What is the most common type of fire pump used in modern applications?

The most common type of fire pump used in modern applications is the horizontal shaft pump. This type of pump is preferred due to a number of practical advantages it offers in fire protection systems. Horizontal shaft pumps typically have a simple and robust design, which makes them easier to maintain and service. They also tend to have better efficiency and reliability when used in various configurations for delivering water at the required pressure for firefighting operations.

Additionally, horizontal pumps can be designed to handle a variety of flow rates and pressures, making them versatile for different fire protection needs. Their installation can be more convenient since they don't require significant vertical space, allowing for easier integration into existing infrastructure. This is particularly advantageous in environments such as commercial buildings or industrial sites where space can be limited.

In contrast, other types of pumps like vertical shaft pumps may be used in specific situations, but they are not as commonly found across a wide range of fire protection systems. Diaphragm pumps and submersible pumps, while useful for certain applications, do not typically provide the high flow rates and pressures that are necessary for effective firefighting, further establishing horizontal shaft pumps as the standard in modern fire pump applications.