Rising Film Evaporator
Product Code : LSK-TWL-10808
Rising Film Evaporator (SKU LSK-TWL-10808), also called a vertical long tube evaporator, is a teaching unit for studying how a liquid is concentrated as it boils and climbs as a thin film inside heated tubes. It shows the thermo-siphon principle used in industrial evaporators and reboilers. Chemical engineering heat transfer and unit operations labs use it. Science Lab Supplies manufactures it at its factory at Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, and sells it direct to colleges, tender contractors and distributors.
Specifications
The evaporator is essentially a vertical shell and tube heat exchanger. Feed enters the bottom of the heating tubes, starts to boil, and the rising vapour carries the liquid upward in co-current flow, pressing it as a thin, turbulent film against the tube walls until the concentrate and vapour leave at the top.
| Parameter | Value |
|---|---|
| SKU | LSK-TWL-10808 |
| Type | Rising film (vertical long tube) evaporator |
| Construction principle | Vertical shell and tube heat exchanger |
| Operating principle | Thermo-siphon; liquid and vapour flow upward in parallel |
| Feed entry | Bottom of the heating tubes |
| Film behaviour | Thin film on the tube walls with high turbulence |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Rising Film Evaporator
The unit is used to show how evaporation concentrates a solution and why a rising film suits viscous or fouling products. Students observe that a fairly high temperature difference between heating and boiling sides is needed to drive the film, and relate this to industrial uses from reboilers to solvent recovery.
- B.Tech/B.E. chemical engineering heat transfer lab: operation of a rising film evaporator.
- Effect of heating-side temperature difference on film formation and concentration.
- Product recirculation to maintain liquid loading in the tubes.
- Process-industry context: effluent treatment, food, pharmaceuticals, desalination and solvent recovery.
Evaporators run with hot surfaces and vapour, so operate the unit under supervision and let it cool before handling tubes or fittings.
Standard Scope of Supply
The Rising Film Evaporator is supplied as a single unit as described above; any optional accessories are listed on the quotation. Tell us the solutions you plan to concentrate and the heating medium available in your laboratory, so the quotation matches your experiments.
Packing, MOQ and Lead Time
You can request a quotation for one evaporator or for a full heat transfer lab. Each quotation from Science Lab Supplies states the packing, delivery time and price for the quantity requested, and related heat transfer trainers can go on the same quotation when you source engineering lab equipment in India.
As a registered exporter with an Importer-Exporter Code, Science Lab Supplies can ship to buyers in the UAE, Saudi Arabia, Oman, the Philippines, Nepal and Bangladesh. Enquire through the contact page or the enquiry cart, and use the lab tender page for tender supply.
Frequently Asked Questions
How does a rising film evaporator work?
Feed boils inside vertical heated tubes, and the vapour drives the liquid upward as a thin, turbulent film on the tube walls, concentrating it as it rises.
Which products suit this type of evaporator?
Rising film evaporators suit highly viscous products and products that tend to foul heating surfaces, because the co-current upward flow keeps the liquid film turbulent.
Is Science Lab Supplies the manufacturer or a trader?
Science Lab Supplies is the manufacturer. The evaporator is built at its own factory in Saha, Ambala, India, and quotations come directly from the factory.
Where are rising film evaporators used in industry?
They are mainly used as reboilers for distillation columns, pre-concentrators, flash evaporators and pre-heaters, in fields such as effluent treatment, polymers, food, thermal desalination, pharmaceuticals and solvent recovery.
Related Heat Transfer and Process Trainers
These four units from the same range sit well beside an evaporator in a heat transfer and process lab. They cover thermal processing of liquids, coiled-tube flow, chilled water and extraction, linking evaporation with other food and chemical plant operations.
- Laboratory Pasteuriser — plate heat exchanger for liquid products.
- Flow Through Helical Coil — flow in coiled tubes.
- Chiller Water Bath — chilled water for cooling studies.
- Solid Liquid Extraction Unit — extraction ahead of concentration.
Browse the full Training Workshop Labs range or all TVET lab equipment.
Last updated: 25 September 2026
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