Weldon Engineers (India) · New Delhi
We design, manufacture, erect and maintain FRP cooling towers under the POLO brand, and supply ScaleOff brand non-chemical online water treatment equipment. One dedicated team from selection through to annual service.
02 · Descent
From here in, the work is on the inside.
03 · Under the shell
A tower is judged on one number: how close it holds the cold water to the ambient wet bulb. That number is decided by the fill, the distribution and the air path, none of which you can see once the casing is on.
04 · Heat transfer
Film fill spreads the water into a thin sheet across an enormous surface. Air drawn upward evaporates a small part of it, and that evaporation carries the heat away. Everything else in the tower exists to serve this one exchange.
05 · What we build
Exploded view of a POLO FRP cooling tower separating into its fan stack, fan and motor, water distribution, fill pack, casing panels and basin.
Approved by and supplying to
What we do
Most cooling problems get handed to three separate vendors: one to build the tower, one to treat the water and one to service it. We do all three, which is why our installations tend to stay at their design duty.
Inside the tower
Scroll down through a counter flow tower, from the fan that moves the air to the basin that sends the water back to your plant.
Water temperature
37°
Hot return to cold supply
Stage 01
An induced draught axial fan pulls ambient air up through the tower. The air leaves warmer and close to saturated, carrying the rejected heat with it.
Air out
Stage 02
Closely spaced blades force the leaving air to change direction several times, throwing entrained droplets back into the tower instead of onto your site.
Carryover controlled
Stage 03
A rotary sprinkler spreads hot return water evenly across the full plan area. A dry patch of fill contributes nothing, so even coverage is not a detail.
Even coverage
Stage 04
PVC film fill creates an enormous water surface inside a small volume. This is where the heat actually leaves, as a small fraction of the water evaporates.
Where heat leaves
Stage 05
Cooled water collects in the moulded FRP basin and returns to the plant. Make up water replaces only what evaporated and what left as blowdown.
Back to plant
Product range
Five product lines covering heat rejection and the water that runs through it. Every unit is engineered to order and quoted against your actual conditions.
10 years
Product guarantee
ScaleOff technology
ScaleOff converts dissolved calcium carbonate from calcite, which bonds hard to hot surfaces, into aragonite, which stays suspended and passes through the system. The water chemistry is otherwise unchanged, so the supply stays fit for drinking and for food contact duty.
Project references
A selection from our project record, with the duty each was built for. Site references available on request.
400 TRInstitutional
Kundli, Haryana
A three cell counter flow tower serving the campus chiller plant at the National Institute of Food Technology, Entrepreneurship and Management. Blue header pipework runs beneath the raised tower base into the plant room.
600 TRBeverage and distillery
Samba, Jammu
Four counter flow cells on a shared basin, each with an independent fan stack and a common access ladder, handling condenser duty for the production plant at Samba.
100 TRBeverage bottling
Saha, Haryana
A single square cell serving the bottling line utilities, with a second tower alongside for future expansion and spare PVC fill stacked ready on site.
Twin tower installationPlastics and polymers
Jaipur, Rajasthan
A green bottle tower and a blue rectangular unit installed together on the works terrace, giving the plant redundancy across two independent cooling circuits.
Multi cell installationProcess industry
Visakhapatnam, Andhra Pradesh
A row of matched cells erected on a new plinth during plant construction, documented in the published company profile of our founder.
Inline conditionerAgriculture and irrigation
Jaipur, Rajasthan
A ScaleOff inline conditioner fitted to the pumped irrigation header, protecting emitters and pipework from limescale without salt or dosing.
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Why Weldon
Most suppliers can quote a tower. The differences show up two years later, in whether the unit still holds its approach and whether anyone answers the phone.
Design, manufacture, erection, commissioning and maintenance are all handled in house, so there is nobody to point at when something needs resolving.
PAN India Military Engineering Services approval, plus CPWD, PWD, DRDO, BHEL and Airports Authority of India registration for government and defence tenders.
Selections are calculated from your heat load and site wet bulb, not scaled from a catalogue table, so the tower holds its approach in service.
FRP shells and PVC internals do not rot or rust, which is why our towers outlast timber and mild steel units in aggressive water.
ScaleOff conditioning protects heat transfer surfaces with no dosing, no salt, no power and nothing for your maintenance team to manage.
Our spares and maintenance work covers towers we did not build, so a single contractor can look after the whole site.
Industries served
Every sector puts a different demand on a cooling circuit. Some need a very close approach, some need to survive aggressive water, and some simply cannot stop for maintenance during a season.
Podcast
Our founder sat down with the VMITR podcast for a long conversation about how Weldon Engineers started, what the first years actually cost, and how a manufacturing business of this size ends up on approval lists like the Military Engineering Services.
Insights
Practical guidance on selection, water chemistry and maintenance, with the trade-offs stated rather than glossed over.
Tower selection comes down to four numbers. Get them right and the quote you receive is comparable across suppliers. Get them wrong and you buy the wrong tower twice.
9 min read
The two arrangements move air through water in different directions, and that single difference cascades into pump sizing, plot area, maintenance access and cost.
7 min readHow a cooling tower actually rejects heat, what separates counter flow from cross flow, what every component does, and the maintenance that keeps a tower at its design approach temperature.
8 min readCommon questions
If your question is not here, call and ask. You will reach someone who can answer it.
Tower selection depends on four numbers: the heat load in tons of refrigeration or kilocalories per hour, the circulating water flow rate, the range between hot and cold water temperatures, and the design wet bulb temperature at your site. Send us those and we will return a sized selection. If you do not have them, our engineers can work them back from your chiller or process data.
The FRP shell itself does not rot or corrode and will typically remain serviceable for well over fifteen years. Wear parts have shorter lives: PVC fill generally needs renewal every five to eight years depending on water quality, and drive belts, bearings and nozzles are routine maintenance items.
No. ScaleOff works catalytically, converting dissolved calcium carbonate from calcite into aragonite so it stays in suspension instead of bonding to hot surfaces. It uses no magnets, no electricity, no salt and no chemicals, which is why it carries a ten year guarantee and needs no servicing.
Yes. We carry fills, drift eliminators, nozzles, fan blades, motors, gearboxes and float valves for towers of any make, and our crews fit them during planned shutdowns. Most underperforming towers can be brought back to rated duty for a fraction of replacement cost.
Yes. We hold PAN India approval from the Military Engineering Services, and we are registered with CPWD, PWD, DRDO, BHEL, the Airports Authority of India and NBCC. We can supply the documentation your tender process requires.
We supply and erect across India from our New Delhi base, with installations documented in Haryana, Rajasthan, Jammu and Andhra Pradesh among others. We have also exported engineered cooling systems to the United States and Brazil.
Next step
Send your heat load, flow rate and site conditions, or simply describe the problem. An engineer will come back with a sized selection and a budget figure, not a brochure.
Speak to an engineer
+91 99585 27775Sales · quotations and new enquiries
+91 98681 45099Supportweldonengg@gmail.comMonday to Saturday, 09:30 to 18:30. Enquiries from outside India are welcome.
