Pressure differentials in a hermetically sealed enclosure are a result of the heat generated by electrical and electronic components in the enclosure, as well as the fluctuation of the outside temperature. In the case of negative pressure or vacuum, for example, dust and humidity can enter the enclosure through the door seal.

Mounting thread with nut Torque 5 Nm (max. 10 Nm) Material stainless steel V2A (DIN 1.4305 / AISI 303) Sealing NBR gasket Filter waterproof membrane Operating/storage temperature -49 to +176ÆF (-45 to 80ÆC)

Resources

^^The 1500 WS transposition counterclockwise section for 1500 series lay-in ducts are used indoors for protection against dirt, dust and oil.