Standard Article


Municipal Water Supply

  1. Zacharia Michael Lahlou Technical Assistance Consultant

Published Online: 15 JUL 2005

DOI: 10.1002/047147844X.mw1821

Water Encyclopedia

Water Encyclopedia

How to Cite

Lahlou, Z. M. 2005. Valves. Water Encyclopedia. 1:482–485.

Publication History

  1. Published Online: 15 JUL 2005


Valves direct, start, stop, mix, or regulate the flow, pressure, or temperature of a fluid. Valves range from simple water faucets to control valves equipped with microprocessors. Many different valve types exist; however, the most common types include gate, plug, ball, butterfly, check, pressure relief, and globe valves.


  • valve functions;
  • manual valves;
  • check valves;
  • pressure relief Valves;
  • control valves;
  • cavitation;
  • flashing;
  • choked flow;
  • water hammer