The SUNTEC E 1001 oil pump incorporates a pressure regulating valve with cut-off function. Its design is basically similar to that of J pumps, but E pumps can also be used with kerosene and heavy oil.
The gear set draws oil from the tank through the built-in filter and transfers it to the valve that regulates the oil pressure to the nozzle line. All oil that does not go through the nozzle line will be dumped through the valve back to the return line in two pipe installation or, if it is a one-pipe installation, back to the suction port in the gear-set. In that case, the by-pass plug must be removed from the return port and the return port sealed by steel plug and washer.
The valve also has a cut-off function as follows : During starting period when the gear-set speed is increasing, all the oil passes through a special flat on the piston, back to the return. Once the speed reaches a certain value and the flow can no longer pass through this flat, then the pressure increases rapidly overcoming the valve spring force and opens the valve.
During the stop sequence, the gear-set speed slows down and the valve closes when the gear-set capacity is lower than the flat flow. The cut-on and cut-off speeds depend on the gear-set size and set pressure
|1 or 2 stage||1|
|Oil temperature [°C]||0 - 90 °C in the pump|
|Pressure Gauge Ports||1/8"|
|Valve Function||Pressure regulation without cut-off|
|Strainer||45cm2 - opening size: 550 µm|
|By Pass plug||Insterted in return port for two-pipe system; to be removed for one pipe operation.|
|Gear Size||E6 1001|
|Description||E6 ND 1001|
|Factory pressure setting [bar]||20 bar|
|Nozzle Pressure Range||14-30 bar|
|Inlet Pressure||1.5 bars max. (Heavy Oil)|
|Return Pressure||1.5 bars max.|
|Rated Speed||3600 rpm max.|
|Number of stages||1|