SL series inline suction filter is composed of aluminum alloy bowl, element, by-pass valve and visual indicator and electrical indicator. It is light in weight and storg. This series filter has features as follows:
1) Visual indicator: When filter element is clogged by contaminants, the red signal of visual indicator will be rised slowly, the element should be changed or cleaned when the red signal rises to the top-position, push the restorer to allow the red signal ring downfall after changing or cleaning element.
2) Electrical indicator: When filter ele, emt is clogged by contaminants, and the vacuum pressure reaches-0.018Mpa in filter outlet, the electrical indicator will act and indicate that the element should be changed or cleaned in that time.
3) By-pass valve: When the vacuum pressure reaches-0.02Mpa, the by-pass valve will automatically open to protect the pump safety.