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GTM Series Counter Flow Closed Water Cooling Tower

GTM Series are of regular capacities from 6 to 305 nominal tons. Casing made in special alloy coated steel or stainless steel, Heat exchange coils made in stainless steel or red copper. GTM Towers tend to be more compact, taking less installation space, working without any wet deck fill, more suitable to cool hot water of higher inlet temperature. The towers dimensions can be customized to suit standard containers or particular project conditions. GTM towers are widely applied in different fields, to cool circulating water, oil or other process fluid for Melting/ Vacuum/ Multi-crystal Furnaces, Induction Heaters, Compressors, Heat Pumps, Metal Parts Production Lines, Hydraulic Stations, Power Generators, Transformers, Converters, etc.




The standard enclosure is made of a special type of highly corrosion-resistant steel sheet coated with a composition of Zn+Al(11%)+Mg(3%), and a trace amount of silicon, originally imported from Nippon Steel or Posco. The panels are sheared and folded precisely in whole cold machining process, then densely bolted and sealed for water tightness, with sufficient reinforcing bars, preventing deforming during hoisting process in fields. Each tower is completed with maintenance access and doors of maximized size, for internal inspection convenience. Heat exchange section is firmly supported by frame made in stainless steel, or H.D.G steel plated entirely after welding.



The water cooling series adopt high efficient heat exchange coils. Optimized coils has effectively reduced air-side resistance, suitable to work with larger amount of spray water, and significantly improved heat transfer efficiency. The heat exchanger combines one or more coils supported by steel structure, firm and durable.This whole section is of patented design, easy to eliminate cooling medium fluid. Standard coils tube made in stainless steel 304/316, or red copper and titanium ally on option. Different wall thickness can be met on request. Each coil is tested under continuous nitrogen gas pressure of 30 bar for 24 hours, ensure no leaking or weak point, with guarantee provided for 18 for both raw material and design of this critical section of an evaporative cooler.

SJ- Direct Coupled Fan-1


GTM Series adopt highly efficient direct-drive axial fans, fitted with airfoil blades made in high strength resin or al-alloy, coupled and perfectly balanced to a weather proof TEFC three-phase electric motor. The impeller tip speed is suitable to keep the noise level within acceptable limits. Fan cylinder is made in galvanized steel or stainless steel. All parts are durable in heavy duty environment for long service life.


Standard spray pumps are of GZ horizontal centrifugal series from GSD brand, with motor of brand TECO, specially designed for evaporative cooling equipments, of generally large flow rate but low pumping head. The selected pumps are of dynamic-static balance, with shaft as an extended section from the motor, for most reliable concentricity. With first grade bearings, the pumps runat minimized vibration and low noise. Mechanicseals avoids abrasion to shaft, no leakage in long term service life. Overload protected on any point of the performance curve, not exceeding the rated power during the whole working period. Enclosure materials and installation arrangement can be optional and modified to suit different projects requirements.




Cellular Drift Eliminators are specifically designed to achieve maximum drift removal. With significantly lower pressure drop. The modules are constructed of a series of sinusoidal-shaped, corrugated PVC sheets that are mechanically assembled to mating sinusoidal structural waves, forming closed cells. These cells force the drift droplets being carried in the leaving airstream to make three distinct changes in direction. When the air is forced to change direction, the inertia of the water droplets keeps them moving in a straight line, causing them to impact the wall of the drift eliminator and drain back into the wet section of the tower.



Cellular air Inlet louvers with advanced design improve air flow into the cooling tower, keep out debris, eliminate water splash-out, which otherwise can cause icing, near-site water damage,and unnecessary water loss. The deign restrict the amount of sunlight into the cooling tower to impede algae growth, reduce noise from the tower, and improve the tower's appearance.




Spray Pipes made in U-PVC from FPC, of high mechanical strength and long service life, holding pressure1.0 Mpa, accessible to inspect and maintain from outside of the tower, convenient to check with when running fully, completed with buttonholes for quick and tight installations of spray nozzles.

SJ-Float Valve(X)-1


Valve body casted in S.S 304, of gear type allowing water level adjustment more flexible in a wide range with big angle. Float ball made of ABS with internal polyurethane foam filled, free of leaking concern. The entire float valve system is particularly developed for cooling towers, of long service life.




The filter is punched in the same material as the enclosure, highly corrosion resistant. Effectively filtering the sundries, with anti-eddy arrangement, preventing air bubbles sucked into the pumps, to avoid affection on heat exchange of the liquid fluids.



Fastners of leading brands, standard materials in steel dacromet treated, stainless steel on options. Intensity of fastners is higher than average.


Data Sheet

Model No. Nominal
Fan Spray Pump Connecting Pipe(mm) Overall
Air Volumn (m3/s) Power
Flow Rate    (T/h) Inlet/
Drainage L W H



Operation          (kg)
GTM-15 6 0.55 2.4 0.75 20 DN50 DN25 DN40 2200 1000 1830 450 700
GTM-110 12 0.55 2.4 0.75 20 DN50 DN25 DN40 2400 1000 1900 490 800
GTM-115 18 0.55×2 2.4×2 0.75 20 DN65 DN25 DN40 2300 1020 1830 460 1000
GTM-120 24 0.55×2 2.4×2 0.75 20 DN65 DN25 DN40 2300 1020 1900 500 1050
GTM-225 30 0.55×2 2.4×2 1.5 4 DN80 DN25 DN40 2860 1240 2050 730 1650
GTM-230 37 1.1×2 3.7×2 1.5 45 DN80 DN25 DN40 2860 1240 2180 830 1760
GTM-235 43 1.1×2 3.7×2 1.5 45 DN65×2 DN25 DN40 2860 1240 2420 1050 2030
GTM-340 49 1.5×2 5.1×2 2.2 60 DN65×2 DN25 DN40 2860 1520 2440 1280 2500
GTM-350 61 1.5×2 5.1×2 2.2 60 DN80×2 DN25 DN40 2860 1520 2630 1370 2660
GTM-365 79 1.1×4 3.7×4 2.2 60 DN80×2 DN25 DN40 3200 1760 2630 1820 3460
GTM-370 85 1.1×4 3.7×4 2.2 114 DN80×2 DN25 DN40 3200 2120 2750 1930 3970
GTM-380 98 1.5×4 5.1×4 2.2 114 DN80×2 DN25 DN40 3200 2120 2750 2050 4000
GTM-390 110 1.5×4 5.1×4 2.2 114 DN80×2 DN25 DN40 3200 2120 2750 2150 4050
GTM-3100 122 1.5×4 5.1×4 2.2 114 DN80×2 DN25 DN40 3550 2120 2750 2330 4710
GTM-3110 134 1.5×6 5.1×6 2.2 114 DN80×2 DN25 DN40 4150 2120 2870 2650 5550
GTM-5125 152 1.5×8 5.1×8 3.7 140 DN100×2 DN40 DN40 4750 2120 2970 3100 6500
GTM-5150 183 1.5×8 5.1×8 3.7 140 DN100×2 DN40 DN40 5050 2120 3120 3500 7480
GTM-7175 213 1.5×8 5.1×8 5.5 160 DN125×2 DN40 DN40 5480 2120 3120 3800 8240
GTM-7200 244 1.5×8 5.1×8 5.5 160 DN125×2 DN40 DN40 5080 2620 3120 4800 9170
GTM-7225 274 1.5×8 5.1×8 5.5 160 DN125×2 DN40 DN40 5480 2620 3220 5600 11300
GTM-10250 305 1.5×10 5.1×10 7.5 240 DN150×2 DN40 DN40 6230 2620 3220 6000 12560


Nominal Tons are based upon temp. drop 35~29.5°C/ 95~85°F, WBT 25.5°C/ 78°F, and 0.681 m3/hr/ton.

GTM General Outline

Working Theory


SJ-Working Theory-GTM-1


As counter flow towers, the dry cool air is inlet through louvers on both sides of the tower from the bottom, and drawn upwards passing a large heat exchange surface of the coils section under the induced fans, against the spraying water in the opposite way, becoming hot wet air, induced draught out of the tower into the atmosphere by the fans on the top. During this process, a part of the heat from the fluids inside the closed loop is transferred efficiently, and removed to the outside environment.



Compatible with numerous process fluids

(water, water/glycol, oil, other fluids)

 Capable and flexible in customized solutions

 Factory assembled for maximal installation convenience

 Modular design suits a wide range of heat rejection duties

 Compact design with minimal footprints

 Multiple corrosion resistant options

 Low sound operation options available

 More optimizing options available

 Performance and quality guaranteed

 Super long service life



Contact us

Wuxi Sanjiu Cooling Equipment Co., Ltd.
101 Xinjin Rd, Wuxi City, Jiangsu Province, China.



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