GDSZ-50 Series Refrigerated & Heating Circulators

Product Description

GDSZ-50 series Refrigerated & Heating Circulators belongs to high and low temperature oil bath circulation device, it can match use with 50L double-layer glass reactor. According to the specific test environment, GDSZ-50 series Refrigerated & Heating Circulators is a new generation of products which is researched and developed on the basis of DLSB low temperature cooling liquid circulating pump and GY oil bath, with the function of one machine with multiple, and widely used in small space with a variety of specific environment. Through data programming for the equipment of intelligent temperature controller, by temperature sensing system feedback container temperature data, the controller control the compressor to make cooling, let the medium in the cold trough get low temperature; through the heater heat, so that the medium in the tough can obtain high temperature, by rapid thermal process, it can let medium temperature in the tough suiting for user needs, then through the absolutely leakage shielding circulating pump transfer the medium to an external device (such as a reactor). After the re-flux is switched, turn on the valve, the purpose of heat circulation can be achieved. When the corollary equipments(glass reactor, rotary evaporator, extraction equipment) of GDSZ-50 series Refrigerated & Heating Circulators require rapidly warming or cooling, GDSZ pump would satisfy their requirements. It can quickly shift function between heating and cooling, and using one same medium(conduction oil), which thoroughly changed the disadvantage of conducting heating and warming in separate instruments in the past.

GDSZ-50 series Refrigerated & Heating Circulators, its whole liquid circulation is closed, with expansion vessel, expansion tank and liquid circulation is adiabatic and does not participate in the liquid circulation, it is only the mechanical connection. No matter the liquid circulation temperature is high or low, the medium in the expansion container is lower than room temperature. The whole liquid circulation is a closed system, it can be done at low temperature without water vapor absorption, high temperature without oil mist generation.

GDSZ-50 series Refrigerated & Heating Circulators use PID intelligent control, according to chemical process to automatic adjust power output, accuracy control the temperature of reaction process, and satisfying requirements for temperature changing.

For standard model, set max temperature difference between vessel body and clamp cover according to factory’s safety requirements, if outdoor temperature difference up to the limiting value, equipment would auto stop and give an alarm, to ensure no fracture.

For special custom-made model, we can offer max flow rate and generate min pressure and heat quantity, reach to max heat exchange rate, min systemic resistance, min pump system heat quantity and min system energy consumption.

Based on no-load lowest temperature, there are 6 models of GDSZ-50 series Refrigerated & Heating Circulators: GDSZ-50/-20, GDSZ-50/-30, GDSZ-50/-40, GDSZ-50/-60, GDSZ-50/-80, GDSZ-50/-120.

Product features of GDSZ-50 series high temperature circulating pump:

1.Equip with castor, convenient to move.

2.Light touch button is convenient to operate.

3.Liquid discharge mouth is convenient for update medium.

4.Inclined air inlet and outlet, round design of corner, to prevent accidental injury.

5.Over-temperature protection and alarm system ensured safety.

6.It can continuous cooling from 200℃ to -78℃, the cooling speed is as high as 5-10℃/m under high temperature.

7.PID control method greatly improved the temperature control accuracy.

8.Fully closed pipe system reduced conduction oil oxidation, and with unique oil mist cooling function. It not only lengthen oil using life but also reduce circulating pressure, increase flow rate.


GongYi Ruide Instrument GDSZ-50 series Refrigerated & Heating Circulators is widely used in colleges and universities, environmental protection, biochemical, medical, chemical industry, scientific research, biological industries etc. It’s an ideal instrument for laboratory for its reasonable structure, easily operation and good stability performance.











Match double layer reactor


Storage tank volume


Heating volume


Heating tank size(mm)


Fuel tank size


Temperature Range







Best environment temperature


Around humidity


No-load minimum temperature






Voltage and Hertz

220V±10% 50HZ

Heating power


Cooling power







Meter temperature range



Temperature accuracy




Medium viscosity


Circulating pump power


Pump head


Flow (L/min)





Cooling mechanism

Closed compressor

Cold medium



Closed leak-free pumps

Inlet and outlet nozzle

4#(low inlet, high outlet)

temperature control method

Microcomputer intelligent temperature control, liquid crystal display

Display temperature resolution

In the range of temperature control, the minimum display value of 0.1

security protection

delay, leakage, over current, over heat protection

Body material

Power Anti-corrosive











inlet or outlet connector

1 set



Liquid inlet and outlet sealing gasket

1 set

Stainless steel flexible hose



According to user requirements, it can be made explosion-proof type, and equipped with double inlet and outlet valve.


Pre-sale Service

1.According to product’s using condition, technicians will offer rationalization proposals to assist clients to select proper types;

2.Provide detailed product performance specification;

3.Provide professional quoted price;

4.Provide 24-hour technical consulting reply.

5.Provide other corollary equipment according to client requirements.

In-sale Service

1.Begin to supervise from raw material, its qualified rate can reach to ;

2.Whole manufacturing process are in strict accordance with promised procedure requirements, product qualified rate can reach to ;

3.Provide product’s inspection record of key junctures to customers;

4.Provide production schedule photos to customers at regular intervals;

5.Package and transport products strictly accordance with export standard;

6.Provide transportation schedule information to clients timely.

After-sale Service

1.Provide targeted installation video;

2.Under the premise of correct installation, normal maintenance and using, we guarantee one-year warranty period;

3.When warranty period has expired, our sold products enjoys lifetime guarantee repair, we only charge cost price for changing product’s standard component and sealing component;

4.During installation and adjustment period, our after-sale service staff will communicate with customers frequently to know product’s running state in time. Assist customers to install and adjust products until customers are satisfied;

5.If product has malfunction during operation period, we’ll offer you satisfied answer in time. We’ll reply you within 1 hour and provide solution or send staff to spot within 24 hours after receiving maintenance notification.

6.Lifelong free technical support. Conduct satisfaction survey and inquiry equipment running condition to clients by telephone or e-mail semiannually from the first day of equipment running, put on records of acquired information.

7.Provide assistant service if product is damaged during transportation.

Tech Data

Packaging And Shipping


1.Carton+wooden cases.

2.Customized packaging can be available.


1.We can ship the goods to you by International Express such as DHL,UPS,TNT,EMS and so on.

2.You can also choose the appropriate one based on your timeline and budget.

3.You can choose to use your own shipping agent.


1.Imported full sealed sealed compressor, quality is guaranteed.

2.GDSZ-50 series Refrigerated & Heating Circulators with high and low temperature resistance, the product has excellent performance.

3.Microcomputer control, temperature digital display, improve the accuracy of the experiment.

4.Control system with delay, overheating, over-voltage and other overload protection device.

5.GDSZ-50 series Refrigerated & Heating Circulators has the reasonable layout and compact structure.

6.Refrigerating medium use high quality relay, protector, capacitor, reliable performance and long service life.

7.Stainless steel container with pressure resistance of 40kg, with function of anti-corrosion, rust protection and anti liquid pollution.

Corollary Equipment

GDSZ-50 series Refrigerated & Heating Circulators can be conveniently with double-layer glass reaction kettle, stainless steel reaction kettle, glass reactor, rotary evaporator, extraction equipment and other products, it realized the multi use of GDSZ series products.