Defense 
Hydrogen 
Renewable 
Oil & Gas 
Nuclear 
Chemical 
Power Generation 
Design Features of Wet Stator Motor Pumps (BCP / BWCP)
Vertical pump with an integrated wet wound motor. The pump and motor are designed for the same internal pressure, so there is no need for a dynamic mechanical seal. Ideal for high inlet pressure and temperature applications.
- No mechanical seal means no leakage
- Single or double pump discharge
- Fluid-filled motor
- Single external cooling water supply
- Internal filter
- Product lubricated radial and axial bearings (tilt pad style)
- Supported from pump case, so no foundation bolts
- Thermal neck keeps motor at a low temperature
- Option: removable stator cartridge for ease of maintenance
Codes & Specifications
Operating Data
| Motor | US | SI |
|---|---|---|
| Power | 400-3350HP | 300-2,500kW |
| Voltage | 380-11kV | 380-11kV |
| Poles | 2, 4 | 2, 4 |
| VSD Compatible | Yes | Yes |
| Design Pressure | 0-5800+ psig | 0-400 bar |
| Design Temperature | 32 to 750°F | 0 to 400°C |
| Pump | US | SI |
|---|---|---|
| Flow | Up to 44,000 USgpm | 10,000 m3/hr |
| Head | Up to 1,800 ft | 550 m |
Codes and Compliances
- ASME Section VIII and III including stamp (N)
- Hydraulic Institute
- Pressure Equipment Directive (PED)
- 10CFR21 and 10CFR50 (Nuclear)
- RCC-M and RCC-E
- Other international codes as required.
Hydraulic Range
Applications
Hayward Tyler Wet Stator Motor Pumps are ideal for the following applications:
Power
- Drum Boiler Circulation
- Subcritical Boiler Circulation
- Circulated Fluidized Bed Circulation
- Super-Critical Once Through Boiler Circulation
- Ultra-Super Critical Once Through Boiler Circulation
- Ultra-Super Critical Secondary Reheat Boiler Circulation
- Ultra-Ultra Super Critical Once Through Boiler Circulation
- Gas Temperature Control Economizer Recirculation
- Selective Catalytic Reduction Economizer Recirculation
- Selective Catalytic Reduction – Start-up Recirculation
Solar
- Solar Steam Generating System Forced Circulation
- Solar Start-up Recirculation
- Central Tower Steam Generation System (CT SGS) Internal Circulation
- Central Tower Steam Generation System (CT SGS) External Circulation
Chemical
- Syngas Cooling Circulation
- Syngas Scrubber Circulation
- Boiler Circulation
- Boiler Feedwater Circulation
- Nuclear Reactor Water Clean-Up (RWCU)
Nuclear
- Reactor Water Clean-Up (RWCU)
Documents
Download our brochure to read more about all Hayward Tyler Wet Stator Motor Pumps:
Download Case Studies related to Hayward Tyler Boiler Water Circulating Pumps:
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Learn more about our sealless BCPs – your solution for high-pressure, high-temperature applications.
Sectional Arrangement
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Service & Support
We take great pride in supporting our clients across the globe with timely service. We cover all aspects of support that might be needed during the lifecycle of your Hayward Tyler pump and/or motor.
We provide:
- 24/7/365 Technical Support
- Engineering
- Spare Parts
- Repairs
- Training
Wet Stator Motor Pumps (BCPs) FAQs
How is the seal eliminated in these pumps?
Due to the laws of physics, higher-pressure fluids want to move to lower-pressure areas. Because traditional pumps must couple to a driver (motor or turbine), the shaft needs to exit the pump pressure boundary (pump case). This means the high-pressure fluid created by the rotating pump wants to leak into the atmosphere along the shaft penetration. This is stopped in traditional pumps by using gland packing or a mechanical seal. CMPs and BCPs use a different approach by using a common shaft for the pump and motor and containing it all in a pressure boundary. This eliminates the pressure differential across the rotating seal and the driving force for the fluid to leak.
Are these pumps environmentally friendly?
Our CMPs and BCPs are inherently safe and environmentally friendly. Because they are sealless, the danger of a fluid leak is eliminated, preventing contamination to the environment.
How long do these pumps last?
Our CMPs and BCPs can last up to 30 years, but typically last 10 to 15 years. The lifespan is dependent upon fluid properties and operating conditions.
What is a Wet Stator Motor Pump?
Also known as a Boiler Water Circulating Pump (BCP), a Wet Stator Motor Pump is a vertical pump with an integrated fluid-filled motor. It is used in industrial applications to circulate high-pressure and high-temperature fluids.
What is a Wet Stator Motor Pump (BCP) used for?
Wet Stator Motor Pumps are most commonly used in applications that require boiler water circulation within power plants. They are also used in nuclear reactor coolant loops and chemical processing applications, as they are ideal for preventing hazardous liquids from escaping into the environment.
What type of aftermarket service(s) do you offer for Wet Stator Motor Pumps (BCPs)?
We offer three key aftermarket services for Wet Stator Motor Pumps: 1) Stator rewind with XLPE cable material, including options to increase motor power, add VFD compatibility, and improve efficiency. 2) Stator/Rotor Restack to restore or enhance electrical performance through lamination rebuilding, and 3) Bearing upgrades featuring improved materials and optional double thrust design retrofit (up to 10x better reverse direction performance). Our multiple facilities around the globe enable a local repair/upgrade solution that’s convenient.
What is a wet-wound motor?
A wet-wound motor is an electric motor design where the stator windings are directly exposed to and cooled by the pumped fluid, eliminating the need for a protective can or sleeve between the stator and rotor. This design improves heat transfer and efficiency but requires specialized insulation materials to prevent electrical shorts.
