
Mepco (Dunham Bush) ML6358 Trap
The Mepco ML6358 Trap (Dunham Bush) is a high-capacity 1-1/2" Float and Thermostatic Trap engineered for heavy condensate loads in low pressure steam heating systems. Designed for installation at terminal ends of steam mains and large heat exchangers, the ML6358 utilizes a robust stainless steel valve head and seat to resist wire drawing and erosion. The dual-mechanism design features a stainless steel float for continuous condensate drainage and a bellows-type thermostatic air vent for efficient non-condensable gas removal. This configuration prevents air binding and ensures rapid system start-up. The 1.5-inch NPT connection delivers the flow capacity required for industrial-grade HVAC applications without the risk of water hammer. Built with a heavy-duty cast iron body, this trap is a drop-in replacement for legacy Dunham Bush F&T traps, providing reliable performance in gravity or vacuum return lines where immediate drainage is critical.
Key Benefits for Technicians
- High Condensate Capacity: 1-1/2 inch NPT ports handle significant loads for steam mains and unit heaters.
- Robust Materials: Stainless steel internal components reduce maintenance intervals in harsh HVACR environments.
- Efficient Air Removal: Integrated thermostatic bellows ensures air is purged instantly, preventing cold spots.
- Direct Compatibility: Precision-fit for Mepco ML6358 specifications used in Dunham Bush infrastructure.
- Installation Versatility: Suitable for both modulate and constant pressure variations in large-scale piping.
Commonly Asked Questions
How do I determine if this trap is suitable for vacuum return systems?
The ML6358 is specifically designed to function effectively in both gravity and vacuum steam systems, provided the differential pressure does not exceed the rated maximum for the internal orifice size.
Can the thermostatic air vent be serviced without removing the trap from the line?
Yes, the internal assembly is accessible through the cover plate, allowing for maintenance of the float mechanism and air vent while the body remains piped in.
What causes a float and thermostatic trap to fail in the open position?
Open-side failures typically result from debris lodged in the valve seat or a ruptured float; installing a strainer upstream is recommended to protect the internal steam trap components.
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.
Mepco (Dunham Bush) ML6358 Trap
The Mepco ML6358 Trap (Dunham Bush) is a high-capacity 1-1/2" Float and Thermostatic Trap engineered for heavy condensate loads in low pressure steam heating systems. Designed for installation at terminal ends of steam mains and large heat exchangers, the ML6358 utilizes a robust stainless steel valve head and seat to resist wire drawing and erosion. The dual-mechanism design features a stainless steel float for continuous condensate drainage and a bellows-type thermostatic air vent for efficient non-condensable gas removal. This configuration prevents air binding and ensures rapid system start-up. The 1.5-inch NPT connection delivers the flow capacity required for industrial-grade HVAC applications without the risk of water hammer. Built with a heavy-duty cast iron body, this trap is a drop-in replacement for legacy Dunham Bush F&T traps, providing reliable performance in gravity or vacuum return lines where immediate drainage is critical.
Key Benefits for Technicians
- High Condensate Capacity: 1-1/2 inch NPT ports handle significant loads for steam mains and unit heaters.
- Robust Materials: Stainless steel internal components reduce maintenance intervals in harsh HVACR environments.
- Efficient Air Removal: Integrated thermostatic bellows ensures air is purged instantly, preventing cold spots.
- Direct Compatibility: Precision-fit for Mepco ML6358 specifications used in Dunham Bush infrastructure.
- Installation Versatility: Suitable for both modulate and constant pressure variations in large-scale piping.
Commonly Asked Questions
How do I determine if this trap is suitable for vacuum return systems?
The ML6358 is specifically designed to function effectively in both gravity and vacuum steam systems, provided the differential pressure does not exceed the rated maximum for the internal orifice size.
Can the thermostatic air vent be serviced without removing the trap from the line?
Yes, the internal assembly is accessible through the cover plate, allowing for maintenance of the float mechanism and air vent while the body remains piped in.
What causes a float and thermostatic trap to fail in the open position?
Open-side failures typically result from debris lodged in the valve seat or a ruptured float; installing a strainer upstream is recommended to protect the internal steam trap components.
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 Mepco ML6358 Trap (Dunham Bush) is a high-capacity 1-1/2" Float and Thermostatic Trap engineered for heavy condensate loads in low pressure steam heating systems. Designed for installation at terminal ends of steam mains and large heat exchangers, the ML6358 utilizes a robust stainless steel valve head and seat to resist wire drawing and erosion. The dual-mechanism design features a stainless steel float for continuous condensate drainage and a bellows-type thermostatic air vent for efficient non-condensable gas removal. This configuration prevents air binding and ensures rapid system start-up. The 1.5-inch NPT connection delivers the flow capacity required for industrial-grade HVAC applications without the risk of water hammer. Built with a heavy-duty cast iron body, this trap is a drop-in replacement for legacy Dunham Bush F&T traps, providing reliable performance in gravity or vacuum return lines where immediate drainage is critical.
Key Benefits for Technicians
- High Condensate Capacity: 1-1/2 inch NPT ports handle significant loads for steam mains and unit heaters.
- Robust Materials: Stainless steel internal components reduce maintenance intervals in harsh HVACR environments.
- Efficient Air Removal: Integrated thermostatic bellows ensures air is purged instantly, preventing cold spots.
- Direct Compatibility: Precision-fit for Mepco ML6358 specifications used in Dunham Bush infrastructure.
- Installation Versatility: Suitable for both modulate and constant pressure variations in large-scale piping.
Commonly Asked Questions
How do I determine if this trap is suitable for vacuum return systems?
The ML6358 is specifically designed to function effectively in both gravity and vacuum steam systems, provided the differential pressure does not exceed the rated maximum for the internal orifice size.
Can the thermostatic air vent be serviced without removing the trap from the line?
Yes, the internal assembly is accessible through the cover plate, allowing for maintenance of the float mechanism and air vent while the body remains piped in.
What causes a float and thermostatic trap to fail in the open position?
Open-side failures typically result from debris lodged in the valve seat or a ruptured float; installing a strainer upstream is recommended to protect the internal steam trap components.
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.











