Protego DA-SB-PTFE In-Line Detonation Flame Arrester

For Stable Detonations And Deflagrations In A Straight Through Design With Shock Absorber, Bidirectional

DA-SB-PTFE Explosion Group: IIA1, D / IIA

• Build up of adhesive materials is prevented by the smooth surfaces
• Application especially for corrosive and polymerising media minimum number of FLAMEFILTER discs due to the effective shock absorber
• Different series allow increase of FLAMEFILTER size for given flange connection resulting in lower pressure drop across the device
• Service-friendly design
• The modular design enables each individual FLAMEFILTER to be replaced
• Bidirectional operation as well as any direction of flow and installation position
• installation of temperature sensors is possible
• Less soiling of the device lowers service, operating and life-cycle cost
• Minimum pressure loss and associated low operating and life-cycle cost

Function and Description

The in-line detonation flame arresters type PROTEGO DA-SB-PTFE are the latest generation of flame arresters and are distinguished by its unique resistance to adhesive and corrosive media. The use of fluoroplastics as a high-tech housing coating and as solid material for the flame arrester element is unique throughout the world.

The speed of incoming detonations is highly reduced by the effective shock absorber (1) and result in an equal pressure distribution across the FLAMEFILTER® surface. This improves the flame extinction in the narrow gaps of the original PTFE FLAMEFILTER (3).

The devices are symmetrical and offer bidirectional flame arresting for deflagrations and stable detonations. The arrester essentially consists of two coated housing parts (4), two coated shock absorbers and the PROTEGO® flame arrester unit (2) in the center. The PROTEGO flame arrester unit is modular and consists of several FLAMEFILTER® discs and spacers firmly held in a FLAMEFILTER® cage. The number of FLAMEFILTER® discs and their gap size depends on the arrester‘s conditions of use.

The detonation arrester PROTEGO DA-SB-PTFE can be used for explosion group IIA (NFPA group D). The standard design is approved at an operating temperature up to +60°C / 140°F. The maximum allowable operating pressure depends on nominal diameter (DN) and nominal size (NG) and amounts to a maximum of 2.4 bar / 34.8 psi absolute (for DN50 / 2” see table 3).

EU conformity according to the currently valid ATEX directive. Approvals according to other national/international regulations on request. 

To select the nominal width/nominal size (NG/DN) - combination, use the flow capacity charts. *Dimensions in mm / inches.

Electrically conductive special materials upon request.

Pmax = maximum allowable operating pressure bar / psi absolute, higher operating pressure.

upon request in-between size up to Pmax upon request.

Higher operating temperatures upon request.

Other connections upon request.

Additional special flame arresters upon request. Resistance thermometer for device group II, category (1) 2 (GII cat. (1) 2).