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V-NOTCH – Triangular Weir

AVAILABLE IN 22.5, 45, 60, AND 90 DEGREES
FLOWS FROM 5 TO 187 LITERS PER SECOND
SIMPLE PRINCIPLE

Triangular weirs are sharp crested thin plates with V – shape opening (or notch). These plates are designed to measure seepage water flows in channels or tanks.

 

Description

Triangular weirs are sharp crested thin plates with V-shaped opening (or notch). These plates are installed at the exit of a channel, tank, or basin in order to measure the real-time flow of water. For a given weir profile size and shape, the flow of water is related to the head of water at the weir.

Measurement can be carried out manually directly on the plate or on a staff gauge fixed to the basin wall, or remotely via a water level sensor installed in the basin at a minimum distance of the V-notch. Acoustic or vibrating wire NIVOLIC WL sensors can be used – see separate brochure for more information.

A typical application for these plates consists in measuring the flow of water on the downstream side of a dam. The seepage water flow will be diverted to an open channel in a weir-station. Seepage measurement is one of the most important indicator of  the overall performance of earth / rock – fill and concrete dams.

 

 

Specifications
Code Flow (l/sec) A (mm) B (mm) C (mm) Angle α
FR-1106050100 12 154 226 596 90o
FR-1106050100A 68 305 376 897 90o
FR-1106050100B 187 455 528 1199 90o
FR-1106050200 6.9 155 230 414 60o
FR-1106050200A 39 305 580 587 60o
FR-1106050200B 108 455 530 760 60o
FR-1106050300 5 155 230 348 45o
FR-1106050300A 28 305 380 473 45o
FR-1106050300B 78 455 530 597 45o
FR-1106050400 2.4 155 230 269 22.5o
FR-1106050400A 14 305 380 328 22.5o
FR-1106050400B 37 455 530 388 22.5o
Material  Stainless Steel 304
Thickness  3.2 mm
Ordering Info

Please specify:

  • Model (capacity)
  • Optional water level sensor with readout equipment
  • Customized plate fitting basin dimensions and onto which the v-notch plate will be screwed

 

 

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