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How to Read MTH Pumps Model Numbers

Standard Product Model Numbers
 

Regenerative Turbine Pumps

Typically MTH's Regenerative Turbines all use the same standard format for our modeling number system.

The first character indicates the pump family. The second character indicates the approximate impeller size. The third character indicates the number of stages the pump has.
   
P31 Series

Standard Configuration

Optional Configurations

Special Features

Close Coupled - Top Suction • Top Discharge

  • Wet end rotation to the motor

  • Adjustable impeller clearances

  • Optional built-in relief valve
Sample Model Number
P31C-SS

Model Breakdown

P

3

1

C

-SS

Breakdown Definitions

Pump Series

Impeller size
(approx.)

Number of Impellers
(Stages)

Impeller/water channel indicator

Material

Breakdown Options

Regenerative Turbine -
Adjustable Casing

3-inch

1

C

Stainless Steel - SS

 

 
T31 Series

Standard Configuration

Optional Configurations

Special Features

Close Coupled - End Suction • Top Discharge

  • Wet end rotation to the motor

  • Pedestal Mounting also available

  • Available in Sealless Canned configuration
Sample Model Number
T31A-AB

Model Breakdown

T

3

1

A

-AB

Breakdown Definitions

Pump Series

Impeller size
(approx.)

Number of Impellers
(Stages)

Impeller/water channel indicator

Material

Breakdown Options

Close Coupled Regenerative Turbine Pumps

3-inch

1

A through H

All Bronze - AB
Stainless Steel - SS

 

 
T41 Series

Standard Configuration

Optional Configurations

Special Features

Close Coupled - End Suction • Top Discharge

  • Wet end rotation to the motor

  • Pedestal or Flange Mountings also available

  • Available in Sealless Canned configuration

  • Seal Cooling Jacket Available
Sample Model Number
T41C-BF

Model Breakdown

T

4

1

C

-BF

Breakdown Definitions

Pump Series

Impeller size
(approx.)

Number of Impellers
(Stages)

Impeller/water channel indicator

Material

Breakdown Options

Close Coupled Regenerative Turbine Pumps

4-inch

1

B through P

All Bronze - AB
Bronze Fitted - BF
All Iron - AI
Stainless Steel - SS
Stainless Fitted - SF

 

 
E41 Series

Standard Configuration

Optional Configurations

Special Features

Close Coupled - End Suction • Top Discharge

  • Wet end rotation to the motor

  • Flange Mountings also available

  • Up to 3 HP motor
Sample Model Number
E41G-SS

Model Breakdown

E

4

1

G

-SS

Breakdown Definitions

Pump Series

Impeller size
(approx.)

Number of Impellers
(Stages)

Impeller/water channel indicator

Material

Breakdown Options

Close Coupled Regenerative Turbine Pumps w/ D3 Motors

4-inch

1

B through P

All Bronze - AB
Bronze Fitted - BF
All Iron - AI
Stainless Steel - SS
Stainless Fitted - SF

 

 
T51 Series

Standard Configuration

Optional Configurations

Special Features

Close Coupled - End Suction • Top Discharge

  • Wet end rotation to the motor

  • Pedestal or Flange Mountings also available

  • Available in Sealless Canned configuration
Sample Model Number
T51L-AI

Model Breakdown

T

5

1

L

-AI

Breakdown Definitions

Pump Series

Impeller size
(approx.)

Number of Impellers
(Stages)

Impeller/water channel indicator

Material

Breakdown Options

Close Coupled Regenerative Turbine Pumps

5-inch

1

B through R

All Bronze - AB
Bronze Fitted - BF
All Iron - AI
Stainless Steel - SS
Stainless Fitted - SF

 

 
E51 Series

Standard Configuration

Optional Configurations

Special Features

Close Coupled - End Suction • Top Discharge

  • Wet end rotation to the motor

  • Flange Mounting also available

  • Up to 3 HP motor
Sample Model Number
E51J-SS

Model Breakdown

E

5

1

J

-SS

Breakdown Definitions

Pump Series

Impeller size
(approx.)

Number of Impellers
(Stages)

Impeller/water channel indicator

Material

Breakdown Options

Close Coupled Regenerative Turbine Pumps w/ D3 Motors

5-inch

1

B through R

All Bronze - AB
Bronze Fitted - BF
All Iron - AI
Stainless Steel - SS
Stainless Fitted - SF

 

 
M50 Series

Standard Configuration

Optional Configurations

Special Features

In-line Vertical Close Coupled - Top Suction • Top Discharge

  • Horizontal Close Coupled and Pedestal mounting also available

  • Available in Reverse Circulation Sealless Canned configuration
Sample Model Number
M53R-BF

Model Breakdown

M

5

3

R

-BF

Breakdown Definitions

Pump Series

Impeller size
(approx.)

Number of Impellers
(Stages)

Impeller/water channel indicator

Material

Breakdown Options

Multi-stage
Regenerative Turbine

5-inch

1
2
3
4
5

B through R

All Bronze - AB
Bronze Fitted - BF
All Iron - AI
Stainless Steel - SS
Stainless Fitted - SF

 

 
L50 Series

Standard Configuration

Optional Configurations

Special Features

In-line Vertical Close Coupled - Top Suction • Top Discharge

  • Horizontal Close Coupled and Pedestal mounting also available

  • Available in Reverse Circulation Sealless Canned configuration
Sample Model Number
L54G-SF

Model Breakdown

L

5

4

G

-SF

Breakdown Definitions

Pump Series

Impeller size
(approx.)

Number of Impellers
(Stages)

Impeller/water channel indicator

Material

Breakdown Options

Low NPSH
Inducer Style
Multi-stage
Regenerative Turbine

5-inch

1
2
3
4
5

B through R

All Bronze - AB
Bronze Fitted - BF
All Iron - AI
Stainless Steel - SS
Stainless Fitted - SF

 

 
100• 200 Series

Standard Configuration

Optional Configurations

Special Features

Horizontal Flexible Coupled

  • Top Suction • Top Discharge (140 • 180 • 240 • 280)

  • Top Suction • End Discharge (150 • 160 • 170 • 250 • 260 • 270)

  • Reverse Circulation Sealless Canned configuration coming 2007
Sample Model Number
143H-BR

Model Breakdown

1

4

3

H

-BR

Breakdown Definitions

Pump Series

Impeller size
(approx.)

Number of Impellers
(Stages)

Impeller/water channel indicator

Material

Breakdown Options

1 - Flexible Coupled
Multi-stage
Regenerative Turbine

2 - Low NPSH
Inducer Style
Flexible Coupled
Multi-stage
Regenerative Turbine

4 - 4inch (approx.)
5- 5inch (approx.)
6- 6inch (approx.)
7- 7inch (approx.)
8 - 4inch (Double Thickness)

1
2
3
4

D through R

All Bronze - AB
Bronze Fitted - BF
Bronze Ring - BR
All Iron - AI
Stainless Steel - SS
 

Centrifugal Pumps
   
C Series

Standard Configuration

Optional Configurations

Special Features

Horizontal Close Coupled - End Suction • Top Discharge

  • Wet end rotation to the motor

  • Flange Mountings also available

  • Investment Cast Stainless Steel
Sample Model Number
C41DE

Model Breakdown

C

4

1

DE

Breakdown Definitions

Pump Series

Impeller size
(approx.)

Number of Impellers
(Stages)

XX - (Discharge X Inlet)

Breakdown Options

Centrifugal Pumps

4 - 4inch (approx.)
5- 5inch (approx.)
6- 6inch (approx.)

1

AB - 1/2" X 3/4"
BC - 3/4" X 1"
CD - 1" X 1 1/4"
DE - 1 1/4" X 1 1/2"
EF - 1 1/2" X 2"
   
D Series

Standard Configuration

Optional Configurations

Special Features

Horizontal Close Coupled - End Suction • Top Discharge

  • Wet end rotation to the motor

  • 500°F Seal Cooling Jacket

  • Self-Priming Option

  • Vertical Configuration

  • Available in Cast Iron or Bronze
Sample Model Number
D71DE

Model Breakdown

D

7

1

DE

Breakdown Definitions

Pump Series

Impeller size
(approx.)

Number of Impellers
(Stages)

XX - (Discharge X Inlet)

Breakdown Options

Large Capacity Centrifugal Pumps

5- 5inch (approx.)
6- 6inch (approx.)
7- 7inch (approx.)
9- 9inch (approx.)

1

CD - 1" X 1 1/4"
DE - 1 1/4" X 1 1/2"
EF - 1 1/2" X 2"
EE - 1 1/2" X 1 1/2" (Self-priming)
DM - 1 1/4" X Flange

Please click here to learn how to identify a pump by serial number.

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