Standard_Parts_Catalogue

Page 1626 | 3.5 Controlling, Venting, Sealing of Liquids and Gases GN 7404 Two-Way Breathable Membranes Oil Repellent (Oleophobic) / Water Repellent (Hydrophobic) 1 Material 2 d 1 3 Membrane pore size How to order 1 2 3 GN7404-AL-G1- 1,2 2 3 d 1 d 2 d 3 l 1 l 2 s Membrane pore size in µm Differential pressure Δ 1 bar  Air permeability volume in l/min G 1 ⁄ 2 M 20 x 1,5 26 10  8,5 7,5 23 1,2 11 G 3 ⁄ 4 M 26 x 1,5 32 14  9   8   30 1,2 21 G 1 M 33 x 1,5 40 20 11   8,5 36 1,2 34 Two-way breathable membranes GN 7404 are used when constructing housings and equipment. When installed in the wall of a housing, they can be used to equalize the pressure between the interior of the housing and the surrounding area. Any dirt, dust, oil, or water in the gaseous medium is kept out. This pre- vents dirt and moisture from entering the interior of the housing and pre- vents oil from dripping into the surrounding area. In order to protect the membranes, they should not be completely co- vered with oil or water, and the differential pressure/air permeability volume should not be exceeded. They should be installed on the side/ vertically in a protected position. The external Ø of the housing with the recessed hexagon is designed for tapped plates for DIN 3852 tube fittings. The seal is embedded in a recess on the planar side. This prevents it from being lost and squeezed outwards during the tightening process. Assembly instruction: For mounting on walls of less than 4 mm thickness please use mounting nuts GN 7430. see also... • Breather Strainers GN 7403 → Page 1630 Information • Body - - Aluminum AL - - Stainless steel AISI 303 NI • Membrane Non-woven nylon material / Acrylic copolymer wetting • Membrane enclosure Plastic (Polyamide PA) - - Glass fiber reinforced - - Temperature resistant up to 100 °C • Protective strainer Stainless steel AISI 304 • Seal / O-ring Rubber NBR (Perbunan ® ) • Elastomer Characteristics → Page 2158 • Plastic Characteristics → Page 2158 • Stainless Steel Characteristics → Page 2166 • RoHS Specification 1 • Mounting Nuts GN 7430 → Page 1632 Accessory • Body in brass MS • Other membrane pore size On request