N2GEN-FLEX Series Site and Utility Requirements – South-Tek Systems

Applies to: N2GEN-FLEX Series industrial PSA nitrogen generators — models 4TS, 6TS, 8TS, 10S, 12S, and 14S.

Proper site preparation is required to ensure safe operation, maintain system performance, and allow access for service. Before startup, confirm that the installation area, electrical supply, compressed air supply, and utility connections meet the requirements below.

Installation environment

Install the system indoors in a clean, dry, well-ventilated area.
Ambient operating temperature must remain between 40°F and 90°F (4.44°C to 32.2°C).
Performance derating applies at temperatures above 90°F.
The skid must be installed no more than 5° off level.
The area should be reasonably clear of dust and debris.
Maintain at least 3 feet of clearance on all sides of the skid for service and maintenance access.

System footprint and weight

Confirm the installation area can accommodate the system footprint, doorway access, and floor loading before delivery.

Cabinet and skid dimensions: 68 × 30 × 70 inches (L × W × H). The compact design passes through a standard 36-inch doorway.
Integrated nitrogen storage tank: 60 gallon (skid-mounted) on the 4TS, 6TS, and 8TS; 120 gallon (floor-mounted) on the 10S, 12S, and 14S.

Model	4TS	6TS	8TS	10S	12S	14S
Shipping weight (lb)	785	910	1035	985	1110	1235

▲ Attention — Floor Loading Confirm the floor can support the installed system, including the nitrogen storage tank and its contents. Floor-mounted models (10S, 12S, 14S) require a slab capable of supporting the 120-gallon tank arrangement. Shipping weights are shown above; installed operating weight may differ.

Ventilation and oxygen safety

⚠ Warning — Asphyxiation Hazard Nitrogen is odorless and displaces oxygen. In an enclosed or poorly ventilated space, a nitrogen release can lower oxygen below safe levels without warning. Install the generator in a room with adequate ventilation, and consider an oxygen-depletion monitor where ventilation is limited or where local code requires one. This equipment is intended for installation and use by trained personnel only.

Electrical requirements

Power supply: 110-240 VAC, 50/60 Hz, single phase
Maximum current draw: 2.1A
Electrical connections should be reviewed and completed by an electrician authorized to work in the installation jurisdiction.

Compressed air requirements

Air quality

Compressed air supplied to the generator must comply with ISO 8573-1, Class 1.4.1.
Air quality, pressure stability, and proper upstream treatment are critical to generator performance and long-term component life.

ℹ Note — What Class 1.4.1 Requires ISO 8573-1 Class 1.4.1 means Class 1 particulate, Class 4 water (pressure dew point at or below +37°F / +3°C), and Class 1 oil (total oil content at or below 0.01 mg/m³). The generator's built-in 3-stage inlet filtration (5 micron, 0.01 micron, activated carbon) addresses particulate and oil, but not moisture. Incoming air must be dried upstream, typically with a properly sized refrigerated dryer, to meet the Class 4 dew point.

Air demand

Air consumption depends on the target nitrogen purity: higher purity requires more air per unit of nitrogen. The values below are the average required air flow (SCFM) at the reference condition of 100 PSIG inlet air pressure and 90°F inlet air temperature.

Model	95%	97%	99%	99.5%	99.9%	99.99%	99.999%
4TS	23.2	20.8	18.3	17.0	14.7	12.9	12.0
6TS	33.7	30.6	26.0	24.6	21.7	19.0	17.9
8TS	38.1	34.9	28.8	26.8	23.8	21.3	20.7
10S	58.3	52.6	45.1	43.0	37.0	32.3	30.6
12S	69.5	64.0	54.1	49.7	44.3	39.2	36.6
14S	79.5	71.8	62.6	59.5	51.3	45.9	43.5

Air flow is an average and may vary about ±10% during operation. For a quick range, the minimum-to-maximum air flow spans the 99.999% column (lowest) to the 95% column (highest) for each model.

Correction for site conditions

The air demand and nitrogen output values are rated at 100 PSIG inlet pressure and 90°F inlet air temperature. A PSA generator performs better at higher inlet pressure and derates at higher inlet air temperature. Apply the correction factors below when site conditions differ from the reference.

Inlet pressure (PSIG)	90	100	110	120	130	140
Correction factor	0.84	1.00	1.05	1.13	1.25	1.33

Inlet air temp (°F)	90	95	100	105
Correction factor	1.00	0.90	0.80	0.70

Sizing the air supply

▲ Attention — Peak Air Demand The SCFM values above are average feed air. During PSA bed cycling the momentary peak demand is higher, so size the air supply piping and air receiver to deliver up to 4 times the average feed air flow, keeping inlet pressure stable through each cycle. If the piping run from the air receiver to the generator exceeds 50 feet, consult a piping contractor for correct line sizing.

A typical supply arrangement includes:

An air compressor sized to the average air demand at your target purity, with headroom.
An air receiver sized to buffer the cyclic peak draw (see the peak air note above).
A dryer that meets the ISO 8573-1 Class 4 dew point.
Supply piping at least the inlet size, clean and free of debris, kept as short and direct as practical.

Typical compressed air supply arrangement (compressor → receiver → dryer → N2GEN-FLEX)

Mounting and placement

The generator is skid mounted and should be placed on a suitable flat surface capable of supporting the system.
Bolt holes are included on the bottom of the skid if anchoring is desired.
Floor mounting is optional unless required by site-specific conditions or local code.

Utility connections

Confirm connection locations and orientations before final placement. Refer to the model detail drawing included with the system documentation for exact layout and connection locations.

Package general arrangement drawing: Download the N2GEN-FLEX Package General Arrangement (PDF) for the full package layout, connection schedule, and dimensions by configuration.

Compressed air inlet: 0.75" NPT female
Nitrogen outlet: 0.5" NPT female
Condensate drain: 0.25" OD connection

On floor-mounted configurations with the 120-gallon nitrogen storage tank, additional tank connections may be present based on the model configuration.

Verify utility connections are complete and leak free.
Verify the electrical supply matches the system requirements.
Confirm the installation area meets clearance and ventilation requirements.
Confirm incoming compressed air meets the required quality specification.
Schedule virtual training or on-site commissioning with South-Tek Systems prior to operation.

Important considerations

▲ Attention N2GEN-FLEX systems are factory tuned to perform to the required operating conditions. Do not adjust valves, regulators, or PLC settings without consulting South-Tek Systems.

Need help? South-Tek Systems Service — Phone: (910) 415-1880 · Open a support ticket at support@southteksystems911.zendesk.com or through the Help Center.