Nitrogen Pumping Unit Direct Fired

Our Hydra Rig trailer-mounted nitrogen units can be customized to fit your operational needs—in both non-fired and direct-fired configurations.


Direct-Fired Trailer-Mounted Nitrogen Pumping Unit

Our Hydra Rig™ trailer-mounted nitrogen units can be customized to fit your operational needs—in both non-fired and direct-fired configurations. These pumpers use the Hydra Rig direct-fired vaporizer, triplex pump, cold ends, and boost pumps to provide gaseous nitrogen at pressures up to 15,000 psi (103 MPa).

The most severe operating conditions are no match for our patented cold ends, which are proven to perform in harsh environments. Simple operation and control is provided by the Merlin™ automated vaporizer controls that are unique to our equipment. The controls of the pumping unit can be configured to match each individual operating environment and can be located in a climate-controlled cabin or externally on the side of the unit. Operation of unit control valves can be done manually or remotely using electric actuators.

Power is supplied by a Cummins QST30 (1,350 hp) deck engine with an Allison S8610M transmission. Liquid nitrogen is stored at -321 °F (-196 °C) in a 2,987-gallon (11 306-L) vacuum-insulated tank. All units are available with a CSA B620 TCRN Certificate for Transportation of Dangerous Goods on Canadian roads.

We can also incorporate magnetic filtration into the hydraulic coolant, engine coolant, fuel, lube oils, and liquid nitrogen circuits, improving reliability and reducing maintenance costs.


Direct-Fired Pump Specifications


Cold End Diameter

Maximum Flow

Maximum Pressure


1.875 in. (47.63 mm)

320,000 scfh (8410 m³/hr)

15,000 psi (103 MPa)


2.00 in. (50.80 mm)

360,000 scfh (9461 m³/hr)

13,000 psi (103 MPa)


2.00 in. (50.80 mm)

400,000 scfh (10 512 m³/hr)

15,000 psi (103 MPa)


2.52 in. (64.00 mm)

640,000 scfh (16 819 m³/hr)

15,000 psi (103 MPa)


2.875 in. (73.03 mm)

840,000 scfh (22 075 m³/hr)

11,200 psi (77 MPa)


3.00 in. (76.20 mm)

900,000 scfh (23 652 m³/hr)

10,000 psi (69 MPa)


3.25 in. (82.55 mm)

1,000,000 scfh (26 280 m³/hr)

8,800 psi (61 MPa)

  • Hydra Rig 660K/840K Direct-Fired Trailer-Mounted Nitrogen Pumping Units Flyer

  • Hydra Rig Nitrogen Products Brochure

Related Products

Frac Pumpers

Designed for the increasing demands of today’s shale applications where duty cycles are extended, and reliability is key.

Learn more

Combo Frac/Blender

Rolligon combination fracturing blender units (a.k.a. "kitty fracs" or "combo fracs/blenders") have long been used to service low-production fields in which stimulation jobs are small and require an economical solution.

Learn more

Intervention and Stimulation Aftermarket Solutions

Reduce total cost of ownership of your coiled tubing, stimulation, acidizing, wireline, sand handling, and cementing equipment with our aftermarket solutions.

Learn more

Related Tools

Intervention and Stimulation In stock Inventory

Coiled tubing, nitrogen, pressure pumping, cementing, and wireline in-stock inventory ready to ship worldwide
Learn more