McDonnell & Miller 193-1 Replacement Casting

The McDonnell & Miller 193-1 Replacement Casting is a critical structural component engineered specifically for the 193 Series Low Water Cut-Off and pump controllers. For technicians servicing high-pressure steam systems, this cast iron replacement body provides the necessary housing for the internal float and industrial-grade linkage. Unlike universal alternatives, the 193-1 is a genuine Xylem McDonnell & Miller part, ensuring strict adherence to the original manufacturer’s pressure ratings and dimensional tolerances. When a 193 Series unit shows signs of housing erosion or structural fatigue, replacing the casting is essential to maintain the integrity of the boiler pump control system and prevent dangerous low-water conditions.

This replacement casting for 193 Series is designed to integrate seamlessly with existing head mechanisms and 5A or 7B switch assemblies. It features precision-machined ports for 1-inch NPT equalizing pipes, facilitating a robust connection to the steam boiler water column. By utilizing this rugged heavy-duty float housing, contractors can restore a system’s reliability without the need for a full controller replacement. Whether you are dealing with a 193 or 193-A model, this casting ensures the mechanical float movement remains unobstructed, providing dependable industrial LWCO performance during peak operational demands.

• Direct OEM Compatibility: Verified fit for all McDonnell & Miller 193 Series models, eliminating field-modification risks.
• Rugged Construction: High-grade cast iron provides superior resistance to steam-side corrosion and thermal stress.
• Precise Tolerance: Maintains the exact pivot points and float clearance required for accurate magnet-to-switch actuation.
• Simplified Service: Allows for the reuse of functional internal components while addressing body-related leaks or damage.

Can this casting be used with the 93 Series controls?
While the 93 and 193 Series share similar float heads, the 193-1 casting is specifically bored and ported for the 193 Series configurations, which typically include gauge glass or tri-cock tappings found on water columns.

Does this include the flange gasket or mounting bolts?
This is the casting only. To ensure a pressure-tight seal, it is standard practice to use a new flange gasket and inspect or replace mounting hardware during the reinstallation of the float head.

When should a technician replace the entire casting instead of just the float?
If the interior walls show significant scale buildup that cannot be safely cleaned, or if there is visible "pincushioning" or thinning of the iron walls from chemical erosion, the casting must be replaced to prevent a catastrophic blowout.

This item is not eligible for free shipping.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.