When to Change Your Edwards EMF20 Filter – And How to Do It Right
If you're running an Edwards vacuum pump with an EMF20 oil mist filter, regular maintenance isn't optional—it’s essential. A clogged or saturated mist filter can reduce efficiency, contaminate your workspace, and even damage your pump. In this post, we’ll show you:
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When to change the EMF20 filter elements
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How to replace them properly
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Where to get OEM parts at discounted prices
Let’s dive in.
? When Should You Change Your Edwards EMF20 Filters?
The EMF20 has two main components that need routine replacement:
1. Mist Filter Element (Part #: A22304199)
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Change every 6 months under standard use.
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In high-load environments (e.g., solvents, fine particulates), change more frequently.
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Watch for signs like excessive oil in the drain or pressure build-up at the exhaust.
2. Odor Removal Element (Part #: A22304077)
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Replace monthly, or any time you detect an oil smell from the exhaust.
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Critical for maintaining a clean lab or shop environment.
? How to Change an EMF20 Filter – Step by Step
Changing your filters is simple but must be done with care. Follow these instructions:
✅ Tools Needed:
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Allen wrench or screwdriver
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Clean lint-free cloth
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Replacement mist and odor elements
✅ Instructions:
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Turn off the vacuum pump and allow it to cool.
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Drain oil from the filter body using the drain plug.
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Disconnect exhaust ducting or tubing.
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Unscrew the four bolts or screws to open the EMF20 filter housing.
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Remove the old mist and odor elements. Handle with gloves if exposed to chemicals.
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Clean the interior housing with a cloth.
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Insert new filter elements, ensuring proper alignment.
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Reassemble the filter housing and tighten the bolts evenly.
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Reconnect exhaust ducting and restart the pump.
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Check for leaks and monitor pressure/output.
? Pro Tip: Always inspect the O-rings and D-seals. Replace if worn or damaged.
? Save on EMF20 Filter Parts at VacuumPumpSupply.com
We’re offering unbeatable prices on genuine Edwards filter elements. Here’s what’s on sale now:
? Edwards EMF20 Mist Filter Element – A22304199
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List price: $196
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Our price: $90
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OEM replacement. Fits directly into your EMF20 housing.
?️ Edwards EMF20 Odor Removal Element – A22304077
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Price: $85
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Eliminates oil vapor odor for a cleaner work environment.
? Complete EMF20 Filter Assembly – A46229000
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Price: $395
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Includes full NW25-compatible EMF20 assembly.
Stock up and save—don’t wait for filters to clog or fail!
? Maintenance Tips to Extend Filter Life
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Log your filter change intervals.
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Monitor back pressure at the exhaust.
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Replace both mist and odor filters at the same time to reduce downtime.
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Always keep spares on hand to avoid last-minute emergencies.
Final Thoughts
Replacing your Edwards EMF20 filters on schedule ensures clean operation, protects your pump, and keeps your work environment safe. Whether you're running a research lab or industrial line, regular filter service is a small investment that pays off big.
Ready to service your pump?
? Shop EMF20 filters now at VacuumPumpSupply.com