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

Filters Department Team

Tel.: +44(0)1621 862180