Product Manual A

Operation

40 MTP4000-6000DZV/DZD Operating Manual 31609 A

openings to equal 28 sq. in. (181 sq. cm) or more (6 in. pump). The screen should be rigid enough to pre-

vent collapse when flow is reduced due to clogging.

Figure 14 - Suction Specifications

6. Place the intake hose into the liquid to be pumped. The submergence of the suction pipe into the liquid

should be at least four to five times the pipe diameter. If this is not possible, provide a baffle or a floating

board. This is to prevent any vortex action from allowing air into the pipe/hose. For best performance, a bell

mouth fitting is recommended. Recommended pipe submergences for various flows as well as recom-

mended bell diameters are shown in the table below. The table data is referenced from ANSI/HI 9.8-1998.

Table 1: Pipe Submergences

FLOW (GPN) 500 1000 1500 2000 2500 3000 3500 4000 4500

SUMMERGENCE WITH BELL (FT)

Bell Diameter (in) 6.1 8.6

10.6

12.2 13.6 14.9 16.1 17.2 18.3

Submergence (ft) 2.1

2.6 3.0

3.3 3.5 3.7 3.9 4.1 4.3

SUBMERGENCE WITHOUT BELL (FT)

PIPE ID (in) - No

Bell

SUBMERGENCE WITHOUT BELL (FT)

3 4.7

4 3.3

6.3

A = Suction Lift: The distance between the centerline of

the pump impeller and the surface of the liquid being pumped.

B = Vertical Discharge Head: Vertical distance from the centerline of

the pump inlet to the centerline of the highest point of discharge.

C = Total Dynamic Head (TDH): Suction lift plus vertical discharge

plus friction loss.

Note: To calculate PSI, divide TDH in feet by 2.31.

TDH (35 ft)

2.31

Example: = 15.15 PSI

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