Alco Controls
Controls for refrigeration, air conditioning, heat pumps

To control refrigeration, air conditioning and heating systems Emerson Climate Technologies offers a broad range of expansion valves, filter driers, solenoid valves, oil management products, pressure transducers, thermostats, etc. All components of Alco Controls, mechanical as well as electronic, are designed and manufactured to ensure maximum efficiency and reliability. Optimizing system performance is central to Alco Controls developments.




High Pressure Expansion ValveThe refrigerant R744 (CO2) is of growing interest for medium and low temp refrigeration applications. In transcritical applications, special high pressure expansion valves are used to reduce the pressure to subcritical levels. The new CX series stepper motor driven valves are used for precise control of R744 (CO2) refrigerant mass flow with a maximum working pressure of 120 bar. Other important features are the fully hermetic design without thread joints between valve body and motor compartment. The positive shut-off function, with very short full stroke time eliminates the use of an additional solenoid valve. Direct coupling of motor and valve provides high reliability, because it requires no gear mechanism. Corrosion resistant stainless steel body and connections allow usage in demanding environment with temperatures around 0°C with condensing and freezing water. Accurate flow and minimal wear is achieved by ceramic slide and port.