Pressure Compensation Device
DA 284 | IP66

  • High degree of protection
  • Waterproof membrane
  • Easy to install

Pressure differentials in enclosures with a high degree of protection are a result of internal and external temperature changes. In the case of negative pressure or partical vacuum, dust and humidity can enter the enclosure through the door seal. When the air inside the enclosure cools down, condensation may occur because the humidity cannot escape the enclosure. The easy-to-install pressure compensation device DA 284 provides compensation of pressure at a protection degree of IP66. Even with a slight overpressure, a waterproof membrane inside the plug allows the humidity to escape whilst blocking water and dirt from entering the enclosure.

Technical details

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Mountingthread M40 x 1.5 with nut
Torque5Nm (max. 10Nm)
Depth in enclosureapprox. 16mm
Sealingsealing gasket NBR
Filterwaterproof membrane
Air permeability1200l/h at a pressure difference of min. 70mbar
DimensionsØ 60 x 37mm
Fitting positionvariable

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Make cut-out Ø 40.5+0,5mm in enclosure wall and mount pressure compensation device with nut. Please make sure that the sealing gasket is put in place on the outer side panel of the enclosure. For optimal pressure compensation we recommend to use two devices on opposite sides towards the top of the enclosure.

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Art. No.MaterialProtection typeOperating/
Storage temperature
1 packing unitWeight (approx.)Approvals
28400.0-00plastic, light greyIP66 (EN 60529) /
IPX9K (EN 40050-9)
-35 to +70°C
(-31 to +158°F)
2 pieces90g (45g/piece)-EAC
28400.0-01plastic, light greyIP66 (EN 60529) /
IPX9K (EN 40050-9)
-35 to +70°C
(-31 to +158°F)
1 piece45g-EAC
28405.0-00plastic according to UL94 V-0, light grey;
weather proof and UV light resistant according to UL746C (f1)

IP66 (EN 60529) /
IPX9K (EN 40050-9)

-45 to +70°C
(-49 to +158°F)
2 pieces120g (60g/piece)UL File No. E234324EAC

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Technical drawing

Pressure compensation Device DA 284

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