... it also can cut off the upper and lower pressure to lock the gas. Thus, Commissioner Fan is the ... fine particle material. It is suitable for positive/negative pressure differential suction system, so it is always selected to ... electric, power and other sectors of the projects.Pressure Range: 1.0 bar(14.5psi), system and differential ... Material: FC, 304,316,304L, 316L Inlay Rotary valve with sight glass