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PROTEGO
Excellence in Safety and Environment

DR/EU

In-Line Detonation Flame Arresterfor unstable and stable detonations and deflagrations in right angle design with a shock absorber, unidirectional

Features

Reduced Number of FLAMEFILTER® Discs
low number of FLAMEFILTER® discs due to shock absorber Shock absorber A shock absorber is a device that reduces the kinetic energy of a detonation. technology
Fastest Disassembly and Assembly
of single FLAMEFILTER®
Modular Design
allows replacement and cleaning of single FLAMEFILTER®
Angle Bodied
saves pipe elbows
Spare Parts
cost-effective flame arrester / spare parts
Provides Safety
protects against deflagrations for all explosion Explosion Abrupt oxidation or decomposition reaction producing an increase in temperature, pressure, or in both simultaneously. groups IIA, IIB3 and IIC (NEC groups D, C and B)
Extended Application Range
for elevated operating temperatures and pressures
Low Costs
low operating and lifecycle costs
Function and Description

Protects against Deflagrations and stable and unstable Detonations

The PROTEGO® DR/EU series of in-line detonation flame arresters Detonation flame arrester Flame arrester designed to prevent the transmission of a detonation. represents further development of PROTEGO® flame arrester series DR/ES, which has been successfully used in industry for decades. The device Device A device is a pipe component that influences the media flow by opening, closing, or partially shutting off the flow channel or by dividing or mixing the media flow. protects against deflagrations and stable and unstable detonations. The classic right-angle design offers considerable costs and maintenance Maintenance Combination of all technical and administrative actions, including supervision actions, intended to maintain or restore a unit in working order. advantages over the straight-through design.

Main component - PROTEGO® Flame Arrester

Once a detonation Detonation Explosion propagating at supersonic velocity and characterized by a shock wave (EN 1127-1: 1997). enters the flame arrester, energy is absorbed from the detonation shock wave by the integrated shock absorber (1) before the flame is extinguished in the narrow gaps of the FLAMEFILTER® (3). The PROTEGO® flame arrester unit PROTEGO® flame arrester unit The PROTEGO® flame arrester unit is the main component of a flame arrester. It prevents flame propagation. (2) consists of several FLAMEFILTER® discs and spacers firmly held in the FLAMEFILTER® casing FLAMEFILTER® casing Enclosure for FLAMEFILTER® including insert rings. (4). The gap size and number of FLAMEFILTER® discs are by the operating conditions of the flowing mixture (explosion group, pressure, temperature). This device is can be used for explosion groups from IIA to IIB3 (NEC group D to C MESG ≥ 0.65 mm).

Many Individual Certifications

The standard design can be used with an operating temperature Operating temperature Temperature reached when the equipment is operating under design conditions. of up to +60°C / 140°F and an absolute operating pressure Operating pressure Operating pressure is the pressure existing at normal operating conditions within the system being protected. acc. to table 3. Devices with special approval for higher pressures and temperatures are available upon request. EU conformity according to the currently valid ATEX directive. Approvals according to other national/international regulations on request.
Product Product Includes equipment, protective systems, devices, components and combinations of these. Data and Features

Dimensions

To select the nominal size Nominal size The nominal size is an alphanumeric designation of size for components in a piping system, used for reference purposes, comprising the letters DN followed by a dimensionless integer that is indirectly related to the physical size of the bore or outside diameter of the connections, expessed in millimeters. (DN), please use the flow capacity charts on the following pages

DN25 / 1"32 / 1¼“40 / 1½“50 / 2“65 / 2½“80 / 3"100 / 4"125 / 5"150 / 6"
a125 / 4.92125 / 4.92153 / 6.02155 / 6.10198 / 7.80200 / 7.87250 / 9.84332 / 13.07335 / 13.19
b140 / 5.51140 / 5.51183 / 7.20185 / 7.28223 / 8.78225 / 8.86290 / 11.42357 / 14.06360 / 14.17
c210 / 8.27210 / 8.27290 / 11.42290 / 11.42365 / 14.37365 / 14.37440 / 17.32535 / 21.06535 / 21.06
c1285 / 11.22285 / 11.22395 / 15.55395 / 15.55500 / 19.69500 / 19.69595 / 23.43750 / 29.53750 / 29.53
d150 / 5.91150 / 5.91210 / 8.27210 / 8.27275 / 10.83275 / 10.83325 / 12.80460 / 18.11460 / 18.11
e495 / 19.49495 / 19.49600 / 23.62600 / 23.62705 / 27.76705 / 27.76795 / 31.30950 / 37.40950 / 37.40

Dimensions in mm / inches

Selection of explosion group

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

Special approvals upon request

Selection of max. operating pressure

Expl. Gr.DN25  / 1"32  / 1¼"40  / 1½"50 / 2"65 / 2½"80 / 3"100  / 4"125  / 5"150  / 6"
IIAPmax1,6 / 23.31,6 / 23.31,6 / 23.31,6 / 23.31,6 / 23,.31,6 / 23.31,5 / 21.71,2 / 17.41,2 / 17.4
IIB2Pmax1,4 / 20.31,4 / 20.3
IIB3Pmax1,6 / 23.21,6 / 23.31,6 / 23.31,6 / 23.31,6 / 23.31,6 / 23.31,4 / 20.31,2* / 17.41,2* / 17.4

Pmax = maximum allowable operating pressure in bar / psi absolute, higher operating pressure upon request, * Special flame arrester unit Flame arrester unit Flame arrester casing with FLAMEFILTER® set.

Specification of max. operating temperature

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

higher operating temperatures upon request

Flange connection type

EN 1092-1; Form B1
ASME B16.5 CL 150 R.F.

Design Types and Specifications

There are four different designs available:
Basic design of the detonation arresterDR/EU- – –
In-line detonation flame arrester In-line detonation flame arrester A detonation flame arrester is designed to prevent the transmission of a detonation. with integrated temperature sensor Integrated temperature sensor Temperature sensor integrated into the flame arrester, as specified by the manufacturer of the flame arrester, in order to provide a signal suitable to activate counter measures. * as additional protection against short time burning Short time burning Stabilized burning for a specific time. of one sideDR/EU- T –
In-line detonation flame arrester with heating jacketDR/EU- H –
in-line detonation flame arrester with integrated temperature sensor* and heating jacketDR/EU- H - T

*Resistance thermometer for device group II, category (1) 2 (GII cat. (1) 2)

Material selection for housing

Design  BCD 
Housing Housing A housing is a solid shell, which surrounds a content, either protecting the content from external influences, or protecting the environment from the content. Carbon SteelStainless SteelHastelloy
Heating jacket (DR / EU-H-(T)-...)SteelStainless SteelStainless Steel
Cover with shock absorberSteelStainless SteelHastelloy
O-RingFPM*PTFEPTFE
Flame arrester unitAC, DESpecial materials upon request

* for devices exposed to elevated temperatures above 150°C / 302°F (T150), gaskets made of PTFE.

The housing and cover with the shock absorber can also be delivered in steel with an ECTFE coating Coating Coating is the application of a firmly adhering layer of shapeless material to the surface of a workpiece. .

Material combinations of flame arrester unit

Design ACDE
FLAMEFILTER® cageSteelStainless SteelStainless SteelHastelloy
FLAMEFILTER®*Stainless SteelStainless SteelHastelloyHastelloy
Spacer Spacer The spacer is a component that is generally used in a PROTEGO® flame arrester as a spacer within the FLAMEFILTER® se Stainless SteelStainless SteelHastelloyHastelloy

* 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

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”.

Applications