Magnetic Pumps

Magnetic drive pumps, also known as mag-drive or sealless pumps, use a magnetic coupling to transfer power from the motor to the impeller.
An outer magnet connected to the motor rotates an inner magnet inside the pump without any physical shaft penetrating the casing.
This design completely eliminates mechanical seals, making these pumps ideal for handling corrosive, toxic, hazardous, or high-purity fluids.

They are most commonly built as centrifugal pumps. The pumped fluid itself typically lubricates and cools the internal bearings.
Magnetic drive pumps provide leak-free, reliable operation with very low maintenance.
Industries use them widely where safety, zero leakage, and chemical compatibility are critical.

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Description

The 10″x20″ Brazed Plate Heat Exchanger (BPHE) offers compact, high-efficiency liquid-to-liquid heat transfer.
Engineers stack multiple corrugated 316L stainless steel plates and join them permanently through vacuum brazing.
The chevron pattern on each plate creates strong turbulence.
This design boosts heat transfer rates and keeps pressure drops low.
As a result, these units outperform traditional shell-and-tube exchangers in many applications.

The gasket-free brazed construction eliminates leak risks.
It also resists vibration and thermal shock effectively.
These exchangers handle pressures up to 450 psi and temperatures from –256°F to +437°F.
Their small size (about 9.8″ wide by 20.3″ long) fits tight spaces easily.
Low internal volume allows fast thermal response and reduces fluid needs.

Key Features

Feature	Benefit
Chevron Plate Pattern	Creates high turbulence for superior heat transfer
Gasket-Free Brazed Design	Eliminates leaks and reduces maintenance
Compact Footprint	Fits tight spaces and lowers installation costs
High Pressure & Temperature Rating	Handles demanding industrial and HVAC conditions

Materials

Component	Standard Material	Alternative Options	Best For
Plates	316L Stainless Steel	Higher-grade SS or Titanium	Corrosive fluids, seawater
Brazing	Copper (99.9% pure)	Nickel	Aggressive chemicals, ammonia, high chlorides
Connections	316L Stainless Steel	Custom alloys	High-corrosion environments

Proper filtration and fluid treatment keep these units performing well for many years.
Overall, 10″x20″ BPHEs combine high performance, reliability, and versatility in one compact package.

Additional information

Flow Rates (GPM)	0-15, 0-30, 0-50, 0-80, 0-300, 0-800
Connection Sizes	1/2", 1", 2", 3", 4", 6"
Connection Ends	FNPT Threaded, RF150 Flanged, Tri-Clamp

Specifications

Parameter	Typical Specifications
Pump Type	Sealless magnetic drive centrifugal (most common); some gear or vane designs available
Wetted Materials	316 Stainless Steel, Hastelloy C, Titanium, PVDF, PP, ETFE, PFA, or Ceramic
Magnet Materials	Neodymium (NdFeB) or Samarium-Cobalt (SmCo) rare-earth magnets
Flow Rate Range	0.5 GPM to over 500 GPM (model dependent)
Head / Pressure	Up to 400+ ft (120+ m) or 150+ psi
Temperature Range	-100°F to +500°F (-73°C to +260°C) depending on materials
Viscosity Limit	Up to 200–500 cP (higher with special designs)
Solids Handling	Generally clean fluids; some models handle up to 5–10% light slurries
Motor Power	0.25 HP to 75+ HP (fractional to large industrial motors)
Containment Shell	316 SS, Hastelloy, or reinforced polymer — pressure-rated barrier
Bearings	Silicon Carbide, Carbon, or PTFE — fluid-lubricated

Installation

Step	Installation Procedure
Location Selection	Choose a clean, well-ventilated area with easy access for maintenance. Keep the pump close to the suction source to minimize NPSH requirements. Ensure a firm, level foundation that can handle vibration.
Alignment & Mounting	Mount the pump and motor on a common baseplate. Align the motor shaft precisely with the pump using a laser or dial indicator. Secure all mounting bolts firmly.
Piping Installation	Install suction and discharge piping with proper supports to avoid pipe strain. Use flexible connections if needed. Keep suction line short, straight, and one size larger than the pump inlet. Install a strainer on the suction side.
Electrical Connection	Connect the motor according to the wiring diagram. Verify correct rotation direction (usually clockwise when viewed from the motor end). Install proper overload protection and grounding.
Priming & Filling	Fill the pump casing and suction line completely with the process fluid. Remove all air from the system. Magnetic pumps must never run dry.
Startup & Testing	Start the pump at low flow if possible. Check for unusual noise, vibration, or overheating. Monitor suction and discharge pressures. Gradually increase to design flow. Verify no leaks and stable operation.
Safety Checks	Install pressure relief valves, temperature sensors, and dry-run protection if available. Confirm all guards and safety devices are in place before full operation.

Maintenance

Step	Installation Procedure
Location Selection	Choose a clean, well-ventilated area with easy access for maintenance. Keep the pump close to the suction source to minimize NPSH requirements. Ensure a firm, level foundation that can handle vibration.
Alignment & Mounting	Mount the pump and motor on a common baseplate. Align the motor shaft precisely with the pump using a laser or dial indicator. Secure all mounting bolts firmly.
Piping Installation	Install suction and discharge piping with proper supports to avoid pipe strain. Use flexible connections if needed. Keep suction line short, straight, and one size larger than the pump inlet. Install a strainer on the suction side.
Electrical Connection	Connect the motor according to the wiring diagram. Verify correct rotation direction (usually clockwise when viewed from the motor end). Install proper overload protection and grounding.
Priming & Filling	Fill the pump casing and suction line completely with the process fluid. Remove all air from the system. Magnetic pumps must never run dry.
Startup & Testing	Start the pump at low flow if possible. Check for unusual noise, vibration, or overheating. Monitor suction and discharge pressures. Gradually increase to design flow. Verify no leaks and stable operation.
Safety Checks	Install pressure relief valves, temperature sensors, and dry-run protection if available. Confirm all guards and safety devices are in place before full operation.

Q&A

Question	Answer
How does a magnetic pump work?	The motor spins an outer magnet. This creates a magnetic field that passes through a containment shell and drives an inner magnet attached to the impeller. The impeller then moves the fluid using centrifugal force — all without any physical shaft or seal.
Why are magnetic pumps called sealless?	There is no mechanical seal or shaft penetration through the pump casing. The containment shell completely isolates the pumped fluid from the atmosphere, eliminating leak paths.
Can magnetic pumps run dry?	No. Most models rely on the pumped fluid to lubricate and cool the internal bearings. Running dry can cause rapid overheating and damage the bearings or magnets.
What fluids are magnetic pumps best for?	They excel with corrosive, toxic, hazardous, expensive, or high-purity liquids such as acids, solvents, chlorine, and pharmaceutical ingredients.
What is decoupling?	If the impeller becomes stuck or overloaded, the magnetic coupling can slip (decouple). The motor continues running but the impeller stops. This protects the motor from damage.
Do magnetic pumps require special maintenance?	They need very little routine maintenance. Focus on keeping the fluid clean, checking bearings periodically, and monitoring temperature and vibration.
Are magnetic pumps more expensive?	Yes, they usually cost more upfront than sealed pumps. However, lower maintenance, no seal replacements, and reduced spill risk often make them more economical over time.

Advantages / Disadvantages

Question	Answer
How does a magnetic pump work?	The motor spins an outer magnet. This creates a magnetic field that passes through a containment shell and drives an inner magnet attached to the impeller. The impeller then moves the fluid using centrifugal force — all without any physical shaft or seal.
Why are magnetic pumps called sealless?	There is no mechanical seal or shaft penetration through the pump casing. The containment shell completely isolates the pumped fluid from the atmosphere, eliminating leak paths.
Can magnetic pumps run dry?	No. Most models rely on the pumped fluid to lubricate and cool the internal bearings. Running dry can cause rapid overheating and damage the bearings or magnets.
What fluids are magnetic pumps best for?	They excel with corrosive, toxic, hazardous, expensive, or high-purity liquids such as acids, solvents, chlorine, and pharmaceutical ingredients.
What is decoupling?	If the impeller becomes stuck or overloaded, the magnetic coupling can slip (decouple). The motor continues running but the impeller stops. This protects the motor from damage.
Do magnetic pumps require special maintenance?	They need very little routine maintenance. Focus on keeping the fluid clean, checking bearings periodically, and monitoring temperature and vibration.
Are magnetic pumps more expensive?	Yes, they usually cost more upfront than sealed pumps. However, lower maintenance, no seal replacements, and reduced spill risk often make them more economical over time.

Applications

Industry	Common Applications
Chemical Processing	Transfer of acids, alkalis, solvents, and reactive chemicals. Ideal for reactor feeding, unloading, and circulation of hazardous liquids.
Pharmaceutical & Biotech	High-purity fluid transfer, sterile processes, CIP systems, and handling of active pharmaceutical ingredients without contamination risk.
Water Treatment	Dosing and transfer of sodium hypochlorite, ferric chloride, sulfuric acid, and other treatment chemicals.
Petrochemical & Refining	Handling hydrocarbons, fuels, coolants, and aggressive process liquids in refineries and chemical plants.
Metal Finishing & Plating	Circulation of acidic plating baths, pickling solutions, and etching chemicals.
Power Generation & Utilities	Condensate, boiler feed, and chemical dosing in power plants where zero leakage is critical.
Food & Beverage (Special Models)	Transfer of hygienic or corrosive cleaning solutions and certain food-grade liquids with appropriate material selection.

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