A plate-fin heat exchanger is a type of heat exchanger design that uses plates and finned chambers to transfer heat between fluids. It is often categorized as a compact heat exchanger to emphasise its relatively high heat transfer surface area to volume ratio. The delicate design as well as the thin channels in the plate-fin heat exchanger make cleaning difficult or impossible. 

The plate-fin heat exchanger is widely used in many industries, including the aerospace industry for its compact size and lightweight properties, as well as in cryogenics where its ability to facilitate heat transfer with small temperature differences is utilized.Plate-fin heat exchangers are generally applied in industries where the fluids have little chances of fouling.

Copper heat exchangers are more efficient than shell and tube exchangers for low flow rates. Due to their simple construction they are low in price and easy to clean on the shell side. 

These copper heat exchanger tubes are normally supplied in straight length in annealed & half hard temper. Copper tubes are artificial to special requirements as to dimensional tolerances, finish and tempers for use in condensers and heat exchangers.

The copper tubes shaped by are metal industries not only have the stiff tolerances but also have the most dependable dimensions throughout the tube length. The tube surface is clean both inside and outside with no caustic stains. 

The copper tubes produced by are metal industries are suitable to transfer heat in a wide variety of operating conditions and to refuse to accept decay for the longest period of time possible under the harshest operating circumstances.

Coils are made in different diameters using tubes of different bores. 

Their thermal efficiency approximates that of a true countercurrent flow type exchanger. Condenserors are used for condensation of vapours and cooling of liquids. Condensers are made by fusing number of parallel coils in a glass shell.

Air cooled Heat Exchangers (or) Fin fan Cooler or Air Fin Cooler are the same Air Cooling equipment. In some part of the world Air Cooled Heat Exchangers are also known as Air Fin Cooler. Simply says Air Fin cooler, Fin Fan cooler, Coil Cooler, Dry Cooling Tower are the other names of Air Cooled Heat Exchangers. It also used for Heat rejecting from a hot process fluid to the surrounding atmosphere by using the atmospheric air as a cooling media.

The Air Fin Coolers are basically designed with multiple rows of finned tubes in a series of surface and required numbers of fans are used to move the low temperature atmospheric ambient air over the finned tube coil surface in order to cool the hotter fluid media. It is nothing but an extended type of industrial or automotive radiators. The finned tube bundles are modular construction for easy transportation. The various types of headers are Welded Bonnet Header, Plug Header, Manifold header, Plug and pipe header etc.,
The various types of Fins are 'L' type Wrap-On Fins, 'G' type Embedded Fins and Bi-metallic Extruded Fins etc.,. In some small type heat Exchanger wire/ strip type copper wounded / knurled Fins are also used. Other than finned tube bundle and headers, Axial flow fans and drives etc are used as per the Cooler requirement.

These Air Cooled Type Heat Exchangers are used in oil, gas, petrochemical, refinery, power and condensation plants. All type of fluids in process industries are cooled in Air Fin Coolers with the use of atmospheric air, as the cooling media which resulting in economy in running costs.

Our Air Cooled Heat Exchangers are used for high pressure, high temperature applications in process industries with metallurgy suitable for highly corrosive fluid medias.

Shell and Tube Heat Exchanger are classified into fixed & floating type Heat Exchangers. Fixed type Heat Exchangers are used where there are absolutely no chances for inter mixing of two fluids. 

In this type, the tube sheets are completely welded to the shell and acted as shell flanges. The Floating type Heat Exchangers has the advantages of removability of tube bundle and access for cleaning both inner and outer side of tubes and shell.

United Finned Tube Heat Exchangers are a special European technology in which continues wire or strip of fin material is wounded spirally on the tubes and strengthened to withstandard higher internal pressure comparing with radiation type. 

Our range of finned tube heat exchangers are built on specialized European technology that helps our products to with stand higher internal pressure. Finned Heat Exchangers are having more heat transfer area, which is allowed to improve the efficiency. 

MATERIALS: Tubes, Tube sheets, shells, Baffles and Fins of Heat Exchanger are made out of various custom required material & TEMA Standards like seamless or ERW tubes and shells in Copper Aluminium, Brass, mild steel, cupro Nickel, Aluminium brass and stainless steel, carbon steel, admiralty Brass materials are used. The end of the tubes are probably welded or expanded with grooved tube plates by tube expanding machines up to a pressure level of 1000 PS1 Pressure. 

QUALITY: United Heat Exchangers are carefully designed and tested from selection of raw materials as per specifications and the quality is tested with its own quality control departments. X-Ray Hydraulic, Pneumatic, penetration testing are the series of regular tests routinely adapted by UNITED to confirm and witness the quality as per standards. Also Third party inspection agency like Lloyds Register, IBR,RITES and Engineers India are also arranged for Quality assurance. 

PRODUCT RANGE: Water Heat Exchangers for process cooling, Generators etc. Oil coolers for Hydraulic quenching oil, transformers, gear boxes etc. Inter/After Coolers for Compressors, Condensers, Chillers, Evaporators, Air Blast oil coolers, Pressure vessels, Heat Exchangers & oil coolers for marine Air heaters, Tray driers for tea, leather etc. Wire/strip wounded fin type coolers for process cooling Hydraulic, Rig Compressors, Railways, Earth movers, Genset air coolers, Gas coolers, Dry Cooling Towers etc are manufactured.

In Heat exchanger system, the new and latest type of compact and effective model Heat exchanger is plate type heat exchanger. Another type of heat exchanger is the plate heat exchanger. One is composed of multiple, thin, slightly-separated plates that have very large surface areas and fluid flow passages for heat transfer. This stacked-plate arrangement can be more effective, in a given space, than the shell and tube heat exchanger. 

Advances in gasket and brazing technology have made the plate-type heat exchanger increasingly practical. In HVAC applications, large heat exchangers of this type are called plate-and-frame; when used in open loops, these heat exchangers are normally of the gasketed type to allow periodic disassembly, cleaning, and inspection. There are many types of permanently-bonded plate heat exchangers, such as dip-brazed and vacuum-brazed plate varieties, and they are often specified for closed-loop applications such as refrigeration. Plate heat exchangers also differ in the types of plates that are used, and in the configurations of those plates. The closely spaced metal heat transfer plates have troughs or corrugations, which induce turbulence to the liquids flowing as a thin stream between the plates. 

The plates have corner ports, which in the complete plate pack form a manifold for even fluid distribution to the individual plate passages. As an exclusive feature, parallel flow heat exchanger plates have interlocking gaskets in which upstanding lugs and scallops are sited intermittently around the outside edges. The seal between the plates is established by a peripheral gasket which also separates the thru port and flow areas with a double barrier. The interspaces are vented to atmosphere to prevent cross-contamination in the rare event of leakage. Plate heat exchanger, consists of a stationary head and end support connected by a top carrying bar and bottom guide rail. These form a rigid frame, which supports the plates and moveable follower. The closely spaced metal heat transfer plates have troughs or corrugations, which induce turbulence to the liquids flowing as a thin stream between the plates. 

The plates have corner ports, which in the complete plate pack form a manifold for even fluid distribution to the individual plate passages. For further details for plate heat exchanger, please contact our marketing division.

Air Cooled Condenser condensate exhaust steam from the turbine and it return the condensate to the boiler. That is in power plants steam is used to rotate the turbine. After the application, the steam will be a waste one. So as an economical part of operation, the steam is re condensate to water and then re-used for boiler feed water.

The Air Cooled condenser is made of modules arranged in parallel rows as like Air Cooled Heat Exchanger. The module contains number of Finned Tube bundle. The axial flow forced draft fan is fixed in the module and forces the atmospheric cooling air across the Condensate area of the fin tubes.

The scope of supply of an Air Cooled Condenser will include all turnkey job from supporting structure, steam ducting from the steam turbine interface and all auxiliaries like pumps, duct drain tanks, instrumentation and air evacuation units related piping works.

Aluminum  heat exchanger is a piece of equipment built for efficient heat transfer from one medium to another. The classic example of a heat exchanger is found in an internal combustion engine in which a circulating fluid known as engine coolant flows through radiator coils and air flows past the coils, which cools the coolant and heats the incoming air.  They are widely used in space heating, refrigeration, air conditioning, power plants, chemical plants, petrochemical plants, petroleum refineries, natural gas processing, and sewage treatment.  The media may be separated by a solid wall, so that they never mix, or they may be in direct contact.

Marine Heat Exchangers  exhaust manifold is necessary on marine engines to reduce the temperature of the engine-room air space and the exhaust pipe.  Our development is to combine a water jacketed exhaust manifold with the heat exchanger and header tank. This arrangement is particularly suitable for small series-produced engines; the manifold is cooled by fresh water and as a result a keel-cooled engine can be made by omitting the heat exchanger tube stack and the sea-water pump. On installation the fresh-water outlet from the manifold would be connected to the keel pipes and the return taken back to the engine fresh-water pump. 


Heat exchanger/manifold assemblies are heavier than ordinary marine manifolds and must therefore be supported on the underside using the fixing lugs provided. If the exhaust manifold is in the sea-water circuit it should be installed with the sea-water inlet at the back and the outlet at the front on the top to ensure that it operates completely full of sea-water. If the manifold is in the fresh-water circuit a small by-pass hole must be provided in the thermostat to ensure that some water is circulating through the manifold at ail times.

A double pipe heat exchanger, in its simplest form is just one pipe inside another larger pipe. A hairpin heat exchanger may have only one inside pipe, or it may have multiple inside tubes, but it will always have the doubling back feature shown.

The wall of the inner pipe is the heat transfer surface.

 The pipes are usually doubled back multiple times as shown in the diagram at the left, in order to make the overall unit more compact.

One fluid flows through the inside pipe and the other flows through the annulus between the two pipes.

Flue Gas Air Pre Heater consist of straight tube bundles which pass through the outlet ducting of the boiler and open at each end outside of the ducting. 

Ambient air is forced by a fan through ducting at one end of the preheater tubes and at other end the heated air from inside of the tubes emerges into another set of ducting, which carries it to the boiler furnace for combustion. 

Inside the ducting, the hot furnace gases pass around the preheater tubes, transferring heat from the exhaust gas to the air inside the preheater.

Brazed Plate Heat Exchangers represent the most compact, rugged and cost-effective means of transferring heat in many industrial and refrigerant applications.  The SB-Series features corrugated plates that produce highly turbulent flow in a true counter-current direction. Built from 316 stainless steel with copper brazing materials, they provide exceptional corrosion resistance.

Coil type heat exchanger  are more efficient than shell and tube exchangers for low flow rates. Coil type heat exchanger  surface is clean both inside and outside with no caustic stains. Coil type heat exchanger  produced by are metal industries are suitable to transfer heat in a wide variety of operating conditions and to refuse to accept decay for the longest period of time possible under the harshest operating circumstances. 

Vertical Shell and tube heat exchangers consist of a series of tubes. The second fluid runs over the tubes that are being heated or cooled so that it can either provide the heat or absorb the heat required.

One set of these tubes contains the fluid that must be either heated or cooled. Vertical Shell Tube Heat Exchanger is widely used in variety of application as a cooling solution.

Compact heat exchangers transfer more energy in a cost-effective manner than other heat exchangers and save more energy when compared to standard technology. Compact heat exchangers are characterized by a high surface area per unit volume, which can result in a higher efficiency than conventional heat exchangers, in a significantly smaller volume typically Compact heat exchangers can achieve efficiencies of over for non-compact heat exchangers.

Water heating is a thermodynamic process using an energy source to heat water above its initial temperature. Domestically, water is customarily heated in vessels known as water heaters, kettles, cauldrons, pots, or coppers.

Appliances for providing a more-or-less stable supply of hot water are variously known as water heaters, hot water heaters, hot water tanks, boilers, heat exchangers, calorifiers, or geysers depending on whether they are heating filtered or non-potable water, in domestic or industrial use, their energy source, and in which part of the world they are found.

These metal vessels heat a batch of water, but do not produce a continual supply of heated water at a preset temperature. 

Air cooled Heat Exchangers (or) Fin fan Cooler or Air Fin Cooler are the same Air Cooling equipment. In some part of the world Air Cooled Heat Exchangers are also known as Air Fin Cooler. Simply says Air Fin cooler, Fin Fan cooler, Coil Cooler, Dry Cooling Tower are the other names of Air Cooled Heat Exchangers. It also used for Heat rejecting from a hot process fluid to the surrounding atmosphere by using the atmospheric air as a cooling media.

The Air Fin Coolers are basically designed with multiple rows of finned tubes in a series of surface and required numbers of fans are used to move the low temperature atmospheric ambient air over the finned tube coil surface in order to cool the hotter fluid media. It is nothing but an extended type of industrial or automotive radiators. The finned tube bundles are modular construction for easy transportation. The various types of headers are Welded Bonnet Header, Plug Header, Manifold header, Plug and pipe header etc.,
The various types of Fins are 'L' type Wrap-On Fins, 'G' type Embedded Fins and Bi-metallic Extruded Fins etc.,. In some small type heat Exchanger wire/ strip type copper wounded / knurled Fins are also used. Other than finned tube bundle and headers, Axial flow fans and drives etc are used as per the Cooler requirement.

These Air Cooled Type Heat Exchangers are used in oil, gas, petrochemical, refinery, power and condensation plants. All type of fluids in process industries are cooled in Air Fin Coolers with the use of atmospheric air, as the cooling media which resulting in economy in running costs.

Our Air Cooled Heat Exchangers are used for high pressure, high temperature applications in process industries with metallurgy suitable for highly corrosive fluid medias.

Oil Cooler are normally supplied in straight length in annealed & half hard temper. Oil Cooler shaped by are metal industries not only have the stiff tolerances but also have the most dependable dimensions throughout the tube length. The tube surface is clean both inside and outside with no caustic stains. Oil Cooler produced by are metal industries are suitable to transfer heat in a wide variety of operating conditions and to refuse to accept decay for the longest period of time possible under the harshest operating circumstances. Oil Cooler are more efficient than shell and tube exchangers for low flow rates.

U tubes can duplicate any existing bundle to include dimensions, materials and performance. 

A heat-exchanger system consisting of a bundle of U tubes hairpin tubes surrounded by a shell outer vessel. one fluid flows through the tubes, and the other fluid flows through the shell, around the tubes. 

One of the most common applications is the cooling of Hydraulic Fluid and oil in engines, transmissions and hydraulic power packs.

With the right choice of materials they can also be used to cool or heat other mediums, such as swimming pool water or charge air.