Periodic Table - Forum - Chemistry Dictionary - Chemistry Tools - Resources - Link to Us

Search by name or symbol:

Definition of vacuum valve

  1. a shutoff valve that, when open, connects the system to a pressure less than atmospheric pressure. [SEMI Chemicals/Gases, Vol. 1, 1990 (no longer in print)]
chemicool.com © 2008 | About | Contact | Privacy | Science network | Biology | Equations |