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The material types of sanitary manhole seals mainly include silicone rubber, fluororubber, EPDM rubber, etc. These materials each have their own characteristics and application scenarios:
Silicone rubber: It has the characteristics of oil resistance, aging resistance, and wear resistance, with stable performance, beautiful appearance, and excellent internal quality.
Fluororubber: can withstand high temperature environments, maintain good sealing effect, and is commonly used in situations that require high temperature environments.
EPDM rubber: It has good weather resistance and chemical corrosion resistance, and is suitable for various industrial environments.
There are various styles of sanitary manhole seals, including:

Rectangular manhole sealing ring: suitable for sealing rectangular manholes, with a size of 450 * 450mm, a milky white color, and made of sanitary grade silicone.
Circular manhole sanitary grade rubber ring: with a diameter of DN150-700, made of silicone rubber. Among them, circular manholes and socket type are suitable for the top of straight edges. The sealing ring of the pressure manhole is a DN150-600 square strip with a cross-section of 8 * 8
These materials and styles of manhole seals are widely used in various industrial fields, such as biopharmaceuticals, beverages and food, aerospace, petrochemicals and other high-tech industries