Most all manufacturers require you to use their filter and lubricant during warranty periods; this ensures that they are protected with products they designed with the specifications they feel are necessary to properly maintain their equipment.

No, typically there are two types of refrigerant dryers, cycling and non-cycling.

A cycling dryer works similarly to a refrigerator; it cools a thermal mass down to a set temperature and then the compressor shuts off until the thermal mass temperature comes up enough to turn the compressor back on. A non-cycling dryer compressor runs all of the time and there is a hot-gas by-pass valve that may need to be adjusted as ambient conditions change to maintain a specific dew point range. This makes the cycling dryer more energy efficient and less likely to freeze-up.

Yes, but if the application is not correct for a rotary screw compressor, you will experience high maintenance costs, oil carry over and premature failure of the compressor. It is best to explain in detail the application the compressor will be going into with a sales specialist to determine the correct type of compressor for you.

Yes, even though the office hours are 7:30am to 4:30pm Monday through Friday we have a 24 hour answering service that will contact one of several persons on call 24/7/365.

High temperature is caused by restricted coolant flow. Coolant flow can be air, water and oil. In a lubricated rotary screw compressor check the air filter and oil filter for restrictions.  Most oil filters have a 1,000 hour life. Check your oil level; oil acts as a coolant and sealer in these compressors; low level equals elevated temperatures. Air cooled compressors have a radiator that needs to have full flow of air from the fan or there will not be enough heat transfer. Watercooled compressors may have a restriction in the water flow, or the water inlet temperature may be elevated. Most compressors are equipped with a thermal valve (much like a car's thermostat) that may be stuck and not sending enough of the oil through the cooler.

All air compressors will discharge oil into the air lines at varying amounts. A rotary screw compressor may have a scavenge line plugged or the separator element may need to be replaced. A reciprocating compressor may not be cycling properly for its design, or may need to have valve and or piston ring work done. For complete elimination of the oil carryover, a coalescing filter will need to be installed in the air line.

A rotary screw compressor is designed to best operate at 100 % load, 100% of the time. For example, if you are a small mechanic shop with 4 technicians, there will not be a constant air demand and a rotary screw compressor will be loading and unloading frequently, causing increased oil carryover and premature maintenance and repair needs. If you have a continuous air usage a rotary screw compressor would be well suited when sized properly.

The most common material used is black iron pipe, but galvanized iron pipe, copper and extruded aluminum are used as well. Extruded aluminum has been gaining in popularity; it is light weight and utilizes a push to lock fitting eliminating the need for pipe wrenches and is very quickly installed.



This varies greatly depending on the type of oil. If you are using petroleum oil in a rotary screw compressor, you will need to change the lubricant every 500 to 1000 hours. If you are using a synthetic or partial synthetic, you will have a range of 4,000 hours all the way up to 12,000 hours. Make sure you know what oil you are using. Most lubricants are not compatible with each other.