QZ3NB series include QZ3NB-22, QZ3NB-37, QZ3NB-75, QZ3NB-90, QZ3NB-150, QZ3NB-220, QZ3NB-350, QZ3NB-500, QZ3NB-650, QZ3NB-800, QZ3NB-1000, QZ3NB-1300, QZ3NB-1600, QZ3NB-1600H, QZ3NB-2200, QZ3NB-2200H. This series of drilling mud pump combined the advantages of home and abroad drilling mud pumps. The structure has the special features only, The usage is dependable, and the function is good. Come to advanced world standard of 90’s and 20centuries; is oil-field and the industrial and mining establishments choose to use first the drilling mud pump nowadays at home and abroad. QZ3NB series of drillling mud pumps is advanced at structure, revolve steady, weight light, the small volume, low speed, long stroke; Have the well imbedibility; wearing parts of long service life.

QZ3NB 650's specifications are as follows:
Model:                              QZ3NB-650
Type:                                Triplex Single Acting Piston pump
Rated power :                 650hp(485kw)
Rated speed:                 150 SPM 
Gear ratio :                      4.07 
Stroke Length:                203 mm 
Suction Inlet:                   Φ254 mm
Discharge Outlet:          Φ83m
Weights :                       13600 Kg

QZ3NB 800's specifications are as follows:
Model :                               QZ3NB-800
Type:                                  Triplex Single Acting Piston pump
Rated power:                    800hp(597kw)
Rated speed :                   130 SPM
Gear ratio:                          3.483
Stroke Length:                  273 mm
Suction Inlet:                     Φ254 mm
Discharge Outlet :            Φ102 mm
Weights:                             17200 Kg