Sorry, I'm not clear on the first question. But no matter, you want to take the pressure requried at the machine and add to it the expected losses (as you noted). That will tell you the pressure your pump must develop at that flow rate. If your system does not fluctuate much, then yes, that's all you need to do. Select a pump that matches those conditions.
But for a more in depth look at it, here's some other considerations:
Pump efficiency -/Many pumps, especially pumps which have motors/gearboxes/sheaves which drive them at various speeds, will match your criteria. You will want to select a pump which meets your operating conditions at or near the pump's BEP, or Best Efficiency Point (typically it is advised that, if you are going to select an operating point not on the BEP--that is, if you can't control exactly the speed the pump will operate at--then select a point to the
right of the curve, not the left.
If the pump itself (not the motor) will be using a gearbox or sheave/pulley system to control speed (and therefore operating conditions) then I'd recommend not dropping the speed any lower than 40% of the nominal pump speed (ie. if the curve is shown for 1800 rpm, be wary of running the pump at anything lower than 800. Some pumps will do it fine, but check with the manufacturer.
As for VSD's (Variable Speed Devices, such as a variable frequency device/control) it's not typically recommened that you drop the motor speed any lower than ~50% nominal speed, depending on the type of motor. If it's TEFC, or totally enclosed-fan cooled, (as many off the shelf units are) then what happens is the lower operating speed may not be enough to cool the motor internals and you could wind up having loads of issues with temperature alarming and faulting (which I hope you consider implementing)
Motor size -/ A pump will require a certain horsepower (or kW) at the operating point, this is generally known as hydraulic power, the power required to move the liquid.
see here. You'll need to account for the efficiency of your pump which is determined by the pump design and where exactly on the pump curve your operating point is.
Then you'll want to include a motor service factor. In many industries, a value of 1.15 is used. So if your pump requries 100 HP at the shaft (after accounting for the pump efficiency), then you would size your motor off of a service requirement of 115 HP.
Many times, though, motors will be sized to ensure they are not overworked (and therefore prone to failure and damage due to overheating) by sizing the motor based on the hydraulic power calculated using run-out flow condition (that is, the point on the pump curve furthest to the right) which will generally be much higher than the power required at the operating point. This is of course not making very efficient use of your motor, and may lead to a shortened operating life, but to some people it's worth it not to have to worry about your motor throughout any operational condition.
Operation - does the pump actually work at 200 lpm at 10 bar at all times? Will you have methods to shut down the pump when the parts cleaning machine is not in use so that the pump doesn't dead-head for extended periods of time? Or will you have a reticulating line? Does the machine vary it's water usage at all? If so, what methods of flow control do you have, or have you determined that the machine will suffice in controlling it's own flow (i.e. restrict nozzles -> Higher head -> Lower Flow, open nozzles -> lower head -> more flow from pump, etc).
Just some things to think about.
