PRIMUS Magnetic Drive Pumps — Sealless Zero-Leakage Mag Drive | BTA

PRIMUS pump range Magnetic Drive Pumps Sealless magnetic drive pumps — torque passes through a sealed containment shell, so there is no mechanical seal to wear, replace or leak. 18 models from 40W to 3700W in 220V single-phase and 380V three-phase. 18models 40W–3700Wpower range 900 L/minmax flow 29 mmax head Zeroseal leakage No mechanical seal Sealless mag drive — nothing to leak, nothing to replace 220V cable & plug 380V three-phase ✓ Sealless design ✓ Zero leakage ✓ PP / GFRPP chemical-resistant ✓ S1 continuous duty ✓ 220V & 380V options PRIMUS magnetic drive pumps use magnetic coupling to transmit motor torque through a sealed containment shell. The impeller shaft is fully enclosed — there is no mechanical seal to wear, no seal replacement schedule and no leakage path to the motor or environment. PP and GFRPP chemical-resistant construction suits aquaculture, hydroponics, water treatment and industrial recirculation, with BSP threaded and flanged connections across the range. The PRIMUS difference No seal. No leaks. 🛡️ Sealless design No mechanical seal means nothing to wear or leak. The impeller shaft is fully enclosed inside a sealed containment shell — no seal replacement, no seal leakage, no contamination path. 🧲 Magnetic coupling Magnets transmit torque through the shell wall. The outer drive ring on the motor turns the inner impeller ring through the sealed barrier — zero physical contact, zero wear path. 📐 Versatile range 6 single-phase and 12 three-phase models cover 35–900 L/min and heads to 29 m, with threaded connections on smaller models and flanges on industrial sizes. What you get Built for duty Zero leakage Sealed containment shell isolates the fluid completely from the motor and the environment. Chemical resistance PP and GFRPP wetted parts handle salts, mild acids and a wide range of chemicals. Quiet operation No seal friction — magnetic coupling runs smoother with less vibration. Continuous duty Rated S1 for 24/7 operation in recirculation and life-support systems. Compact design Close-coupled monoblock — no couplings, no alignment, no baseplate. Easy maintenance No seal servicing ever — the impeller is the only part to inspect. Wide flow range 35 to 900 L/min across 18 models — one range from small recirc to industrial flow. Two connection families BSP threaded and flanged options matched to model size. Choose your model Specification table PRIMUS magnetic drive pump specifications — 18 models Model Supplier code Power Voltage Rated flow Rated head Inlet Outlet PMD-35 MP-30 40W 220V/50Hz 35 L/min 4 m DN25 BSP DN25 BSP PMD-40 MP-40 60W 220V/50Hz 43 L/min 4.6 m DN25 BSP DN25 BSP PMD-70 MP-55 90W 220V/50Hz 74 L/min 5.6 m DN32 BSP DN32 BSP PMD-85 MP-70 180W 220V/50Hz 85 L/min 6.7 m DN32 BSP DN32 BSP PMD-100 MP-100 260W 220V/50Hz 100 L/min 11 m DN40 BSP DN40 BSP PMD-220 MP-120 370W 220V/50Hz 220 L/min 10.5 m DN50 BSP DN50 BSP PMD3-130 MPH-122H 370W 380V/50Hz 130 L/min 13 m DN50 BSP DN50 BSP PMD3-160 MPH-144 370W 380V/50Hz 160 L/min 15 m DN50 BSP DN50 BSP PMD3-240 MPH-344 550W 380V/50Hz 240 L/min 15 m DN65 BSP DN65 BSP PMD3-350 MPH-444 750W 380V/50Hz 350 L/min 17 m DN65 BSP DN65 BSP PMD3-400 MPH-554 1500W 380V/50Hz 400 L/min 23 m DN80 flange DN80 flange PMD3-615 MPH-565L 1500W 380V/50Hz 615 L/min 18 m DN80 flange DN80 flange PMD3-500 MPH-654 2200W 380V/50Hz 500 L/min 25 m DN80 flange DN80 flange PMD3-760 MPH-665 2200W 380V/50Hz 760 L/min 18 m DN80 flange DN80 flange PMD3-500HD MPH-754 3000W 380V/50Hz 500 L/min 28 m DN100 flange DN100 flange PMD3-750HD MPH-765 3000W 380V/50Hz 750 L/min 22 m DN100 flange DN100 flange PMD3-600HD MPH-854 3700W 380V/50Hz 600 L/min 29 m DN100 flange DN100 flange PMD3-900HD MPH-865 3700W 380V/50Hz 900 L/min 26 m DN100 flange DN100 flange Dimensions Model Supplier code L mm* W mm* H mm* Weight kg* Inlet Outlet PMD-35 MP-30 180 120 130 2.5 DN25 BSP DN25 BSP PMD-40 MP-40 180 120 130 2.8 DN25 BSP DN25 BSP PMD-70 MP-55 200 130 140 3.5 DN32 BSP DN32 BSP PMD-85 MP-70 200 130 140 3.8 DN32 BSP DN32 BSP PMD-100 MP-100 230 150 160 5.2 DN40 BSP DN40 BSP PMD-220 MP-120 260 170 180 7.5 DN50 BSP DN50 BSP PMD3-130 MPH-122H 280 180 190 9.0 DN50 BSP DN50 BSP PMD3-160 MPH-144 280 180 190 9.5 DN50 BSP DN50 BSP PMD3-240 MPH-344 310 200 210 12.0 DN65 BSP DN65 BSP PMD3-350 MPH-444 340 220 230 15.0 DN65 BSP DN65 BSP PMD3-400 MPH-554 380 250 260 20.0 DN80 flange DN80 flange PMD3-615 MPH-565L 380 250 260 22.0 DN80 flange DN80 flange PMD3-500 MPH-654 400 270 280 25.0 DN80 flange DN80 flange PMD3-760 MPH-665 400 270 280 27.0 DN80 flange DN80 flange PMD3-500HD MPH-754 420 280 290 30.0 DN100 flange DN100 flange PMD3-750HD MPH-765 420 280 290 32.0 DN100 flange DN100 flange PMD3-600HD MPH-854 440 300 310 35.0 DN100 flange DN100 flange PMD3-900HD MPH-865 440 300 310 38.0 DN100 flange DN100 flange * Dimensions estimated — verify with supplier drawings before installation. Performance curves Flow curve charts 220V / 50Hz — single-phase models 380V / 50Hz — three-phase models Chart labels use the same model codes as the tables above — match each curve directly to its row. (T) suffix denotes the three-phase variant of that frame. Connections / options Configuration options BSP threaded DN25 · DN32 · DN40 · DN50 · DN65 Flanged DN80 · DN100 Voltage 220V/50Hz single-phase (cable & plug) · 380V/50Hz three-phase (unwired) HD heavy-duty series PMD3-500HD → PMD3-900HD — heads to 29 m, DN100 flanges Complementary products Complete your system 🔧 Plumbing fittings Threaded adapters, unions, valves and hose tails to connect from pump to pipe. View plumbing fittings 💨 Aeration systems Air pumps and diffusers to pair circulation with dissolved-oxygen management. View aeration range 🫧 Nanobubble nozzles PRIMUS flow and pressure runs nanobubble nozzles for advanced gas-transfer duty. View nanobubble nozzles What's included In the box 📦 Pump unit Complete magnetic drive pump with impeller and coupling assembly — arrives as one integrated unit, no assembly required. 🔌 Cable & plug 220V models ship with cable and plug fitted. 380V models are unwired for hardwire connection by a qualified electrician. 📄 Instruction manual Installation, operation and maintenance guide covering priming, pipe sizing and impeller inspection. Upgrade options Take it to the next level ⬆️ Scale up flow Step up as the system grows — single-phase PMD-35 → PMD-220, three-phase PMD3-130 → PMD3-760 — each step adds flow and head. 💪 HD heavy-duty PMD3-500HD through PMD3-900HD deliver heads up to 29 m with DN100 flanged connections for high static-head industrial installs. ⚡ Three-phase power 380V motors run cooler and deliver more torque per watt — the efficient choice for continuous commercial duty. Need a custom configuration? We can help match flow rate, head pressure and fluid compatibility to the right model. Contact us FAQ Frequently asked questions What is a magnetic drive pump? A mag drive pump uses magnetic coupling to transmit torque from the motor to the impeller through a sealed containment shell. No mechanical seal means zero leakage — the fluid never contacts the motor. 220V vs 380V — which do I need? 220V single-phase models (PMD-35 to PMD-220) plug into a standard outlet — ideal for smaller systems. 380V three-phase models (PMD3-130 to PMD3-900HD) need a three-phase supply and are wired on-site — suited to commercial installations. BSP thread vs flange connections? Models up to DN65 use BSP female thread for easy plumbing integration. DN80 and DN100 models use flange connections for secure industrial pipe mating. Can PRIMUS mag drive pumps run dry? No. The pump must be primed before operation — running dry can damage the impeller and magnetic coupling. Always ensure the pump is flooded before starting. Are these suitable for continuous duty? Yes. All PRIMUS mag drive pumps are rated S1 continuous duty — designed to run 24/7 without interruption. What about chemical compatibility? Smaller models use PP (polypropylene); larger models use GFRPP (glass-filled polypropylene). Both handle a wide range of chemicals, salts and mild acids — check compatibility with your specific fluid before ordering. What warranty do PRIMUS pumps come with? Contact BTA Aqua for current warranty terms. We back every pump we sell with local support and spare parts availability. Not sure which model you need? With 18 models across two voltage ranges, we'll help you match flow rate, head pressure and connection type to your system. Get in touch Browse all products Trade & wholesale Bulk pricing for commercial aquaculture operations, installers and resellers. Apply for a trade account for exclusive pricing and priority support. Apply for trade account