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Structure Features
1.Triplex single-acting reciprocating pump
2.Reasonable structure for easy repair and operation
3.Bi-metal liner
4.Available to match with different suction systems
5.Matching with different power according to operations
6.Equipped with shock-resistant, necessary spare parts, special tools
Model Triplex single-acting
piston pump Stroke length Φ180mm
Rated power 350HP(261kW) Suction pipe dia. Φ203mm
Input rotating speed 605rpm Discharge pipe dia. Φ76mm
Overall dimensions 3100*2086*2015mm Weight 8086kg
Main Technical Parameters
Based on 90% mechanical efficiency and 100% volumetric efficiency
Pump speed
（spm）
Cylinder liner diameter （mm)
110 120 130 140 150 160
Theoretical displacement （L/s）
135 11.5 13.7 16.1 18.7 21.5 24.4
115 9.8 11.7 13.7 15.9 18.3 20.8
Rated pressure
Mpa 20 16.8 14.5 12.5 10.8 9.5
3NB-350 Triplex Single Action Piston Pump for Oil Well
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