Flochek industries offers glass lined diaphragm valves. The glass lining is done with sophisticated technology as per international standards and is highly acid and temperature resistant [325°f]. The combination of glass lined valve and ptfe diaphragm can withstand all types of acids and alkalies [highly corrosive], except hydrofluoric acid, and its working life is also much longer than synthetic rubber linings. Glass lined valves are available in sizes varying from 25 mm to 200 mm with thickness varying from 0.8 mm to 1 mm. They are electrical spark tested at high voltage up to 5,000 volts [5 kv]. Glass lining is patented under government of india patent right no 142444.