What is a filter drier and what is its purpose?

What is a filter drier and what is its purpose?

A filter-drier in a refrigeration or air conditioning system has two essential functions: one, to adsorb system contaminants, such as water, which can create acids, and two, to provide physical filtration. Evaluation of each factor is necessary to ensure proper and economical drier design.

What are filter driers used for?

It is important to locate a filter-drier in a refrigeration system. Its role is to remove moisture from the refrigerant and lubricant by absorbing and retaining moisture deep within the desiccant granules. The blend of desiccants used in the Catch-All is specially formulated for exceptional moisture removal.

What are two styles of filter driers?

There are generally two main types of liquid-line driers. One is the straight-through sealed type and the angle replaceable core type. Both types offer protection in heating and cooling cycles and use the singular filter drier.

What is the purpose of the filter drier and when should it be changed?

Over time, small pieces of parts can break free. These tiny pieces can circulate through the system, clogging capillary tubes, TXVs, or even the filter drier. A filter drier needs to be replaced anytime the air conditioners refrigeration system is worked on.

How does a filter drier work?

Filter driers are usually installed in the liquid line of a dry-expansion refrigeration system, where they have a dual function. First, they trap coarse particulate contamination and copper shavings, and second, they capture any moisture present in the system.

How do I know if my filter drier is bad?

Signs and Symptoms of a Bad Liquid Line Filter Dryer

1. Restricted Evaporator Coils.
2. Freezing Evaporator Coil.
3. Temperatures Drop Across the Filter Drier.
4. Lower Condenser Coil Temperatures.

How long do filter driers last?

All filter driers should be replaced every 2 years or by manufacturer’s recommendation. The Receiver Drier’s function in an automotive a/c system is to filter foreign material, remove moisture from refrigerant and to act as a reservoir to supply liquid refrigerant to the TX valve.

Where is the filter drier located?

Sometimes filter driers can be found in the liquid line of the compressor. The segment of piping leading to the compressor inlet is called the suction line, while the segment following the compressor outlet is called the liquid line.

What is the material inside the filter drier called?

desiccant
Receiver/driers contain a material called desiccant. The desiccant is used to absorb moisture (water) that may have gotten inside the A/C system during manufacture, assembly or service. Moisture can get into the A/C components from humidity in the air. This is the “drier” function of the receiver/drier.

How do you know if a filter drier is bad?

Bad A/C receiver drier symptoms

1. Unusual noises.
2. Leakage.
3. Bad odour.
4. Ineffective cooling.
5. Cloudy sight glass.

When should I replace my filter drier?

How often should a filter drier be changed?

every 2 years
All filter driers should be replaced every 2 years or by manufacturer’s recommendation. The Receiver Drier’s function in an automotive a/c system is to filter foreign material, remove moisture from refrigerant and to act as a reservoir to supply liquid refrigerant to the TX valve.

What’s the purpose of an AC filter drier?

Filter Drier What is it and what does it do. Filter driers are exactly what they sound like, they are filters. They filter the refrigerant inside the ac system. Filter driers need to be able to trap and contain moisture, acid, contaminants and wax from circulating throughout the air conditioner.

How does a suction line filter drier work?

The only way to ensure the new compressor runs its full life is to install new filter driers and use acid away in the system. Acid away is a product used to remove acid from dirty systems. Some manufacturers say that a suction line filter drier does a better job of removing moisture from the system.

What happens to the water in a filter drier?

Then they are evaporated and cooled as the pressure is released. Then the process is continually repeated for hours, days, and months until a chemical reaction takes place. On hot days, the high temperature and pressure on the high side of the system reaches still higher levels.

How does a metering device work in a filter drier?

If the metering device is a capillary tube, the outlet of the drier is typically sized to allow brazing the capillary tube into the drier. The screen in the drier is placed far enough away so that the capillary tube can be inserted into the drier without blocking the refrigerant flow into the capillary tube.