1.the exhibition type feeding valve applicable medium such as water, acetone, alcohol, ammonia, barium carbonate, benzene (WCB material with lowest temperature for - 29 ℃, the highest temperature is 425 ℃.)
2.using media such as grain, oil, pulp, carbon dioxide, gas (stainless minimum temperature to - 100 ℃, the highest temperature is 232 ℃.)
3.it is forbidden to use fluoride ion liquid (such as HF) nor use strong alkali and phosphoric acid concentration (> 150 ℃ temperature > 30%).