Basically, the following applies when using an adsorber: “Only change when the bulk is completely discolored!” However, a delayed color change or no color change can occur due to the points mentioned. To nevertheless ensure that the adsorber protects the system, the following can be done:
Check the flow in the adsorber by “blowing”. The differential pressure of an adsorber is minimal. The air flows through the adsorber by “blowing” through the port. If a higher pressure is required, the adsorber is sticky (possibly due to oil) and must be replaced.
Weigh and compare adsorbers. The weights of all adsorbers can be found in the instructions, data sheets and on the Internet. If there is a difference between the nominal weight and the actual weight, there could be a foreign substance (e.g. oil) in the adsorber.
Send adsorber to GIEBEL FilTec and have it checked. Of course, any adsorber can be sent directly to us. NOTE: It is advisable to replace an adsorber (or spare parts package) after two years at the latest. This ensures safe use of the adsorber and protection of the system!
We check the adsorber, regenerate the silica gel and can thus determine whether foreign substances have been absorbed and what the status of the adsorber was.