Quincy QNRG Series Reciprocating Gas Compressor is engineered for economical gas boosting needs. The QNRG ensures optimum performance and high volumetric efficiency. The QNRG optional gas unloaders result in easier compressor start-up and provides the ability to handle changes in capacity requirements. The Quincy QNRG is uniquely engineered to meet even the most demanding natural gas applications.

Standard Features for QNRG Reciprocating Gas Compressors

•	Series includes 2-34 hp single stage compressor & 13-33 hp two-stage compressor models with up to 225 mcfd
•	Cast-iron construction of cylinders, pistons, crankcase, flywheel and body
•	Advanced design pressure lubrication system, re-buildable connecting rods and low-lift valves
•	Designed for quick and easy maintenance – features heavy-duty, disc-type valves that are accessible without having to remove the cylinder head, unhook the discharge lines or unbolt the intercoolers
•	Optional gas unloaders
•	Rifle-drilled, counter-weighted, one-piece crankshaft reduces vibration, extends life of bearings and wrist pins
•	Tapered roller bearings are oversized and easily adjusted for trouble-free operation
•	Pressure lubrication with positive displacement oil pump to assure constant lubrication of all critical wear areas
•	Spin-on oil filter for convenient changes and clean lubrication
•	Aluminum connecting rods with oil passage allow for full flow lubrication to piston pins to extend compressor life
•	Steel valve discs use a unique low lift design and cast-iron bumpers for increased efficiency and less downtime
•	Cast-iron valve seats are lapped for a total seal, eliminating the need for a discharge line check valve
•	All yellow metals have been replaced with steel or aluminum for corrosion resistance

Quincy QNRG Series Reciprocating Gas Compressor
Quincy QRNG Single-Stage Compressors
Model	Bore & Stroke	Min RPM	Max RPM	CFM Displacement @ Max RPM	Max Inlet pressure	Max Discharge pressure	Max BHP
216 NG	3x3x2.5*	400	900	18.4	50	150	5.5
240 NG	4x4x3*	400	900	39.3	50	125	10.9
270 NG	4.5x4.5x4*	400	900	66.3	50	125	18.3
4125 NG	4.5x4.5x4**	400	900	132.5	50	125	34.5

Quincy QNRG Series Reciprocating Gas Compressor
Quincy QRNG Two-Stage Compressors
Model	Bore & Stroke	Min RPM	Max RPM	CFM Displacement @ Max RPM	Max Inlet pressure	Max Discharge pressure	Max BHP
325 NG	4.5x2.5x3*	400	900	24.9	30	500	13.2
340 NG	5.25x3x3.5*	400	900	39.5	30	500	20.00
350 NG	6x3.25x3.5*	400	900	53.7	30	400	23.8
370 NG	6x3.25x4*	400	900	61.6	30	400	27.7
5120 NG	6x3.25x4**	400	900	123.2	15	325	33.0

* Two-cylinder
** Four-cylinder

For more information on the Quincy QNRG Series Reciprocating Gas Compressor or any other Quincy product: Call 1-800-764-9793 or use
our Contact Form.

Quincy QNRG Series Reciprocating Gas Compressors • 2-34 hp Gas Compressors • 13-33 hp two-stage • Suction to 50 psig, discharge to 500 psig

Standard Features for QNRG Reciprocating Gas Compressors

Quincy QNRG Series Reciprocating Gas Compressors
• 2-34 hp Gas Compressors
• 13-33 hp two-stage
• Suction to 50 psig, discharge to 500 psig