FAQ Panels (part 2)

A canned motor pump is a type of centrifugal pump where the pump and motor are integrated into a single, sealed unit. The pump and motor combination are leak-free, making them suitable for pumping hazardous liquids as they will not leak into the atmosphere.

Our canned motor pumps are ideal for applications that require the highest reliability, safety, and performance, as our pumps are leak-free and low maintenance. They are used in a variety of industries—such as petrochemical, chemical refinement and processing, hydrogen and clean energy, refrigeration, renewables, and nuclear—to move large amounts of fluid.

Canned motor pumps are preferred over mechanically sealed pumps and magnetic drive pumps for a number of reasons. Lack of seals eliminates failures and safety issues that seals can cause. They are are also low maintenance and reduce noise levels. They also weigh less than other pumps, eliminating the need for a foundation, and eliminate problematic emissions inspections and reporting associated with other pump types.

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. 

Canned motor pumps are typically made from type 304 stainless steel for wetted components, with the stator and rotor cans constructed from Hastelloy C276 for its high corrosion resistance and efficiency. Gaskets are usually made of PTFE or spiral-wound stainless steel, depending on temperature and pressure conditions. Bearings are typically made from carbon graphite or silicon carbide, chosen based on application requirements.

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.

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.

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.

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.

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.

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.

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.  

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. 

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.

A Varley Gear Pump is a type of positive displacement pump designed with double helical gears to create a positive displacement mechanism, ensuring consistent fluid flow, low maintenance, and a long service life.

Known for their reliability and high suction lift, Varley Gear Pumps are used in applications like fuel oil transfer, lubrication systems, and industrial processes, particularly in the oil and gas, power generation, and chemical industries. 

Our pumps have a design lifetime of 25+ years and have a lower total cost of ownership compared to our competitors.

Motorised gear pumps can be supplied with motors from any of the main motor manufacturers to meet specific customer requirements or project specifications.

Varley Gear Pumps can be customized to meet specific needs. Our engineering services are available to help design a pump that meets specific international standards, ATEX certification, pressure range, materials, seal arrangement, and more.

A high-temperature pump is a specialized pump designed to handle fluids at extremely high temperatures, typically 750C+ (1380F). These pumps are used in industries where hot liquids, molten materials, or thermal oils need to be moved efficiently while withstanding extreme heat conditions.

Hayward Tyler’s high-temperature pumps are specifically designed for use in the advanced nuclear energy sector. Common applications include molten salt or liquid sodium loops, concentrated solar power- primary coolant salt pumps, and high temperature metal.

Advanced nuclear energy refers to the next generation of nuclear reactor designs that aim to improve upon traditional nuclear power systems in terms of safety, efficiency, sustainability, and waste reduction. These technologies replace conventional light water reactors (LWRs) with molten salt reactors (MSRs), enabling higher efficiency and safety. These technologies also reduce nuclear waste.

Our pumps are often made from stainless steel, Hastelloy, Inconel, or other high nickel, heat-resistant alloys to withstand extreme conditions.

Yes, our pumps are custom engineered to consider the unique characteristics of each application. This includes thermal stress, thermal growth, and pump sealing options. We understand these challenges and have expert design solutions to solve these complex problems.

The systems can identify a wide range of faults including:
Mechanical unbalance/misalignment
– Bearing problems
– Foundation looseness
– Transmission looseness or rubbing
– Motor rotor bar breaks
– Motor stator problems
– Electrical odd and even harmonic abnormalities
– Any other spectrum peak beyond normal expected values

Yes, the system provides simple traffic light (Green-Amber-Red) assessments of equipment condition for the present, one month in the future, and three months in the future.

The systems measure:
– Active power, reactive power, and power factor
– Voltage balance
– Current balance
– Voltage THD (Total Harmonic Distortion)
– Current THD
– Additional machine-specific information if available

The systems provide accurate, up-to-the-minute knowledge of equipment health and remaining useful life, allowing for predictive maintenance that maximizes availability. By detecting developing problems before they become critical, the systems help prevent unexpected breakdowns and avoid unnecessary maintenance work.

Yes, both systems measure energy consumption and identify energy-wasting parameters, allowing users to take cost-justified actions to reduce energy consumption.

No, all connections and testing are done in the switch room and are taken from the low voltage and low current signals feeding the protection system. There is no need to disconnect or disturb any existing connections.

The S200 system uses a Model-Based Voltage and Current (MBVI) technique to monitor equipment. It measures the voltage and current drawn by the motor to identify failure modes and assess equipment condition. It continuously provides real-time assessment of mechanical, electrical, and operational health.

The S200 is designed to be mounted inside the motor starter cabinet or in an adjacent electrical compartment or cabinet.

The S200 is a compact unit approximately 100mm x 80mm x 75mm in size.

The S200 has its own local processing unit and local database, which communicates via Ethernet to a central database, allowing users to view equipment status remotely.

The S200 system uses a Model-Based Voltage and Current (MBVI) technique to monitor equipment. It measures the voltage and current drawn by the motor to identify failure modes and assess equipment condition. It continuously provides real-time assessment of mechanical, electrical, and operational health.

The S200 is designed to be mounted inside the motor starter cabinet or in an adjacent electrical compartment or cabinet.

The S200 is a compact unit approximately 100mm x 80mm x 75mm in size.

The S200 has its own local processing unit and local database, which communicates via Ethernet to a central database, allowing users to view equipment status remotely.

The B20 software system pulls data from all S200 units and provides:
– An overview of the condition of one or all assets
– Alerts for detected faults
– Trend graphs showing deterioration progress
– Overview of equipment condition and electricity supply
– Forecasts of overall condition for one and three months into the future
– Information about identified faults, including nature, impact, and recommended action

The systems can identify a wide range of faults including:
– Mechanical unbalance/misalignment
– Bearing problems
– Foundation looseness
– Transmission looseness or rubbing
– Motor rotor bar breaks
– Motor stator problems
– Electrical odd and even harmonic abnormalities
– Any other spectrum peak beyond normal expected values

Yes, the system provides simple traffic light (Green-Amber-Red) assessments of equipment condition for the present, one month in the future, and three months in the future.

The systems measure:
– Active power, reactive power, and power factor
– Voltage balance
– Current balance
– Voltage THD (Total Harmonic Distortion)
– Current THD
– Additional machine-specific information if available

The systems provide accurate, up-to-the-minute knowledge of equipment health and remaining useful life, allowing for predictive maintenance that maximizes availability. By detecting developing problems before they become critical, the systems help prevent unexpected breakdowns and avoid unnecessary maintenance work.

Yes, both systems measure energy consumption and identify energy-wasting parameters, allowing users to take cost-justified actions to reduce energy consumption.

No, all connections and testing are done in the switch room and are taken from the low voltage and low current signals feeding the protection system. There is no need to disconnect or disturb any existing connections.

The P100 Series is portable and provides snapshot assessments of equipment health, while the S200 provides continuous 24/7 monitoring. The P100 is ideally suited for remote or difficult-to-access equipment and creates automatic written and graphic reports after a brief test.

The only connections required are current clamps to measure the current and dolphin connectors to measure the voltage.

Testing with the P100 Series takes only a few minutes, after which the device creates an automatic written and graphic report that can be edited and emailed.

The systems can identify a wide range of faults including:
– Mechanical unbalance/misalignment
– Bearing problems
– Foundation looseness
– Transmission looseness or rubbing
– Motor rotor bar breaks
– Motor stator problems
– Electrical odd and even harmonic abnormalities
– Any other spectrum peak beyond normal expected values

Yes, the system provides simple traffic light (Green-Amber-Red) assessments of equipment condition for the present, one month in the future, and three months in the future.

The systems measure:
– Active power, reactive power, and power factor
– Voltage balance
– Current balance
– Voltage THD (Total Harmonic Distortion)
– Current THD
– Additional machine-specific information if available

The systems provide accurate, up-to-the-minute knowledge of equipment health and remaining useful life, allowing for predictive maintenance that maximizes availability. By detecting developing problems before they become critical, the systems help prevent unexpected breakdowns and avoid unnecessary maintenance work.

Yes, both systems measure energy consumption and identify energy-wasting parameters, allowing users to take cost-justified actions to reduce energy consumption.

No, all connections and testing are done in the switch room and are taken from the low voltage and low current signals feeding the protection system. There is no need to disconnect or disturb any existing connections.

These pumps are primarily used for circulating water, condenser cooling circulation, and cooling water make-up in nuclear power plants.

The MT/MN/BN series pumps can handle flow rates up to 178,000 USgpm (US gallons per minute).

These pumps can achieve heads up to 152 ft.

What are the maximum discharge sizes available for Hayward Tyler’s Axial & Mixed Flow Pumps?

The MT/MN/BN pumps can operate at speeds up to 1180 rpm.

The series offers multiple hydraulic designs that provide variation in the capacity curve characteristics, ranging from steep to flat curves based on system needs.

Unlike the VS series (vertical turbines), which are designed for medium head and medium capacity applications, the MT/MN/BN series axial and mixed flow pumps are specifically designed for large flow capacities at relatively low heads.