Corporate Buyers Guide

A compressor aftercooler takes the air from the air compressor and cools it. By cooling the air, the aftercooler also removes some of the moisture from the compressed air. The cooling causes the water in the air to condense out since cool air cannot hold as much moisture as warm air. Aftercoolers can be either air or water cooled, depending on your needs. Air cooled aftercoolers can reduce the temperature of the compressed air to about 20 F (10 C) over room temperature. Water cooled aftercoolers can get the temperature lower, to about 40 F (5 C). Either type are usually put near the compressor so the air coming out of the compressor can be cooled immediately.

Now, why is this desirable? Air coming out of a compressor is very hot, 200 F (90 C) to 400 F
(200 C). This can damage your equipment. Since it is both warmer and compressed, the air will contain a lot of moisture. The moisture causes corrosion and pressure drops which will require your compressor to run longer to get the same amount compressed air. It also causes damage to the tools and equipment which will require them to be repaired or replaced more frequently. Running the compressor longer, increased repairs, and more frequent replacements all cause costs to increase. An aftercooler can reduce these costs.

What is the difference between a walk in and a truck in oven? One of the differences is size. Walk in ovens are usually smaller and require a smaller door. Truck in ovens may be larger in capacity and require a larger doors. Typically these ovens range from 170 to over 700 cubic feet in volume.

.

Walk in ovens often have racks on the side walls to accept shelving that can be manually placed. With truck in ovens, the material to be treated is placed on racks which are then brought into the oven by truck. Truck in ovens sometimes have doors on both ends allowing material to be moved on carts into the oven and after treatment out the other side while new material is moved into the oven

from the front.

Both ovens have a maximum operating temperature of 1200 F (650 C). They use either electric or gas to heat the oven.

Walk in ovens and truck in ovens have either a natural convection or a forced air convection airflow. Either airflow can be horizontal or vertical. Natural convection, also known as gravity convection, uses an opening to allow the air to escape and set up an airflow. Forced air convection uses fans to create the airflow. Forced air convection can also be compound horizontal. The compound horizontal airflow has fans on both sides of the oven pushing the air toward each other causing an upward airflow in the center of the oven