CMS/User Guide - Filterteknik

• See the figures at the start of this section for examples of wherethe CMS could be connected.• If there is a pair of connections in the hydraulic circuit that operateswith a differential pressure near to that calculated, then theCMS can be connected there.• Alternatively, create the pressure drop by modifying the hydraulicsystem. For example, insert a check-valve in the circuit with a 4bar spring. 12 The "component’’ could also be a filter, a restrictoror even a piece of piping if it has a suitable pressure drop acrossit.• If none of these options is feasible, then an active flow controllerwill likely be needed, see 15.3.• Otherwise connect the CMS across the points identified, takingcare to maintain an upward flow of oil through the unit (this reducestrapped air).Of course in a real system the pressure and viscosity will varywith temperature and operating conditions. But since the workingflow range of the CMS is very wide, this should not be aproblem provided it remains within range. On the graph thearea between upper and lower lines represents the usable operatingregion for the CMS, with the middle line being ideal.The differential pressure and the viscosity can vary from theideal, provided the system stays within the upper and lower lines.This ensures the flow stays within the working range of 20 - 400ml/min. It can be seen that the unit will accommodate a 20:112 In fact the CMS will work perfectly well at a lower flow, for example 100ml/minute,in which case a 2 Bar check-valve could be used.52 Hydraulic Connection