Hi
This is driving me crazy!
Does anyone know why these websites appear to contradict one another or is it different for car fuel pumps as opposed to water pumps? When the diaphragm is raised does the inlet valve open or close?
The lowering of the diaphragm makes the inlet valve of the fuel pump open. With this valve open, fuel is drawn from the gas tank and into the pump. At the same time, the lowering of the diaphragm closes an outlet valve.
Read more: How Car Fuel Pumps Work | eHow.com http://www.ehow.com/how-does_5004513_how-car-fuel-pumps-work.html#ixzz1rwSrcgdV
Or...
A vacuum is created inside the pump casing each time the diaphragm is raised (see figure below). This opens the inlet valve and seals the discharge valve allowing water and air to enter the pump. When the diaphragm is lowered the resulting pressure seals the inlet and opens the outlet valve purging the pump housing of water and air..
http://www.pumps-in-stock.com/diaphragm_pump_designs.html
I presume discharge is another name for outlet
This is driving me crazy!
Does anyone know why these websites appear to contradict one another or is it different for car fuel pumps as opposed to water pumps? When the diaphragm is raised does the inlet valve open or close?
The lowering of the diaphragm makes the inlet valve of the fuel pump open. With this valve open, fuel is drawn from the gas tank and into the pump. At the same time, the lowering of the diaphragm closes an outlet valve.
Read more: How Car Fuel Pumps Work | eHow.com http://www.ehow.com/how-does_5004513_how-car-fuel-pumps-work.html#ixzz1rwSrcgdV
Or...
A vacuum is created inside the pump casing each time the diaphragm is raised (see figure below). This opens the inlet valve and seals the discharge valve allowing water and air to enter the pump. When the diaphragm is lowered the resulting pressure seals the inlet and opens the outlet valve purging the pump housing of water and air..
http://www.pumps-in-stock.com/diaphragm_pump_designs.html
I presume discharge is another name for outlet
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