Ogee-Crested Weir With Pressure Measurement
Product Code : EL-EFFCA-11065
Quick answer: The ogee-crested weir with pressure measurement is a PVC spillway model for the Lab Exports experimental flume. Students use it to study overflow on a spillway profile, measure the pressure along its downstream face through tappings and 290 mm WC manometer tubes, and compare measured with theoretical discharge. Lab Exports manufactures it in Delhi for engineering colleges, polytechnics and TVET institutes.
Specifications
| Parameter | Specification |
|---|---|
| Use | Ogee-crested weir for the experimental flume |
| Weir body | PVC, with sealing lips |
| Configurations | Weir crest with chute; weir crest with chute and ski jump |
| Pressure measurement | Bores perpendicular to the weir surface, connected to manometer tubes |
| Manometer range | 290 mm WC |
| Weir with chute (L x W x H) | 172 x 84 x 160 mm |
| Weir with chute and ski jump (L x W x H) | 210 x 84 x 160 mm |
| Total weight | Approx. 4 kg |
How the ogee weir experiment is done
An ogee crest is shaped to follow the underside of the nappe that would spring from a sharp-crested weir, so the water stays in contact with the surface and the crest passes a large flow for its length. Discharge follows Q = C * L * H^1.5, where H is the head above the crest. Near the design head the pressure on the face is close to atmospheric; at higher heads it drops below atmospheric and the nappe tends to separate, which the manometer readings reveal.
- Fit the weir with the chute, or with the chute and ski jump, in the flume test section.
- Connect the pressure tappings to the manometer tubes and clear any air.
- Set a discharge and read the head over the crest once the flow is steady.
- Record the pressure head at each tapping along the downstream face.
- Repeat at several flows and plot pressure along the profile and Q against H^1.5.
Fitting the ski jump shows how a spillway throws the fast jet clear of its toe, a common way of dissipating energy away from the structure.
Key features
- Downstream profile shaped to maximise discharge over the crest
- Surface pressure bores perpendicular to the weir face, connected to manometer tubes
- Manometer tubes with a 290 mm WC measuring range
- Two layouts: crest with chute, or crest with chute and ski jump
- PVC body, 84 mm wide, with sealing lips for a tight fit in the flume
- Lets students compare theoretical and measured discharge and observe nappe separation
Documentation and supply
Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the ogee-crested weir at its works in Laxmi Nagar, Delhi, and supplies it to engineering colleges, polytechnics and TVET institutes in India and 60+ countries, handling the export documents for each shipment. More about the company is on the About Lab Exports page.
Related Experimental Flume Flow Channel Apparatus products
- Venturi Flume (EL-EFFCA-11066)
- Radial Gate (EL-EFFCA-11063)
- Sluice Gate (EL-EFFCA-11062)
- Set of Plate Weirs, Four Types (EL-EFFCA-11068)
- Experimental Flume Flow Channel Apparatus (EL-EFFCA-11061)
- Extension Element of the Experimental Flume (EL-EFFCA-11069)
The full range is in the Experimental Flume Flow Channel Apparatus section of the Engineering Lab range.
Frequently asked questions
What does the ogee-crested weir experiment measure?
It measures discharge and head over a spillway-shaped crest and the pressure distribution along its downstream face, so theoretical and measured discharge can be compared.
What is the ski jump used for?
The ski jump at the foot of the chute throws the fast jet away from the structure, showing a common spillway energy-dissipation layout.
How is the pressure on the weir face read?
Tappings drilled perpendicular to the weir surface connect to manometer tubes with a 290 mm WC range.
What is the price of the ogee-crested weir?
Prices are not published on the website. Add the ogee-crested weir to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code EL-EFFCA-11065 and the quantity, to receive a quotation.
Does Lab Exports manufacture the ogee-crested weir?
Yes. Lab Exports manufactures the ogee-crested weir at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code EL-EFFCA-11065.
Request a quote
Email [email protected] with the house code EL-EFFCA-11065 and the quantity, or add the ogee-crested weir to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
