Oil Pressure - psid??
 

I always thought (be nice now...) engine oil pressure (always been turbine) was presented / given in straight psi - but doing some related research, I find 'limits' shown in psid.

Am I just confused (or stupid - or both....) - what gives?

Thanks much. :confused:

....differential

Yes, but differentialfrom what? I get the psid (differential) when referring to say, cabin pressure, but oil pressure?

I don't ever remember (or maybe just forgot...) the 'd' part when referring to oil pressure.

Gracias.

:ugh:

Google is your friend.
look for
coulton.com/beginners_guide_to_differential_pressure_transmitters.html

seer

In what context did you see this "limit" mentioned ? Were you supposed to read a number somewhere on a gauge or was it just a psid at which something takes place, e.g., a bypass valve opens or a cockpit warning is sent for a clogged engine oil filter ? This would be a number one doesn't need to know and you'd have to get a MTC manual to find it.

the diff pressure is normally the difference between the supplied pump pressure and the vent pressure of the bearing chambers

Looking at Type Certificate Data Sheet on GE90 engine (long story....) - Oil Pressure Limit(s) shows - Low Pressure (differential): 69 kPa (10.0 psid).

As I said, seems I have never seen oil pressure limits shown in psid - only psi.

Have never seen oil pressure indicators labeled psid always just psi.

Maybe 'new' EICAS indication is different.......

Thanks.