dip tubeTo assemble on Manhole or tank deck. another type
adaptor valves1 Integral cast aluminum coat, anodic oxidation treatment, and changeable parts. 2 Using flatbed structure for exit to ensure liquid fully discharge
16' manholeManhole cover: Manhole assemblies should be inspected with sufficient frquency to insure Intergral Relief Valve functions properly.Any worn,damaged o
carbon steel manholeThis manhole is made up of Internal breather vavle and enmergency venting device. It can control the internal&outernal pressure automaticlyto rea
oil truck Cover1 Emergency vent relieving pressure is from 21 to 32 KPa. The Max.free air is 7000m3/h. 2 It have one or two breathing valve inside, the pressure in
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