The lower weep hole exists to allow fluid to collect or drain out of the water pump to protect the bearing integrity. In a horizontal centrifugal pump there is little space between the bearing and the seal so fluid build-up could potentially threaten the bearing.
Definition of PETRI DISH. 1. : a small shallow dish of thin glass or plastic with a loose cover used especially for cultures in bacteriology.2. ADVERTISEMENT.Julius R. Petri â 1921 German bacteriologist.. : a small shallow dish of thin glass or plastic with a loose cover used especially for cultures in bacteriology. 2. ADVERTISEMENT. Julius R. Petri â 1921 German bacteriologist.
A shallow, circular, transparent dish with a flat lid, used for the culture of microorganisms. Example sentences. 1  Five pieces of embryogenic tissue were cultured in Petri dishes containing 35 ml maturation medium.2  Twenty fresh anthers were selected from ten plants at random; ten were kept on dry blotting paper in Petri dishes and the other ten were kept in Petri dishes containing water-saturated blotting paper. shallow, circular, transparent dish with a flat lid, used for the culture of microorganisms. Example sentences. 1  Five pieces of embryogenic tissue were cultured in Petri dishes containing 35 ml maturation medium.