Gate Valve 12 : Valve that permits flow in either direction when open, and prevents flow in either direction when closed. A gate valve must be operated either manually or electrically
Federal Emergency Management Agency FEMA, U.S. Department of Homeland Security DHS, Principles and Practices for the Design and Construction of Flood Resistant Building Utility Systems, Appendix B - Glossary of Terms, Washington, DC, USA 1999. www.fema.gov/pdf/fima/pbuffd_appendix_b.pdf, (ND/ Flood - Amer) {993}
