Moisture Traps | McMaster-Carr

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174 Products

Compressed Air Separators

Automatic-Drain Compressed Air Separators

A float-operated drain valve on these separators automatically opens when the bowl begins to fill. The first step in water removal, use one of these separators to remove the large amount of water as compressed air cools.

Compressed Air Separators for Oil Removal

In addition to removing large amounts of water, these separators also remove particles and oil droplets. Place them after your compressor and aftercooler, or at the point of use in applications that don't require an aftercooler.

High-Flow Compressed Air Separators

These separators have higher flow rates compared to our other compressed air separators. Prevent equipment damage and wear caused by moisture in your compressed air supply. The first step in water removal, use one of these separators to remove the large amount of water created as compressed air cools.

Compressed Air Condensate Separators

When water is condensed out of a compressed air system, it contains oil from the compressor that makes disposal difficult. These separators use two-stage filtration to reduce oil content to below 20 parts per million.

Process Filtering

Vacuum-Rated Air Separators for Water Removal

Improve vacuum system efficiency and protect components from moisture—these separators remove over 90% of water from air.

Moisture/Particle Separators

Separators remove 99% of particles from air, gas, and steam lines and have no filter cartridges or baskets to clean and replace.

Desiccants

Desiccant Canisters

Stored in a durable canister, these desiccants can be reactivated after use.

Indicating Desiccant Canisters

Know when it's time to reactivate these desiccants—they turn from blue to pink when they reach maximum moisture absorption.

Indicating Desiccant Bags

Know when it's time to change these desiccants—they turn from blue to pink after absorbing 8% of their weight.

Food Industry Desiccant Bags

FDA compliant for direct contact with food, these Tyvek bags absorb vapors, odors, and gases to keep products fresh.

Desiccant Bags

These desiccants are best when relative humidity is at least 40%.

High-Humidity Desiccant Bags

When relative humidity is at least 90%, use these desiccants.

Adhesive-Back High-Humidity Desiccant Bags

When relative humidity is at least 90%, stick these desiccant bags to items that need to stay dry.

Low-Humidity Desiccant Bags

Use when relative humidity is below 40% or temperatures exceed 77° F.

Indicating Bulk Desiccants

Know when it's time to reactivate these desiccants—they turn from blue to pink after absorbing 6% of their weight.

Bulk Desiccants

Reactivate these desiccants after use by heating them.

Desiccators

Protect material from moisture by storing them in these desiccators.

Dehumidifying Cabinets

Store and protect 3D printer filaments, optical equipment, and other sensitive material in a humidity-controlled environment. Also known as dry boxes and desiccator cabinets, these cabinets prevent moisture-sensitive 3D printer filaments, such as nylon, ABS, and polycarbonate, from becoming brittle, discolored, or broken. They also keep sensitive electrical and optical equipment, such as microscopes and lenses, free from mold and fungus.