Outer Diameter: 20″
Blinding Hole Design
Blinding Hole is in the main plate of manhole cover can be ordered by user’s requirements and can be installed with Vapor Vent Valve, Optic Sensor, Pressure Gauge, Dip Tube and External P/V vent.
The main cover is made by plate punch forming, and the outer diameter can be ordered by user’s demand.
The hooped type installment mode is instead of traditional flanged type, it is more convenient and reliable to install.