QP-402H — GENERAL INFORMATION

APPLICATION

The QP204H 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 QP-402H pump use a 4-inch diameter opening, which allows the pump to pump at a rate of approximately 425 gallons/minute (gpm) or 1,615 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 flow 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.

Power Plant

This centrifugal pump is powered by either a Honda GX240K1 (8.0 H.P.) or a Honda GX240U1 (7.1 H.P.) air cooled 4-stroke, single cylinder gasoline engine that incorporates a low "Oil Alert Feature."

Oil Alert Feature

In the event of low oil or no oil, the HONDA GX-240 engine has a built-in oil alarm engine shut-down feature. In the event the oil level is low the engine will automatically shut-down.

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 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, 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 fittings could prevent the pump from priming.

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)

 

 

Feet (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 4 shows percentage drops in performance as elevation increases.

Table 4. Performance Loss at Various

Elevations

Altitude

Discharge Flow

Discharge Head

Feet (Meters

 

 

 

 

 

Sea Level

100%

100%

 

 

 

2,000 (610)

97%

95%

 

 

 

4,000 (1,219)

95%

91%

 

 

 

6,000 (1,829)

93%

87%

 

 

 

8,000 (2,438)

91%

83%

 

 

 

10,000 (3,048)

88%

78%

 

 

 

PAGE 12 — QP-402H CENTRIFUGAL PUMP — OPERATION AND PARTS MANUAL — REV. #1 (04/02/08)

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Multiquip qp-402h manual QP-402H General Information, Application

qp-402h specifications

The Multiquip QP-402H is a powerful, versatile piece of construction equipment designed for a range of applications, particularly in the construction and operational sectors. Known for its durability and efficiency, the QP-402H is a part of Multiquip’s extensive portfolio of equipment that adheres to the high standards of reliability and performance.

One of the standout features of the QP-402H is its robust Honda GX160 engine, which delivers superior power and performance. The engine is designed for optimal fuel efficiency, allowing operators to maximize their productivity while minimizing operational costs. This machine is engineered to handle a wide variety of tasks, from producing high-quality concrete to powering various construction tools, making it an invaluable asset on job sites.

In terms of design, the QP-402H features a heavy-duty construction, which ensures its longevity even under strenuous working conditions. The unit is equipped with an advanced compressor system that provides consistent air supply for up to four pneumatic tools simultaneously. This multi-tool capability significantly enhances productivity on the job site, allowing crews to work more efficiently without having to wait for equipment to become available.

The QP-402H incorporates sophisticated technologies to ensure user-friendly operation. Its intuitive controls are designed to be easily accessible, enabling operators to quickly adjust settings and manage functions with minimal effort. Additionally, the compact design of the unit allows for easy transportation and maneuverability, making it a suitable choice for both large scale and tight-space projects.

Another notable characteristic of the QP-402H is its low noise level, which is increasingly important in urban environments where noise regulations are strict. This quiet operation ensures that tasks can be completed with minimal disruption, promoting better relations with surrounding communities.

Safety is a primary consideration in the design of the Multiquip QP-402H. The machine is equipped with various safety features, including a protective cage for the engine and secure fastenings for operational stability. These features contribute to a safer working environment for operators and personnel on-site.

In conclusion, the Multiquip QP-402H stands out as a reliable, efficient, and versatile solution in the realm of construction equipment. Its powerful engine, user-friendly technologies, robust construction, and safety features make it an ideal choice for professionals who require high-performance equipment that can handle varied demands in challenging environments.