OS filter (continuous vacuum rotating filter)
Our OS filter (continuous vacuum rotating filter) is a cylindrical single-chamber type filter made after improving the multi-chamber type Oliver filter, and was developed with the aim of commercializing a simpler model at lower cost in comparison with the Young filter, in which the cylinder is divided into many sections.
It is a continuous vacuum rotating filter that reduces pressure while rotating a single-chamber filtration drum at low speed while filtration takes place on the external surface of the drum.
This type performs filtration on the external surface of the drum, and scrapes any attached cake off with a scraper.
Filtration commences after a filter aid layer is provided. The precoat layer is continuously scraped little by little with a special auto scraper attached to the surface of the aid, and the cake remains attached to a clean filtration surface. This type is suitable for filtration of difficult to filter material, and has the same structure as the general type with the addition of the scraper.
- Pressure loss is smaller than that with the multi-chamber type Oliver filter, and therefore, capacity per unit area is larger.
- No automatic switching valve, such as an automatic valve, is required.
- No unevenness or slack in the filter fabric, with a simple fixing method being used. And hence the filter fabric has a longer life.
We have a test system with a filtration area of 0.1m2, and have a consultation service available to users.
It has been used in a wide range of fields including food, paper, metal smelting, drugs, wastewater treatment, and general chemical engineering, and is very popular with customers.