Lab-Crest compact, 1/4-turn, full port, glass ball valves are ideal for food, pharmaceutical and other process applications where product contamination is a concern. Since wetted parts are made from chemically resistant borosilicate glass, alumina ceramic and TFE, ball valves are effective in both high purity applications and in environments where corrosive chemicals or gases are present. Valves are effective in temperatures up to 490°C and pressures to 100 PSIG. Andrews Glass Co. 3740 N. West Blvd. Vineland, NJ, 08360-1653