Square D 9037HG31 Closed-Tank Float Switch with 2-1/2" NPT Threaded Bushing

The Square D 9037HG31 is a heavy-duty closed-tank float switch designed for controlling liquid levels in boiler feed tanks, condensate tanks, and closed vessel applications. This complete assembly features a horizontal side-mount design with a 2-1/2" NPT threaded bushing for secure tank installation.

Key Features:

• Two-pole snap action switch rated for power circuits: 2 HP @ 115 VAC, 3 HP @ 230 VAC single phase
• Contact voltage rating: 120-600 VAC, 125/250 VDC with 10A capacity
• Adjustable control range: 6.0" to 11.5" water level change
• Field-reversible contacts: configurable to close on liquid rise or fall
• 90-degree offset float rod with 7" offset for optimal clearance
• Stainless steel construction: 304 SS float (2.58" diameter x 7.13" length), 316 SS rod
• Durable components: cast iron bushing, brass connector, Buna-N packing
• NEMA 1 enclosure with external float position indicator pointer

Temperature and Pressure Ratings:

• Operating temperature: -22°F to 220°F ambient
• Liquid temperature: up to 215°F with Buna-N seal, 250°F with optional Viton seal
• Maximum tank pressure: 50 PSI
• Designed for 1,000,000 mechanical cycles and 100,000 electrical cycles

This switch is ideal for makeup water control systems paired with solenoid valves, or pump control applications for condensate transfer. The assembly includes the complete float, rod, bushing, and electrical switch. UL Listed, CSA Certified, and CE Certified for reliable industrial performance.

Note: Due to the 90° offset rod design, this assembly will not fit through a 2" full coupling. Right float position configuration.