General Information - MULTIQUIP QP2TK Operation Manual

APPLICATION
The QP2TK Trash Pump is designed for dewatering
applications. Both the suction and discharge ports on the
this trash pump use a 2-inch diameter opening, which
allows the pump to pump at a rate of approximately 172
gallons/minute (gpm) or 650 liters/minute (lpm).
This Wet Primed pump requires that the pump casing
is first filled with water to assist with initial self-priming
operations. Once a partial vacuum is created within the
unit, the reduced atmospheric pressure allows water to
flow through the suction line and the centrifugal force of
the impeller/volute assembly permits water to be expelled
from the discharge ports.
ENGINE
This trash pump is powered by a 6.0 HP, oil and air-cooled
KUBOTA diesel engine.
TRASH PUMP
Trash pumps derive their name from their ability to handle
a greater amount of debris and solids than standard
centrifugal pumps. This pump generally handles solids up
to 1/2 the size of the discharge opening making them less
likely to clog. Also trash pumps are capable of handling
water with 25% solids by weight.
The advantage of using a trash pump is that it can be quickly
and easily disassembled in the field "without tools" and
easily cleaned when clogged.
SUCTION LIFT
This pump is intended to be used for dewatering applications
and 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 in 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 fittings could
prevent the pump from priming.
QP2TK TRASH PUMP • OPERATION MANUAL — REV. #4 (05/20/20) — PAGE 11

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 4 shows suction lift at various elevations.
Table 4. Suction Lift at Various Elevations
Altitude
Feet Suction Lift in Feet (Meters)
(Meters)
Sea Level 10.0 (3.048) 15.0 (4.572) 20.0 (6.096) 25.0 (7.620)
2,000 (610) 8.80 (2.680) 13.2 (4.023) 17.6 (5.364) 22.0 (6.705)
4,000 (1,219) 7.80 (2.377) 11.7 (3.566) 15.6 (4.754) 19.5 (5.943)
6,000 (1,829) 6.90 (2.103) 10.4 (3.169) 13.8 (4.206) 17.3 (5.273)
8,000 (2,438) 6.20 (1.889) 9.30 (2.834) 12.4 (3.779) 15.5 (4.724)
10,000 (3,048) 5.70 (1.737) 8.60 (2.621) 11.4 (3.474) 14.3 (4.358)
Table 5 shows percentage drops in performance as
elevation increases.
Table 5. Performance Loss at Various Elevations
Altitude
Discharge Flow
Feet (Meters)
Sea Level
2,000 (610)
4,000 (1,219)
6,000 (1,829)
8,000 (2,438)
10,000 (3,048)
Discharge Head
100% 100%
97% 95%
95% 91%
93% 87%
91% 83%
88% 78%