Universal CNG Compressor, 40 HP, Flow Rate 57 SCFM, Inlet 7 psi to 5000 psi

This natural gas compressor is a robust, air-cooled, four-stage reciprocating unit designed to deliver up to 5,000 PSI (414 bar.g) discharge pressure. Built on the W120H-AL compressor block, this machine is suitable for high-pressure CNG applications, gas recovery systems, and industrial gas compression operations.

Specifications:

Job Number: 20111308

Serial Number: 8003578

Compressor Type: URGT120-40NG / C3

Compressor Block Number: H21191001

Configuration: W120H-AL, air-cooled, reciprocating

Number of Compression Stages: Four

Inlet Pressure Range: 0–7 PSI (1 bar.g)

Delivery Pressure Range: 700–5,000 PSI (100–414 bar.g)

Direction of Rotation: Counterclockwise (viewed from drive end)

Operating Speed Range: 600–1,200 RPM

Displacement: 98.1 m³/hr @ 1200 RPM (≈57.7 CFM @ 1200 RPM)

Safety Valve Settings:

1st Stage: 10.0 bar.g (145 PSIG)

2nd Stage: 37.2 bar.g (540 PSIG)

3rd Stage: 161.5 bar.g (2,342 PSIG)

Final Stage: 10% above working pressure

Lubrication System:

Force-feed lubrication to crankshaft bearings

Controlled splash lubrication to cylinders

Crankshaft-driven oil pump with full-flow replaceable canister oil filter

Dimensions & Weight:

Length: 1,053 mm (41.5 in)

Width: 1,074 mm (42.3 in)

Height: 1,008.5 mm (39.7 in)

Dry Weight: 365 kg (805 lbs)

Design Highlights:

The W120H-AL compressor features a “W” form with three cylinders: one double-acting low-pressure piston for stages 1 and 2, and single-acting cylinders for stages 3 and 4. It uses a pedestal-mounted cooling fan that pulls air through the aftercooler/intercooler assembly, maintaining optimal temperatures. Stage-specific relief valves protect the compressor from over-pressure conditions.

Condition:

The unit was decommissioned in 2022. It was operational but would not compress above 2,000 PSI. The third stage requires maintenance/repair.

Applications:

Ideal for CNG refueling stations, natural gas processing, high-pressure gas transfer, and industrial gas systems where a multi-stage air-cooled reciprocating compressor is required.

We have all the manuals and schematics for the unit.

Pre-purchase inspections are welcomed during normal business hours upon appointment scheduled in advance. We would be happy to provide a complimentary transportation pick up from DFW Airport and back if you want to fly in and see/send someone to inspect the item in person. In addition, we can do FaceTime / Teams/Zoom calls to go over the item in person for any domestic /international procurement. Please be mindful that we are in Dallas and therefore are on the US Central Time (CT) for any communication arrangements.

Shipping Arrangements: The unit is in our yard, South of Dallas, Texas. We can assist with shipping arrangements, and when properly scheduled, we will provide loading service at no additional charge.

Payment: Payment in full FOB for our yard in South Dallas is required for equipment procurement. We prefer to see /meet the purchaser to ensure we can provide adequate after-sales support to set your project up for success. We will require a verifiable Cashier check as a payment if you are planning to come in person. We will require a wire transfer in full, with the transaction cleared in the company account, before releasing the equipment to any 3rd party shipper companies. We are here to help and make this transaction as simple as possible, but we will take all necessary measures to protect ourselves and you.

Feel free to call/contact Gas Equipment 4 Sale with any questions; we will be happy to jump on the call and see if / how procuring those units can help you meet your project needs.