145 to 300 kW Triplex Range
The 3ZB-145, 3ZB-185 and 3ZB-300 step input power 145, 185 and 300 kW, so a dosing skid and a high-rate acidizing crew draw from the same triplex crank family with different rod and power ends.
Assembly Parts
Series of plunger pump
The 3ZB triplex plunger pump spans input power from 145 kW on the 3ZB-145 to 300 kW on the 3ZB-300, running at 280 SPM on the smaller two and 360 SPM on the 300. Stroke grows from 135 mm on the 3ZB-145 to 152.4 mm on the 3ZB-185 and 160 mm on the 3ZB-300, with plunger diameters of 90, 100 and 115 mm selectable on the largest model and displacement per stroke from 3.0 to 4.97 L. It is the reciprocating end for high-pressure fluid delivery, acidizing, fracturing and chemical dosing, where a triplex crank pushes constant plunger flow rather than the rising and falling curve of a centrifugal unit.
Core advantages
Designed around the operating requirement.
280 to 360 SPM, Fixed 4.60 Ratio
The 145 and 185 run 280 SPM and the 300 runs 360 SPM through a 4.60 reducing case (2.03 on the 300 build), setting the crank-to-power-take-off speed the driver is matched to.
135 to 160 mm Strokes
Stroke length climbs 135 mm, 152.4 mm and 160 mm across the three models, and a longer stroke at the same SPM raises displacement per stroke without pushing plunger speed past its seal-life limit.
90, 100 and 115 mm Plunger Selectivity
The 3ZB-300 accepts 90, 100 or 115 mm plungers and the 3ZB-185 a 100 or 115 mm barrel, letting the same pump be re-geared for pressure or flow between jobs by changing the plunger package.
3.0 to 4.97 L per Stroke
Displacement per stroke runs 3.18 L on the 3ZB-145, 3.58 and 4.75 L on the 3ZB-185 and 3.0, 3.57 and 4.97 L on the 3ZB-300, the figure used to size job rate against the chosen plunger and SPM.
Triplex Flow for Injection and Acidizing
Three plungers on one crank deliver a steadier pulse than a single-acting simplex end, which smooths discharge pressure on high-pressure injection and acidizing lines where a centrifugal would lose prime at the dead-head end.
| Product | Series of plunger pump |
|---|---|
| Product line | Assembly Parts |
| item | 3ZB-145 pump | 3ZB-185 pump | 3ZB-300 pump | |
| outset reducing case radio | 4.60 | 4.60 | 4.60（2.03） | |
| kW Max. input power | 145 | 185 | 300 | |
| rpm Max. SPM | 280 | 280 | 360 | |
| mm Plunger stroke | 135 | 152.4 | 160 | |
| mm Plunger dia. | 100 | 100，115 | 90，100，115 | |
| L Displacement per stroke | 3.18 | 3.58,4.75 | 3.0，3.57，4.97 | |
Application
Where this equipment is used.
- High-pressure fluid delivery for cementing, acidizing, fracturing and chemical dosing with triplex plunger flow.
- Model selection by power: 3ZB-145 at 145 kW, 3ZB-185 at 185 kW or 3ZB-300 at 300 kW input.
- Constant plunger displacement rather than rising reciprocating surge from crank-driven triplex geometry.
- Plunger and displacement options: 90, 100 and 115 mm diameters with 3.0–4.97 L per stroke on the largest model.
- Retrofit and new-build supply for truck-mounted and fixed cementing spreads.
- Continuous duty where SPM and stroke are matched to the pressure and rate programme.
Next step
Send the operating requirement.
For a useful technical response, include the target well conditions, operating depth or pressure, expected quantity, destination and any required configuration.
Send an InquiryConfiguration
Options for a matched equipment scope.
Available configurations can be matched to the equipment model, operating conditions and project requirements.
- Model: 3ZB-145, 3ZB-185 or 3ZB-300 selected against the pressure and displacement requirement.
- Plunger set: diameter (90, 100, 115 mm) and stroke matched to the rate envelope.
- Drive interface: input power, SPM and reduction ratio confirmed against the prime mover.
- Fluid end: material and valve arrangement matched to the working medium.
- Spares: plunger packing, valves and seats listed for the operating period.
- Documents and after-sales for Series of plunger pump: operation manuals, factory test report and first-period spares are included; on-site commissioning and crew training can be arranged.
Buyer questions
Frequently asked about this equipment.
Buyers evaluating the plunger pump series usually ask about input power, pressure and cementing duty.
What is the core application of Plunger Pump in oilfield operations?
The 3ZB triplex plunger pump is the reciprocating high-pressure end for oilfield injection work: reservoir water injection, well fracturing, acidizing stimulation, chemical dosing and pipeline pressure testing. Input power steps 145, 185 and 300 kW across the 3ZB-145, 3ZB-185 and 3ZB-300, at 280 SPM on the smaller two and 360 SPM on the 300, with displacement per stroke from 3.0 to 4.97 L, so the same triplex crank family covers a dosing skid and a high-rate acidizing crew.
What is the difference between triplex and quintuplex plunger pumps?
Triplex pumps are the compact, lower-cost option for conventional water injection and general fluid delivery. Quintuplex pumps stagger five plungers to cut flow pulsation and smooth pressure output, which matters on high-pressure injection and chemical-dosing duty where triplex ripple would accelerate valve and packing wear. Choose triplex for standard waterflood, quintuplex for high-pressure or metered service.
Can the pump adapt to corrosive and sand-containing complex media?
Yes. The fluid end — plungers, valves, liners and manifold — is chosen against the produced-water analysis, not by a default spec. For high-salinity or sour service we quote stainless or duplex fluid ends with ceramic plungers; for sand-laden injection the valve and liner materials are upgraded against the particle report. Send the water quality sheet with the inquiry and the wetted-end materials are quoted to that analysis.
How to ensure stable and safe operation under high pressure?
The pump carries over-pressure shutdown, motor overload protection and low-lubrication alarm as standard, and the suction and discharge dampeners are sized to cut pipeline vibration on the high-pressure stroke. The sealing system is rated to the working pressure, and the wetted-end materials are chosen against the water analysis so packing life matches the duty rather than the calendar.
Can the Series of plunger pump be customized in working parameters and function scope?
Yes. The configuration is settled against the job programme before the order: power grade (3ZB-145, 3ZB-185 or 3ZB-300), plunger diameter and stroke set to the required pressure and rate, wetted material for the working medium, drive interface and explosion-proof grade are matched to the service, then written into the quotation and the factory test report.
Procurement information
Ordering this equipment.
Commercial terms are confirmed in the quotation for the exact configuration, quantity and destination.
Certification & standards
Built to API 674/675 at the Jingzhou plant under ISO 9001:2015 quality management; each 3ZB unit is run on the plant test loop with pressure built against a calibrated valve tree before dispatch. The certificate scope is listed in the quotation.
Documentation
Pump manuals, performance curves and pressure-test reports are supplied; the fluid-end assembly drawings are provided for the client's maintenance team. Wear-part cross-reference lists are included.
Lead time
Confirmed in the quotation according to configuration, quantity and destination.
Warranty & after-sales
Manuals, conventional spare parts and remote technical guidance are included; on-site commissioning and operator training can be arranged on request.
Payment & delivery
Payment schedule, Incoterms, port and packaging are agreed in the sales contract.
Spare parts
A recommended spare-parts list for the first operating period is provided with the quotation.
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