Goulds Pumps 3420 - IOM User Manual

Page 117

The following is a tabulation of mechanical seal horsepower draw values for common seal types and pump power end sizes.
Refer to 700.7.1 for procedures to apply mechanical seal drag.

3420 IOM 8/09

113

Speed

RPM

Seal

Siz

Diameter

Inches

4.125

5.00

5.50

6.50

7.5

8.00

9.00

12x14-15

16x18-17H

18x20-24

16x18-30

18x20-30

20x24-24

20x24-28

20x24-30

24x30-32

30x30-31

30x30-38

20x30-42

30x36-42

36x42-52

Single

Inside

1780

.62

—

1450

.51

—

1180

.41

.57

.67

—

.67

—

960

.33

—

885

.31

.42

.50

.67

.88

—

710

—

.40

—

.40

.54

.71

.80

—

590

—

.33

—

.33

.45

.59

.66

.75

505

—

.39

.50

.57

.64

Double

Tandem

1780

1.12

—

1450

.92

—

1180

.74

1.02

1.20

—

.20

—

960

.60

—

885

.56

.76

.90

1.62

1.58

—

710

—

.72

—

.72

.97

1.27

1.43

—

590

—

.60

—

.60

.81

1.06

1.19

1.34

505

—

.69

.90

1.02

1.15