I measured the pressure it took to get the metal ball to just uncover the outlet in the old bolt. I used a small paperclip with an end poking into the oil bolt inlet and the pressure on a letter scale. Midrange of readings is about 7 1/2 oz. How might this translate to lbs/sq in? Assuming an oil inlet of about 1.1mm diameter (not measured).

 

what does the ball sit on? a seat?
Once the ball is off the seat it's flow that moves it not pressure.

 

[QUOTE]Originally posted by gernby
[B]Consider water pouring out of a hose.

 

[QUOTE]Originally posted by Prolene
[B]I measured the pressure it took to get the metal ball to just uncover the outlet in the old bolt.

 

 

RT is correct. I checked the bolt schematic in the manual and the check ball merely needs to be unseated for oil to flow. 28 psi is required.

 

[QUOTE]Originally posted by Prolene
[B]RT is correct.

 

pressure drop is directly related to flow ...... no flow and you get no pressure drop ......... extreme case would be plugging the nozzle, now you got no flow and the ball sit on it's seat regardless of the upstream pressure. oil's incompressable right?

 

[QUOTE]Originally posted by RT
[B]pressure drop is directly related to flow ...... no flow and you get no pressure drop ......... extreme case would be plugging the nozzle, now you got no flow and the ball sit on it's seat regardless of the upstream pressure.

 

here we go again... no flow and you get 100% pressure drop, ie, nothing coming out of the nozzle. As I said before, as the hole gets narrower & narrower so does the pressure drop more and more. A plugged hole is just an extreme case where the pressure drop is 100%.

... and, of course, Brent would have to surface to muddle up things . Care to explain why pressure differential is the opposite of pressure drop? Where are you measuring?