Image

Benefits VD84 at a glance

  • Pirani sensor with durable, elastic helix filament
  • External, detachable sensor with stainless steel small flange DN 16 ISO-KF or 1/8" NPT male thread, connected by spiral cable (1.20 m)
  • Integrated metal facing protects the sensor against contamination like oil vapours or solvent vapours

Evacuation and charging of cooling systems

Refrigerators, air conditioners and cooling machines operate according to a thermodynamic cycle process, in which heat is transferred from the cooling cabinet to a warmer surrounding.

Challenge

A suitable refrigerant is used in the system's cooling circuit to transport the heat. Before filling the chiller for the first time and when refilling after maintenance work, the cooling circuit must first be completely evacuated to a pressure of around 10-3 mbar, as otherwise residual air and existing humidity can reduce the performance of the cooling system or even damage it. Furthermore, leaks in the cooling circuit must be avoided.

Solution

Compact vacuum meters of type VD84/2 with an external Pirani sensor measure the residual pressure in the cooling circuit with the required resolution and accuracy. Also, the leak rate of the system can be determined via a short pressure rise measurement. The handy gauges are easy to operate and are ideal for use in the service and maintenance sector. Measurements can easily be stored and analyzed on a PC via the USB interface.

Suitable products in the online shop