / Breathers

BF High Flow
Particulate Breathers

High-capacity reservoir breathers using Donaldson Hy-Pro Dualglass pleated media. Filter airborne particulate from air entering hydraulic and lube oil reservoirs during fluid level changes.

BF Series Reservoir Breather

Product Overview

BF Breathers replace standard filler/breather caps with high-efficiency filtration designed for industrial hydraulic and lube oil systems. The Donaldson Hy-Pro Dualglass pleated media element provides high dirt-holding capacity for extended service intervals, and the integral tattle-tale vacuum gauge records maximum vacuum levels reached during operation so you know when service is due.

Donaldson Hy-Pro Dualglass pleated media for high dirt-holding capacity
Integral tattle-tale vacuum gauge records maximum vacuum levels
Heavy-duty construction for continuous pressure cycling
Multiple port connection options for flexible installation
Extended service intervals reduce maintenance downtime

Model Specifications

Model	Height	Diameter	Weight	Air Flow Capacity
BF*256	12.4 in / 31.5 cm	8.9 in / 22.6 cm	21 lb / 9.5 kg	1320 gpm / 176 cfm / 4997 lpm
BF*2511	18.1 in / 46.0 cm	8.9 in / 22.6 cm	22 lb / 10.0 kg	1450 gpm / 194 cfm / 5489 lpm
BF*2517	23.7 in / 60.2 cm	8.9 in / 22.6 cm	28 lb / 12.7 kg	1580 gpm / 211 cfm / 5981 lpm
BF*36	12.4 in / 31.5 cm	8.9 in / 22.6 cm	25 lb / 11.3 kg	1825 gpm / 244 cfm / 6908 lpm
BF*311	18.1 in / 46.0 cm	8.9 in / 22.6 cm	26 lb / 11.8 kg	2100 gpm / 281 cfm / 7949 lpm
BF*317	23.7 in / 60.2 cm	8.9 in / 22.6 cm	32 lb / 14.5 kg	2375 gpm / 317 cfm / 8990 lpm

Typical Applications

Hydraulic power units and reservoirs
Lube oil systems
Gearboxes and enclosed drives
Industrial machinery with high return flow rates

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