Closed Circuit Apparatus Manufacturer,Supplier and Exporter in India
Product Code : EL-HLE-8987
Jlab Export is a leading Closed Circuit Apparatus Manufacturer,and suppliers in India
Closed Circuit Apparatus (code EL-HLE-8987) is a recirculating flow bench with two G.I. pipelines, each fitted with a 25 mm venturi meter, a 25 mm orifice meter and a gate valve. Distribution chambers with isolating cocks let each meter be tested on its own, and a 0.5 HP single-phase pump set supplies water from the sump. This two-line venturi and orifice meter bench is built by JLab in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Pipelines | Two G.I. pipelines |
| Meters on each line | Venturi meter and orifice meter, 25 mm, with gate valve |
| Distribution chambers | Set with isolating cocks, for testing each venturi meter or orifice meter on its own |
| Supply pump set | 0.5 HP, single phase, drawing water from the sump |
| Control valve | Gun metal gate valve |
| Services required | Single phase 200/220 V supply; water to fill the sump tank |
| Quality check | Each 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-HLE-8987 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
Calibrating the Venturi and Orifice Meters
Water from the pump set, regulated by the gun metal gate valve, passes through the selected meter, and the pressure difference across it, expressed as a head h of water, gives the theoretical discharge Qth = A1A2√(2gh)/√(A1² − A2²). Dividing the actual discharge by Qth gives the coefficient of discharge Cd of that meter. The smooth converging cone of a venturi meter loses little energy before the throat, so its Cd lies close to one, and its diverging cone recovers most of the pressure; an orifice plate forms a vena contracta and eddies, so its Cd is much lower and its permanent pressure loss larger.
How It Differs From the Other Closed Circuit Apparatus
A second Closed Circuit Apparatus has the same 0.5 HP single-phase pump set and gun metal gate valve, but it is used to find the coefficients of discharge, contraction and velocity of orifices. This unit measures flow inside pipes instead, through venturi and orifice meters on two G.I. lines.
Other Venturi, Orifice and Discharge Benches
- Closed Circuit Apparatus — same name; finds Cd, Cc and Cv of orifices with a 0.5 HP pump.
- Venturimeter and Orificemeter Calibration Set-Up — parallel venturi and orifice lines read on a differential manometer.
- Discharge Through Venturimeter and Orificemeter — two lines from a common manifold, with flow control and bypass valves.
More flow-measurement benches are grouped in Hydrology Lab Equipments under Mechanical Engineering Lab Equipment.
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Last updated: 30 October 2026
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