Keep critical chemical-transfer operations safe and running with sealed and sealless centrifugal pumps matched to your application and built for chemical compatibility, simpler installation, reliable containment, and lower lifecycle risk.
What is a centrifugal pump? How do most operate?
Centrifugal pumps are the standard choice for high-volume transfer and circulation of thin, low-viscosity liquids because they move liquid in a smooth, non-pulsating flow using a motor that spins an impeller continuously inside a casing. Liquid enters at the center of the impeller, and the spinning vanes throw it outward at high speed. The casing, called a volute, slows the liquid and converts that speed into pressure, which pushes it out the discharge port. Single-stage pumps use one impeller. Multi-stage pumps stack several impellers in series to build more pressure.
Centrifugal pumps are described by two separate design choices: inlet layout and shaft sealing. In an end-suction pump, liquid enters the front of the casing in line with the shaft and leaves through a discharge port on the side. Close-coupled versions mount directly to a standard motor, which removes the separate coupling and the coupling alignment that other pump and motor arrangements require. The motor must turn the impeller without letting liquid escape, and centrifugal pumps handle this through either mechanical seal or magnetic drive (sealless).
Pulsafeeder gives you both shaft sealing options in one centrifugal pump portfolio
With Pulsafeeder centrifugal pumps, you can match the pump to the chemical instead of compromising on a single design. Because we offer both, the choice starts with your chemical, your leak tolerance, and your maintenance capacity. We offer end-suction pumps with mechanical seals for acid, alkali, and solvent transfer, as well as magnetic-drive pumps with no shaft seals, protecting personnel from hazardous, corrosive, and toxic chemicals and eliminating seal replacement and seal flush systems. If your application falls outside the standard models, Pulsafeeder will modify or adapt its centrifugal pumps to severe or unusual service conditions, and every pump carries a 12-month warranty from date of shipment.
Choose by containment first, then by flow and pressure. EASTERN Centrichem pumps use mechanical seals. IsoChem pumps have no shaft seal. Compare the two lines below.
Continuous-duty transfer or circulation of corrosive liquids containing low percentages of solids. General industrial, process industry, pilot plant, and laboratory applications requiring mechanical-seal reliability with acids, alkalis, and solvents.
1.5 – 84 GPM depending on model (ECD1, ECC1, ECH1–ECH4 series)
Up to 297 feet of head (single- and multi-stage models); ECD1(20) rated to 175 PSIG
Close-coupled to standard NEMA 56C, 143/5TC, or 182/4C motor frames; no special base-plate mountings or couplings required. Explosion-proof motor option available (UL-approved for Class 1/2 hazardous locations) for flammable liquid or vapor applications.
CE
12 months from date of shipment from the factory
Hazardous, highly corrosive, explosive, or toxic chemical transfer where zero-leakage, sealless operation is required. Corrosion-resistant and caustic pump applications in industrial and laboratory settings.
Up to 84 GPM across the CMH1-CMH5 series
Up to 365 feet of head (five-stage CMH5)
No mechanical seal and no seal flush system. Alloy C containment can with forced product circulation for bearing lubrication and cooling. Power frame assembly available when NEMA C-flanged motors aren’t suitable.
CE; ATEX optional
12-months from date of shipment from the factory
Match the containment approach to your chemical, and get both options from one manufacturer.
EASTERN Centrichem single-stage and multi-stage end-suction pumps are mechanically sealed and close-coupled to standard NEMA motor frames. They are built for continuous-duty transfer and circulation of corrosive liquids in process industry, pilot plant, and laboratory service. Generous clearances let them handle liquids containing low percentages of solids, and 316 stainless steel or Alloy C construction suits a wide range of acids, alkalis, and solvents.
IsoChem sealless magnetic-drive pumps have no mechanical seal or packing, the main sources of leakage on conventional centrifugal pumps. A magnetic coupling transmits torque through an Alloy C containment can, which resists corrosion and limits heat rise. They are built for corrosion-resistant and caustic pump applications and for hazardous, explosive, and toxic chemicals in industrial and laboratory settings.
Pulsafeeder centrifugal pumps move corrosive, hazardous, and demanding liquids in continuous-duty transfer and circulation service, from laboratory benches to industrial process lines. Mechanically sealed end-suction pumps and sealless magnetic-drive pumps let you match the containment approach to your chemical and your industry.
Water Treatment
Transfer and circulation of treatment chemicals in water treatment systems, with mechanically sealed end-suction pumps for acids and alkalis.
General Industrial
Continuous-duty transfer of acids, alkalis, solvents, and other corrosive and caustic chemicals across industrial and process facilities, with sealless magnetic-drive pumps for hazardous, explosive, or toxic chemicals. Single- and multi-stage models up to 84 GPM.
Laboratory and Pilot Plant
Compact, close-coupled pumps for laboratory use and pilot plant operations, where high purity or corrosive service is needed.
Certification coverage varies by product line.
Pulsafeeder centrifugal pumps are available with motor, seal, and mounting options to match your application. Available options include:
Pulsafeeder will also modify or adapt its centrifugal pumps to severe or unusual service conditions.
A centrifugal pump spins an impeller to create continuous, non-pulsating flow, which suits transfer and circulation of thin liquids. Its flow changes with system pressure, so it moves chemicals but doesn’t meter them. A positive displacement pump, such as a diaphragm, peristaltic, or rotary gear pump, delivers a set volume with each stroke or rotation, which suits precise dosing. Use a centrifugal pump to transfer chemicals and a metering pump to dose them.
Choose a magnetic drive pump, also called a sealless pump, when leakage is not acceptable. IsoChem magnetic-drive pumps have no mechanical seal, so there is no seal to replace and no seal flush system. A mechanically sealed EASTERN Centrichem pump is a practical choice for acid, alkali, and solvent transfer where routine seal maintenance is acceptable.
IsoChem Centrifugal pumps are available with ATEX certification as an option. EASTERN Centrichem pumps can be ordered with an explosion-proof motor, UL-approved for Class 1 or 2 hazardous locations. Handling a hazardous chemical is different from operating in a hazardous location, so confirm your area classification with your Pulsafeeder representative before ordering.
