Screw Compressor ATMOS SEC 221 input 22 kW, capacity 3.9 m³/min, 8 bar, without tank, LOGIK 26-S, 7-year warranty

Product detailed description

Screw Compressor ATMOS SEC 221

The ATMOS SEC 221 is a 22 kW industrial compressor with the ATMOS B 100 high-speed block and a pressure selection of up to 13 bar. Output of 3.9 m³/min at 8 bar (10 bar → 3.2 / 13 bar → 2.4 m³/min). IP 55, ATMOS R1 suction control.

The B 100 high-speed block via Multi-V belt is more compact and lighter than the slow-speed AB 240 (545 vs 540 kg, comparable weight) and adds a 13 bar pressure option for high-pressure applications. Noise level 72 dB(A). Dimensions 1300×920×1270 mm.

SEC 221 Configuration

Specifically, this variant consists of:

✓

Screw compressor Atmos B 100 screw block — generous power reserve.

—

Frequency converter Fixed-speed mode (direct drive)

—

External air receiver Connection to an existing pressure network (air receiver 270/500/900 l separate)

—

External dryer Condensing dryer as an external unit (optional)

Main features

SEC 221 Construction and Features

ATMOS B 100 screw block via Multi-V belt. Block speed 6293 rpm at 8 bar (5375 at 10 bar, 4637 at 13 bar). ATMOS R1 suction control — proportional, stepless regulation between 0–100% capacity without idling. 22 kW IE3 motor (90.6% efficiency).

Design and Noise Level — 72 dB(A)

Comfort version — soundproof steel housing, noise level 72 dB(A). Motor protection class IP 55 (higher protection against dust and water than IP 23 on the SEC 220).

SEC 221 Technical Data

BASIC DATA — SEC 221
Nominal motor power	22 kW (IE3 efficiency)
Operating pressure (variants)	8 / 10 / 13 bar
Nominal air delivery	3.9 / 3.2 / 2.4 m³/min
Rated voltage	400 V / 50 Hz
Motor speed	2940 min⁻¹
Engine efficiency	90.6 % (IE3)
Motor protection class	IP55
Noise level (ISO 2151)	72 dB(A)
Oil fill volume	11 l
Compressed air outlet	G 1"
Hedging	63 A
The temperature of the working environment	+5 ÷ +40 °C
Weight	545 kg
Dimensions (L × W × H)	1300×920×1270 mm
SEC 221 CONFIGURATION
Housing	Noise-reducing steel (Comfort)
Screw block	Atmos B 100 (ATMOS in-house production, 3D measurement)
Frequency converter	None (fixed-speed mode)
Control unit	LOGIK 26-S (microprocessor) + RS-485
ATMOS Care	Integrated service interval monitoring
Guarantee	7 years UNLIMITED — regardless of operating hours
Manufacturer	ATMOS Chrást, CZ (since 1899)

Illustrative photo SEC 221

Who is SEC 221 suitable for

SEC 221 is purchased by industrial operations with a pressure option of 13 bar or with higher demands on protection class (dusty environment, moisture). Typical customer: foundries, glassworks, manufacturers of pressure fittings, operations with pneumatic ejection or shaping.

Typical applications

• Foundries — pneumatic hammers and pressure products
• Glassworks — high-pressure glass blowing
• Production lines with pneumatic logic in dusty environments
• Pressure test rooms (pneumatic testing, 13 bar)
• Paint shops with high-pressure spray guns
• Construction and concrete plants with pneumatic hammers

7-year UNLIMITED warranty — unique in the Czech Republic

"We simply trust our machines! The best way to express confidence in the quality of our machines is to provide a SEVEN-YEAR UNLIMITED WARRANTY."

• No flat-rate payments
• No service contracts
• 7 years worry-free
• 7 years of operational certainty
• Online management via the ATMOS Plus app

Optional equipment — built-in heat recovery

For SEC 221, integrated heat recovery is available as an optional accessory. The recovery heat exchanger captures the heat produced by the compressor during air compression and transfers it to a water circuit (heating, DHW heating).

• Recovers up to 72% of the input electrical energy
• Built-in solution — integrated directly into the body
• Investment return typically within 1 year of operation
• Surcharge CZK 57,375 excl. VAT (CZK 69,424 incl. VAT)

Price according to the current ATMOS price list valid from 1. 12. 2025. For a non-binding calculation proposal, contact us.

Machine control — LOGIK 26-S

LOGIK 26-S controls the compressor with proportional suction regulation R1. Continuous modulation of output between 0–100% according to actual consumption — economical operation even with intermittent consumption. ATMOS Care interval monitoring. RS-485 (Modbus) for remote communication.

• Monitoring operating hours
• Master/Slave mode for 2 compressors as 1 source
• Activity and fault logs (50 days history)
• Data transmission via RS-485 bus (Modbus)
• ATMOS Care — automatic reporting of service intervals

Accessories — option: Supervisory control system ARCHON

For compressor stations with 3, 5, or 9 compressors, the supervisory control system ARCHON is available. The overall efficiency of a multi-compressor station is fundamentally influenced by the way they are controlled.

• Up to 10 daily programs — various operating modes for weekdays / weekends / holidays
• 3 control methods: by operating hours (even wear), by fixed priorities (backup units), for maximum efficiency (energy saving)
• Touch SIEMENS SIMATIC panel with clear display of all compressor statuses
• Communication with LOGIK 26-S via Ethernet / RS-485 for remote management

ARCHON is an optional accessory — for a non-binding calculation proposal for a compressor station, contact us.

Related models and alternatives

If the SEC SEC221 does not exactly match your operation, consider the following alternatives:

Frequently asked questions

What is the difference between SEC 300 and SEC 302?

SEC 302 has a higher output (5.2 vs 4.5 m³/min at 8 bar) for the same 30 kW motor thanks to the new Atmos A 150 screw block (vs B 100 in SEC 300). It also has significantly lower noise levels — 65 dB(A) vs 75 dB(A). SEC 302 is the premium 30 kW version.

What does Vario mean in the model name?

Vario indicates a compressor with a Danfoss VLT frequency converter, which continuously regulates the speed of the screw unit according to current consumption. It eliminates idling and saves 20–30% of electrical energy compared to a fixed-speed machine. Vario versions are ideal for operations with intermittent or variable consumption.

Can I choose a different working pressure than the standard 8 bar?

Yes.

SEC 220 is available in 8 or 10 bar versions. SEC 221 and all larger models (SEC 300+, SEC 302+, SEC 372+) are available in 8 / 10 / 13 bar variants. At higher pressure, the output in m³/min decreases — see the technical parameters table.

Do SEC compressors have an integrated air receiver?

No. All SEC models (150 to 372) are supplied as free-standing industrial machines. The pressure vessel (air receiver) is an external accessory — available in variants of 270 / 500 / 900 / 1000 l. We recommend sizing the receiver to 4–6× the nominal flow rate per minute to equalize pressure peaks.

What screw block is in individual models?

SEC 220 → Atmos AB 240 (slow-running). SEC 221 and 300 + Vario → Atmos B 100 (high-speed, 4–6 thousand rpm via belt). SEC 302 and 372 + Vario → Atmos A 150 (new premium block with higher performance and lower noise level).

What is ARCHON?

ARCHON is an ATMOS master control system for coordinating 3, 5, or 9 compressors as a single compressed air source. It offers 10 daily programs + 3 control methods (operating hours / fixed priorities / highest efficiency).

Including Ethernet for remote management.

What does heat recovery enable?

The compressor generates compression heat, which normally dissipates into the surroundings through cooling. The ATMOS heat recovery exchanger captures this heat and transfers it to the water circuit (heating, domestic hot water heating). Up to 72% of input electrical energy can be recovered — payback period typically 1 year.

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