D                           H                            
400.0                   120                        
430.0                   120                        
450.0                   120
500.0                   120
600.0                   120
Application
Pressure type manhole cover series are major use to the pressure tank of food,wine-producing,beverage and pharmacy industries and so on.
Technical date
Max.working pressure:5 bar
Working negative pressure:full vacuum
Range of temprature:-10 deg to 250 deg