CXW – Centrifugal Separators
Product Code: CXW - Centrifugal Separators

The CXW product line consists of ten models in sizes DN 10-100, covering capacities from as low as 0.7 m3/h up to 90 m3/h. This range comes in three different materials: carbon steel (CKW), stainless steel AISI 304 (CRW) and stainless steel AISI 316 (CSW).

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A centrifugal separator is not actually a filter since there is no screen element inside to filter out the particles. The separation is instead ensured by means of centrifugal force, and the separator’s efficiency is directly proportional to the specific density and size distribution of the particles. The centrifugal separator eliminates 98% of all particles with a specific gravity of 2.6-2.8 (such as sand) down to a size of 75 microns, provided that the pressure loss over the unit is minimum 0.3 bar.

Centrifugal separators should be installed downstream of the feed pump in order to ensure enough pressure during purging, and to overcome the pressure drop over the unit.

 

Purge system

To drain off the suspended solids accumulated in the collection chamber of the centrifugal separator, either a manual discharge drain or an automatic discharge system can be used. Both are available from Bernoulli.

For the automatic discharge system, purging intervals and duration can both be easily adjusted. The automatic discharge system comes in two versions: electrical and pneumatic.

Both purge systems include a ball valve, an actuator and a time controller. The manual discharge drain consists of a ball valve with a hand lever.

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  • Separation occurs without any interruption to the flow
  • Very little liquid is lost by purging
  • No need for any consumable material
  • Zero maintenance
  • Separation efficiency
  • Specific gravity table

Working principle

A. A liquid containing particles is fed tangentially into the cylindrical top of the centrifugal separator to create rotation. Passing through slots in the intake chamber, the flow velocity is further accelerated.

B. The centrifugal force moves heavy particles to the sides of the barrel. They move downwards and accumulates in the collection chamber in the bottom of the separator.

C. A deflector plate, located in the top of the collection chamber, changes the direction of flow.

D. Solid-free liquid moves upwards inside the vortex and exits via the separator’s top outlet.

E. The separated solids are either periodically or continuously purged from the collection chamber.

Working_principle_A-E - FLTR - Purple Engineering

 

Centrifugal separators should be installed downstream of the feed pump in order to ensure enough pressure during purging, and to overcome the pressure drop over the unit.