Trailer pressure in. Site pressure out. Built for high-volume CNG.
The PRS-G8000 is NuBlu Energy’s flagship glycol-bath CNG pressure reduction system. It takes gas straight from CNG trailers down to user-defined site pressure with the heating capacity, redundancy, and automation needed for continuous high-volume delivery.

Overview CNG delivered from trailers arrives at high pressure and drops sharply on its way to site pressure. That pressure drop cools the gas – fast enough to freeze regulators, valves, and downstream equipment if the heat isn’t put back in. The PRS-G8000 solves that with a 2 MMBTU glycol bath heater sized for continuous delivery up to 8 MMSCFD.
Redundant HP and LP control valve circuits keep gas flowing even during maintenance. User-definable outlet PSVs and onboard fuel gas mean the unit ships ready to drop on site, hook up, and run.

Key Specifications:

• Heater Type – Glycol bath, 2 MMBTU
• Flow Rate – 0.5 to 8 MMSCFD
• Inlet Pressure – Up to 5,000 psig (CNG trailer service)
• Outlet Pressure – User-defined; set per application
• Pressure Control – Redundant HP and LP control valve circuits
• Overpressure Protection – User-definable outlet PSVs
• Fuel Gas – Onboard fuel gas system
• Automation – Fully automated PLC + HMI; remote monitoring via Ewon
• Footprint – Trailer-mounted, under 30 ft, approx. 43,000 lbs
• Design Standards – ASME Sect. VIII Div. 1, B31.3, NEC, NFPA
• Skid – Single skid, fully assembled and FAT tested in shop

High-Volume Glycol Bath Heating 2 MMBTU glycol bath heater sized for continuous 8 MMSCFD delivery. Keeps gas above hydrate and freeze conditions even during sustained high-flow operation.

Redundant Pressure Control Two parallel HP control valve circuits and two parallel LP control valve circuits. Run on one, service the other. No shutdown required for routine valve maintenance.

Mobile, Trailer-Mounted Package Trailer-mounted footprint under 30 ft. Roughly 43,000 lbs. Designed to be moved between sites and operated wherever CNG trailers are staged.

Fully Automated PLC-based control system with HMI and remote monitoring via Ewon. Trailer swap logic, multi-trailer mode, and start-up sequencing all handled in software.

Onboard Fuel Gas Self-supplied fuel gas for the heater burner. No external fuel hookup required to start producing heat.

Built for Demanding Applications Used in dual-fuel frac, e-frac, drilling, power generation, pipeline integrity work, and peak shaving. Engineered for the duty cycles and uptime those operations demand.

Built and Tested In-Shop Final assembly, FAT, loop checks, and HMI commissioning happen in our shop. Issues get caught in the shop, not on your site.

Typical Applications
• Dual-fuel frac and e-frac fleets
• Drilling rig fuel gas supply
• Mobile and temporary power generation
• Pipeline integrity work and pipeline pack-up
• Peak shaving and standby gas service
• Remote site CNG-to-line pressure conversion

What’s Included
• Trailer-mounted skid with glycol bath heater, control valves, and process piping
• Redundant HP and LP control valve circuits
• User-definable outlet PSVs
• Onboard fuel gas system
• PLC, HMI, and field instrumentation, wired and tested
• Trailer-swap and multi-trailer control logic
• Cause-and-effect diagram, control narrative, and FAT package
• ASME-stamped pressure vessels, B31.3 piping
• Installation, commissioning, and start-up procedure
• Recommended spare parts list and pricing

Engineering and Aftermarket Support Every PRS-G8000 ships with a complete engineering package: P&IDs, GA drawings, electrical load lists, and a full O&M manual. Critical spares – including control valve trims and instrumentation – are stocked at our shop for fast response.

Field service, troubleshooting, and remote diagnostics are handled by the same team that designed and built the unit.

PRS Family at a Glance
Glycol Bath (PRS-G Series)
For high-volume delivery with continuous, reliable heating:
• PRS-G8000 → up to 8,000 MSCF/d
• PRS-G4000 → up to 4,000 MSCF/d
• PRS-G2000 → up to 2,000 MSCF/d
• PRS-G750 → up to 750 MSCF/d

Catalytic Heater (PRS-C Series)
For compact, flame-free efficiency at mid-size and smaller loads:
• PRS-C720 → up to 720 MSCF/d
• PRS-C360 → up to 360 MSCF/