ATLAS COPCO 1091-0394-01 REPLACEMENT PRESSURE SWITCH ROTARY SCREW COMPRESSOR

Description:

The Atlas Copco 1091-0394-01 pressure switch is used in rotary screw air compressors to monitor and control system pressure by automatically starting and stopping the compressor at set pressure points. Commonly installed in Atlas Copco ZR and ZT series compressors, it ensures proper pressure regulation and protects the system from over-pressurization or inefficient operation. Maintenance teams and system integrators use this pressure switch for compressor control, system protection, and replacement of worn or failed pressure switches.

Applications:

The Atlas Copco 1091-0394-01 pressure switch is commonly used in industrial compressed air systems, rotary screw compressors, and pneumatic applications where automatic pressure control is required. It is widely deployed in manufacturing plants, workshops, and facilities relying on consistent compressed air supply for tools and processes.

Technical Specifications:

• Manufacturer Part Number (MPN): 1091-0394-01
• Product Type: Pressure Switch
• Application: Rotary screw air compressors (Atlas Copco)
• Pressure Range: ~4–150 PSI
• Differential Range: ~2–25 PSI
• Maximum Pressure: Up to ~300–475 PSI (variant dependent)
• Connection: 1/4" NPT
• Enclosure Type: NEMA 1
• Function: Cut-in / cut-out pressure control
• Media Compatibility: Air, oil, water, gases (non-corrosive)
• Design Type: Industrial pressure control (similar to Allen-Bradley Bulletin 836 style)
• Application Environment: Industrial compressed air systems

Common Replacements:

• Atlas Copco 1091-0450-00
• Atlas Copco 1089-9214-01
• Atlas Copco 1089-0347-01