All of our impeders are designed to ensure effective cooling and protection of the ferrite core inside the construction. It is essential that ferrite is properly cooled to maximise welding efficiency and maintain stable parameters for product quality.
Standard through flow impeders – Ferrite is totally enclosed inside the casing (above photo)
Exposed Ferrite impeders – around 10-15% of the end of the ferrite protrudes from the casing (below)
We have standard male imperial couplings but can offer metric or other threads on request.
EHE impeders are available in length options of 230mm, 330mm & 430mm.
Impeder Cooling
All of our impeders are designed to ensure effective cooling and protection of the ferrite core inside the impeder. It is essential that ferrite is cooled efficiently to maximise the welding efficiency and maintain stable parameters for product quality.
Coolant should be clean, preferably filtered. A pressure of 3 bar (45 PSI) will ensure adequate cooling under most operating conditions. Coolant flow requirements vary widely due to inlet temperature, weld power, frequency and weld area geometry. In high power density situations and at high ambient temperatures, a small chiller for impeder and work coil coolant can greatly improve efficiency.
Cooling by air or other gas is not recommended, but can be useful in special situations where the presence of water inside the tube cannot be tolerated. Gas, such as nitrogen, have a density that is at least 1,000 times less than that of water, so coolant volume must be increased accordingly.
