STOW CP-20H — GENERAL INFORMATION

APPLICATION

The STOW Model CP-20H Centrifugal Pump is designed to be used for de-watering applications. Both the suction and discharge ports on the STOW CP-20H pump use a 2-inch diameter opening, which allows the pump to pump at a rate of approximately 158 gallons/minute (gpm) or 598 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 trash pump is powered by an 4.0 horsepower air cooled 4- stroke, single cylinder HONDA GX-120gasoline engine that incorporates a low "Oil Alert Feature"

Oil Alert Feature

In the event of low oil or no oil, the HONDA GX-120 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

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)

 

 

 

 

 

 

 

 

 

 

 

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 soild 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 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.

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 — STOW CP-20H CENTRIFUGAL PUMP — PARTS MANUAL — REV. #0 (05/30/03)

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Stow manual Stow CP-20H General Information
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CP-20H specifications

The Stow CP-20H is a versatile and robust compact tractor designed for a variety of agricultural tasks, combining efficiency, ease of use, and advanced technology. This model is particularly favored by small to mid-sized farm operations, landscaping companies, and hobby farmers due to its compact size and powerful performance.

One of the standout features of the Stow CP-20H is its reliable 20 horsepower engine, which provides ample power for a range of implements and attachments. The engine is designed for fuel efficiency, helping users to minimize operational costs while maximizing productivity. The unit is equipped with a hydrostatic transmission, which allows for seamless speed adjustments without the need for manual gear shifting. This feature provides enhanced maneuverability, making it easier to navigate tight spaces and perform delicate tasks.

The Stow CP-20H also excels in terms of comfort and usability. The operator’s platform is spacious and ergonomically designed, featuring a high-backed seat that reduces fatigue during extended periods of use. Additionally, the controls are intuitively laid out, allowing for easy access and operation. The tractor's compact design ensures a tight turning radius, which is beneficial when working in confined areas.

One of the technological highlights of the CP-20H is its hydraulic system, which maximizes lifting capability and implement performance. With a strong lift capacity, the tractor can handle a variety of attachments such as loaders, backhoes, and mowers, making it an excellent multi-tasker. The three-point hitch system is also noteworthy, as it allows for quick attachment and detachment of implements.

In terms of safety and durability, the Stow CP-20H is built with a sturdy frame and well-designed protective features. It is equipped with ROPS (Roll Over Protection Structure) to enhance operator safety in uneven terrain. The tractor's construction is designed to withstand the rigors of daily use, ensuring longevity.

Overall, the Stow CP-20H stands out as a reliable compact tractor that combines power, versatility, and user-friendly features. Its advanced technology and robust design make it an ideal choice for those seeking an efficient solution for various agricultural and landscaping tasks. Whether it’s mowing fields, plowing gardens, or transporting materials, the Stow CP-20H is equipped to handle the demands of diverse farming projects effortlessly.
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