Protego BR
PROTEGO®
Excellence in Safety and Environment

DR/ES, DN 1/4 - 3/4

In-Line Detonation Flame Arrester for stable detonations and deflagrations in right angle design, unidirectional

Features

Compact Design
Eases Installation Close to Floors and Walls
Reduced Number of FLAMEFILTER® Discs
Low Number of FLAMEFILTER® Discs Due to Shock Absorber Technology
Fastest Disassembly and Assembly
of Single FLAMEFILTER®
Explosion Safety
Provides Protection Against Deflagration and Stable Detonation
Angle Bodied
Saves Pipe Elbows
State of the Art Protection
for Any Hydrogen/Air Mixture
Spare Parts
Cost-Effective Spare Parts
Low Costs
Low Operating and Lifecycle Costs
Function and Description

Protects Against Deflagrations and Stable Detonations

The PROTEGO® DR/ES Series In-Line Detonation Flame Arrester with connection size up to ¾“ is ideal for installation in small pipes and to protect equipment such as gas analyzers. The device protects against deflagrations and stable detonations. It can be installed anywhere in the pipe no matter what the distance is from the potential ignition source. The small and compact Flame Arrester has a right angle design.

Main Component – PROTEGO® Flame Arrester Unit

Once a detonation enters the Flame Arrester, energy is absorbed from the detonation shock wave by diversion mainly through the shock absorber (1) before the flame is extinguished in the narrow gaps of the FLAMEFILTER® (3). The PROTEGO® Flame Arrester Unit (2) consists of several FLAMEFILTER® discs and spacers (for explosion group IIC - NEC group B) whose gap size and number is determined by the operating parameters of the processed fluid (explosion group, pressure, temperature). This device is available for explosion groups IIB3 and IIC (NEC group C MESG ≥ 0.65 mm and B).

Many Individual Certifications

This In-Line Detonation Flame Arrester functions unidirectional and is equipped with a threaded connection. The thread can be adapted to international standards. The standard design is approved at an operating temperature up to +60°C / 140°F and an absolute operating pressure acc. to table 3. Devices with special approvals can be obtained for higher pressures and higher temperatures upon request. 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

DNG ¼"G ½"G ¾"
a48 / 1.8970 / 2.7680 / 3.15
b35 / 1.3840 / 1.5747 / 1.85
c70 / 2.7675 / 2.9587 / 3.43
d108 / 4.25115 / 4.53135 / 5.31
e34 / 1.3450 / 1.9760 / 2.36

Dimensions in mm / inches

Selection of explosion group

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

Special approvals upon request

Selection of max. operating pressure

Expl. Gr.DNG ¼"G ½"G ¾"
IIB3Pmax1,2 / 17.41,2 / 17.41,2 / 17.4
IICPmax1,1 / 15.91,1 / 15.91,1 / 15.9

Pmax = maximum allowable operating pressure in bar / psi absolute, higher operating pressure upon request,
Expl. Gr. IIB3 covers Expl. Gr. IIA

Specification of max. operating temperature

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

higher operating temperatures upon request

Material selection for housing

DesignBCD
HousingSteelStainless SteelHastelloy
Cover with shock absorber*SteelStainless SteelHastelloy
GasketPTFEPTFEPTFE
Flame arrester unitAAB

G ¼" only comes in design C and D
* G ¼" without shock absorber

Special materials upon request

Material combinations of flame arrester unit

DesignAB
FLAMEFILTER®*Stainless SteelHastelloy
SpacerStainless SteelHastelloy

* the FLAMEFILTER® are also available in the materi- als 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”.