Magnetic drive pumps are capable of pumping a variety of liquids
Magnetic Drive pumps are sealless pumps that use a coaxial
magnetic coupling to transmit torque to an impeller. A standard electric motor
drives a set of permanent magnets that are mounted on a carrier or drive
assembly. In turn, the magnets drive the inner rotor and provide the no-slip or
synchronous capability of the torque coupling. There are two basic types of
magnetic drive pumps: rotating driven shaft and stationary shaft. Rotating shaft
magnetic drive pumps are usually made of metal and include a pressurized
recirculation circuit to help prevent vaporization of the liquid required to
lubricate the bearings. Stationary shaft magnetic drive pumps typically use
non-metallic components such as ceramics and plastics and are best suited for
light to medium duty applications.
Magnetic drive pumps are capable of
pumping a variety of liquids. Some devices are designed to move abrasive
materials, acids, adhesives, chemicals, concrete and grout, coolants, hazardous
materials, liquid metal, or lubricants. Other devices are rated for combustible,
corrosive, high viscosity, or high temperature media. Magnetic drive pumps are
also used to move gasoline, diesel fuel, and oil; ground water, potable water,
salt water, and wastewater; sewage, sludge, slurry and ash slurry; gas and air;
powders, solids, and rendering wastes; and a variety of liquids and liquids with
solids. Important specifications for magnetic drive pumps include maximum
discharge flow, maximum discharge pressure, inlet size, discharge size, and
media temperature. Power sources include compressed air, gasoline, diesel fuel,
solar energy, alternating current (AC), and direct current (DC). Small
DC-powered magnetic drive pumps operate on 6, 12, 24, or 32 volts. Single-phase
motors require 100, 115, 200, or 230 volts. Three phase motors run at voltages
that range from 230 VDC to 460 VDC, and from 480 VDC to 690 VDC. Pumps that do
not include a power source typically provide a drive shaft for connection to a
motor.
Manually powered pumps rely upon hand or foot power.Magnetic drive
pumps are used in a variety of commercial, industrial, municipal, and maritime
applications. Examples include agriculture and horticulture, dairy farms,
breweries and distilleries, construction, flood control, food service and food
processing, power generation, and oil and gas production. Magnetic drive pumps
are also used in the aerospace and defense, automotive, machine tool, mining,
medical, pharmaceutical, semiconductor, and paper industries. Devices for
heating, ventilation and air conditioning (HVAC) systems are also available.
Cryogenic pumps are rated for conditions where temperatures are low enough for
gases to condense to become liquids or solids. Petrochemical and hydrocarbon
pumps are rated for materials such as gasoline, kerosene, diesel oil,
lubricating oil, paraffin wax, and asphalt.
Pneumatic and electric diaphragm pumps
2012-04-28
