What is Pressure Drop or Delta P?
Filter pressure drop, also known as pressure loss, delta p, or pressure drop across the filter, refers to the difference in pressure on either side of a filter as fluid flows through it. It is typically expressed in units of pressure, such as pounds per square inch (psi) and is occasionally expressed as pounds per square inch differential (psid).
The pressure drop across a filter can be affected by several factors, including the size and type of the filter media, the flow rate of the fluid being filtered, and the viscosity and density of the fluid. In general, as the flow rate of the fluid increases, the pressure drop across the filter will also increase.
The pressure drop across a filter can be used to estimate the energy required to pump fluid through the filter, as well as to determine when the filter needs to be replaced or cleaned. For example, if the pressure drop across a filter increases significantly over time, it may be an indication that the filter is becoming clogged and needs to be replaced or cleaned.
It is important to consider the pressure drop across a filter when designing a filtration system, as a high pressure drop can result in increased energy costs and reduced system efficiency.