Pump Test Set Workshop Lab Equipment Manufacturer, Supplier and Exporter in India

What this range covers

Eighteen pump test sets in the PTW series: centrifugal pumps in four configurations, turbine pumps, gear pumps, reciprocating pumps, series and parallel pump arrangements in five variants, multi-pump sets and an axial flow pump test set. All of them exist to do one thing - let a student measure a pump and draw its characteristic curves - and they differ in how completely they let that be done.

The names in this listing encode three different tiers of equipment, and it is worth knowing which is which before you compare prices. A unit called a demonstration unit with computer interface is fully instrumented and logs data, and suits lectures, projects and final-year work. A unit called a compact test set is bench-scale and cheaper, with fewer instruments, and suits a routine teaching laboratory running a class through a standard experiment. A unit called simply a test set is normally free-standing and full size. Three of the eighteen also carry a motor dynamometer, and that single feature changes what the rig can teach more than anything else in the range.

The Four-Quantity Rule

To report the efficiency of a pump you need four quantities measured at the same moment: flow, head, rotational speed and shaft torque. Miss any one and you are reporting something else - usually something less, under the same name. This is the rule that decides which unit to buy.

Decide which of those three statements your syllabus asks a student to produce, and buy at that level. If a laboratory report has to quote pump efficiency rather than overall efficiency, the dynamometer is not an upgrade, it is the requirement.

The computer interface: ask what happens when the computer does not

Six of these units are supplied with a computer interface, and data logging genuinely improves this experiment: readings are simultaneous rather than taken one dial at a time, curves appear as the valve is throttled, and a class can compare runs. Four questions make the difference between that and an expensive liability.

First, what the software actually does - logging only, or calculation, curve plotting and report output - and whether data exports in a plain format a spreadsheet can read. Second, the licence: how many computers, perpetual or subscription, and what an additional seat costs. Third, the system requirements, and whether the software installs on the operating system your laboratory actually runs; ask for a demonstration under those conditions. Fourth, and most important: can the rig be read and the experiment completed manually if the computer or the software fails? A rig that can only be read through a computer is unusable the day the software stops installing, and teaching equipment is expected to last far longer than a software generation. Look for real gauges and a tachometer alongside the transducers, and ask how the transducers are calibrated and by whom.

Series, parallel and the lesson that needs two pumps

Five of the eighteen units cover series and parallel operation, which is the most useful thing in this range for anyone who will work with real installations. The teaching point is simple and widely misunderstood: pumps in series add head, pumps in parallel add flow, but what you actually get is decided by the system curve, not by the pumps. Two pumps in parallel on a system dominated by friction deliver far less than twice the flow, and students who have seen that on a rig do not forget it.

For these units ask: are the two pumps matched or deliberately different, and can both arrangements be made without re-plumbing; how is the system resistance varied, and is the valve fine enough to set a point repeatably; is speed control included, and on the multi-speed and inverter-controlled units, are the inverter parameters accessible so that speed control itself can be taught, or is the inverter sealed; and how many pressure tappings there are, because a series arrangement needs the intermediate pressure to be interesting.

Cavitation, and the two pump types that must never be throttled shut

Ask of every centrifugal unit whether it can demonstrate cavitation and the suction condition that causes it, because that is the phenomenon a pump engineer is actually paid to avoid. A rig that can throttle the suction under control, with a vacuum gauge on the inlet, can show the onset of cavitation and the collapse of the head curve. Two cautions go with it: cavitation erodes impellers, so ask for the recommended run time and what the sacrificial parts cost, and expect the rig to be noisy while it happens.

And one operating rule belongs in the worksheet for the gear and reciprocating units. A positive displacement pump - gear, reciprocating, screw - must never be run against a closed discharge. A centrifugal pump that is throttled fully shut recirculates and heats up, which is bad but slow; a positive displacement pump has nowhere to put the liquid it is displacing and will raise pressure until something gives, which is fast. Ask whether the rig has a relief valve set and locked by the supplier, where it discharges to, and whether the valve arrangement makes it physically possible for a student to close the delivery completely. For the reciprocating units, ask also about the air vessel and how pulsation is damped and demonstrated, since pulsation is the characteristic of the type.

Services, room and the practical arithmetic

These rigs need water, a sump and somewhere for it to go; a floor that tolerates spillage; and space to walk around them with instruments. The motors on the full-size sets will usually be three phase, so confirm the supply at the position, the starter and overload arrangement, and the plug or terminal arrangement. Expect noise: a pump room and a lecture room are not the same room.

The arithmetic that decides the quotation is simpler than it looks. One rig serves one group at a time, an experiment with a full curve takes most of a practical session, and a class of thirty in groups of five needs six sessions or more rigs. Count that first; it is a better guide to what to buy than any specification.

Two things to know about this listing before you order

Five records are called some variation of "series and parallel pump test set", differing by the words compact, multi speed, motor dynamometer or nothing at all, and the listing does not explain what separates them. Ask for the specification sheets side by side and compare them on four things: the instruments fitted, whether there is a dynamometer, the speed control, and the footprint. All the product names in this listing are also in capital letters, which is a presentation fault on our side rather than anything about the products, and one name runs a comma straight into the next word. Quote the code and the full product name together and ask for both, with the instrument list, to be confirmed on the proforma invoice.

What to ask for on the quotation

The instrument list for each rig, naming every gauge, flow meter, tachometer, torque measurement and electrical meter fitted, and the stated accuracy of each; whether a dynamometer is included and what it measures; what the computer interface logs, its licence terms, system requirements and whether manual operation is possible; the pump type, size, speed and duty point; the range of flow and head the rig can cover, since a rig cannot test outside its own range; relief valve arrangement and setting; sump capacity and water requirement; motor voltage, frequency, phases, starter and plug arrangement; mass, footprint and packed dimensions; consumables and spares with prices - seals, bearings, impellers, gauges and filter elements; and the warranty, commissioning and local service position. For any certification stated here, contact us for the latest copies of the relevant certificates before you tender on it.

Related ranges: the turbine test set workshop for turbines rather than pumps, the hydraulics bench workshop for bench-scale fluid mechanics modules including small pump sets, the flow measurement workshop for pipe loss, flumes and flow metering, mechanical engineering trainers for machines and mechanisms, and the test and measurement workshop for instruments. The full set is listed under workshop training equipment. For a quotation, tell us the destination country, the supply and water available, the class size in one session and the syllabus or tender specification you are working to.

Frequently asked questions

What is the difference between a demonstration unit, a compact test set and a test set?

The names in this PTW series encode three tiers. A demonstration unit with computer interface is fully instrumented and logs data, and suits lectures, projects and final-year work. A compact test set is bench-scale with fewer instruments, and suits a routine teaching laboratory running a class through a standard experiment. A unit called simply a test set is normally free-standing and full size. Separately, three of the eighteen carry a motor dynamometer, and that single feature changes what a rig can teach more than anything else in the range.

Why can't I report pump efficiency from electrical input power?

Because motor losses are inside the number. A rig that measures flow, head and electrical input power gives the overall efficiency of pump and motor together, and a weak motor makes a good pump look bad. True pump efficiency needs shaft torque and speed measured at the same moment as flow and head, which is what the three dynamometer units are for; they also allow specific speed and a full set of characteristics at more than one speed. Miss any of the four quantities and you are reporting something less under the same name.

What should I check about the computer interface on the data-logging rigs?

Six units have one, and logging genuinely improves this experiment. Ask four things: what the software actually does - logging only, or calculation, curve plotting and report output - and whether data exports in a plain format a spreadsheet can read; the licence terms and how many computers it covers; the system requirements, with a demonstration on the operating system your laboratory actually runs; and, most important, whether the rig can be read and the experiment completed manually if the software fails. Look for real gauges and a tachometer alongside the transducers, and ask how the transducers are calibrated.

What should I ask about the series and parallel pump test sets?

Five records cover it, differing by the words compact, multi speed, motor dynamometer or nothing at all, so ask for their specification sheets side by side and compare instruments, dynamometer, speed control and footprint. Then ask whether the two pumps are matched or deliberately different and whether both arrangements can be made without re-plumbing; how system resistance is varied and whether the valve sets a point repeatably; whether inverter parameters are accessible or sealed; and how many pressure tappings there are, since a series arrangement needs the intermediate pressure. Series adds head, parallel adds flow, but the system curve decides the result.

Can these rigs demonstrate cavitation, and what safety rules apply?

Ask of every centrifugal unit. A rig that can throttle the suction under control, with a vacuum gauge on the inlet, can show the onset of cavitation and the collapse of the head curve - the phenomenon a pump engineer is actually paid to avoid. Cavitation erodes impellers, so ask the recommended run time and which sacrificial parts it wears, and expect noise. For the gear and reciprocating units the rule is different: a positive displacement pump must never run against a closed discharge, so ask for a relief valve set and locked by the supplier and a valve layout that cannot close the delivery fully.

How many pump rigs does a class need?

Count sessions first. One rig serves one group at a time, an experiment with a full curve takes most of a practical session, and a class of thirty in groups of five needs six sessions or more rigs. That arithmetic is a better guide to what to buy than any specification. Then check services: water, a sump and somewhere for it to go, a floor that tolerates spillage, space to walk round with instruments, and for the full-size sets usually a three-phase supply with starter and overload protection at the position. A pump room and a lecture room are not the same room.

Key takeaways

• Four quantities make efficiency - flow, head, speed and shaft torque, measured at the same moment.
• Electrical input gives overall efficiency only - motor losses hide inside it; buy a dynamometer unit if reports must quote pump efficiency.
• A rig must still work when the software does not - look for real gauges and a tachometer alongside the transducers.
• Compare the five series and parallel sets side by side on instruments, dynamometer, speed control and footprint.
• Never run a positive displacement pump against a closed discharge - insist on a locked relief valve on the gear and reciprocating units.
• Count sessions before rigs - one rig serves one group, and a full curve takes most of a practical session.

About this page

Ray Export is a manufacturer and exporter of laboratory, scientific and educational equipment based at Plot No. 449, HSIIDC Industrial Area, Saha, Ambala, Haryana 133104, India. Enquiries: [email protected], +91-9817319615.

Written by Palak Mall, Senior Content Writer. Technically reviewed by Arvind Kumar, Lab Equipment Specialist, 12+ years in laboratory and testing instrumentation. Last updated: 17 October 2026.

Specifications - instrument list and stated accuracy, dynamometer, data logging and licence terms, pump type and duty point, flow and head range, relief valve setting, sump capacity and motor supply - are confirmed in writing on the quotation. For calibration records, standards or approvals, contact us for the latest copies of the relevant certificates. No price is quoted on this page. Listing notes: five series and parallel records differ only by the words compact, multi speed, motor dynamometer or nothing, with no explanation of what separates them; all product names are in capital letters; one name runs a comma straight into the next word; and the page text does not give the individual PTW codes, so quote the full product name with the code when you enquire.