60Hz

S T A I N L E S S S T E E L

MH/MHN Series

Special mechanical Seals on request.

Higher liquid and ambient temperatures

on request.

Available with TEFC, 1 Phase & 3 Phase

motors also.

Special features on request SEI MH/MHN series, Non Self Priming, Multi Stage, Horizontal

Centrifugal Pump is a compact booster pump. The pump has

horizontal suction port and vertical discharge port. All wet

moving parts on MH series are made of Stainless Steel 304 for

long life and better efficiency. On the MHN series the suction

and delivery housings are also stainless steel 316 making all parts

in contact with the pumped liquid made of Stainless Steel 316.

Strong mechanical seal is provided for leak free operation.

MultistageBooster Pump

Special Features

SEI MH/MHN series, Non Self Priming, Multi Stage,Horizontal Centrifugal Pump is a compact boosterpump. The pump has horizontal suction port andvertical discharge port. All wet moving parts on MHseries are made of Stainless Steel 304 for long life andbetter efficiency. On the MHN series the suction anddelivery housings are also stainless steel 316 makingall parts in contact with the pumped liquid made ofStainless Steel 316. Strong mechanical seal isprovided for leak free operation. NEMA Standard 56JODP (3450 RPM) Motor is used in all pumps.

Pressure booster system.Domestic Water supply.Air Conditioning and Cooling system.High Pressure Liquid Circulation andpumping in Industries.Gardening and Agriculture.

Application

Multistage Booster Pump

Pumped liquids

MHThin, clean, non-aggressive and non-explosiveliquids without solid particles or fibers.

MHNThin, clean, slightly aggressive and non-explosiveliquids without solid particles or fibers.

Performance Curve MH/MHN2

Performance Table MH/MHN2

28

42

56

68

84

25

38

51

61

76

22

33

44

53

66

MODEL

MH2/MHN262

MH2/MHN263

MH2/MHN264

MH2/MHN265

MH2/MHN266

Head in psi

2 4 6 8 10 12 14 16Max.

psi

38

56.5

75

92

111

36

55

73

89

108

35

52

70

85

103

33

49

66

80

98

31

46

62

75

91

39.0

58.0

77.0

93.0

113.0

MH2/MHN272

MH2/MHN273

MH2/MHN274

MH2/MHN275

MH2/MHN276

1 Phase 3 Phase

Discharge in US gpm

HP

0.50

0.50

0.75

0.75

1.00

0 2 4 6 8 10 12 14 16 18 20

0

10

20

30

40

50

60

70

80

90

100

110

120

HE

AD

(PS

I)

DISCHARGE (GPM)

MH2/MHN266 / MH2/MHN2761.0

HP

MH2/MHN266 / MH2/MHN2761.0

HPMH2/MHN265 / MH2/MHN275

0.75HP

MH2/MHN265 / MH2/MHN2750.75

HP

MH2/MHN264 / MH2/MHN2740.75 HP

MH2/MHN264 / MH2/MHN2740.75 HP

MH2/MHN263 /

3

MH2/MHN270.5

PH

MH2/MHN263 /

3

MH2/MHN270.5

PH

2

Performance Curve MH/MHN4

Operating conditions

Liquid temperature range: 32°F to +194°FMax. ambient temperature: 104°F.

The maximum operating pressure depends onthe temperature of the pumped liquid, see table:

Max. operating pressure 145 psi (10 bar) 87psi (6 bar)

MH2, MHN2MH4, MHN4

32 F to + 104 Fo o

+105 F to + 176 Fo o

For pipe connections, see the table:

Connections MH2, MHN2 MH4, MHN4

Axial suction port NPT 1"

Radial discharge port

Drain hole, priming hole

NPT 1"

NPT 3/8"

NPT 1¼"

NPT 1"

NPT 3/8"

0

10

20

30

40

50

60

70

80

90

100

110

120

130

HE

AD

(PS

I)

0 5 10 15 20 25 30 35 40 45 50 55 60 65

DISCHARGE (GPM)

MH4/MHN466/ M

H4/MHN476

3.00HP

MH4/MHN466/ M

H4/MHN476

3.00HP

MH4

M

/MNH

465 /H4/M

4HN

752.00

HP

MH4

M

/MNH

465 /H4/M

4HN

752.00

HP

MH4/MH

M

N464 / MH4/HN474 1.50 HP

MH4/MH

M

N464 / MH4/HN474 1.50 HP

MH4/4

MHN 63 / MH4/MHN473 1.00 HP

MH4/4

MHN 63 / MH4/MHN473 1.00 HPMH4/MHN462 / MH4/MHN472 0.75 HP

MH4/MHN462 / MH4/MHN472 0.75 HP

Performance Table MH/MHN4

26

39

55

65

84

22

34

48

57

75

18

28

41

49

63

13

22

32

38

49

MODEL

MH4/MHN462

MH4/MHN463

MH4/MHN464

MH4/MHN465

MH4/MHN466

5 10 15 20 25 30 35 40 45 50 55Max.

psi

38

56

78

94

116

36

53

73

89

111

34

50

69

83

104

31

47

64

78

98

29

43

60

72

91

13

22

32

38

49

3

7

11

13

18

39.7

59.3

82.2

99.5

121.7

MH4/MHN472

MH4/MHN473

MH4/MHN474

MH4/MHN475

MH4/MHN476

1 Phase 3 Phase

HP

0.75

1.00

1.50

2.00

3.00

3

Discharge in US gpm

Head in psi

MH262

MH272

MH263

MH273

MH264

MH274

MH265

MH275

MH266

MH276

MHN262

MHN272

MHN263

MHN273

MHN264

MHN274

MHN265

MHN275

MHN266

MHN276

1"

1"

1"

1"

1"

1"

1"

1"

1"

1"

Cast-IronModel

Stainless steelModel

Inlet(NPT)

Outlet(NPT)

1"

1"

1"

1"

1"

1"

1"

1"

1"

1"

B

4-7/8

4-7/8

4-7/8

4-7/8

4-7/8

4-7/8

4-7/8

4-7/8

4-7/8

4-7/8

C

8-17/64

8-17/64

8-31/32

8-31/32

9-11/16

9-11/16

10-25/64

10-25/64

11-7/64

11-7/64

D

3-1/2

3-1/2

3-1/2

3-1/2

3-1/2

3-1/2

3-1/2

3-1/2

3-1/2

3-1/2

E

6-33/64

6-33/64

6-33/64

6-33/64

6-33/64

6-33/64

6-33/64

6-33/64

6-33/64

6-33/64

F

15-3/4

15-3/4

16-27/64

16-27/64

18-1/32

18-1/32

18-45/64

18-45/64

19-51/64

19-13/32

G

6-19/64

6-19/64

6-19/64

6-19/64

6-19/64

6-19/64

6-19/64

6-19/64

6-19/64

6-19/64

H

1-13/16

1-13/16

1-13/16

1-13/16

1-13/16

1-13/16

1-13/16

1-13/16

1-13/16

1-13/16

I J

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3-15/64

3-15/64

4-41/64

4-41/64

5-23/64

5-23/64

6-1/16

6-1/16

6-49/64

6-49/64

Dimensions In Inches Ship Wt.(Lbs)

27

26

29

28

33

32

34

32

35

33

Discharge

H J

G

A

I

C

F

D

B

E

MH462

MH472

MH463

MH473

MH464

MH474

MH465

MH475

MH466

MH476

MHN462

MHN472

MHN463

MHN473

MHN464

MHN474

MHN465

MHN475

MHN466

MHN476

1¼"

1¼"

1¼"

1¼"

1¼"

1¼"

1¼"

1¼"

1¼"

1¼"

Cast-IronModel

Stainless steelModel

Inlet(NPT)

Outlet(NPT)

1"

1"

1"

1"

1"

1"

1"

1"

1"

1"

A B

4-7/8

4-7/8

4-7/8

4-7/8

4-7/8

4-7/8

4-7/8

4-7/8

4-7/8

4-7/8

C

8-37/64

8-37/64

9-11/16

9-11/16

10-47/64

10-47/64

11-13/16

11-13/16

12-7/8

12-7/8

D

3-1/2

3-1/2

3-1/2

3-1/2

3-1/2

3-1/2

3-1/2

3-1/2

3-1/2

3-1/2

E

6-33/64

6-33/64

6-33/64

6-33/64

6-33/64

6-33/64

6-33/64

6-33/64

6-33/64

6-33/64

F

16-59/64

16-59/64

18-1/2

18-7/64

19-19/64

18-1/2

21-29/64

20-9/32

24-1/64

23-1/32

G

6-19/64

6-19/64

6-19/64

6-19/64

6-19/64

6-19/64

6-13/16

6-13/16

6-13/16

6-13/16

H

1-13/16

1-13/16

1-13/16

1-13/16

1-13/16

1-13/16

1-13/16

1-13/16

1-13/16

1-13/16

I J

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

3.00

4-21/64

4-21/64

5-13/32

5-13/32

6-1/2

6-1/2

7-37/64

7-37/64

8-21/32

8-21/32

Dimensions In Inches Ship Wt.(Lbs)

31

30

35

31

46

38

50

47

62

58

-

-

-

-

-

-

-

-

5.0

5.0

Inlet

Discharge

Inlet

JH

G

I

F

C

D

B

E

Dimensions and weights

7150 W Roosevelt St Ste C107 Phoenix AZ 85043.

Ph: 888 938 3783, Cell: 818 231 0455, Fax: 888 638 0797www.seipumps.com

Product Improvement is a continuous process at ‘SEI’. The data given in this publication is therefore subject to revision.