This 400 GPM boiler feedwater pump manufactured by Sulzer is a high-pressure, multi-stage centrifugal pump engineered for continuous-duty steam generation systems. Model MSD 3x6x9E delivers 400 gallons per minute at 1,800 feet of head (approximately 780 PSI) at 3,560 RPM, making it well suited for medium to large industrial boilers.
This unit is in like-new condition and was rebuilt in July 2021 as a storeroom spare, providing a reliable and immediately deployable solution for facilities operating boilers rated between 150,000 and 200,000 lbs/hr of steam capacity.
For buyers searching for a used Sulzer boiler feedwater pump for sale, high-pressure multi-stage boiler pump, or surplus 400 GPM BFW pump, this unit offers substantial capital savings and reduced lead time compared to new OEM procurement.
Industrial Performance Specifications
- Manufacturer: Sulzer
- Model: MSD 3x6x9E
- Pump Type: Multi-Stage Centrifugal Boiler Feedwater Pump
- Flow Rate: 400 GPM
- Total Dynamic Head: 1,800 Ft. (Approx. 780 PSI)
- Speed: 3,560 RPM
- Condition: Like New – Rebuilt 07/2021
- Boiler Compatibility: 150,000 – 200,000 LBS/HR Steam Systems
What Is a Boiler Feedwater Pump?
A boiler feedwater pump (BFW pump) is a high-pressure centrifugal pump designed to deliver treated water at a dynamic pressure sufficient to maintain a set steam pressure. This configuration supports high-pressure feedwater delivery required for industrial boiler watertube and firetube boiler systems operating in continuous production environments.
Its primary functions include:
- Maintaining consistent boiler water levels
- Overcoming high steam drum pressure
- Protecting boiler tubes from overheating
Multi-stage centrifugal pumps like the Sulzer MSD series are commonly used in high-capacity steam plants due to their ability to generate significant discharge pressure while maintaining steady flow rates.
What Does 1,800 Feet of Head Mean?
Total dynamic head (TDH) of 1,800 feet represents the pump’s ability to generate approximately 780 PSI of discharge pressure. This level of pressure is typically required in:
- High-pressure industrial boilers
- Power generation facilities
- Refinery steam systems
- Petrochemical processing plants
- Pulp and paper mills
High head capability ensures the pump can overcome boiler drum pressure while maintaining proper feedwater flow under load variations.
5-Stage Multi-Stage Pump Design Advantages
The five-stage configuration allows pressure to build incrementally across multiple impellers, offering:
- Higher discharge pressure capability
- Improved hydraulic efficiency
- Reduced stress on individual impellers
- Enhanced reliability in continuous-duty applications
- Stable performance under fluctuating steam demand
This design is standard in industrial boiler rooms supporting large steam production facilities.
Typical Industrial Applications
This 400 GPM Sulzer boiler feedwater pump is suitable for:
- Utility and captive power plants
- Oil & gas processing facilities
- Chemical manufacturing operations
- Industrial steam generation systems
- Pulp and paper production
- Large manufacturing plants
Industrial buyers across North America, Latin America, the Middle East, and Asia frequently source surplus high-pressure boiler feed pumps for capacity upgrades, redundancy planning, and emergency replacement.
Benefits of Purchasing a Used Sulzer Boiler Feedwater Pump
Acquiring a surplus multi-stage BFW pump can provide:
- Lower capital investment compared to new OEM pumps
- Immediate availability for outage or emergency replacement
- Reduced project lead times
- Proven industrial design and construction
- Cost-effective expansion of boiler system capacity
For facilities requiring immediate high-pressure feedwater capability, this rebuilt Sulzer MSD pump offers a practical and economically efficient solution.
Inspection & Availability
Unit is available for inspection by appointment.
