Outside of efficiency, the low slip design of the Waukesha Universal series pump allows us to accomplish four useful things- it allows us to pump low viscosity fluids in low NIPA systems, it allows us to pump from vacuum vessels, self-prime, and meter fluids. This post will look at each of these four benefits and why they are important to system performance.
One of the most common errors made when sizing an ECP pump, such as the Waukesha Universal 1 or Universal 2 series pump, is failing to take into consideration the range of product viscosities the pump will handle. This post will focus on that issue and what steps we can take to ensure adequate drive speed range is selected to handle a variety of products.
To begin, a sanitary process system may require that the same pump handle both viscous and thin products. A simple example c
Now that we know what BHP, VHP, and WHP are, we can better understand the efficiency of a pump as well as the total power requirements. The efficiency of a pump is the ratio of the WHP to the BHP or total horsepower consumed.
In pump sizing, vapor pressure is a key check in evaluating suction conditions and the net positive suction head available to the pump. In order to pump a fluid, we need to deliver fluid to the inlet of the pump.
Shear is defined as relative motion between adjacent layers of a moving fluid. When one layer of a fluid moves adjacently to another layer of fluid, it can begin to exhibit the deleterious effects of shear. Shear rate is defined as the measure of the extent or rate of relative motion between adjacent layers of a moving fluid. Therefore: