Protego BR
PROTEGO®
Excellence in Safety and Environment

DA-G

In-Line Detonation Flame Arrester for stable detonations and deflagrations in a straight through design, bidirectional

Features

Modular Design
Allows Replacement and Cleaning of Single FLAMEFILTER®
Directional
Bi-Directional
Fastest Disassembly and Assembly
of Single FLAMEFILTER®
Versatile Application Options
Various Uses Possible
Temperature Sensors Possible
Use of Temperature Sensors for G 1½ and G 2 Is Possible
Spare Parts
Cost-Effective Spare Parts
Function and Description

For Industrial Use in Gas Analysis Lines

The PROTEGO® DA-G Series is a compact in-line detonation flame arrester for installation in pipes with diameters up to 3“ and is used, for example, in industrial applications such as gas analysis lines. Once a detonation enters the Flame Arrester, energy is absorbed from the shock wave, and the flame is extinguished in the narrow gaps of the FLAMEFILTER® (1).

Main Component – PROTEGO® Flame Arrester Unit

The PROTEGO® Flame Arrester Unit consists of several FLAMEFILTER® discs firmly held in a housing. The gap size and number of FLAMEFILTER® discs are determined by the operating data and parameters of the mixture flowing in the line (explosion group, pressure, temperature). To provide an optimum result between the housing size, number of FLAMEFILTER® discs and their gap size, a device was developed that can be used for all explosion groups - IIA, IIB3 and IIC (NEC Group D, C MESG ≥ 0.65 mm and B). The standard design can be used with an operating temperature of up to +60°C / 140°F and an absolute operating pressure up to 1.1 bar / 15.9 psi. Devices with special approvals for higher pressures (see table 3) and higher temperatures are available upon request.

Many Individual Certifications

The device is bi-directional and equipped with a threaded connection. This can be adapted to international standards. The detonation arrester can be used at any location in the pipe, regardless of the location of the ignition source. EU conformity according to the currently valid ATEX directive. Approvals according to other national/international regulations on request.
Product Data

Dimensions

To select the nominal size (DN), please use the flow capacity charts on the following pages

DN G ½"G ¾"G 1"G 1¼"G 1½"G 2"
a80 / 3.1580 / 3.15100 / 3.94100 / 3.94155 / 6.10155 / 6.10
b55 / 2.1755 / 2.1776 / 2.9976 / 2.99124 / 4.88124 / 4.88
c (IIA)112 / 4.41112 / 4.41122 / 4.80122 / 4.80205 / 8.07205 / 8.07
c (IIB3 and IIC)135 / 5.31135 / 5.31145 / 5.71145 / 5.71205 / 8.07205 / 8.07
d————400 / 15.75400 / 15.75
SW32 / 1.2632 / 1.2650 / 1.9750 / 1.9775 / 2.9575 / 2.95

Dimensions in mm / inches, SW= width across flats

Selection of explosion group

MESGExpl. Gr. (IEC / CEN)Gas Group (NEC)
> 0,90 mmIIAD
≥ 0,65 mmIIB3C
< 0,50 mmIICB

Special approvals upon request

Selection of max. operating pressure

Expl. Gr.DNG ½"
G ¾"
G 1"G 1¼"G 1½"G 2''
IIAPmax1,2 / 17.41,2 / 17.41,1 / 15.91,1 / 15.91,1 / 15.91,1 / 15.9
IIB3Pmax 1,1 / 15.9 1,1 / 15.9 1,1 / 15.9 1,1 / 15.9 1,4 / 20.3 1,4 / 20.3
IICPmax1,1 / 15.91,1 / 15.91,1 / 15.91,1 / 15.91,6 / 23.21,6 / 23.2

Pmax = maximum allowable operating pressure in bar / psi absolute, higher operating pressure upon request

Specification of max. operating temperature

≤ 60°C / 140°FTmaximum allowable operating temperature in °C
-Designation

higher operating temperatures upon request

Material selection for housing

DesignBC
HousingStainless SteelHastelloy
GasketPTFEPTFE
FLAMEFILTER®*Stainless SteelHastelloy

* the FLAMEFILTER® are also available in the materials Tantalum, Inconel, Copper, etc. when the listed housing and cage materials are used.

Special materials upon request

Type of connection

Pipe thread DIN ISO 228-1DIN

other types of thread upon request

Flow Capacity Chart

The flow capacity charts have been determined with a calibrated and TÜV certified flow capacity test rig. Volume flow V in (m³/h) and CFH refer to the standard reference conditions of air ISO 6358 (20°C, 1bar). For conversion to other densities and temperatures refer to Sec. 1: “Technical Fundamentals”.