BOLL & KIRCH

Coalescer filter for the Oil & Gas industry

In the oil and gas industry, liquid/gas coalescer filters are commonly employed to separate liquids from gases. These filters are used with seal gas, fuel gas, heating and cooling gas, injection gas, and numerous technical gases. The coalescence element from BOLL & KIRCH consists of two layers, which fulfil different tasks. The first layer separates solids that may still be in the gas stream. In the second layer, liquid droplets are separated into a special tissue by coalescing the droplets.

Function of the coalescer

The small liquid droplets contained in the gas bond together on the fleece to form larger droplets (coalescence = compound). Gravity causes the droplets to flow down to the fleece fabric as soon as they have reached a certain size. The separated liquid can be collected and, if necessary, stored in a liquid container. Level measuring systems, magnetic level indicators or sight glasses (optional accessory) can be used to check the level.

Design of coalescing filter

In order to ensure an optimal filter design (be it the simplex coalescer or the duplex coalescer), various factors are taken into account:

  • separation efficiency
  • differential pressure
  • quantity of solid and liquid particles to be expected
  • gas components

as well as:

  • volumetric flow rate
  • pressure
  • temperature

The individual components’ state in the gas play a major role when designing the filter and selecting the appropriate separation mechanisms. Coalescing filters are generally used as a fine separator for droplets (concentrations normally in the ppm range).

Here you find an overview of BOLLFILTER coalescer / coalescing filter:

Questions about coalescers?

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BOLLFILTER Simplex Type 1.78.1 / 1.58.1
Simplex filter for high pressure and finer filtration »

BOLLFILTER Simplex Type 1.78.1 / 1.58.1
Flange Connection
ASME 2 ½" - 14" Type 1.58.1: DN 40 to DN 150 Type 1.78.1: DN 50 to DN 300
Connections inline
None
Filter element
Star-pleated element Disposable filter cartridges

BOLLFILTER Simplex Type BFB-C HD M
Coalescer gas filter for Heavy Duty operation »

BOLLFILTER Simplex Type BFB-C HD M
Features
The simplex filter for separating solids and aerosols (humidity) from gases. Gases saturated with dirt and humidity are separated by the multi-layered coalescer element (see figure).
Flange Connection
ASME or DIN ¾” - 8" / DN 20 - DN 200
Filter element
- Fiberglass/stainless steel disposable cartridges - Option available for preliminary separation using demister, cyclone, or - Cyclone demister all within the same housing.

Duplex Filter from BOLLFILTER

BOLLFILTER Duplex Type BFD-C/P DBB M
Coalescer and particle gas filter with Double Block and Bleed »

BOLLFILTER Duplex Type BFD-C/P DBB M
Features
A special design duplex filter for separating solids and/or aerosols (liquid content) from gases using a patented double block and bleed main transfer valve. This is intended for applications using high pressures and/or dangerous gas compositions, to ensure maximum operator safety.
Flange Connection
ASME or DIN ¾” – 8” or DN 20 – DN 200
Filter element
- Fiberglass/stainless steel disposable cartridges - Option available for preliminary separation using demister, cyclone, or cyclone demister all within the same housing

BOLLFILTER Duplex Type BFD-C HD M
Coalescer gas filter for Heavy Duty »

BOLLFILTER Duplex Type BFD-C HD M
Features
Duplex filter for separating solids and aerosols (liquid content) from gases
Flange Connection
ASME or DIN ¾” – 8” or DN 20 – DN 200
Filter element
Fiberglass/stainless steel disposable cartridges (as normal temperature and high/low temperature design); Option available for preliminary separation using demister, cyclone, or cyclone demister all within the same housing.
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Jörn Grotepaß, Head of Business Unit Compressors & Turbines Boll & Kirch Filterbau GmbH
Jörn Grotepaß Head of Compressors & Turbines Filtration

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