McDonnell & Miller 157S-P Controller
The McDonnell & Miller 157S-P Controller (Part #175802) is a precision-engineered combination low water cut-off and pump controller designed for commercial and industrial steam boilers of any steaming capacity. As the direct replacement for the legacy McDonnell & Miller 157S, this unit integrates a manual reset mechanism to ensure rigorous safety protocols in the event of a low-water condition. Featuring a robust Monel bellows for superior corrosion resistance and high-pressure durability up to 150 PSI, the 157S-P utilizes snap-acting SPDT switches to maintain reliable pump control and alarm activation. The side ports with alternate tapping options facilitate versatile installation across various boiler configurations, making it a standard for contractors requiring dependable Xylem boiler control solutions.
Key Technical Benefits:- Dual Functionality: Manages both pump operation and low water cut-off (LWCO) safety functions within a single housing, reducing piping complexity.
- Enhanced Durability: The Monel bellows construction provides enhanced chemical resistance and longevity in demanding steam environments.
- Precision Switching: Equipped with snap-acting switches that eliminate "creep" and minimize arcing, ensuring a clean electrical break for pump and alarm circuits.
- Universal Application: Engineered to work with boilers of any steaming capacity, providing a versatile solution for diverse industrial steam boiler systems.
- Direct Retrofit: Seamlessly replaces existing McDonnell & Miller 157S units without requiring extensive manifold modifications.
What is the difference between the 157S and the 157S-P?
The 157S-P is the current production model and serves as the direct replacement for the 157S. It maintains identical mounting dimensions and functional specifications while incorporating the 175802 part number.
Can weight and pressure ratings handle high-pressure process steam?
Yes, the 157S-P is rated for a maximum pressure of 150 PSI. It is built with a heavy-duty float mechanism and Monel bellows specifically for high-temperature and high-pressure steam service.
How does the manual reset function impact system safety?
In a low-water event, the manual reset requires a technician to physically inspect the boiler and reset the controller before the burner can be fired again, preventing automatic cycling under unsafe conditions.
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.
McDonnell & Miller 157S-P Controller
The McDonnell & Miller 157S-P Controller (Part #175802) is a precision-engineered combination low water cut-off and pump controller designed for commercial and industrial steam boilers of any steaming capacity. As the direct replacement for the legacy McDonnell & Miller 157S, this unit integrates a manual reset mechanism to ensure rigorous safety protocols in the event of a low-water condition. Featuring a robust Monel bellows for superior corrosion resistance and high-pressure durability up to 150 PSI, the 157S-P utilizes snap-acting SPDT switches to maintain reliable pump control and alarm activation. The side ports with alternate tapping options facilitate versatile installation across various boiler configurations, making it a standard for contractors requiring dependable Xylem boiler control solutions.
Key Technical Benefits:- Dual Functionality: Manages both pump operation and low water cut-off (LWCO) safety functions within a single housing, reducing piping complexity.
- Enhanced Durability: The Monel bellows construction provides enhanced chemical resistance and longevity in demanding steam environments.
- Precision Switching: Equipped with snap-acting switches that eliminate "creep" and minimize arcing, ensuring a clean electrical break for pump and alarm circuits.
- Universal Application: Engineered to work with boilers of any steaming capacity, providing a versatile solution for diverse industrial steam boiler systems.
- Direct Retrofit: Seamlessly replaces existing McDonnell & Miller 157S units without requiring extensive manifold modifications.
What is the difference between the 157S and the 157S-P?
The 157S-P is the current production model and serves as the direct replacement for the 157S. It maintains identical mounting dimensions and functional specifications while incorporating the 175802 part number.
Can weight and pressure ratings handle high-pressure process steam?
Yes, the 157S-P is rated for a maximum pressure of 150 PSI. It is built with a heavy-duty float mechanism and Monel bellows specifically for high-temperature and high-pressure steam service.
How does the manual reset function impact system safety?
In a low-water event, the manual reset requires a technician to physically inspect the boiler and reset the controller before the burner can be fired again, preventing automatic cycling under unsafe conditions.
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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The McDonnell & Miller 157S-P Controller (Part #175802) is a precision-engineered combination low water cut-off and pump controller designed for commercial and industrial steam boilers of any steaming capacity. As the direct replacement for the legacy McDonnell & Miller 157S, this unit integrates a manual reset mechanism to ensure rigorous safety protocols in the event of a low-water condition. Featuring a robust Monel bellows for superior corrosion resistance and high-pressure durability up to 150 PSI, the 157S-P utilizes snap-acting SPDT switches to maintain reliable pump control and alarm activation. The side ports with alternate tapping options facilitate versatile installation across various boiler configurations, making it a standard for contractors requiring dependable Xylem boiler control solutions.
Key Technical Benefits:- Dual Functionality: Manages both pump operation and low water cut-off (LWCO) safety functions within a single housing, reducing piping complexity.
- Enhanced Durability: The Monel bellows construction provides enhanced chemical resistance and longevity in demanding steam environments.
- Precision Switching: Equipped with snap-acting switches that eliminate "creep" and minimize arcing, ensuring a clean electrical break for pump and alarm circuits.
- Universal Application: Engineered to work with boilers of any steaming capacity, providing a versatile solution for diverse industrial steam boiler systems.
- Direct Retrofit: Seamlessly replaces existing McDonnell & Miller 157S units without requiring extensive manifold modifications.
What is the difference between the 157S and the 157S-P?
The 157S-P is the current production model and serves as the direct replacement for the 157S. It maintains identical mounting dimensions and functional specifications while incorporating the 175802 part number.
Can weight and pressure ratings handle high-pressure process steam?
Yes, the 157S-P is rated for a maximum pressure of 150 PSI. It is built with a heavy-duty float mechanism and Monel bellows specifically for high-temperature and high-pressure steam service.
How does the manual reset function impact system safety?
In a low-water event, the manual reset requires a technician to physically inspect the boiler and reset the controller before the burner can be fired again, preventing automatic cycling under unsafe conditions.
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.
