Chemical-Resistant Pumps

What is a chemical resistant pump?

Chemical resistant pumps move mild acidic fluids, chemicals and other corrosive liquids through piping systems. These pumps are available in a variety of housing materials, voltages & horsepower ratings for both agricultural and industrial purposes. Chemical resistant pumps can handle chemicals, chemical slurries & substances with varying levels of viscosity, corrosiveness and abrasiveness.
Chemical dosing pumps are positive displacement pumps that inject a precise dose of chemicals into water, gas or steam. They are typically part of a chemical feed system that comprises a pump (or multiple pumps), a storage tank, pipes and a control panel. There are different methods and types of pumps that can be used, but the general procedure is to draw a preset amount of chemical into a holding container and then inject it into a pipe or tank that holds water or other material to be dosed.
Chemical resistant pumps are ideal for handling a variety of liquids and are suitable for most continuous-duty & high-flow applications in the plumbing, electronics, water treatment and construction industries. Raptor Supplies offers a wide range of these pumps from brands like Dayton, Laing Thermotechand Little Giant. Daytonchemical resistant centrifugal pumps are designed for irrigation, spraying systems, transfer of non-flammable liquids and applications where no suction lift is required. These centrifugal pumps come equipped with a water seal flush port for the decontamination of chemicals on the seal & seat elastomers. All models feature thermal protection to prevent overheating and operate only after cooling down. Centrifugal pumps from Little Giantfeature a single-phase, square flange motor that can operate at speeds up to 3600 rpm, with thermal overload protection for safe operation. These centrifugal pumps come equipped with a glass-filled thermoplastic impeller for increased efficiency and ports providing proper air bleeding to prevent frost damage. These chemical resistant pumps feature a large drain hole and shaft flinger in an adapter bracket to prevent moisture from damaging bearings.

Chemical resistant pumps can be used in chemical & petrochemical plants, pharmaceutical plants, food & beverage industries, refineries, gas & power plants, water treatment facilities, tank farms, heating & refrigeration systems, etc. They can transfer a host of materials, including hydrochloric acid, sulfuric acid, benzene, nitric acid, hydrofluoric acid, chlorine, bromine, hydrocarbons, aggressive & explosive chemicals, halogenated solutions, high purity chemicals, salt water, waste water, noxious liquids, caustics, heat transfer fluids, ethylene glycol, propylene glycol and recovery solvents.

• Chemical resistant pumps move fluids through a system by using circular pump casing with one or more impellers. Impellers create flow by turning either axially, radially or a mixture of these two.
• Axial flow pumps lift liquid against the shaft of the impeller, essentially like a propeller on a boat. The propelling action of the impeller vanes generates pressure. These pumps are flow dependent, exhibiting low pressure and high flow. In axial flow pumps, the liquid is accelerated through the impeller centre and out along the impeller blades at right angles (radially) to the shaft of the pump. The pump develops pressure entirely through centrifugal force.
• Pumps with mixed flow push liquid at an angle greater than 90 degrees, away from the shaft. The impeller creates pressure partly because of centrifugal force and partly because of lifting action. Using medium flow and medium pressure, mixed flow pumps combine the benefits of axial and radial flow pumps.

Chemical resistant pumps must meet or ASME, ANSI, API or NACE standards before they can be used for boiler, pressure vessel, oil & gas refinery, nuclear or other mission critical applications.