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SUPPORT / PM DOCUMENTATION

Preventative Maintenance Guidelines for N-EVAP Evaporators

Keep your N-EVAP performing like new

Organomation’s N-EVAP evaporators are built with durable steel and aluminum components to stand up to laboratory conditions, and with proper care can last well over a decade. Routine cleaning and periodic preventative maintenance inspections can help you avoid downtime, improve sample recovery, and extend the life of your instrument.

Table of Contents:

- Routine Care
- Annual Preventative Maintenance
- Choose the PM Option That Works For You
- Find Your PM Documentation
- PM Quote Request Form

Routine Care

Daily and weekly upkeep can help your evaporator run smoothly between annual PM inspections. These basic tasks are best handled by lab personnel and are essential to preserving the longevity of your system.

 

Needles

Needles should be cleaned after each use to prevent contamination and ensure consistent evaporation. They can either be cleaned by hand or with laboratory washers such as ultrasonic cleaners or autoclaves.

For hand-cleaning, wipe the exterior with a solvent-dampened cloth, then draw a gentle cleaning solution through the needle using a syringe, repeating several times. Rinse with deionized water and dry thoroughly. Bent, clogged, or corroded needles should be replaced.

→ Read more: How to Clean Evaporation Needles

 

Heat Bath Maintenance

If your model includes a water bath:

Mineral or algae buildup in the water bath can decrease the life of the heating elements if left unchecked. To reduce scale buildup, we recommend changing the bath water weekly and using either distilled or deionized water to heat samples. You can add a mild algaecide (like VWR’s Clear Bath or Fisher’s Bath Clear) to prevent biological growth, especially if water is left in the bath for extended periods.

Clean the bath monthly or as needed using a mild cleaning solution like Liquinox and a non-abrasive scouring pad. Acid resistant units, which have a black Teflon coating on the inside of the bath pan, should be cleaned with a sponge or paper towel to avoid damaging the coating.

If your model includes a dry bead bath:

No regular cleaning is required for dry bead bath models, though beads may need replacing after major solvent spills.

 

Air Filter

Discoloration can indicate the air filter is saturated or has become contaminated with oil. A clogged filter may reduce performance and should be replaced.

→ Read more: When to Replace the Air Filter in a Nitrogen Blower

Annual Preventative Maintenance

Organomation recommends that N-EVAPs be inspected and serviced every one to two years. This may be performed by lab staff using a PM kit or scheduled with a certified Organomation service partner.

Annual preventative maintenance for an N-EVAP typically includes bath calibration, hoist, manifold, and sample holder alignment, proactive replacement of routine wear parts, inspection of other serviceable components, and a verification of gas flow throughout the system.

⚠️ Caution: Always follow the official PM instructions for your specific model. This guide is intended to provide general recommendations only.

Find your PM documentation

 

Bath Calibration

Confirm the bath reaches and maintains target temperatures. For digital models, recalibration should be done every 1–2 years to ensure accuracy.

 

Replacement of Routine Wear Parts

We recommend preemptively replacing the air filter, evaporation needles, and silicone gas distribution tubing for optimal performance, regardless of condition. Replacing these parts every 1-2 years helps prevent unexpected downtime or contamination due to blocked or corroded needles, cracked tubing, or a saturated air filter.

Request a quote for a PM kit

 

Set Screws

The sample holder, nitrogen delivery carousel, and hoist are held in place by set screws. These can loosen over time, and should be checked and retightened as needed to ensure the evaporator remains secure.

 

Hoist Alignment (Water Bath Models Only)

The manifold should glide smoothly on the center rod. If movement is jerky or the unit sticks, realignment or inspection may be required.

 

Manifold & Valve Alignment

Valve tubes should slide smoothly up and down and be held securely by the valve tube fittings. Each valve tube should line up with the center of a sample holder slot. Alignment can be adjusted with a hex key.

 

Sample Holder Maintenance

Samples should be held securely in place by the retention spring. For models with adjustable support trays, the height adjustment nuts should move freely.

 

Other Wear Parts to Inspect

Common wear parts such as luer fittings, valve tubes, nitrogen fittings, and hoist springs should be inspected for wear and replaced if necessary. The expected lifetime of these parts is longer than two years but may vary based on usage. A full list of common wear parts and replacement criteria can be found in the preventative maintenance documentation on the product page for each model.

Find your PM documentation

 

Gas Flow Verification

After reassembling the evaporator, a final flow verification should be performed to make sure that the gas pathway is tight and everything is still functioning as intended.

 

What If You Find an Issue?

If anything looks worn, misaligned, or non-functional during your inspection, replacement parts are available from Organomation. Contact us for help identifying the correct parts or scheduling a service visit for your evaporator.

Choose the PM Option That Works For You

Annual preventative maintenance can either be completed yourself or with assistance from a trained Organomation service partner.

Do-It-Yourself Preventative Maintenance

For labs with more time than money, Organomation offers PM kits that include step-by-step instructions, all routine replacement parts, and the hex key needed to adjust your N-EVAP. You will need a Phillips head screwdriver and a calibrated thermometer if your N-EVAP has a heating unit. PM typically takes 1-3 hours to complete. If any issues are found during the PM inspection, reach out to Organomation for any additional wear parts that may need to be replaced.

Request a quote on a PM kit

 

Schedule a PM Visit

For busy labs looking to minimize downtime, Organomation’s certified service partners can perform a full PM visit on-site. They’ll bring all necessary tools, calibration equipment, and standard replacement parts, along with an assortment of potential wear parts to be replaced if needed.

Request a PM service quote

 

Keep Your Instrument Proactive, Not Reactive

Even after two years, your N-EVAP is likely still in excellent condition—but preventive maintenance is your insurance policy against unexpected issues. By staying ahead, you’ll protect your investment and keep your lab running efficiently.

PM Quote Request Form

 

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