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Heavy Duty Internal Gear Pumps
Industrial Duty Pumps Offering Design Flexibility

Materials of Construction
  • Cast Iron
  • Steel
  • 316 Stainless Steel
Design Features

The heavy-duty series internal gear pumps feature thrust control, allowing them to operate to higher pressures than General Purpose Pumps.  They also offer more material options, port options, and jacketed versions for critical temperature control.

The Heavy Duty Series includes the following models:

  • 125 - Cast Iron Packed Pumps
  • 225 & 335 - Cast Iron Packed Jacketed Pumps 
  • 4125 - Cast Iron Mechanically Sealed Pumps
  • 4225 & 4335 - Cast Iron Mechanically Sealed Jacketed Pumps 
  • 123 - Steel Packed Pumps
  • 223 & 333 - Steel Packed Jacketed Pumps 
  • 4123 - Steel Mechanically Sealed Pumps
  • 4223 & 4333 - Steel Mechanically Sealed Jacketed Pumps 
  • 127 - 316 Stainless Steel Packed Pumps
  • 227 & 337 - 316 Stainless Steel Packed Jacketed Pumps
  • 4127 - 316 Stainless Steel Mechanically Sealed Pumps
  • 4227 & 4337 - 316 Stainless Steel Mechanically Sealed Jacketed Pumps 
  • 724 - 316 Stainless Steel Packed Pumps
  • 4724 - 316 Stainless Steel Mechanically Sealed Pumps
Performance
Capacity 0 - 340 m³/hr 0 - 1500 GPM
Pressure 0 - 14 BAR 0 - 200 PSI
Viscosity 0.1 - 1,000,000 cSt 28 - 4,000,000 SSU
Temperature -85 - 430 C -120 - 800 F
Specifications

Note:  Models shown in yellow below are also available in a Universal Seal version with additional features and options to the standard Heavy-Duty design.
  

Cast Iron and Steel Models

Size

Standard Port

Nominal Capacity at Maximum Speed

Maximum Speed

Maximum Pressure*

Inches

m³/hr

GPM

RPM

BAR

PSI

G

1

2

8

1800

14

200

H

1.5

3

15

1800

14

200

HL

1.5

7

30

1800

14

200

AK

2

11

50

1200

14

200

AL

2

17

75

1200

14

200

K

2

17

75

780

14

200

KK

2

23

100

780

14

200

L

2

31

135

640

14

200

LQ

2.5

31

135

640

14

200

LL

3

32

140

520

14

200

LS

3

45

200

640

14

200

Q

4

68

300

520

14

200

M

4

95

420

420

14

200

QS

6

114

500

520

14

200

N

6

136

600

350

8.5

125

R

8

250

1100

280

8.5

125

P

10

340

1500

230

8.5

125

316 Stainless Steel Models

Size

Standard Port

Nominal Capacity at Maximum Speed

Maximum Speed

Maximum Pressure*

Inches

m³/hr

GPM

RPM

BAR

PSI

F

0.5

0.3

1.5

1800

14

200

FH

0.75

0.7

3

1800

14

200

G

1

1

5

1200

14

200

H

1.5

2

10

1200

10

150

HL

1.5

5

20

1200

10

150

K

2

11

50

520

10

150

KK

2

15

65

520

10

150

LQ

2.5

21

90

420

10

150

LL

3

25

110

420

10

150

LS

3

36

160

520

8.5

125

Q

4

45

200

350

8.5

125

M

4

64

280

280

8.5

125

QS

6

71

310

350

8.5

125

N

6

138

600

280

7

100

R

8

250

1100

280

7

100

* Max. Differential Pressure

Literature

Click here to view literature for the 125, 4125, 123, 4123, 127, & 4127 models.
Click here to view literature for the 225, 4225, 223, 4223, 227, & 4227 jacketed models.
Click here to view literature for the 335, 4335, 333, 4333, 337, & 4337 jacketed models.
Click here to view literature for the 724 & 4724 models.

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