Common Criteria

　　The following factors are very important when installing adhesive waterproof and breathable vents on the housing.

　　• Housing surface smoothness

　　• Housing surface cleaness

　　• Housing mounting surface profile

　　• Housing mounting surface energy

　　• Dwell time and Setting time after application

       Storage suggestion

　　• Should be stored indoors in a controlled environment, up to one year

　　• Recommended storage condition are 21℃ temperature and 50% RH

　　• Store in origical packaging and keep the environment clean

　　• Away from direct sunlight and hot sources

　   Installation guideline

　　• Operators should wear latex-free gloves or finger covers when handling

　　• Avoid direct contact with the effective vent zone( per FIG-below) or adhesive ring

　　• Keep all sharp or jagged objectives from ePTFE membrane

　　  Guide for removing the vents

　　• Roll core diameter is 76.2mm

　　• Vents can be removed manually or by automatic equipment

　　• Do not pry the vents from the liner to prevent damage the product

　　• For manual removal, slowly roll the vent along the edge until it’s free from the liner

　　• Vent can be removed by using blunt edged tweezers(FIG.2)

　　   Guide for installation

　　• Ensure that the temperature of the vents and housing is above 10 °C

　　• Ensure that the mounting surface of the housing is smooth and clean, free of oil stains, particles or other dirt. There are no jagged or sharp edges to prevent damage the vent

　　   Placement

　　• 100% ePTFE membrane vent can be mounted on the inner or outer surface of the housing

　　• Laminated membrane vent can only be installed on the inner surface of the housing, PTFE side facing outside (liquid)

　　• Vents should be mounted on flat, vertical surfaces where liquids or other contaminants will not pool

　　• To improve the accuracy of the placement of membrane vent, a “target area” can be marked or marked on the case requiring the membrane vent

　　• Use the target frame as a guide to install the waterproof breathable product inside the frame

　　Note: For corrosive environments, a raised target area on the ring around the installation location of the breathable product may help prevent damage to the breathable product edge.

　　  Pressing – Suitable for semi-automatic systems

　　To obtain appropriate pressure application, follow general recommendations as below:

　　• The pressing head shall be made of soft rubber with thickness at least 5.0 mm (hardness 20-40 Shore Hardness A

　　• The pressing head shall be vertical to the housing mounting surface and in a position to apply pressure to the target/guard ring

　　• According to the size of the adhesive area, apply a uniform pressure of about 2.07bar to the adhesive area of the membrane vent. The force of the pressing head should be appropriate to prevent pressure to the breathable area of the product.

　　• The dwell time of the pressing head should exceed 5 seconds

　　• Allow at leaset 24hours dwell time before using or testing

　　• These steps are necessary to ensure that the product is firmly attached to the housing

　　  Pressing – Suitable for manual installation

　　• Ensure that the entire adhesive ring is attached to the surface of the housing

　　•Gently press at least two times directly along the circumference of the adhesive ring with your finger to make the waterproof breathable product firmly bonded to the housing. Be careful not to touch the central part of the breathable area

　　• Allow at leaset 24hours dwell time before using or testing

　　• These steps are necessary to ensure that the product is firmly attached to the housing

　　  Inspection

　　• The membrane vent shall be completely located in the target frame and shall not be pressed against the wall of the frame

　　•  Once the installation is finished, the product should not be reinstalled

　　•  Damage can occur when the membrane vent is removed from the mounting surface

　　• The mounting surface can be cleaned with isopropyl alcohol

　　• Ensure that the housing mounting surface is dry before installing

　　• Usually recommended hole diameter at least 1mm

　　• Larger diameter waterproof breathable products may require the use of multiple 1 mm holes (Figure 3) *