Product Overview
The NTPA300 liquid nitrogen plunger pump is a horizontal single-acting triplex reciprocating cryogenic pump with a rated maximum input power of 300 brake horsepower, engineered for flexible, low-footprint oilfield nitrogen pumping service. The pump adopts a three-piece modular layout consisting of power end, cryogenic cold end and intermediate baffle assembly for easy disassembly, inspection and on-site overhaul. The power end is equipped with a forged one-piece crankshaft supported by heavy-duty roller bearings, delivering stable torque transmission under continuous high-load cryogenic pumping conditions. The stainless steel cold end assembly resists liquid nitrogen cryogenic temperature embrittlement and erosion-corrosion. The intermediate baffle integrates plunger wiper rings and scraper rings to prevent cryogenic fluid migration into the power end crankcase oil system. This pump supports three interchangeable plunger sizes under a fixed 1.5-inch stroke, covering wide flow and pressure ranges from ultra-high pressure 25,000 psi low-flow pumping to medium-pressure large-flow nitrogen injection, ideal for coiled tubing nitrogen workover, well testing, small-scale nitrogen fracturing and EOR operations.
Main Technical Specifications
| Model No. | Stroke Length | Plunger Diameter | Single Stroke LN₂ Displacement | Max LN₂ Flow Rate | Connecting Rod Adjustment | Crankcase Rating | Max Discharge Pressure | Suction / Discharge | Service Type | Max Input Power | Valve Design | Fluid End Material |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NTPA300 | 1.5" | 1.500"–2.500" | 28.15 in³ | 30 GPM | Adjustable | 300 BHP @ 400 RPM | 25,000 PSI | 2" NPT / 1.5" NPT | H2S Sour / Non-Sour | 300 BHP (224 kW) | Standard API-674 Poppet / Optional Flat Valve | 304 Stainless Steel (Cryogenic Grade) |
Core Features & Benefits
300 BHP compact triplex design, small footprint, ideal for truck/trailer/skid-mounted mobile nitrogen units
Compact horizontal design with minimal floor space requirement, fits easily into standard truck or trailer-mounted nitrogen unit layouts.
Fixed 1.5" stroke with three interchangeable plunger diameters, wide coverage of flow & pressure working conditions
Switch between 25,000 PSI ultra-high pressure low-flow and medium-pressure high-flow by changing plunger size, covering wide operating envelope.
Dual drive design: integrated gear reduction transmission or direct motor crankshaft connection by removing gearbox
Detachable gear reducer supports two drive configurations, compatible with hydraulic motor or diesel engine direct drive setups.
Alloy welded integrated power frame + solid forged crankshaft, outstanding tensile and impact resistance
Welded alloy steel power frame with forged one-piece crankshaft and heavy-duty roller bearings ensures long-term structural integrity under continuous heavy pumping loads.
Low-friction roller bearing layout, high reliability and long service life under continuous cryogenic pumping duty
Roller bearing-supported connecting rods and crosshead assembly minimizes power loss and heat generation during sustained high-speed cryogenic operation.
Full stainless steel cold end assembly, resistant to liquid nitrogen cryogenic temperature and fluid erosion
Complete 304 stainless steel fluid end with cryogenic-grade packing and valve assemblies prevents low-temperature embrittlement and corrosion from LN₂ service.
Universal interchangeable cryogenic seals compatible with mainstream cold end spare parts, reduce maintenance expense
Standardized seal dimensions ensure compatibility with widely available cryogenic pump seal kits, reducing inventory requirements and downtime.
Modular power end + cold end + baffle split structure, fast disassembly for field inspection and repair
Three-piece modular design enables separate removal of power frame, cold end and intermediate baffle without complete pump teardown.
Max discharge pressure up to 25,000 psi, meets ultra-high pressure well testing & stimulation requirements
25,000 PSI rated discharge pressure capability enables deep well nitrogen injection, formation testing and small-scale fracturing operations.
Stable triplex pulsation output, less flow fluctuation to protect downstream high-pressure piping and instruments
Triplex plunger configuration produces smoother discharge flow than single or duplex pumps, reducing pressure surge risk to downstream equipment.
Typical Applications
Ultra-high pressure liquid nitrogen pumping for deep well pressure testing & small-scale nitrogen fracturing
Coiled tubing workover: plug milling, sand cleanout, nitrogen lifting and temporary well killing
Nitrogen huff-puff EOR stimulation for conventional and heavy oil reservoirs
Mobile trailer-mounted nitrogen pump unit core power equipment for remote field operations
Sour gas well intervention with H₂S/CO₂ corrosive formation fluid environments
Wellbore nitrogen displacement, temporary well abandonment and pipeline purging
Low-flow high-pressure cryogenic fluid transfer for laboratory and oilfield testing services
Standard Delivery Package
Complete NTPA300 pump power frame
Cryogenic stainless steel cold end assembly
Forged crankshaft & roller bearing set (pre-installed)
Interchangeable plunger set (specify diameter at order)
Cold end seal kit (installed + one spare set)
API-674 poppet valve set (installed + one spare set)
Installation & operation manual (English)
Product inspection certificate
Quality Warranty & After-Sales Service
Standard warranty covers 18 months from shipment or 12 months from first commissioning (whichever expires first), against all manufacturing and material defects. Wearing parts such as plunger packing, pump valves, valve springs and seals are not covered under warranty. Our engineers provide remote troubleshooting and on-site technical support for overseas projects upon request. Customized NACE MR-0175 sour service cold end and special plunger sizes are available for specialized well conditions.
Advantages Over Conventional Medium & High Power Nitrogen Pumps
Compact 300 BHP triplex structure occupies less installation space, perfect for small mobile nitrogen trailers
The NTPA300's compact triplex layout reduces footprint compared to conventional quintuplex or larger triplex pumps, enabling installation on compact skid, truck or trailer frames without sacrificing power output.
Three interchangeable plunger sizes realize flexible switching between ultra-high pressure low-flow and medium-pressure large-flow operations
By simply changing plunger diameter across 1.500" to 2.500" range, the same pump frame can serve both 25,000 PSI stimulation jobs and high-rate nitrogen displacement operations, eliminating the need for separate pump units.
Detachable gear reducer supports two drive layouts, greatly simplifies customized nitrogen unit design
The integrated gearbox can be removed for direct hydraulic motor or diesel engine drive connection, while the standard configuration with gear reducer enables compatibility with conventional PTO or electric motor prime movers — all on the same pump frame.
Forged crankshaft + roller bearing power end withstands long-duration continuous pumping without premature wear
The one-piece forged alloy steel crankshaft and heavy-duty roller bearing assemblies are engineered for continuous 300 BHP sustained operation, outlasting conventional cast crankshaft pumps in extended nitrogen pumping campaigns.
Stainless steel cold end with universal spare seals cuts procurement lead time and on-site maintenance downtime
The 304 stainless steel fluid end uses industry-standard seal dimensions, enabling fast sourcing of replacement seals from multiple suppliers without custom manufacturing delays.
Triplex plunger layout delivers smoother flow output than duplex pumps, reduces pipeline pulsation damage
Three-plunger configuration reduces discharge flow fluctuation amplitude, minimizing pressure surge stress on downstream high-pressure piping, valves and instrument loops compared to single or duplex pump designs.
Lower overall weight and smaller footprint, easy transportation and rig floor deployment for temporary workover jobs
The optimized power-to-weight ratio of the NTPA300 allows one-skid transport and rapid rig-up for short-term coiled tubing nitrogen workover campaigns, reducing mobilization logistics cost.
FAQ
Q: Can the built-in gear reducer be removed for direct hydraulic motor drive?
A: Yes, the integrated gear reduction box is detachable, hydraulic or electric drive motors can be directly connected to the crankshaft after gearbox removal.
Q: Are cold end sealing spare parts compatible with common cryogenic pump accessories?
A: The cold end sealing assembly adopts universal industry standard dimensions, interchangeable with most mainstream cryogenic pump cold end seal kits.
Q: Can this pump be integrated into compact truck-mounted nitrogen units?
A: The pump features a compact overall layout with small footprint, fully compatible with skid, truck and trailer integrated arrangements.
Q: What is your production lead time?
A: Standard pump bodies ship within 12-22 working days; fully customized NTPA300 nitrogen pump assemblies with special cold ends take 25-40 working days based on configuration complexity.
Get Custom Datasheet & Factory Quote
We manufacture full series of high-pressure cryogenic liquid nitrogen pumps and supporting nitrogen unit accessories with strict factory load & hydrostatic testing procedures. Send your pump duty parameters, required flow-pressure range and drive configuration to our engineering team for a detailed technical datasheet and factory direct ex-factory price quotation.
