Orifice and Mouthpieces Apparatus Manufacturer,Supplier and Exporter in India
Product Code : EL-FML-10029
Jlab Export is a leading Orifice and Mouthpieces Apparatus Manufacturer,and suppliers in India
Orifice and Mouthpieces Apparatus (code EL-FML-10029) measures the coefficients of discharge, velocity and contraction for 8 mm and 10 mm orifices and four mouthpieces, each mounted in turn on a universal fixture at the side of a 0.4 x 0.3 x 0.5 m supply tank. An X–Y gauge traces the orifice jet so that Cv can be found from its path. Every orifice-and-mouthpiece unit is built by JLab in Ambala, India, and comes with a technical manual.
Specifications
| Parameter | Detail |
|---|---|
| Supply tank | 0.4 x 0.3 x 0.5 m height, with universal fixture for an orifice or mouthpiece |
| Orifices | 8 mm and 10 mm |
| Mouthpieces | L/D = 4, L/D = 1, Borda’s mouthpiece, convergent mouthpiece |
| Jet gauge | X–Y gauge for orifice jet coordinates |
| Flow measurement | Measuring tank or calibrated water flow meter |
| Pump | 0.5 HP centrifugal, with valve; by-pass valve at the pump discharge sets the head |
| Sump tank | Included |
| Services | Floor space 2 m x 1 m x 1.5 m height; 230 V, 5 A stabilised AC supply |
| Documentation | Technical manual |
| Quality check | Each orifice apparatus is visually inspected before dispatch |
| Pack quantity | Each (sold individually) |
| Minimum order quantity | 1 unit |
| Dispatch time | Usually 14–18 working days |
| Product code | EL-FML-10029 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
Three Coefficients from One Bench
With the head H over the orifice held steady by the by-pass valve, the theoretical discharge is a √(2gH), where a is the orifice area, and the measuring tank gives the actual discharge, so Cd = Qact / (a √(2gH)). The X–Y gauge reads the horizontal distance x and vertical drop y of a point on the jet; since x = vt and y = gt²/2, the actual jet velocity gives Cv = x / √(4yH). The coefficient of contraction then follows as Cc = Cd / Cv.
How the Mouthpieces Differ
A mouthpiece is a short tube fitted to a circular opening of the same size. Comparing the L/D = 1 and L/D = 4 tubes shows the effect of length: a longer tube gives the stream room to expand again after the vena contracta and run full, which lifts the discharge above that of a plain orifice. Borda’s mouthpiece projects into the tank, so water approaches from all sides and the jet contracts strongly, while the convergent mouthpiece guides the stream to its outlet with little contraction and a high Cd.
Other Discharge Measurement Apparatus
- Flow Over Weir or Open Channel Apparatus — discharge over interchangeable weirs in an open channel.
- Venturimeter and Orificemeter Calibration Set-Up — coefficient of discharge for meters in a closed pipeline.
- Study of Flow Measurement Devices — turbine meter, rotameter, orificemeter and venturimeter compared on one bench.
The Fluid Mechanics Lab group, within Fluid Mechanics and Hydraulics Lab Equipment, holds the related benches.
Request a Quote
Put the apparatus in Add To Cart or write through the contact page for a quotation, giving the quantity, the supply voltage on site and the delivery address.
Last updated: 30 October 2026
