BOLLFILTER Duplex BFD-C/P Double Block and Bleed

The BOLLFILTER duplex filter type BFD-C/P DBB consists of two filter chambers. One filter chamber is in operation while the other is being cleaned or on stand-by. If contamination exceeds a tolerance threshold, the unit can switch over to the clean filter side - by means of the Double Block and Bleed method - without any pulse pressure. The contaminated filter element is then cleaned while operation continues.
BOLLFILTER Duplex BFD-C/P Double Block and Bleed
Features Duplex filter for separating solids and aerosols (liquid content) from gases. Due to the double block and bleed main changeover switch valve, this filter guarantees a particularly high level of operational safety.
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 µm - 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
E-Mail: grotepass@bollfilter.de