Triplex Single Actig back and forth piston pumps including  3NB-350, 3NB-500, 3NB-600, 3NB-800, 3NB-1000, 3NB-1300A, 3NB-1300D, 3NB-1300G, 3NB-1600, 3NB-2200.

The series of pumps is produced strictly according to API Spec 7K, the Equipment Specification of well drilling and repairing, and performed the Ex-Work test under tge specification thereof.