SS304 Sanitary Stainless Steel Square Manhole Cover  

SS304 Sanitary Stainless Steel Square Manhole Cover   Product Description Product name: Sanitary  Stainless  Steel  Manhole cover  Application  Pressure type manhole cover series are major use to the pressure tank of food, wine-producing, beverage and pharmacy industries and so on.  Working Principle  When need repair the storage tank, first to unscrew the handwheel (use to fixed manhole cover and supply the force to axial seal ), then open the manhole cover by the handle which fixed in the manhole cover (manhole cover is jointed together by hinger and frame, to ensure accurately closure when the manhole cover close, and the hinge can let the opened manhole cover stop above 30 degree angle of upright position), thus the serviceman can check the storage tank; When the manhole cover closed, both of the seal of manhole cover and the tank can ensure complete sealing, so, we can avoid leakage of the…