Description
Continuous-Duty Shop Air, 24/7 — Schulz 8 HP Rotary Screw Air Compressor (27 CFM, 230V)
Reciprocating compressors are built for intermittent use — run one all day and it overheats, wears out, and starves your tools for air. The Schulz 8 HP rotary screw compressor (SKU 970.3891-0) is designed for 100% continuous duty, delivering a steady 27 CFM of clean, cool, low-pulsation air for production environments that run all shift. With a 60-gallon ASME tank and 230V three-phase power, it drops in as the backbone of a busy shop’s air system. Sizing a screw compressor to your actual demand matters — call or text CET at 586-210-0555 before ordering and we will confirm the right model for your CFM and electrical service.
✓ 100% continuous-duty rotary screw airend • ✓ 27 CFM steady delivery • ✓ Up to 125 psig • ✓ Low noise, low pulsation • ✓ 8 HP / 230V 3-phase
SKU: 970.3891-0 • Motor: 8 HP • Air Delivery: 27 CFM • Power: 230V 3-PH • Tank: 60-gallon ASME tank
Max Pressure: 125 psig • CET Verified • Call or text 586-210-0555 — confirm sizing before ordering
Overview
At a Glance
Specifications
Tech Specs
| SKU | 970.3891-0 |
| Motor | 8 HP |
| Air Delivery | 27 CFM |
| Max Working Pressure | 125 psig |
| Electrical | 230V / 3-Phase / 60 Hz |
| Compressor Type | Rotary screw, oil-flooded, air-cooled |
| Tank | 60-gallon ASME horizontal |
| Dimensions (L × W × H) | 35" × 42" × 18" |
| Weight | 390 lb |
Common Questions
Frequently Asked Questions
- Why choose rotary screw over a piston compressor?
- Rotary screw compressors run continuously without overheating, deliver steady low-pulsation air, run quieter, and last far longer under heavy use. Piston (reciprocating) units are better for intermittent light-duty work; for a shop that runs air most of the day, a screw compressor is the right tool.
- How much CFM do I actually need?
- Add up the CFM demand of every tool that runs at once, then add headroom for leaks and future growth. This 8 HP model delivers 27 CFM. Undersizing causes pressure drops and short-cycling; oversizing wastes energy. Call or text 586-210-0555 with your tool list and CET will size it correctly.
- What electrical service does it require?
- This unit is wired for 230V / 3-Phase / 60 Hz. Confirm your shop’s available voltage and phase before ordering — a 460V three-phase unit will not run on 230V service and vice versa. If you are unsure, call or text 586-210-0555.
- Do I need an air dryer with it?
- For most production air — especially finishing, painting, and instrument air — yes. A refrigerated dryer downstream removes moisture that would otherwise rust piping and ruin finishes. CET can match a Schulz ADS dryer to this compressor’s output; call or text 586-210-0555.
All Screw Models
Find the Right Schulz Screw Compressor
The Schulz rotary screw line spans 8 to 50 HP in 230V and 460V configurations. Every model is CET Verified. Not sure which fits your demand and electrical service? Ask for a CET sizing match.
| Motor | Air Delivery | Tank | Power | SKU | Order |
|---|---|---|---|---|---|
| 8 HP | 27 CFM | 60 gal | 230V 1-PH | 970.3980-0 | Order |
| 8 HP | 27 CFM | 60 gal | 230V 1-PH | 970.3890-0 | Order |
| 8 HP | 27 CFM | 60 gal | 230V 3-PH | 970.3891-0 | Current |
| 8 HP | 27 CFM | 60 gal | 230V 3-PH | 970.4075-0 | Order |
| 8 HP | 27 CFM | 60 gal | 460V 3-PH | 970.3891-460 | Order |
| 8 HP | 27 CFM | 60 gal | 460V 3-PH | 970.4075-460 | Order |
| 10 HP | 35 CFM | 120 gal | 230V 3-PH | 970.3902-0 | Order |
| 10 HP | 35 CFM | 120 gal | 460V 3-PH | 970.3902-460 | Order |
| 15 HP | 51 CFM | 120 gal | 230V 3-PH | 970.3455-0 | Order |
| 15 HP | 51 CFM | 60 gal | 230V 3-PH | 970.3454-0/F | Order |
| 15 HP | 51 CFM | 60 gal | 460V 3-PH | 970.3454-460 | Order |
| 15 HP | 51 CFM | 120 gal | 460V 3-PH | 970.3455-460 | Order |
| 20 HP | 74 CFM | 120 gal | 230V 3-PH | 970.3903-0 | Order |
| 20 HP | 74 CFM | 120 gal | 460V 3-PH | 970.3903-460 | Order |
| 25 HP | 89 CFM | 80 gal | 230V 3-PH | 970.2840-S | Order |
| 25 HP | 89 CFM | 80 gal | 460V 3-PH | 970.2840-460 | Order |
| 25 HP | 92 CFM | 120 gal | 230V 3-PH | 970.3904-0 | Order |
| 25 HP | 92 CFM | 120 gal | 460V 3-PH | 970.3904-460 | Order |
| 30 HP | 113 CFM | 120 gal | 230V 3-PH | 970.3907-0 | Order |
| 30 HP | 113 CFM | 120 gal | 460V 3-PH | 970.3907-460 | Order |
| 40 HP | 89 CFM | 80 gal | 230V 3-PH | 970.3233-S | Order |
| 40 HP | 89 CFM | 80 gal | 460V 3-PH | 970.3233-460 | Order |
| 40 HP | 150 CFM | 120 gal | 230V 3-PH | 970.3977-0 | Order |
| 40 HP | 150 CFM | 120 gal | 460V 3-PH | 970.3977- 460 | Order |
| 50 HP | 207 CFM | Base-mounted | 230V 3-PH | 970.3458-0 | Order |
| 50 HP | 207 CFM | Base-mounted | 460V 3-PH | 970.3458-460 | Order |
All models rated to 125 psig max working pressure. Available in 230V and 460V three-phase (and 230V single-phase on select 8 HP units). Call or text 586-210-0555 for a CET sizing match.
Why Buy From CET
The CET Difference
- Over 20 years supplying industrial compressed-air equipment — we match customers to the right compressor the first time.
- Real technical support before and after the sale — call or text 586-210-0555. For screw-compressor sizing and electrical, we recommend a quick call before ordering.
- Fast fulfillment and freight coordination — call or text 586-210-0555 to confirm availability and delivery.
- Complete air systems — we stock the matching dryers, filters, and tanks so your system is right the first time.
- The best order communication in the industry — updates at every step, and a heads-up in advance in the rare case of a delay.
Still Deciding
Not Sure Which Compressor Fits Your Shop?
Call before you order. CET’s technical team will confirm whether the 8 HP / 27 CFM model matches your air demand, duty cycle, and electrical service in a 5-minute call. Call or text 586-210-0555.
