ET-8xG-MIL_manual.r08 Page 13 of 14
Last Revised: 24-Apr-15
Red Lion
Controls
20 Willow Springs Circle
York, PA 17406
USA
1-717-767-6511
Section 5
Pressure Vent
Pressure
Vent
Without a pressure ventilation system the pressure differential that can occur due to
temperature or altitude changes can result in condensation. To prevent this, the switch
incorporates a pressure vent that adjusts the internal air pressure to match the
surrounding (external) pressure. At the same time the vent is IP67 rated and will not let
moisture into the switch.
Characteristics of the Pressure vent
Air flow rate:
0,4 l/min at 0,1 bar ΔP to 5,0 l/min at 1 bar ΔP
Point of water entry:
1,5 bar
Temperature resistance:
–40°C to +120°C (in assembled state)
Pressure Vent
