NPT fittings as orifice?
NPT fittings as orifice?
(OP)
Would you guys be kind enough help out?
The 8 GPM gear pump will supply ISO 150 synthetic oil -
Cold start ~ 40F (1510 cst / 7000 SUS)
normal operating temp ~ 170F ( 35cst / 165 SUS)
- to "flood" (not pressure feed) 3 roller bearings from a common manifold.
Each bearing requires a different flow rate with nominal rate as follows:
Brg A = 0.75 - 1.0 gpm
Brg B = 1.5 - 2.5 gpm
Brg C = 3.5 - 5.0 gpm < Extra flow is not a problem
The lines will be about equal length and the discharge nozzles can be sized as required.
Any suggestions on beginning nozzle sizes? Ideally, NPT fittings would make the best restriction but tubing or drilled restrictors can be used.
THANKS!!
Thanks!!
The 8 GPM gear pump will supply ISO 150 synthetic oil -
Cold start ~ 40F (1510 cst / 7000 SUS)
normal operating temp ~ 170F ( 35cst / 165 SUS)
- to "flood" (not pressure feed) 3 roller bearings from a common manifold.
Each bearing requires a different flow rate with nominal rate as follows:
Brg A = 0.75 - 1.0 gpm
Brg B = 1.5 - 2.5 gpm
Brg C = 3.5 - 5.0 gpm < Extra flow is not a problem
The lines will be about equal length and the discharge nozzles can be sized as required.
Any suggestions on beginning nozzle sizes? Ideally, NPT fittings would make the best restriction but tubing or drilled restrictors can be used.
THANKS!!
Thanks!!
Keep the wheels on the ground
Bob
showshine@aol.com





RE: NPT fittings as orifice?
Can you not heat the oil up prior to starting the unit.
Best regards.
Scalleke
RE: NPT fittings as orifice?
That's why I'm asking you experts!
Keep the wheels on the ground
Bob
showshine@aol.com
RE: NPT fittings as orifice?
C = .250" dia 4.71 gpm
B = .177" dia 2.35 gpm
A = .112" dia 0.94 gpm
for water at room temperature, the manifold pressure would be ~17.5 psi
Mike Halloran
NOT speaking for
DeAngelo Marine Exhaust Inc.
Ft. Lauderdale, FL, USA
RE: NPT fittings as orifice?
Is that corrected for the oil viscosity or just water flow?
Thanks
Keep the wheels on the ground
Bob
showshine@aol.com
RE: NPT fittings as orifice?
I assume the gear pump has an internal relief valve; that should take care of the cold starts.
Mike Halloran
NOT speaking for
DeAngelo Marine Exhaust Inc.
Ft. Lauderdale, FL, USA
RE: NPT fittings as orifice?
Keep the wheels on the ground
Bob