Slide Gates

These are normally used in hydro-elecric high head tunnels where a the use of a wheel or roller gate design is not practical, can be used to control the flow through the tunnel.


  • Can be used for very high heads up to 200m
  • Side groove sizes can be kept to a minimum to reduce flow disturbance.
  • Sealing faces are metal to metal slides.
  • Can be rectangular or circular bore.
  • Normally configured as Service + Guard gates for maintenance


  • High lifting loads due to excessive friction.
  • Needs large downstream air vent.