![]() ![]() Vertical turbine pumps come in a wide range of capacities and pressures, and they can be used with diesel and electric drivers. These pumps can be used with raw water sources such as ponds, lakes, and rivers. However, these also typically need the most space of all types of fire pumps.Ī vertical turbine pump is the only type of pump allowed by NFPA 20, Standard for the Installation of Stationary Pumps for Fire Protectionthat can start with negative suction pressure or take water under a lift condition such as from a below grade source such as a river or subgrade tank. They are very reliable, come in a wide range of rated flow and pressure capacities, are easy to maintain due to their relatively easy split-case access, and can be used with both electric and diesel drivers. As the name implies, this is a pump installed with a split casing that can be opened for pump maintenance access and is connected to the driver by a horizontal shaft. With a horizontal split-case pump, the flow is split and enters the impeller from opposite sides of the pump housing. The following are different centrifugal type pump configurations: Centrifugal pumps can handle large volumes of water while providing high pressure boosts. The rotation of the impeller, in turn, drives the water by centrifugal force to the rim where it discharges. Water in centrifugal pumps enters the suction inlet and passes to the center of the impeller. With centrifugal pumps, pressure is developed principally by the action of centrifugal force or spinning. ![]() Positive displacement pumps are characterized by a method of producing flow by capturing a specific volume of water per pump revolution and pushing it out through the discharge line. A bicycle tire pump is an example of a positive displacement pump we commonly see. Positive displacement pumps create very high pressures but have limited flow volume compared with centrifugal pumps. These are not as common because they have a specialized use, primarily with water mist and foam-water systems.Ĭentrifugal pumps are the most common fire pumps and are used with most systems. There are two main categories of pumps: positive displacement and centrifugal. If all the factors are not taken into consideration it could result in a pump installation that does not achieve the necessary pressure requirements which could require a new pump tobe installed. It is important to select the correct type of pump for the installation project to avoid excessive costs, and to avoid excessive pressures that might damage your system. There are many types of fire pumps available. Fire pumps are an essential part of many water-based fire protection systems. They are used to increase the pressure (measured in psi and bar) of a water source when that source is not adequate for the system it’s supplying. These are commonly found in buildings that tend to have a high-pressure demand such as high-rises or storage warehouses. This blog will review the different types of fire pump options available to designers.
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