Additives

Positive displacement pumps are particularly well-suited for transferring additives due to their ability to handle a wide range of viscosities and maintain a consistent flow rate, even under varying pressure conditions. These pumps operate by trapping a fixed amount of fluid and displacing it through the pump's discharge, which ensures precise and accurate dosing of additives. This level of control is crucial when dealing with substances that require consistent and accurate quantities to ensure the desired chemical reaction or product quality.

Viking pumps are used for metering when required flow rates or pressures exceed those available from smaller diaphragm-type metering pumps. In continuous processes, additive pumps are commonly driven by a variable speed drive controlled by an input signal from a flowmeter on the line they are being metered into to provide flow in proportion to the flow of that liquid. For batch processes, additive pumps with standard motors are commonly turned on and off by batch controllers based on input signals either from flowmeters downstream of the pumps or from load cells on the tank they are discharging into.

Additives have a wide range of characteristics, some viscous, some thin; some highly lubricating, some abrasive. Most additives are fairly inert and compatible with iron pumps, though some like red dye for diesel may need stainless steel to maximize life. Some food additives or colorants may require hygienic pump designs for cleanability. Viking offers all of these options.

Viking In the Process

Fuel additives commonly handled by Viking pumps include oxygenates, antioxidants, stabilizers, antiknock additives and dyes, typically using magnetic drive spur gear pumps with explosion proof motors to meter into a gasoline or diesel stream at the refinery or terminal.

Lube oil additives include detergents, dispersants, antioxidants, anti-foam agents, and anti-wear additives. These are typically metered into blending tanks at lube oil plants using Viking internal gear pumps.

Polyurethane additives include catalysts, surfactants, blowing agents, chain extenders, cross-linkers and dyes. These are typically handled by Viking spur gear pumps to meter into a polyol and isocyanate stream at a foam plant.

Paint additives commonly include solvents, wetting agents, thickeners, anti-foaming agents, and biocides. They are typically metered into blending tanks at paint manufacturers using Viking internal gear pumps.

Viking also plays extensively in dosing additives across the chemical industry and the food and beverage industry, where they handle a very wide range of ingredients.