Witt’s new back-purging filter serves as an analysis gas inlet filter on in-line gas analysers, and with its suction pipe, the device is intended to prevent the clogging of the filters effectively, and if desired, fully automatically
Milk, powder, coffee or flour-dust often pose a challenge to the in-line gas analysers by blocking the filters as they get sucked in. The new back-purging filter has pressure transmitters installed, which determine the degree of clogging from the pressure drop.
The device gives a signal when the limit value is reached, and then the purging process is activated at the push of a button. The filter element is cleaned by repeated pressure surges to the analysis gas. As a result, the dissolved contaminants are collected in a collecting bag.
Established in 1945 in Witten, Germany, WITT-Gasetechnik is a leading manufacturer of gas-related equipment. Witt’s products include gas mixers, gas analysers and metering systems, as well as package leak detection systems.
Martin Bender, gas technology specialist in Witt, said that fine-grained foods make the validation of the protective gas atmosphere more difficult, as tiny particles clog the filters on the gas analysers.
In this regards, Witt’s new back-purging filter effectively adds value to completely cleanse the choked particles. The back-purging filter flushing can be run both automatically as well as manually.
According to Bender, the device’s stainless steel housing measures 172 x 242 x 343 mm, and it uses a 230V power supply, with the pressure control switches and pressure gauges locating on the front panel. This ensures a smooth process of cleansing, prevents high-maintenance cost and is easy to operate.
