Guest
Could somebody please tell me how I can vary (increase/decrease)the pressure in a pump/motor setup to compensate for the high and low pressures at the various operating speeds.
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owlscreech
Mechanical
Why not a pump discharge control valve that controls pressure?
- Thread starter
- #4
Variable speed control will change the head of the pump in accordance with:
Q: flow
H: head
P: Power
N: speed
subscript
n:nominal
x:selected spped
Qx/Qn=Nx/Nn
Hx/Hn=(Nx/Nn)^2
Px/Pn=(Nx/Nn)^3
You can get variable frequency control for all pump sizes allthough the (motor control) priciple may vary.
Grundfos (eg) deliver small variable frequency control pumps with build in control, check their web page:
Best regards
Morten
Q: flow
H: head
P: Power
N: speed
subscript
n:nominal
x:selected spped
Qx/Qn=Nx/Nn
Hx/Hn=(Nx/Nn)^2
Px/Pn=(Nx/Nn)^3
You can get variable frequency control for all pump sizes allthough the (motor control) priciple may vary.
Grundfos (eg) deliver small variable frequency control pumps with build in control, check their web page:
Best regards
Morten
- Status
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