Self opening air inlet LSFR

for ventilation

Product name
LSFR

Short description

• Breather plug with tube for gearbox ventilation

Detailed description
Brass breather plug and aluminium level indicator tube with a specially designed internal valve calibrated to 0.15 ÷ 0.30 bar. The valve opens intermittently to vent internal pressures generated by fluid turbulence. Recommended for use on high-rpm gearboxes and speed-change units. Supplied without external seal.

Operating conditions
Operating temperature: -20°C to +100°C.

Available on request

• Nickel-plating treatment
• Different valve calibrations
• Aluminum alloy version

Important note
The product is not designed to operate in an inverted position. Installation or testing in this configuration does not comply with the design specifications and may compromise the device's proper operation.

Technical Info - GAS ISO 228
CODE | THREAD | d | h | f | l | g | e | s | WEIGHT (g)
1GLSR10O | 1/4" | 16.5 | 17 | 8 | 120 | 6 | 17 | 19 | 36
1GLSR20O | 3/8" | 21 | 19 | 8 | 170 | 6 | 22 | 24.5 | 52
1GLSR30O | 1/2" | 21 | 22 | 10 | 170 | 6 | 24 | 26.8 | 73
1GLSR40O | 3/4" | 30 | 24 | 12 | 200 | 10 | 32 | 36 |
1GLSR50O | 1" | 30 | 29 | 14 | 200 | 10 | 40 | 44.5 |

Technical Info - MB METRIC
CODE | THREAD | d | h | f | l | g | e | s | WEIGHT (g)
1MLSR10O | 14 x 1,5 | 16.5 | 17 | 8 | 120 | 6 | 17 | 19 |
1MLSR20O | 16 x 1,5 | 21 | 19 | 8 | 170 | 6 | 22 | 24.5 |
1MLSR30O | 18 x 1,5 | 21 | 19 | 8 | 170 | 6 | 22 | 24.5 |
1MLSR40O | 20 x 1,5 | 21 | 22 | 10 | 170 | 6 | 24 | 26.8 |
1MLSR50O | 22 x 1,5 | 21 | 22 | 10 | 170 | 6 | 27 | 30.5 |

Technical specifications

• Type: Breather plug with tube
• Materials: Brass body; aluminium level indicator tube (other alloys on request)
• Internal valve calibration: 0.15 ÷ 0.30 bar
• Function: Intermittent venting of internal pressures caused by fluid turbulence
• Recommended application: High-rpm gearboxes and speed-change units
• Supplied without external seal
• Operating temperature range: -20°C to +100°C
• Options on request: nickel plating, different calibrations, aluminum alloy construction
• Installation note: Not designed to operate inverted; testing or installation in this position is not compliant with design specifications
• Available sizes/codes and dimensional data: see Technical Info - GAS ISO 228 and Technical Info - MB METRIC above