PML
Pneumatic Chute Magnet
Pneumatic Chute Magnet
Starting from Rs.48,192
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Product Details
At a Glance
A pneumatic chute magnet is a fully welded stainless steel housing that traps iron particles from dry, granular or free-flowing material moving through pressurised pneumatic conveying lines, where a standard open-flow grill can't be used. PML's pneumatic chute magnets are rated up to 12,000 Gauss and fit lines carrying flour, sugar, starch and pharmaceutical powders in either flow direction.
Pneumatically conveyed lines move product too fast and under too much pressure for a standard open-flow grill. The PML Pneumatic Chute Magnet is purpose-built for this environment — a fully welded stainless steel housing that traps iron particles from dry, granular or free-flowing material inside pressurised pneumatic lines running up to 1 bar and air speeds up to 25 m/s.
Built for Pressurised Lines
The special housing design lets product pass through in either direction, so it fits naturally into existing pneumatic conveying runs without disrupting flow. It's especially suited to food and pharmaceutical lines — flour, sugar, starch, pharmaceutical powders and granules — where a food-grade finish and gasket are standard, and various flange options let it match your existing line hardware.
Standard Range — 12,000 Gauss
| Model No. | Inlet A (mm) | B / C (mm) | Height (mm) | Rods | Rated Pressure |
| P001 | 75 | 180 | 460 | 4 | 1 bar |
| P002 | 100 | 180 | 460 | 4 | 1 bar |
| P003 | 125 | 180 | 460 | 4 | 1 bar |
The silicone seal system on the housing is rated for leak resistance up to 2 bar, giving margin above the standard 1 bar operating rating.
Key Advantages
- Rated for Pressurised Lines
Built and sealed for pneumatic conveying up to 1 bar, with a 2 bar leak-resistant silicone seal for margin.
- No Line Pressure Drop
The housing geometry maintains conveying performance instead of restricting flow.
- Tool-Free Guard Removal
Quick access for inspection and cleaning without needing tools.
- Vertical or Horizontal Installation
Fits into your existing pneumatic line layout either way.
Where It's Used
Plastic, food, chemical and pharmaceutical industries running pneumatic conveying lines — particularly flour, sugar, starch and pharmaceutical powder/granule handling where food-grade finish and gasket standards matter.
Frequently Asked Questions
What line pressure can it handle?
Standard units are rated to 1 bar operating pressure, with a silicone seal system that's leak-resistant up to 2 bar.
Will it slow down my conveying line?
No — the housing is designed to avoid line pressure drop, so conveying performance is maintained.
Is it suitable for food-grade lines?
Yes — food-grade finish and gaskets are standard, making it suitable for flour, sugar, starch and similar food and pharmaceutical products.
What air speed can the line run at?
Up to 25 m/s, in pneumatic lines running up to 1 bar.
Can it be installed in either flow direction?
Yes — the housing design lets product pass through in either direction, so it fits into existing pneumatic runs without disrupting flow.
Why Buy From PML
- 65+ years of magnetic separation engineering — pressurised-line separators built for food and pharmaceutical pneumatic conveying.
- Made and tested in-house — every unit is manufactured and checked to its stated Gauss rating and pressure seal.
- 12,000 Gauss capture — among the highest-intensity ratings in our chute range.
- Magnetic calibration and audit services available to verify field strength over time.
Need a custom flange or higher pressure rating? Enquire now and our engineering team will size the right unit for your pneumatic line.
Why Magnetic Strength Drops in Ferrous Separators (and When to Replace)
Separation efficiency falls as magnetic strength decreases. Below are the most common causes of reduced field strength in NdFeB (neodymium) magnetic separation equipment, along with the warning signs that indicate a magnet or separator needs replacing.
Causes of Reduced Magnetic Strength
- Thermal demagnetization: Standard Neodymium-Iron-Boron (NdFeB) grades lose magnetic strength when exposed to temperatures above their rating — often starting at 80°C / 176°F for standard grades. Exceeding these limits causes a permanent loss of magnetic flux.
- Corrosion and core oxidation: NdFeB is highly iron-rich and oxidizes quickly. If moisture, washdown liquids, or corrosive chemicals breach the outer stainless steel cladding, the magnet swells, crumbles, and loses field strength.
- Mechanical damage and internal cracking: NdFeB is brittle. Dropping magnetic tubes during cleaning, or subjecting them to heavy equipment vibration, causes internal micro-fractures that break the continuous magnetic circuit.
- Strong opposing magnetic fields: A sufficiently strong opposing field can overcome a material's coercivity and flip or randomize its magnetic domain polarity. High alternating current (AC) electric fields, in particular, create powerful local alternating magnetic fields that rapidly scramble domain alignment.
- Material buildup ("air gap" effect): Accumulated fine iron on the surface acts as a barrier, pushing the active magnetic field further away from incoming material. Because magnetic force decays exponentially with distance, even a few millimetres of buildup severely reduces capture rates.
- Increased process velocity or burden depth: Running material too fast, or in overly thick layers, prevents fine ferrous particles from spending enough time in the peak magnetic field zone to be pulled out of the flow.
Signs an NdFeB Magnet or Separator Needs Replacing
- Drop in gauss rating: Annual or semi-annual gauss testing shows a permanent drop of 10–15% or more from the baseline specification.
- Bulging or "pillow" swelling: The protective stainless steel tube cladding looks warped, swollen, or cracked — a sign of internal oxidation where rust has expanded inside the shell.
- Dead spots along the field: Measuring with a gauss meter reveals localised spots with zero or drastically lower magnetic pull across the grid or tube surface.
- Downstream metal contamination: Ferrous fines or tramp iron start showing up in final product testing or downstream machinery detectors despite the separator being clean.
- Structural casing punctures: Scratches, gouges, or pinhole leaks in the stainless steel jacket expose the internal magnetic circuit to moisture and process fluids.
Regular gauss testing (at least annually) is the most reliable way to catch strength loss before it affects downstream product purity — PML's own range of Gaussmeters and magnetic field meters covers this. If you're seeing any of the signs above, talk to our team about testing or replacing your separator.
