Datesheet of Milvent V a l v e One Way Valve Actual Picture Performance: ->Block ingress of wide range of contaminants,from rain and insects to dirt,dust,sand and other,particulates, ->IP 66,IP67 protection class and -40°C to +125°C ->operating temp.range.Best to use under the tough environment. ->Installing on the bottom of enclosures is effective for outdoor use. ->This valve is a one-way valve that can release pressure exhaust based on the pressure required by customer settings. Currently, this valve can be customized to set pressures ranging from 20mbar to 1bar. Open value from (20mbar,50mbar,70mbar,100mbar,150mbar,250mbar 300mbar,1bar,Customed) Part number Rule: if you need 300mbar: MIV-12DPB-300mbar Part No. Other sizes please check with us.We can OEM any sizes for you rapidly within 3days. www.milvent.com; [email protected] +8618218369198 Enviromental performance IP66.IP67(Immersion:1meters/30min.),IP68 IP69K -40°C~+125°C 85°.85%humidity-1000 hours High temperature,Hail impact test. Material: PA66 Material can be customed too: ABS PC e