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Two Stage (Series And parallel)
The Two Stage (Series And parallel) apparatus (Product Code: SLE/EFM/08) is a two-pump centrifugal test rig in which students run each pump alone, or both together in series or in parallel, and measure how the combined system behaves. Each pump has its own motor, speed control, torque load cell and speed sensor, and flow is found from the differential pressure across a Venturi meter. It is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, and forms part of our engineering lab equipment for India’s mechanical and civil engineering departments.
Specifications
| Parameter | Detail |
|---|---|
| Pumps | Two centrifugal pumps, working alone, in series or in parallel |
| Drive | Two bearing-mounted motors, one driving each pump independently |
| Per-pump instrumentation | Electronic Motor Drive for speed control, load cell for torque, sensor for pump speed |
| Configuration | Two-way valve selects single, parallel or series operation; each pump has its own inlet valve |
| Water circuit | Integral reservoir → strainers → series of valves → Venturi meter → back to reservoir for re-use |
| Flow measurement | Differential pressure across the Venturi meter |
| Layout | Instrument and control modules fit into a frame above and behind the pumps |
Typical Use
Students usually begin with one pump, plotting head, power and efficiency against flow. They then switch the two-way valve to series and see the heads add at a given flow, before changing to parallel and seeing the flows add at a given head — the two classic results every engineer needs when designing a pumping station or booster system. Because each motor has its own speed control and torque measurement, the pumps can also be run at different speeds to show what happens when mismatched machines share a system.
Closing an inlet valve progressively lets the class see cavitation begin and hear the change in pump noise, giving a vivid lesson in suction conditions. The same rig teaches flow measurement: students convert the Venturi differential pressure into flow rate and compare the result with theory. Since water returns to the reservoir for re-use, water consumption stays low, which makes the rig well suited as lab equipment for college buildings without large drainage facilities. Clean the strainers regularly and refill the reservoir with clean water.
Manufacturer
Jain Scientific Equipments Private Limited, the Ambala, Haryana company behind the ScienceLab brand, makes this rig for teaching laboratories. Its corporate identity number is CIN U29309HR2020PTC087597, and apparatus is produced at the licensed works at 449, HSIIDC Industrial Area, Saha, Ambala, under Factory Licence AMB-ONLINE-CHD-J-414. See our company profile for further details.
Related Fluid Mechanics Equipment
Apparatus that extends the pump, cavitation and Venturi topics covered by this rig:
- Variable Speed Series And Parallel Pumps — an alternative rig for series and parallel pump studies
- Cavitation In Venturi — a closer look at the cavitation students observe here
- Bernoulli’s Theorem — the principle behind Venturi flow measurement
- Axial Flow Pump Module — compares centrifugal and axial flow pump characteristics
Explore the full Fluid Mechanics range.
Frequently Asked Questions
Can the pumps be tested individually?
Yes. Each pump can work alone, and a two-way valve switches the system to series or parallel operation.
How is flow rate measured?
From the differential pressure across the Venturi meter in the delivery line.
Can the two pumps run at different speeds?
Yes. Each is driven by its own bearing-mounted motor with an electronic Motor Drive, a torque load cell and a speed sensor.
Does it need a mains water connection?
The pumps draw from an integral reservoir and the water returns to it for re-use. Please contact us for filling and electrical requirements.
Can students observe cavitation?
Yes. The rig is designed to let students see cavitation as well as study Venturi flow measurement.
What are the footprint and pump ratings?
These are not listed on this page; our team can supply them with a quotation.
What information do you need for an institutional quote?
Quantity, delivery address, electrical supply and any tender reference. We supply across India and to international markets.
Request a Quote
To receive pricing for the Two Stage (Series And parallel) rig, contact us or place it in the enquiry cart along with other apparatus for your hydraulics laboratory.
Last updated: 24 September 2026
