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.

Advantages

• 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

Disadvantages

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