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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

 6.35 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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