Section T-2M
* Horsepower data is valid for 1.0 specific gravity fluids only
• Capacities to 30 LPM
• Heads to 75 Meters
• Low NPSH Requirements
• Horizontal Close Coupled
• Flex Coupled
MTH PUMPS
T31 Series - 50Hz Metric Edition
T31 SERIES
Composite Curves
T31
SERI
ES P
UMPS
© Copyright 2008 MTH Tool Company, Inc. Dated March 2008
T31 SERIES (50 Hz 1.0 Service Factor Motor Horsepower Selections*) 2880 RPM
0 100
50
100
150
200
250
300
9
A B C D E F G H
ALL MOTOR ENCLOSURES
87654321
Hea
d in
Fee
t
Hea
d in
Met
ers
0
10
20
30
40
50
60
70
80
90
U.S. Gallons per Minute
Liters per Minute0 5 10 15 20 25 30 35
1/3
1/2
1/31/3
1/3
1/3
1/2
1/2
1/2
1/3
1/3
T31 SERIES
T31 SERIES PUMPS
© Copyright 2008 MTH Tool Company, Inc. Dated March 2008
Page T-3M
Performance Curves
Indicates altered performance at NPSH Available* Horsepower data is valid for 1.0 specific gravity fluids only
0.0 0.5 1.0 1.5 2.0
T31A 2880 RPM
Head-Capacity
BHP*
% Efficiency
NPSH 4’, 7’
Hea
d in
Fee
t
0
100
200
300
400
500
Hea
d in
Met
ers
0
20
40
60
80
100
120
140
U.S. Gallons per Minute
Liters per Minute0 1 2 3 4 5 6 7
0
.125
.25
BH
P*
.375
.5
0
0.09
0.19
0%
10%
20%
30%
40%
kW*
EFF
0.28
0.37
2880 RPM
0.0 0.5 1.0 1.5 2.0 2.5
T31B
Head-Capacity
BHP*
% Efficiency
NPSH 4’
Hea
d in
Fee
t
0
100
200
300
400
500
Hea
d in
Met
ers
0
20
40
60
80
100
120
140
0
0.25
0.5
BH
P*
0.75
1.0
0
0.18
0.37
0%
10%
20%
30%
40%
kW*
EFF
0.56
0.75
U.S. Gallons per Minute
Liters per Minute0 1 2 3 4 5 6 7 8 9
T31 SERIES
T31
SERI
ES P
UMPS
© Copyright 2008 MTH Tool Company, Inc. Dated March 2008
Page T-4M
Performance Curves
2880 RPM
0.0 0.5 1.0 1.5 2.0 2.5 3.0
T31C
Head-Capacity
BHP*
% Efficiency
NPSH 4’
Hea
d in
Fee
t
0
100
200
300
400
500
Hea
d in
Met
ers
0
20
40
60
80
100
120
140
0
0.25
0.5
BH
P*
0.75
1.0
0
0.18
0.37
0%
10%
20%
30%
40%
kW*
EFF
0.56
0.75
U.S. Gallons per Minute
Liters per Minute0 1 2 3 4 5 6 7 8 9 10 12
2880 RPM
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
T31D
Head-Capacity
BHP*
% Efficiency
NPSH 4’
Hea
d in
Fee
t
0
100
200
300
400
500
Hea
d in
Met
ers
0
20
40
60
80
100
120
140
0
0.25
0.5
BH
P*
0.75
1.0
0
0.18
0.37
0%
10%
20%
30%
40%
kW*
EFF
0.56
0.75
Liters per Minute0 2 10 12 144 6 8
U.S. Gallons per Minute
Indicates altered performance at NPSH Available* Horsepower data is valid for 1.0 specific gravity fluids only
T31 SERIES
T31 SERIES PUMPS
© Copyright 2008 MTH Tool Company, Inc. Dated March 2008
Page T-5M
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
T31E 2880 RPM
Head-Capacity
BHP*
% Efficiency
NPSH 4’ 7’
Hea
d in
Fee
t
0
100
200
300
400
500
Hea
d in
Met
ers
0
20
40
60
80
100
120
140
0
0.25
0.5
BH
P*
0.75
1.0
0
0.18
0.37
0%
10%
20%
30%
40%
kW*
EFF
0.56
0.75
Liters per Minute0 2 10 12 144 6 8 16 18
U.S. Gallons per Minute
Performance Curves
U.S. Gallons per Minute0 1 2 3 4 5 6
Liters per Minute0
Hea
d in
Fee
t
0
100
200
300
400
500
Hea
d in
Met
ers
0
20
40
60
80
100
0
0.5
1.0
T31F 2880 RPM
Head-Capacity
BHP*
% Efficiency
NPSH 4’ 7’
BH
P*
1.5
2.0
5 10 15 20
0
0.37
0.75
0%
10%
20%
30%
40%
kW*
EFF
1.12
1.49120
140
Indicates altered performance at NPSH Available* Horsepower data is valid for 1.0 specific gravity fluids only
T31 SERIES
T31
SERI
ES P
UMPS
© Copyright 2008 MTH Tool Company, Inc. Dated March 2008
Page T-6M
Performance Curves
2880 RPM
0 2 6
T31G
Head-Capacity
BHP*
% Efficiency
NPSH 4’ 7’
1 3 4 5 7 8
Hea
d in
Fee
t
0
100
200
300
400
500
Hea
d in
Met
ers
0
20
40
60
80
100
120
140
0
0.5
1.0
BH
P*
1.5
2.0
0
0.37
0.75
0%
10%
20%
30%
40%
kW*
EFF
1.12
1.49
U.S. Gallons per Minute
Liters per Minute0 5 10 15 20 25 30
2880 RPMT31H
0 10
Head-Capacity
BHP*
% Efficiency
NPSH 4’ 7’
1 2 3 4 5 6 7 8 9
Hea
d in
Fee
t
0
100
200
300
400
500
Hea
d in
Met
ers
0
20
40
60
80
100
120
140
0
0.5
1.0
BH
P*
1.5
2.0
0
0.37
0.75
0%
10%
20%
30%
40%
kW*
EFF
1.12
1.49
U.S. Gallons per Minute
Liters per Minute0 5 10 15 20 25 30 35
Indicates altered performance at NPSH Available* Horsepower data is valid for 1.0 specific gravity fluids only
T31 SERIES
T31 SERIES PUMPS
© Copyright 2008 MTH Tool Company, Inc. Dated March 2008
Page T-7M
Dimensions
Horizontal Close Coupled
NOTESAll dimensions in millimeters. May vary ± 6 MM.Not for construction purposes unless certified.*See motor dimension (Section Motors) for “C-AH” dimension (varies depending on motor enclosure).
C-AH*
2F
33
BA
30
3/4” NPT Inlet3/4” NPT Discharge
L
516.4
38D
HD
4-H
HS
22
T31 SERIES • THREE PHASE • HORIZONTAL CLOSE COUPLEDHP FRAME ENCL D E H BA 2F HS HD L
1/3 to 1 71 TEF 71.4 55.6 1/4-20 136.5 90.5 154 179.4 457.21 1/2 80 TEF 79.4 61.9 3/8-16 139.7 100 161.9 188.9 457.2
R
OT A T I O
N
IN
2513
Standard 360°Position
ROT
AT
IO
N
IN
2513
Optional 90°Position
R OT
AT
IO
N
IN
2513
Optional 270°Position
R
OTATIO
N
IN
2513
Optional 180°Position
C-AH*
2F
33
BA
30
3/4” NPT Inlet3/4” NPT Discharge
L
516.4
38
D
HD
E
4-H TAPS
25
E
304
25
25
25
HS
22
T31 SERIES • SINGLE PHASE • HORIZONTAL CLOSE COUPLEDHP FRAME ENCL A D E H BA 2F HS HD L
1/3 ~ 1 48 ODP 158.8 76.2 54 5/16-18 160.3 69.9 158.8 185.7 457.21 1/2 56 ODP 158.8 88.9 54 5/16-18 161.9 69.9 171.5 198.4 457.2
Optional Steel Base (Not included in standard price)
E EA
41.3
Optional Steel Base (Not included in standard price)
T31 SERIES
T31
SERI
ES P
UMPS
© Copyright 2008 MTH Tool Company, Inc. Dated March 2008
Page T-8M
4-H Taps
E
E
25
25
2-3/8-16 Taps
61.9
61.9
304
25
25 4-17/32 Dia. Foundation Holes
P2 Bearing Frame
R
OT A T I O
N
IN
2513
Standard 360° Position
ROT
AT
IO
N
IN
2513
Optional 90° Position
R OT
AT
IO
N
IN
2513
Optional 270° Position
R
OTATIO
N
IN
2513
Optional 180° Position
T31 SERIES WITH P2 BEARING FRAMEFRAME D U BA+N+W 2F E H K HS HD L M
56 88.9 15.9 117.5 76.2 61.9 5/16-18 15.9 158.8 161.9 609.6 4.8
HD
3/4” NPT Discharge6.4
3/4” NPT Inlet
HS D
38.1
60.39.5K 19 Dia.
4.8 KeyU Dia.M Key
L
C*
BA+N-W2F 76.2 165.1
25
22
NOTESAll dimensions in millimeters. May vary ± 6 MM.Not for construction purposes unless certified.*See motor dimension (Section Motors) for “C” dimension (varies depending on motor enclosure).
Optional Steel Base (Not included in standard price)