Liquified gases present many pumping difficulties including very low viscosity and lubricity, low specific gravity, low temperatures and require special sealing arrangements due to high inlet pressure. 

Positive displacement pumps, including close-clearance internal gear pumps and vane pumps are well suited to handling certain liquified gases due to their low NPSHr, low temperature metallurgy options, high pressure capabilities, resistance to vapor lock and many available sealing arrangements. 

Latex is the generic term for emulsions of polymer in water that is stable. These emulsions can be natural or synthetically made. This liquid is typically very shear-sensitive and requires care when pumping. 

Heat transfer fluids (HTF), also known as heat transfer oil (HTO) or hot oil, is used for transferring heat from a heater to an point of use such as chemical reactors or injection molding, as well as in food applications like bakeries.

Glycols are alcohols with unique properties, such as a high boiling point and good water solubility, that makes them attractive in many industries. Common examples include ethylene glycol, propylene glycol and polyethylene glycol. 

Filled asphalts contain particulate and are used to manufacture asphalt roofing. The filler material improves durability and fire resistance of the shingle. Pumping filled asphalt requires special construction and operation to minimize abrasion, prevent leakage and extend pump life. 

Cold ethanol extraction is a common method for extracting oils from plant materials. Due to its polarity, ethanol is chilled to subzero temperatures to avoid extracting additional, less desirable water-soluble molecules.

In this application biomass is placed in vessel and cold ethanol solvent is pumped in. The desired oils are rapidly dissolved in this solvent. Unlike hydrocarbon solvents, ethanol has no risk of leaving toxic residual chemicals in the product, which is especially important if for human consumption.

Positive displacement gear pumps are ideal for transferring dyes due to their ability to provide a consistent and precise flow rate, regardless of the system pressure. This advantage ensures that the dye is transferred smoothly and evenly, minimizing the risk of color inconsistencies in the final product. The design of gear pumps allows them to handle a wide range of viscosities, making them versatile when dealing with different dye formulations. Additionally, their robust construction ensures reliable operation with minimal maintenance, reducing downtime and operational costs.

Positive displacement gear pumps are ideal for transferring diesel #2 fuel oil due to their ability to handle viscous liquids with precision and efficiency. These pumps operate by trapping fluid between the gears and the casing, providing a consistent and predictable flow rate regardless of the changes in fluid pressure or viscosity. This makes them particularly well-suited for handling the thicker consistency of diesel #2 fuel oil, ensuring smooth and reliable transfer without cavitation or loss of prime.

Positive displacement pumps are ideal for transferring crude oils due to their ability to handle a wide range of viscosities and maintain a consistent flow rate regardless of pressure changes. These pumps move a fixed amount of fluid with each cycle, making them effective at pumping thick, viscous liquids like crude oil. Additionally, they can generate high pressures, making them suitable for transferring oil over long distances or through pipelines with varying elevations.

Positive displacement gear pumps are ideal for manufacturing medicinal creams due to their ability to handle high-viscosity fluids efficiently. They provide a consistent and precise flow rate, which is crucial for maintaining the quality and consistency of the creams. Additionally, these pumps offer gentle handling of shear-sensitive materials, minimizing the risk of altering the product's properties during the pumping process.