Handbook of Civil Engineering Calculations

ments. This procedure is the work of R. P. Horwitz, Hydrodynamics Division, Peerless
Pump, FMC Corporation, as reported in Power magazine.

TOTAL HEAD ON A PUMP HANDLING

VAPOR FREE LIQUID

Sketch three typical pump piping arrangements with static suction lift and submerged,
free, and varying discharge head. Prepare similar sketches for the same pump with static
suction head. Label the various heads. Compute the total head on each pump if the eleva-
tions are as shown in Fig. 4 and the pump discharges a maximum of 2000 gal/min (126.2
L/s) of water through 8-in (203.2-mm) schedule 40 pipe. What hp is required to drive the

Total

static

head

Static

discharge

Static

suction

(a) Suction lift and

submerged discharge

Pump shaft

Total

static

head

Static

surtion

Static

discharge

Free discharge

Pump shaft

(b) Suction lift and free

discharge

Maximum level

Static

discharge

Total

static

head

Pump shaft

Low

level

Total

static

head

(c) Suction lift and

varying discharge head

Static suction

head = l5'(4.6m)

Static

discharge

head* 100'

Pumpshoft

(d ) Static suction head and

submerged discharge

Maximum level

Static

discharge

head

Total

Static

head

Static suction

Pump

shaft

(f) Static suction head and

varying discharge head

Pressure

Static discharge tank

head+ head due

to pressure

Pump shaft

Static Low level

suction head

Total

static

head

FIGURE 4. Typical pump suction and discharge piping arrangements.

(e) Static suction head and

discharge head due to elevation

and pressure in tank