Positive displacement pumps are typically used for pumping viscous liquids and are ideal for long runs with continuous flow. These pumps typically do not produce high flow rates, but can produce higher pressures than other pump types. The flow in a positive displacement pump won't change when the pressure increases. We offer the widest selection of positive displacement pumps in the industry. When selecting the right pump for your application, consider fluid viscosity, temperature, installation requirements, and chemical compatibility.