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DESCRIPTION
The QP2E Centrifugal Pump is designed to handle all
types of clear water applications. It is ideal for residential
use such as dewatering basements and swimming pools.
Both the suction and discharge ports on the pump use a
2-inch diameter opening, which allows the pump to pump
at a rate of approximately 158 gallons/minute (gpm) or 600
liters/minute (lpm).
Centrifugal or self-priming pumps are designed to purge
air from the suction line and create a partial vacuum in the
pump body. The reduced atmospheric pressure inside the
pump allows water to fl ow through the suction line and
into the pump body. The centrifugal force created by the
rotating impeller pressurizes the water and expels it from
the pump.
ENGINE
This centrifugal pump is powered by an air-cooled 4-cycle,
single cylinder Robin EX130D51111 gasoline engine.
STANDARD CENTRIFUGAL PUMP
Standard centrifugal pumps provide an economical choice
for general purpose dewatering. These types of pumps
should only be used in clear water applications (agricultural,
industrial, residential) as they have a limited solid handling
capability of only 10% by volume.
SUCTION LIFT
This pump is capable of suction lifts up to 25 feet at sea
level. For optimal suction lift performance keep the suction
hose or line as short as possible. In general, always place
the pump as close to the water as possible.
PUMP SUPPORT
The pump should always be placed on solid stationary
ground, on a level position.
NEVER place the pump on soft soil. The suction hose or
pipe connection should always be checked for tightness
and leaks. A small suction leak in the hose or fi ttings could
prevent the pump from priming.
PAGE 12 — QP2E CENTRIFUGAL PUMP • OPERATION AND PARTS MANUAL — REV. #0 (02/12/09)
GENERAL INFORMATION
ELEVATION
Higher elevations will effect the performance of the pump.
Due to less atmospheric pressure at higher altitudes,
pumps do not have the priming ability that they have at
sea level. This is due to the "thinner air" or lack of oxygen
at higher altitudes.
A general rule of thumb is that for every 1,000 feet of
elevation above sea level a pump will lose one foot of
priming ability.
For example, in Flagstaff, Arizona where the elevation is
approximately 7,000 feet, the pump would have a suction
lift of only 18 feet rather than the 25 feet at sea level. Table 3
shows suction lift at various elevations.
Table 3.
Suction Lift at Various Elevations
Altitude
Suction Lift in Feet (Meters)
Ft (Meters)
10.0
Sea Level
(3.048)
8.80
2,000 (610)
(2.680)
7.80
4,000 (1,219)
(2.377)
6.90
6,000 (1,829)
(2.103)
6.20
8,000 (2,438)
(1.889)
5.70
10,000 (3,048)
(1.737)
Table 4 shows percentage drops in performance as
elevation increases.
Table 4.
Performance Loss at Various Elevations
Altitude
Discharge Flow
Ft (Meters)
Sea Level
100%
2,000 (610)
97%
4,000 (1,219)
95%
6,000 (1,829)
93%
8,000 (2,438)
91%
10,000 (3,048)
88%
15.0
20.0
25.0
(4.572)
(6.096)
(7.620)
13.2
17.6
22.0
(4.023)
(5.364)
(6.705)
11.7
15.6
19.5
(3.566)
(4.754)
(5.943)
10.4
13.8
17.3
(3.169)
(4.206)
(5.273)
9.30
12.4
15.5
(2.834)
(3.779)
(4.724)
8.60
11.4
14.3
(2.621)
(3.474)
(4.358)
Discharge Head
100%
95%
91%
87%
83%
78%
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