UsedSpecifications
ManufacturerANGI
ModelNG-050-E/S-4-Z
ConditionUsed
Capacity75 SCFM @ 9 PSI inlet to 5,000 PSI discharge
Pressure Rating5,000 PSI
Gas ServiceCNG, Natural Gas
Previous ServiceCNG compression service; 14,000 compressor hours with full maintenance records
Hydro Test Expiry2025
LocationWaxahachie, TX, United States
Stock #GE4S-1239
Description
Complete turnkey CNG fill station built around an ANGI NG-050-E/S-4-Z compressor rated for 75 SCFM at 9 PSI inlet to 5,000 PSI discharge. The package includes a 50 HP natural gas compressor, gas dryer skid, priority fill panel (model PR-100-Custom), and a dual motor starter panel with transformer, all skid-mounted and field-proven as a matched system. The compressor has 14,000 hours with full maintenance records, and all pressure release valves were recertified in August 2025.
Model: NG-050-E/S-4-Z
Capacity: 75 SCFM
Inlet Pressure: 9 PSI
Max Discharge Pressure: 5,000 PSI
Motor: 50 HP
Cooling: Integrated
Mounting: Skid-mounted
Ideal for: Time-fill or fast-fill configurations
See listing →
Model: PR-100-Custom
Function: Directs gas flow for priority vehicle filling or storage replenishment
Includes: High-pressure regulators, manual shut-off valves, and pressure gauges
Rated Pressure: Up to 5,000 PSI
Includes:
Integrated control panel
Desiccant towers
Electric motor-driven cooler
Removes: Moisture and contaminants from the natural gas stream
Skid-mounted: For easy integration into CNG systems
Condition: Fully plumbed and wired for plug-and-play operation
Panel Type: Dual 50HP Motor Starter Panel
Voltage: 480V 3PH / 60Hz
Full Load Amps: 162.4A
Includes Transformer: Hevi-Duty HS5F5AS
Primary: 240/480V
Secondary: 120/240V
Power Rating: 5 kVA
Enclosure: UL Type 3R (Outdoor-rated)
UL Listed: CM 266985
Package Features:
Professionally matched and field-proven components
Suitable for public, private, or fleet fueling applications
The system supports time-fill and fast-fill configurations
Rated for continuous-duty operation
UL-Listed panels and industrial-grade skids
Questions buyers ask
What capacity and discharge pressure does it actually deliver?
This ANGI NG-050-E/S-4-Z compressor is rated for 75 SCFM at 9 PSI inlet to 5,000 PSI discharge. The listing does not specify whether this is continuous-duty rating or peak capacity, so confirm with the seller whether this flow rate applies to sustained time-fill operation or intermittent fast-fill cycles. CNG compressors typically see capacity derating under continuous duty or when filling from storage rather than directly from the inlet line.
What drive, power and cooling does it require?
The system uses a 50 HP motor powered by a 480V 3PH / 60Hz dual motor starter panel rated for 162.4A full load. The compressor has integrated cooling, though the listing does not specify whether this is air-cooled or water-cooled, which affects site installation requirements. The package includes a Hevi-Duty 5 kVA transformer for control power and a UL Type 3R outdoor-rated enclosure.
What are the running hours and what has been rebuilt?
The compressor has 14,000 hours with full maintenance records. The listing states that all pressure release valves were recertified in August 2025, but does not detail whether valve or ring work has been performed. Ask the seller for the maintenance records to verify whether cylinder heads, piston rings, or discharge valves have been replaced at typical service intervals.
What should I inspect on a used compressor before buying?
Verify discharge valve condition by checking for blow-by or excessive heating during a witnessed run test, and inspect piston rings by monitoring interstage pressures against the manufacturer's curve. Pull oil samples to check for metal particulate, examine the dryer desiccant for contamination or channeling, and verify that all PRVs hold at set pressure. The seller has maintenance records—review them for timing of valve replacements, ring changes, and bearing service, then cross-check actual interstage pressures and vibration levels against baseline readings from those service events.
General guidance for this type of equipment. Ask about this specific unit in your inquiry — the seller answers directly.
Inspection, shipping & payment
Inspection
Pre-purchase inspections are welcome during normal business hours by appointment arranged in advance. We can provide complimentary transportation from DFW Airport and back if you would like to send someone to see the equipment in person. We can also walk through the item over a video call for domestic or international buyers. We are on US Central Time.
Shipping and loading
The equipment is located at our yard south of Dallas, Texas. We can assist with shipping arrangements.
Loading is provided at no charge for equipment under 15,000 lb when scheduled in advance. Equipment over 15,000 lb requires a crane, which is arranged and paid for by the buyer.
Payment
Payment in full is required FOB our yard in South Dallas. A verifiable cashier's check is accepted for collection in person. For release to a third-party shipper we require a wire transfer cleared in our account before the equipment leaves the yard.
Terms set by Gas Equipment 4 Sale.