Xylem FS7-4E Explosion Proof Industrial Liquid Flow Switch 1-1/4" NPT

The Xylem FS7-4E is an explosion-proof industrial liquid flow switch designed for hazardous environment applications requiring NEMA 7 (Class I, Group C or D) or NEMA 9 (Class II, Group E, F, or G) ratings. This heavy-duty flow switch provides reliable flow monitoring and control for commercial and industrial steam boilers, HVAC systems, and process applications.

Key Features:

• 1-1/4" NPT male connection fits pipe sizes from 1-1/4" to 16"
• Explosion-proof brass construction with sealed tube design
• Single pole, double throw (SPDT) snap switch for versatile control
• Magnetic switching mechanism eliminates the need for bellows
• Trimmable bronze paddle can be customized to suit specific application needs
• Sensitivity adjusting screw allows easy flow rate adjustment
• Maximum operating pressure: 300 psi (21 kg/cm²)
• Temperature range: 32°F to 300°F (0°C to 149°C)
• Voltage rating: 120/240V

The FS7-4E is part of McDonnell & Miller's proven FS7 series, engineered to provide continuous protection against low water conditions and satisfy pump control needs in demanding commercial and industrial environments. The explosion-proof housing makes this switch ideal for hazardous locations where flammable gases or combustible dust may be present.