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Basic operation
Two Safety Discs
Turbine
Pressure Loading Valve
The CTR/LTR has two functional areas - flow meter and loading valve - both are housed in one aluminium block
Flow meter
All CTR/LTR flow meters work on the same basic theory - the fluid flow is used to rotate a turbine, the speed at which the
turbine rotates is proportional to the flow rate. This rotational speed is measured by a magnetic transducer counting the
axial turbine blades as they pass. The turbine blade is designed to minimise the effects of variations in temperature and
viscosity and built-in flow straighteners eliminate flow swirl and allow flow measurement in both directions.
Loading valve
All loading valves work on the same theory - a poppet is moved in and out of a flow port via a threaded shaft. The unique
design of the pressure-balanced poppet ensures low handle effort throughout the flow and pressure ranges in addition
to excellent tactile feedback, regardless of flow direction. In the event of overpressure, replaceable safety discs (situated
within the poppet) rupture, to internally bypass the oil at low pressure. Safety discs with different pressure ranges up to
480 bar (7000 psi) are available.
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