NRD-550: Liquid-to-Liquid Heat Exchange Systems

The NRD-550 Series models are non-refrigerated heat exchange systems which utilize a tap or building water source to remove heat from your process. They are particularly useful in situations where the cooling water source temperature is too low, or where the pressure and cleanliness of the water may cause damage to the equipment or compromise performance.

An internal plate-type heat exchanger is used to remove heat efficiently while isolating the cooling and process loops. Large quantities of heat can be removed in a small physical size as compared to refrigerated models. Our modular frames are used to package these systems in order to ensure the smallest possible footprint.

NRD-550 systems are equipped with digital temperature display, a coolant pressure gauge, a liquid level switch, and a flow/pressure adjustment valve. Heat removal capacities are dependent on the cooling water flow rate and on the process water flow rate. A variety of circulating pumps are available to match process requirements. Our engineers are happy to assist in selecting the proper circulating pump and heat exchange system.

Available Options: All stainless steel and polymeric wetted parts, flow meter, pressure relief valve, flow switch, dual level alarm.


* Plate heat exchanger for maximum efficiency
* PID temperature controller
* Electronically-actuated CWS valve
* Coolant level switch w/LED indicator
* Pump motor thermal overload
* Flow adjustment valve


Please contact Tek-Temp at 800-259-4212 for custom capabilities


Specifications for: Model NRD550/S1 NRD550/S2 NRD550/S3
Cooling Capacity See PDF See PDF See PDF
Temp. Control Range 5 to 38°C
Stability ± 0.5°C
Reservoir Volume (gallons) 2.5 8.0
Recirculating Capacity
(see Pump Curves)
As Required As Required As Required
Power Requirements
(Volts, Ø, Hz)
115, 1, 60 115, 1, 60 115, 1, 60
W x H x D (inches)
19.9 x 32.1 x 24.6 19.9 x 32.1 x 24.6 22.3 x 35.1 x 27.6

PUMP OPTIONS:  See pump curves to pick the pump you need.

Pump Type Performance
Centrifugal Pumps C1 0-4 GPM @ 16PSI MAX
Centrifugal Pumps C50 0-20 GPM @ 24PSI MAX
Centrifugal Pumps C75 0-30 GPM @ 30PSI MAX
Centrifugal Pumps C150 0-30 GPM @ 46PSI MAX
Centrifugal Pumps C200 0-40 GPM @ 55PSI MAX
Centrifugal Pumps C300 0-40 GPM @ 65PSI MAX
Rotary Vane Pumps R1 1.0 GPM @ 0-80 PSI
Rotary Vane Pumps R2 1.8 GPM @ 80 PSI
Rotary Vane Pumps R2K 2.4 GPM @ 0-60 PSI
Rotary Vane Pumps R3D 3.3 GPM @ 0-60 PSI
Rotary Vane Pumps R3 4.3 GPM @ 0-60 PSI
Rotary Vane Pumps R4 4.8 GPM @ 0-60 PSI
Turbine Pumps T1/P31C 3.2 GPM @ 54 PSI
Turbine Pumps T31F (T2B) 4.6 GPM @ 56 PSI
Turbine Pumps T31G 5.5 Gpm @ 54 PSI
Turbine Pumps T31H (T2C) 6.5 Gpm @ 54 PSI
Turbine Pumps T41G 9.3 GPM @ 40 PSI
Turbine Pumps T41L 12.8 GPM @ 80 PSI
Turbine Pumps T41M 16.5 GPM @ 60 PSI

Add Audible Alarm


Back-Flow Prevention

Coolant Particle Filter

Dual Setpoint Select

Flow Meter (Digital)

Flow Switch:  Contact output whether there is flow or no flow

2-Stage Level Switch

Reservoir Level Gauge

Nitrogen Purge

Overtemperature Switch

Phase Monitor

Pressure Relief Valve:  Provides up to 100% bypass of the pump flow

Coolant Pressure Switch

Process Variable Retransmit

Remote Analog Setpoint

RS-485 Serial Communications with Temperature Control:  Enables control of setpoint and read-back of temperature via PC

System Remote Start/Stop

Remote Temperature Sensor/Limit Control

Signal Output (Basic)

Temperature Alarm:  Provides a configurable isolated contact output to indicate alarm status; mating connections included

Stainless Steel and Polymeric Wetted Parts