Inline Type Circulation Pump

Inline Type Circulation Pump

In its most general definition, a pump is a machine that transfers some of the energy it receives to the liquid passing through it, thus increasing the energy of the liquid passing through it.

In general, mechanical devices used to transport all kinds of fluids from one place to another are called “pumps”. The pump can be used to increase the flow of liquid flowing from a low level to a higher level, from a low pressure area to a higher pressure area, sometimes in systems with very high friction losses, from high levels to low levels. B.C. The first pump was found by Archimedes in the 3rd century. There are many types and models of pumps. The materials from which the pump will be produced vary according to the liquid to be transported. In this article, we will talk about inline (can be attached to straight pipe) type circulation pumps.

Inline type means pumps that can be attached to a straight pipe, that is, their suction and discharge flanges are on the same line and can be directly connected to the installation. Inline pumps are used in water treatment systems, industrial applications, closed circuit systems, heating and cooling systems. Here, there is a single-stage, monoblock, closed impeller system. These pumps can be requested as twin type and single type.

The pump control of the twin pump operates the pumps sequentially, ensuring that the pumps operate for equal times. They also provide cost savings when compared to using two single pumps.

We need to consider many factors when choosing a pump. In accordance with the working principle of the pump, it should be clear how much water and how high it will press. The flow rate of the water and the pressure at which the water will come out must be certain. Factors such as temperature, type, density of the liquid should also be considered.

These pumps can be produced with frequency control (variable speed) or fixed speed. Frequency controlled pumps work according to the pressure difference. When the system pressure drops, it sends low pressure to the system by reducing the number of revolutions. Energy saving is very important for sustainability.

Considering that the share of pumps in world electricity consumption is 20%, using energy efficient pumps can reduce electricity consumption.

Also, Inline type circulation pumps can be dry type or wet type. It is expressed as wet rotor and dry rotor.

The motor shaft of dry rotor pumps should be positioned horizontally as the motor is lubricated by the pumped water. If mounted vertically, there will be insufficient lubrication. Wet rotor pumps have lower installation costs but are less energy efficient than dry rotor pumps. Available in low power pumps.

Dry rotor pumps are more efficient and more reliable. It may be more expensive as the first price, but when we evaluate the whole process, it is more advantageous due to its longevity.

Usage Areas of Inline Type Circulation Pump?

Circulation pumps are pumps used for circulation of liquid in closed circuit heating and cooling systems. It can be used to circulate both hot and cold water in heating, cooling, air conditioning (HVAC) systems in all living spaces. The product models are also suitable for industrial use. Combi boiler, boiler, etc. They circulate the liquid in places, single-phase and three-phase motor options are available.

Hot water circulation pump; in the heating cycle, boiler, floor heating, wall-mounted condensing boiler, etc. Radiator, fancoil, heat exchanger, etc., located at the top of the building and at the furthest point from the boiler (critical circuit) of the hot water prepared in the hot water producers. It provides a smooth transmission to the heat exchanger. The circulation pump used in the cooling circuit is; chiller group, cooling tower etc. The water taken from the cold water producers is transferred to the heat exchanger at the end of the installation, fan-coil, air handling unit, etc. allows transmission.

Recirculation pump; It ensures that the resistances of straight pipes and local fixtures (valves, fittings, etc.) on the transmission line are overcome.

Circulators can be divided into groups as gland and flanged circulation pumps, as well as wet rotor circulation pumps, dry circulation pumps and new generation frequency-controlled circulation pumps.

What Should Be Considered While Buying an Inline Type Circulation Pump?

There are three important parameters that should be examined before choosing a pump. If these three parameters, which we can specify as the pump type, the fluid with which the pump will be used, and the installation to which the pump will be connected, are not properly examined. It is likely that the system will either not work or will operate inefficiently and cause a serious energy consumption.

When choosing a pump, the chemical and physical properties of the fluid to be pumped must be determined in detail.

Finally, the environmental conditions, location, temperature, altitude, piping, installation elements, control controls of the pump and other equipment, which we call the installation, should be analyzed and the most suitable conditions should be provided.

What are the Inline Type Circulation Pump Types?

Inline Type Circulation pump can be dry rotor or wet rotor. In a dry rotor pump, the components that come into contact with the fluid are separate from the motor. In wet rotor pumps, all moving parts such as shaft and impeller are located inside the rotor liner together with the transferred fluid. Cooling and lubrication are done with the transferred fluid. Advantages of dry rotor inline type circulation pump;

– Lime etc. It has a higher chance of working with different types of liquids containing polluting effects.

– Can be mounted in vertical position.

– There is a wide range of products.

Advantages of inline type circulation pump with wet rotor;

– Operates with lower volume.

– It is possible to operate on 3 different hydraulic curves.

Frequency-controlled and fixed-speed variants are also available.

The frequency converter compares the pressure information in the suction and discharge lines of the system and works according to the differential pressure principle.

It increases or decreases the speed of the variable speed pump in order to fix the pressure difference to the set value.

With decreasing pressure requirement, the power drawn from the network decreases thanks to the reduced pump speed. Significant energy savings are achieved by reducing the pump input power.