VWR 1179MD circulator

VWR 1179MD Recirculating Chiller

The VWR 1179MD Recirculating Chiller is a high-capacity laboratory cooling system designed for analytical instruments, scientific equipment, and processes requiring reliable closed-loop heat removal. With a -10°C to +40°C operating range, approximately 2,900 W of cooling capacity at 20°C, and a magnetically coupled centrifugal pump capable of circulating approximately 15.5 L/min, the 1179MD provides substantially greater cooling capacity than smaller general-purpose laboratory chillers.

Available used and refurbished from American Instrument Exchange, the VWR 1179MD is particularly well suited for analytical instrumentation, rotary evaporators, condensers, reaction vessels, vacuum systems, lasers, and other heat-generating equipment. Its closed-loop design can also provide a more consistent and water-efficient alternative to once-through facility-water cooling. A 90-day warranty is included.

Key Features

• -10°C to +40°C operating temperature range

• Approximately ±0.1°C temperature stability

• 2,900 W cooling capacity at 20°C

• 1,835 W cooling capacity at 10°C

• 1,100 W cooling capacity at 0°C

• 1 HP refrigeration compressor

• Magnetically coupled centrifugal pump

• Maximum flow approximately 15.5 L/min

• Maximum pump pressure approximately 10 psi / 0.69 bar

• 4.1 L / 1.1 gal reservoir

• Digital LED temperature display

• Microprocessor-based temperature control

• PID temperature regulation

• Digital pressure/flow monitoring

• 1/2 in. NPT inlet and outlet connections

• Closed-loop external equipment cooling

• 208/230 V, 60 Hz operation

• Used, refurbished, and tested by American Instrument Exchange

• 90-day warranty included

Overview

The VWR 1179MD is one of the higher-capacity models in VWR's 1100 Series of recirculating chillers. It is designed to continuously remove heat from externally connected laboratory and analytical equipment while maintaining a controlled coolant temperature.

The 1179MD designation is important when evaluating this system. The MD version uses a magnetically coupled centrifugal pump designed to provide relatively high coolant flow at moderate pressure. This differs from the 1179PD, which uses a positive-displacement pump intended for applications requiring substantially higher pressure.

With approximately 2.9 kW of refrigeration capacity at 20°C, the 1179MD can handle considerably larger thermal loads than smaller VWR chillers such as the 1171MD and 1173MD.

A digital control system continuously monitors operating temperature while active fluid circulation transfers heat from connected equipment back to the chiller's refrigeration system.

Key Specifications

Common Applications

The VWR 1179MD is designed for laboratory equipment requiring continuous liquid cooling and moderate-to-high heat removal. Typical applications include ICP systems, atomic absorption furnaces, lasers, rotary evaporators, condensers, reaction vessels, vacuum systems, plasma and laser etching equipment, and other analytical or process instruments.

Its approximately 2.9 kW cooling capacity at 20°C makes it especially useful for applications that exceed the capabilities of smaller benchtop recirculating chillers.

The 1179MD can also replace once-through facility-water cooling in many compatible applications. Instead of continuously consuming tap water and discharging it to drain, the chiller refrigerates and recirculates a controlled volume of heat-transfer fluid.

This can reduce water consumption while providing more predictable coolant temperature and circulation conditions.

Ideal Laboratory Types

The VWR 1179MD is well suited for analytical laboratories, pharmaceutical and biotechnology facilities, chemistry laboratories, spectroscopy facilities, materials-science groups, semiconductor and electronics laboratories, industrial R&D facilities, quality-control departments, and academic research laboratories.

It is particularly appropriate for laboratories operating heat-generating equipment that requires relatively high coolant flow but does not require the elevated pressure provided by a positive-displacement pump.

Facilities looking to reduce reliance on facility-water cooling may also benefit from installing a dedicated closed-loop chiller such as the 1179MD.

Temperature Control & Stability

The VWR 1179MD operates from approximately -10°C to +40°C with temperature stability of approximately ±0.1°C.

Cooling capacity changes significantly with operating temperature. This configuration provides approximately 2,900 W of refrigeration capacity at 20°C, 1,835 W at 10°C, and 1,100 W at 0°C.

This cooling curve is important when determining whether the 1179MD is appropriately sized for a particular application. A process generating a 2 kW heat load may be comfortably within the chiller's capacity around 20°C but exceed the available refrigeration capacity when 0°C coolant is required.

Buyers should therefore compare their equipment's actual heat output with the chiller's available cooling capacity at the intended coolant temperature rather than relying solely on its maximum 2.9 kW rating.

Circulation & Pump Performance

The VWR 1179MD uses a magnetically coupled centrifugal pump capable of delivering approximately 15.5 L/min, or 4.1 GPM, at a maximum pressure of approximately 10 psi.

This pump configuration favors relatively high fluid flow at moderate pressure, making it useful for equipment with reasonably unrestricted cooling circuits.

The MD configuration should not be confused with the VWR 1179PD. The PD version uses a positive-displacement pump designed for applications requiring substantially higher pressure but different flow characteristics.

Actual flow through connected equipment depends on tubing diameter and length, fittings, coolant viscosity, operating temperature, elevation, and restrictions within the instrument's cooling circuit.

Before connecting the 1179MD to sensitive analytical equipment, users should verify the instrument's required coolant flow and maximum allowable inlet pressure.

Refurbishment & Testing

This used VWR 1179MD Recirculating Chiller is refurbished and tested by American Instrument Exchange before shipment. Our technicians inspect the refrigeration system, compressor, centrifugal circulation pump, temperature controller, display, reservoir, condenser, electrical components, safety systems, and external fluid connections.

Temperature-controlled equipment is tested using NIST-traceable probes and data loggers. The refrigeration system is operated for extended periods to evaluate cooling performance, circulation, temperature regulation, controller operation, and overall system stability.

The reservoir and accessible fluid-contact components are cleaned and inspected before shipment.

If your application requires operation at a particular temperature or has specific flow, pressure, or testing requirements, contact American Instrument Exchange before shipment. When practical, our technicians can incorporate customer-requested operating conditions into final testing.

A 90-day warranty is included with this refurbished VWR recirculating chiller.

Choosing the Right Recirculating Chiller

The VWR 1179MD is particularly well suited for applications requiring substantial refrigeration capacity combined with relatively high coolant flow.

Its approximately 2.9 kW cooling capacity at 20°C places it toward the upper end of the VWR 1100 Series, while the 15.5 L/min centrifugal pump provides considerably more flow than positive-displacement configurations intended for restrictive, high-pressure cooling circuits.

Choosing between MD and PD models should therefore be based on the requirements of the connected equipment rather than cooling capacity alone. The 1179MD is generally better suited to applications requiring higher flow at moderate pressure, while a positive-displacement model may be preferable for restrictive cooling circuits requiring greater pressure.

Electrical requirements are another important consideration. This 1179MD requires 208/230 V, 60 Hz service and should be matched to appropriate laboratory electrical infrastructure before installation.

American Instrument Exchange can help compare available used and refurbished recirculating chillers based on required coolant temperature, thermal load, flow, pressure, electrical service, and instrument compatibility.

Related Equipment

American Instrument Exchange stocks a range of laboratory circulators, including VWR recirculating chillers, refrigerated/heated circulating baths, immersion circulators, and process temperature-control systems. Laboratories using the VWR 1179MD may also require evaporators and extractors, reactors and fermenters, laboratory water baths, or other refurbished laboratory equipment.

VWR 1179MD Frequently Asked Questions

What is the temperature range of the VWR 1179MD?

The VWR 1179MD operates from approximately -10°C to +40°C with temperature stability of approximately ±0.1°C.

How much cooling capacity does the VWR 1179MD provide?

This 1179MD configuration provides approximately 2,900 W of cooling at 20°C, 1,835 W at 10°C, and 1,100 W at 0°C.

What type of pump does the 1179MD use?

The 1179MD uses a magnetically coupled centrifugal pump. The MD designation differentiates it from VWR's PD models, which use positive-displacement pumps.

What is the maximum flow rate of the VWR 1179MD?

The centrifugal pump provides maximum flow of approximately 15.5 L/min, or 4.1 GPM.

What is the maximum pump pressure?

The 1179MD provides maximum pump pressure of approximately 10 psi or 0.69 bar. Applications requiring substantially higher pressure may be better suited to a positive-displacement chiller.

What is the difference between the VWR 1179MD and 1179PD?

Both models provide similar refrigeration capacity, but their pumps are designed for different applications. The 1179MD uses a centrifugal pump for relatively high flow at moderate pressure, while the 1179PD uses a positive-displacement pump for more restrictive cooling circuits requiring higher pressure.

Can the VWR 1179MD replace tap-water cooling?

In many compatible applications, yes. The 1179MD recirculates refrigerated heat-transfer fluid through a closed loop, potentially reducing continuous facility-water consumption while providing more consistent coolant conditions.

Does this refurbished VWR 1179MD include a warranty?

Yes. This used VWR 1179MD is refurbished and tested by American Instrument Exchange and includes a 90-day warranty.

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