Hello Every one

Appreciate if any body can help me understand what is the flow rate through the Moog Servo Model G772K240A when input Command is 0 mA i.e. Spool is Centred in the Bush. Based on my understanding of Moog Servo internals, I believe there must be some flow through the inelt orifices & nozzles even when the spool is centred in Bush and Flapper is centred b/w nozzles

 

Firstly let me mention the change Moog is making to their model numbering system:
In the past, the first letter of the part number showed the country of manufacture e.g. a DO772 (German Origin) JO772 (Japanese origin) EO772 (England) etc...
They have now moved on to 'G' which stands for Global
The 'Global' badged valves may be produced in low-cost regions such as the Philippines

The total leakage through the valve is the constant flow to the pilot stage through the inlet orifices and nozzles + the leakage over the spool.
Although the pilot stage leakage is pretty much constant over the valve's lifetime, the spool leakage flow increases with spool wear.
On 'zero deadband' spools (aka Axis Cut) the leakage is highest when the spool is centred, and the total leakage is often expressed as a percentage of the valves rated flow.