Learn about our Jet Flow Gates

Jet Flow Gates are used as regulating gates to provide controlled discharge on outlet and bypass structures. They are most commonly installed for free discharge in the horizontal direction, but some are set at a downward angle or below tailwater for submerged discharge. The Jet Flow Gate is like a bonneted slide gate in appearance but includes a circular floating seat ring. The seat ring, or seal ring, is a tapered orifice and the primary design feature that contracts flow through the gate body and jet flow gate valve to safely discharge downstream. The contracting flow allows air to be introduced without cavitation or vibration.

A sliding gate leaf controls the opening and flow rate. The Jet Flow Gate can be throttled at any position including small openings under high head pressure. The ability to safely regulate flow and trouble-free performance records make the Jet Flow Gate an excellent choice for outlet works.

Steel-Fab has developed the capability to install a Jet Flow Gate within a larger Roller Gate. This arrangement allows controlled minimum flow to be provided without constructing a separate bypass structure.


Tempe Town Lake Dam

Steel Fab designed and supplied eight hydraulically operated steel crest gates with hydraulic operating system in 2016 for the Tempe Town Lake Dam Replacement in Tempe Arizona. Each gate...

Post Falls Hydroelectric Development

Since 2012 Steel Fab has designed and manufactured twelve electrically operated roller gates with wire rope drum hoists for Avista Corporation, Spokane Washington, formerly Washington Water Power, at their...

Thornton Composite Reservoir

Steel Fab designed and manufactured four 12’- 6” wide x 28’ tall hydraulically operated stainless steel roller gates with hydraulic operating systems for the Thornton Composite Reservoir Project completed...

Other Gates

Crest Gates

Roller Gates

Slide Gates

Tainter Gates

Bulkhead Gates

Floating Bulkhead Gates

Broome Gates

Miter Gates