PML
Self Cleaning Magnetic Grill
Self Cleaning Magnetic Grill
Starting from Rs.145,000
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Product Details
At a Glance
A self cleaning magnetic grill automates the cleaning cycle of a standard magnetic grill with pneumatic cylinders and a timer, clearing captured contamination at the push of a button instead of a manual slide-and-drop action. PML's self cleaning grills are rated to 11,000 Gauss, fine enough to capture particles down to 1 micron, for continuous operation up to 80°C.
Our Easy Clean grills cut cleaning down to a manual slide-and-drop action. The PML Self Cleaning Magnetic Grill goes a step further and automates it entirely: pneumatic cylinders, an FRL unit and a timer with an operating button drive the whole cleaning cycle at the push of a button — or on an automatic schedule — with no drawer to pull out by hand.
How the Cleaning Cycle Works
The grill is built on the same stainless-steel, high-intensity rare-earth (NdFeB) magnetic rod platform as our standard grills, rated to 11,000 Gauss for particles as fine as 1 micron. What's different is how it's cleaned:
- Start
Actuate the solenoid — manually or electrically — and the pneumatic cylinders retract, pulling the magnetic tubes back through a stripper assembly that deposits the collected tramp iron outside the product flow area.
- Finish
The cylinders return to the run position, pushing the magnetic tubes back into the housing, ready to resume separation.
The whole cycle runs on a timer with a manual operating button, so cleaning can be triggered on demand or scheduled automatically — no line stoppage, no drawer to remove.
Standard Range — Single Stage Self Cleaning Grill
| Model No. | Inlet/Outlet Dia. (mm) | Total Height (mm) | Magnetic Elements |
| SCG1 | 100 | 300 | 3 |
| SCG2 | 150 | 300 | 4 |
| SCG3 | 200 | 300 | 5 |
Larger diameters and multi-stage configurations are available — tell us your duct size and cleaning-cycle requirements and we'll size the right unit.
Key Advantages
- Fully Automated Cleaning
Pneumatic cylinders and a timer handle the cleaning cycle — no drawer to remove, no manual scraping.
- Push-Button or Scheduled
Trigger cleaning on demand, or let the timer run it automatically at set intervals.
- High-Intensity Capture
11,000 Gauss NdFeB elements catch particles down to 1 micron.
- Minimal Downtime
The cleaning cycle runs in place, without needing to stop and disassemble the unit.
Where It's Used
Dry, granular or free-flowing materials in food, pharmaceutical, chemical and similar processing lines where contamination is frequent enough that manual drawer cleaning becomes a bottleneck.
Frequently Asked Questions
How is this different from the Easy Clean grill?
Easy Clean grills use a manual slide-out drawer; this Self Cleaning grill automates the entire cycle with pneumatic cylinders, a solenoid and a timer — no drawer to physically remove.
Does it need a compressed air supply?
Yes — the pneumatic cylinders and FRL unit require a compressed air connection to operate the cleaning cycle.
Can the cleaning cycle be automated on a schedule?
Yes — the timer supports both a manual operating button and automatic scheduled cycles.
What size range is available?
Three standard sizes from 100mm to 200mm inlet/outlet diameter, with 3 to 5 magnetic elements — larger diameters and multi-stage configurations are available on request.
What Gauss rating and particle capture size does it offer?
11,000 Gauss NdFeB elements, capturing particles down to 1 micron.
Why Buy From PML
- 65+ years of magnetic separation engineering — automated, high-uptime grill systems for continuous process lines.
- Made and tested in-house — every grill is manufactured and checked to its stated Gauss rating.
- Fully automated cleaning — pneumatic cylinder and timer control as standard.
- Magnetic calibration and audit services available to verify field strength over time.
Need a larger diameter or multi-stage system? Enquire now and our engineering team will size the right grill for your process.
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.
