Compressed air dryer service and repair
The dryer decides whether there is water in your compressed air line. Its failure means moisture in tools, pipework corrosion and rejects in production. We service refrigerant and desiccant dryers from various manufacturers, from diagnostics and refrigerant and desiccant dryer repair to periodic inspections and sizing a new unit.
We check the dryer together with the machine whenever a plant orders screw compressor service since the dew point also depends on the condition of the compressor itself and its cooling.
Refrigerant and desiccant dryers - the differences and typical faults
Refrigerant dryers
Dew point of about +3 degrees C, the standard in typical pneumatics. Most common faults: the refrigeration circuit (refrigeration compressor, refrigerant, fan), a non-working condensate drain and a fouled or leaking heat exchanger.
Desiccant dryers
Dew point of minus 40 degrees C or lower, for processes that need very dry air. Most common faults: worn desiccant, the column switching valves and the regeneration cycle control.
Desiccant dryers - classified by how the desiccant bed is regenerated
Cold-regenerated (heatless)
The desiccant bed is regenerated with part of the already dried compressed air, typically a low double-digit percentage of the flow. A simple and reliable design, typical for smaller and medium flows. Most common faults: switching valves, exhaust silencers, worn desiccant and the cycle controller.
Heat-regenerated (with a heater, possibly with a blower)
The desiccant bed is regenerated with hot air, so the compressed air used for regeneration is much lower, a cost-effective solution at larger flows. Most common faults: the heater, the blower, temperature sensors, valves and cycle control.
We service both types: regeneration cycle diagnostics, desiccant replacement, heater and valve repair and dew point verification after service. We also size new units, including Hertz HRD and HDA dryers from the Hertz Kompressoren range, for which we are an authorized distributor.
Signs of a dryer problem
Water at the points of use
Condensate in hoses, tools and cylinders, moisture visible at the outlets even with the dryer running.
Rising dew point
The dew point reading climbs above the value your process requires, meaning the dryer cannot keep up or is malfunctioning.
Icing or overheating
Frost on the heat exchanger, or the opposite, a hot casing and high operating temperature. Both symptoms point to the refrigeration circuit.
Continuous purging
A desiccant dryer that keeps venting air for regeneration, or a condensate drain that blows continuously, is a real compressed air loss.
What we do
- On-site dryer diagnostics and repair: measuring operating parameters, checking the refrigeration circuit, controls and switching valves.
- Periodic inspections combined with the compressor inspection, so one visit covers the whole compressor room.
- Desiccant replacement in desiccant dryers and regeneration cycle adjustment, to reduce the air used for purging.
- Heat exchanger cleaning and condensate drain repair, the most common cause of water in the line in a dryer that looks fine at first glance.
- Sizing a new dryer to the flow, pressure and required dew point when repair is not cost-effective, for both refrigerant and desiccant dryers.
- We complete the system with the right compressed air filtration and treatment because a dryer without proper filtration and separation cannot maintain the required air quality class.
Dryer service - FAQ
The most common questions about inspections, repairs and sizing of compressed air dryers.
Need service or spare parts?
Our team will recommend the best solution and send a quotation the same day.
Book dryer service
Tell us which dryer you have and how the problem shows up, and we will arrange a diagnostic visit and the repair scope.
Contact
Need an inspection, overhaul or rental? Fill out the form - we'll respond within 24 hours.
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Location
ul. Słowackiego 201 26-600 Radom Mazovian Voivodeship, Poland
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ul. Słowackiego 201, 26-600 Radom