cummins engine fuel injection pump , Iran

The Cummins engine fuel injection pump is available in two types: inline pump and distributor pump. The P and MW series inline pumps are used for heavy engines such as NTA855 and KTA19. The maximum injection pressure in Cummins inline pumps varies between 800 and 1200 bar. The VE series distributor pump is designed for smaller engines like 4BT and 6BT. The injection pressure in these models reaches 650 to 850 bar. The number of plungers in a 6-cylinder inline pump equals 6 with a diameter of 10 to 12 millimeters. The plunger diameter in the 6BT model equals 10 millimeters with a stroke of 12 millimeters. The NTA855 model has a 12 millimeter plunger with a stroke of 15 millimeters. The precision machining tolerance between plunger and barrel reaches 0.002 millimeters. The plunger surface roughness after polishing reaches below 0.05 micrometers Ra.

Injection timing on the Cummins pump is adjusted using a timing screw and centrifugal spring. The advance angle on 6BT engines is approximately 12 degrees before top dead center. This angle reaches 14 degrees on the NTA855 and 16 degrees on the KTA19. The fuel rack performs linear movement of plungers to adjust engine speed. The mechanical or electronic governor maintains constant speed on diesel generators. The fuel delivery rate per cylinder on Cummins pumps is controlled with a tolerance of 1.5 percent. The delivery valve with an opening pressure of 3 to 5 bar prevents fuel dribbling. The allowable fuel viscosity entering the pump is between 1.5 and 6 centistokes at 40 degrees Celsius. The Cummins injection pump requires periodic adjustment every 5000 hours for optimal performance. The service life of an original pump under standard conditions is estimated at approximately 12,000 operating hours.You can order and buy cummins engine fuel injection pump from Iran by contacting us through whatsaap and email.
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