Xylem-McDonnell & Miller 193-A Combination Low Water Cut-Off & Pump Controller 163500

Description

Xylem-McDonnell & Miller 193-A Combination Low Water Cut-Off and Pump Controller

The McDonnell & Miller 193-A (Part Number 163500) is a combination low water cut-off and pump controller engineered specifically for steam boiler applications. This dual-function device integrates boiler protection and pump management into a single, reliable unit — simplifying installation and reducing the number of components required in your steam system.

Key Features

• Combination low water cut-off and pump controller in one unit
• Two snap-acting SPDT (Single-Pole Double-Throw) switches for independent pump and burner control
• Maximum working pressure: 150 PSI — suitable for a wide range of steam boiler applications
• Alternate tappings for flexible installation configurations
• Designed for steam boiler service
• Part Number: 163500

How It Works

The 193-A monitors boiler water level continuously. When the water level drops to the pump-on level, the first SPDT switch activates the feed pump to restore water. If the water level continues to fall to the low-water cut-off point, the second SPDT switch shuts down the burner, protecting the boiler from dangerous dry-fire conditions. When water is restored to a safe level, normal operation resumes automatically.

Application

• Steam boilers in commercial and industrial heating systems
• Boiler rooms requiring combined pump control and low water protection
• Retrofit or replacement on existing steam boiler installations
• Systems where alternate tapping locations are required for optimal placement

Why Choose the McDonnell & Miller 193-A

McDonnell & Miller, a trusted Xylem brand, has been a leader in boiler protection controls for over a century. The 193-A combines proven float-operated technology with rugged construction to deliver dependable, long-lasting performance in demanding steam boiler environments. The dual snap-acting SPDT switches provide positive, reliable switching action, and the alternate tapping options give installers the flexibility needed for a variety of boiler configurations.