Sanitary Ball Valve Cleanliness terminology:

1. Cleanliness, the cleanliness of the inner cavity of the sanitary ball valve, which is measured by the amount of impurities and dirt attached to the surface of the valve cavity in contact with the medium (including all internal surfaces and blind holes).

2. Cleanliness index, the allowable amount of impurities and dirt contained in the inner cavity of the measured valve.

3. Constant, the measured object is repeatedly dried and weighed to make its mass reach a constant value.

4. Turbid liquid, cleaning liquid containing impurities in the sampling area.