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NRV is Non Return Valve which is prevents to liquid flood back to the suction line over the impeller or other else.
In boiler feed water line the NRV is normally installed between Pump and stop valve if the line is short and an another NRV is installed at boiler entrance and after stop valve if the line is long or pump is 10 to 15 m away from the boiler.
Pump Stations
Pump stations
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Auto recirculation valve is used to ensure a minimum flow is maintained through the pump all the time. Recirculation valves are mostly combined with Non Return Valves in the main flow pipe , when flow is established through the discharge line which means that the NRV is open , recirculation valve is closed through a mechanical linkage between the NRV and recirculation valve . Usually the recirculation valves develops passing through it after a period of time due to wear out in the contact points between the NRV and recirculation linkages.
Pipe-to-soil potential is the potential of a pipeline at a given location.
According to Wikipedia there is the Trans-Alaska Pipeline System (TAPS) which has twelve pump stations. The pipeline is eight hundred miles and forty eight inches in diameter.
fuel pump relay location
show me the picture of the water pump location
Injection pump, driver side of engine.Original lift pump location is the back side of the fuel filter housing.Retrofit location is inside the fuel tank.Injection pump, driver side of engine.Original lift pump location is the back side of the fuel filter housing.Retrofit location is inside the fuel tank.