Uses: Stainless steel normal pressure manhole sealing ring;

can be used for flanged storage tanks, buckets with flanged mouths, etc.

as seals.

Material: hygienic food-grade silicone rubber.

About the size:

For example, DN300, not the diameter of the seal ring is 300MM,

DN300 is matched with the DN300 atmospheric pressure manhole.

The seal ring is actually slightly smaller than 300

(the diameter of the seal groove position is about 290),

so that it can be stuck with the good Manholes are not easy to fall off.