Head is the height at which a pump can raise water up, that’s it, it’s that simple. Figure 2 The meaning of head. Connect a tube to the discharge of a pump and measure the water height, that the head of the pump.

Many medium and larger centrifugal pumps offer efficiencies of 75 to 93 percent and even the smaller ones usually fall into the 50 to 70 percent range. Large AC motors, on the other hand, approach an efficiency of 97 percent, and any motor—ten horsepower and above—can be designed to break the 90 percent barrier.

The operating point of the system “pump / network” is the flow rate that balances the pressure supplied by the pump and pressure necessary for the operation of the network flow.

Centrifugal pumps

2) Self Priming Monoblock Water Pump 0.5HP This pump can lift water from up to 15 feet Depth & list water up to 35 feet in height.

There are three basic types of pumps: positive-displacement, centrifugal and axial-flow pumps.

Pumps have the ability to move liquids or gases. Compressors typically only move gas due to its natural ability to be compressed. Pumps and compressors both have very high pressure rises. There are different types of compressors that move air into a chamber.

The first resistance is created by the pump volute (casing), which catches the liquid and slows it down. When the liquid slows down in the pump casing, some of the kinetic energy is converted to pressure energy. A pump does not create pressure, it only creates flow. Pressure is a measurement of the resistance to flow.

The purpose of the compressor is to circulate the refrigerant in the system under pressure, this concentrates the heat it contains. At the compressor, the low pressure gas is changed to high pressure gas.

Centrifugal pumps are used to induce flow or raise a liquid from a low level to a high level. These pumps work on a very simple mechanism. A centrifugal pump converts rotational energy, often from a motor, to energy in a moving fluid.

All pumps use basic forces of nature to move a liquid. As the moving pump part (impeller, vane, piston diaphragm,etc.) begins to move, air is pushed out of the way. The movement of air creates a partial vacuum (low pressure) which can be filled up by more air, or in the case of water pumps, water.

The main function of motor is to change the energy from electrical to mechanical. A pump operates with a motor otherwise an engine. The motor operates with an energy source. A pump moves liquid with the help of forces such as air.

What do water pumps do? The main purpose of a water pumping system is to move water from one area to another. They are often applied to construction sites as a form of water extraction, assisting in the removal of water when excavating, at sewage plants, in flooded areas or when dealing with water wells and oil wells.

The impeller, on the opposite side to the eye, is connected through a drive shaft to a motor and rotated at high speed (typically 500-5000rpm). The rotational motion of the impeller accelerates the fluid out through the impeller vanes into the pump casing.

If the impeller runs backwards, the liquid is still discharged from the pump. This is due to centrifugal forces that move the fluid in the normal direction. The risk of reverse rotation is higher when putting in a new pump system, or replacing parts.

Impellers must turn in a direction so that the fluid is pushed (not scooped) through the pump (see sample drawing below). Exceptions are pumps with straight vane impellers (vanes perpendicular to the shaft) and shrouded impellers. Straight vane impellers function in either direction.

1. Zinc was observed to be the most efficient impeller material with greater pump head and flow rate than the cast iron impeller and the bronze impeller. 2. Depending on pumping system requirement, zinc impeller is only recommended for low- speed pump speed requirements (say with the pump speed of less than 2850rpm).

Measure the outer most tip of the blade to the center of the bore to obtain the radius. Therefore, a propeller or impeller that measures a radius of 3” from the tip of the blade to the center of the bore will have a diameter of 6”. (A 3” radius multiplied x 2 equals a 6” diameter.)

The impeller of a centrifugal pump can be of three basic types:

• Open impeller. Open impellers have the vanes free on both sides.
• Semi-open impeller. The vanes are free on one side and enclosed on the other.
• Closed impeller. The vanes are located between the two discs, all in a single casting.

Propellers and impellers both provide thrust, but do it in different ways. A propeller is a fan which propels a fluid by pushing against it: it converts rotational motion into linear motion. An impeller is a rotor that produces a sucking force, and is part of a pump.

Bottom-line: The vanes of centrifugal pumps are curved backward to prevent overloading of the impeller motor. However, forward curved CP are sometimes used when the fluid concerned is air, as in a centrifugal fan.

An impeller is a rotating iron or steel disc with vanes in a centrifugal pump. Impellers transfer energy from the motor that drives the pump to the fluid being pumped by accelerating the fluid radially outwards from the centre of rotation.

There are three basic types of an aircraft propeller, each with its own variations – the fixed pitch propeller, constant speed propeller or the ground adjustable propeller.

In general, 2-blade propellers are slightly more efficient. However, efficiency doesn’t propel an airplane, thrust does.

developed two types of propeller shafts using alternative materials: Carbon Fiber Reinforced Plastic (CFRP) Propeller Shaft & Aluminum Propeller Shaft. They are part of Drive Train products.

Propeller blade tracking. Blade Tracking. Blade tracking is the process of determining the positions of the tips of the propeller blades relative to each other (blades rotating in the same plane of rotation). Tracking shows only the relative position of the blades, not their actual path.