Pumping Systems

Details

Process centrifugal pumps provide continuous transfer and circulation of compatible industrial liquids. Metallic, non-metallic and lined constructions can be considered according to the fluid, temperature and corrosion conditions. Magnetic-drive options avoid a conventional rotating shaft seal, but their suitability still depends on the medium and operating limits. Selection requires the actual duty point, suction conditions, viscosity and solids content rather than pipe size alone. Supply enquiries can include a pump, matched motor and specified accessories, or replacement wet-end components for an identified model. General building water-transfer and booster pumps remain covered in the existing Plumbing category.

For selection: Liquid composition and concentration; Required flow and differential head; Suction conditions and NPSH available; Temperature and viscosity; Solids content; Power and area classification

Details

Air-operated double-diaphragm pumps transfer liquids using a compressed-air-driven reciprocating action. Metallic and non-metallic wetted constructions, combined with suitable diaphragm and valve materials, support a range of industrial transfer duties. Typical enquiries include chemicals, coatings and liquids containing solids, subject to the selected pump’s limits. The required flow must be considered alongside discharge pressure, suction conditions and available compressed-air capacity. Output is pulsating, so a compatible dampener may be useful for the application. Replacement diaphragms, balls, seats and air-distribution components must match the exact pump configuration. Hazardous-area suitability requires model-specific verification.

For selection: Fluid and chemical concentration; Viscosity and solids size; Required flow and discharge pressure; Available air pressure and capacity; Suction conditions; Area classification and material requirements

Details

Positive-displacement pumps move a defined volume through the pumping mechanism and can suit duties involving viscous fluids or controlled transfer. Progressive-cavity designs use a rotor and stator to move liquid through successive cavities; suitable configurations can handle selected slurries, pastes and shear-sensitive products. Rotary gear or screw pumps provide other options for compatible liquids and lubrication duties. Technology selection depends on viscosity, solids, temperature and the required pressure differential. Feed-hopper arrangements may be considered for difficult-flowing products. Supply specifications should include appropriate pressure protection and drive requirements, with replacement rotors, stators, gears or seals matched to the OEM model.

For selection: Viscosity across the temperature range; Solids and shear sensitivity; Flow and differential pressure; Suction or feed conditions; Duty cycle; Materials and sealing requirements

Details

Peristaltic pumps move fluid by progressively compressing a flexible hose or tube. This arrangement can suit chemical dosing, slurry transfer and selected shear-sensitive liquids, with the hose or tube chosen for the specific medium. Compact tube pumps and larger industrial hose pumps serve different flow, pressure and duty requirements. The operating speed, suction arrangement and fluid characteristics influence selection and wear-part life. Enquiries should include the intended operating schedule and any need for reversible flow or external control. Replacement hoses, tubing and compatible lubricants are model-specific; published family limits do not imply that every combination is suitable.

For selection: Fluid composition and abrasiveness; Flow and discharge pressure; Suction conditions; Temperature; Continuous or intermittent duty; Control and tubing compatibility

Details

Metering pumps deliver controlled quantities of chemicals or additives into a process. Solenoid-driven and motor-driven diaphragm designs offer different capacities and control arrangements, while the liquid-end and seal materials must suit the chemical concentration and temperature. Selection starts with the minimum and maximum dosing rate, required discharge pressure and control signal. The arrangement may need suction assemblies, injection valves, back-pressure valves or pulsation control to suit the defined duty. Supply can cover individual pumps and specified components, with remote coordination of OEM data. General treatment outcomes and dosing accuracy should only be stated when supported by the selected equipment specification.

For selection: Chemical and concentration; Minimum and maximum dosing rate; Back pressure; Temperature and degassing tendency; Available control signals; Liquid-end and seal materials