GPB-90/3NB （三缸） /5NB （五缸）系列往复高压活塞泵、柱塞泵、泥浆泵、高压注浆泵 ，理论流量 0.2 — 120m3/h，           压力3--80MPa。允许24小时连续工作。       3NB、5NB系列具有自吸能力。      主要零部件：机座（材料HT250）；泵体（材料：1Cr18Ni9Ti、2Cr13、 碳钢化镀镍-磷合金防腐层）经热处理，避免疲劳破裂；曲轴（材料：35CrMo、42CrMo）经调质氮化/中频淬火处理、强度大、硬度高、耐磨耐用；柱塞（材料：超性陶瓷、喷焊镍合金Ni60耐磨耐腐层）；盘根密封（采用进口芳纶或碳素纤维）。 阀组型式：锥阀、API阀，AR阀，耐磨阀等。经特殊处理，耐磨耐用。      适用于：岩土工程钻探，高压灌浆，高压注浆，高压旋喷地基处理，地质钻探，石油钻井钻探等生产工艺。       高岭土泥浆泵，泥浆泵，纯水泥浆泵，二氧化硅浆喷雾液泵。 Water flooding（injection） pump used in oil field Application: To be used as special pump such as water flooding pump used in oil field and mining field, hyper pressure pump, ejection pump, dephosphorizing pump, high pressure cleaning pump, moistening pump, spraying pump, flowing pump, thick mud pump, sludge pump, pump for liquified carbon dioxide, detergent sludge pump, chemical pump, hydraulic pressure pump, oil transition pump, sea water pump etc. Absorbing quintessences of domestic pump industries, it has characteristics in advanced design, compact structure and compact pump body, high efficiency, steady run, safe and reliable performance, simple operation, excellent manufacture and nice appearance. There is safety regulating valve in every type of such pump. Pressure can be regulated freely. Oil temperature and pressure are protected automatically. Assembly type: horizontal or vertical. Transition type: electric motor or diesel; There are 4 ways of speed regulation,ie: by gear box, belt wheel, electromagnetic or frequency-changing. Main parts: Machine seat (material used: HT250) Pump body (material used: 316, 1Cr18Ni9Ti, 2Cr13, Nickel-phosphorus alloy galvanized carbon steel layer) Heat treatment is applied to prevent fatigue crack. Crank shift (material used: 35CrMo, 42CrMo) Nitrogen hardening treatment is applied to attain strong strength, high hardness, durable and corrosion resistant feature. Plunger (material used: superior ceramic, Ni60 alloy nickel-coated wear resistant and anti-corrosive layer). Packing seal Imported imitating polyamide fiber（aramid fiber） or carbon constructional fiber are used. Splashing form of lubrication is used. Valve types: conical valve, plate valve, ARN valve and combined valves. They are wear resistant and anti-corrosive after special treatment. Every pump is equipped with safety regulating valve. Pressure of pump can be regulated freely. Alarm protection for temperature of lubricating oil and inlet and out pressure of the pump are equipped.