what is pressure manhole

Pressure manhole, as the name implies in the use of the process to meet the use of pressure and surface mirror treatment.Normally, the design pressure is 0.3MPA-1.0MPA.General size: diameter 150-600mm. Pressure manhole is also known as quick opening manhole, the way of opening is convenient, high security and beautiful and practical appearance.Mainly for convenience.A piece of equipment that personnel work in and out of the tank and overhaul.In order to meet the pressure requirements and sealing performance, the upper and lower flanges are welded at the manhole barrel joint and the lid link, and the upper and lower pieces of bolts are screwed tight.

The pressure manhole is mainly made of stainless steel, such as 304/316/316l.Usually mainly installed in dairy products, wine, beer, beverages, biological engineering and other industrial areas of large cans and containers.Because the application site of the pressure bearing force is very high requirements, so for the pressure manhole of the stainless steel plate selection and thickness and pressure manhole itself strength and sealing requirements are the key to the technology.In order to prevent the leakage of the tank, the installation of the pressure manhole must be strict requirements, the upper and lower two flange joint surface must ensure its flatness, pressure manhole seal ring is usually purchased: silicone rubber and fluorine rubber.