The BOLLFILTER duplex type BFD-C, coalescer and particle filter for gas consists of two filter chambers. If contamination exceeds a tolerance threshold,
the unit can switch over to the clean filter side without any pulse pressure. Switch-over is performed by a switch-over cock valve. The design of the filter excludes simultaneous isolation of both filter chambers.
Features Duplex filter for separating solids and aerosols (liquid content) from gases
Nominal diameter Up to DN 200 (further on request)
Filter element fibreglass/stainless steel disposable cartridges*

Optionally with preliminary demister or cyclone demister
Grade of filtration 0,1 - 250 µm
Operating pressure >500 bar (size and temperature dependent)
Filter housing - carbon steel (St 45-8 / A106B)
- stainless steel (1.4404 / 316L)
- non-welded
General Accessories and Special Equipment 1.) Connecting elements
Flexible connection possibilities
e.g., flanged, NPT, weld-on ends, ball valves, needle valves

2.) Instruments
Differential pressure connections such as optical and optical/electrical differential pressure measurement systems

3.) Materials
Filters available on request in Duplex or Super Duplex

4.) Optional equipment
Cover lifting/pivoting mechanism
Cover safety device
Special accessories for gas filtering Pre-separator for liquid reduction / cyclone and cyclone demister

In addition to standard, filters also available in Duplex and Superduplex (on request)

Liquid level switches

Magnetic level indicator

Bulls Eyes

Adaptable fluid reservoir for saving the separated fluid
* as normal temperature and high/low temperature design

Contact person

Jörn Grotepaß
Tel.: +49 2273 562-214