DR/EU

DR/EU

In-Line Detonation Flame Arrester

for unstable and stable detonations and deflagrations in right angle design with a shock absorber, unidirectional

Function and Description

The PROTEGO® DR/EU series of in-line detonation flame arresters represents a further development of PROTEGO® flame arresters DR/ES used successfully for decades in industry. The device protects against deflagrations, stable and unstable detonations. The classic right angle design offers considerable cost and maintenance advantages in comparison to a straight through design.

Once a detonation 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 (2) consists of several FLAMEFILTER®discs and spacers firmly held in the FLAMEFILTER ® cage (4). The gap size and number of FLAMEFILTER® discs are determined by the operating data parameters of the mixture flowing in the line (explosion group, pressure, temperature). This device is available explosion groups from IIA to IIB3 (NEC group D to C MESG ≥ 0.65 mm).

The standard design can be used up to an operating temperature of +60°C / 140°F and an absolute operating pressure acc. to table 3. Numerous special approvals can be obtained for higher temperatures and pressures upon request.

Type-approved in accordance with the current ATEX Directive and EN ISO 16852 as well as other international standards..

Features and Advantages

  • minimum number of FLAMEFILTER® discs due to the effective shock absorber
  • quick removal and installation of the complete PROTEGO® flame arrester unit and of the FLAMEFILTER® discs in the cage
  • modular flame arrester unit enables each individual FLAMEFILTER ® discs to be replaced and cleaned
  • provides protection from deflagration as well as from stable and unstable detonation
  • the right angle design saves pipe elbows
  • extended application range for higher operating temperatures and pressures
  • minimum pressure loss and hence low operating and lifecycle costs
  • cost efficient spare parts

Dimensions

To select the nominal size (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
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

DR/EU

Material selection for housing

Design  BCD 
HousingCarbon 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
Design  BCD 
HousingCarbon 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.

Material combinations of flame arrester unit

Design ACDE
FLAMEFILTER® cageSteelStainless SteelStainless SteelHastelloy
FLAMEFILTER®*Stainless SteelStainless SteelHastelloyHastelloy
SpacerStainless SteelStainless SteelHastelloyHastelloy
Design ACDE
FLAMEFILTER® cageSteelStainless SteelStainless SteelHastelloy
FLAMEFILTER®*Stainless SteelStainless SteelHastelloyHastelloy
SpacerStainless 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

DR/EU

Selection of explosion group

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

Specification of max. operating temperature

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

higher operating temperatures upon request

Flange connection type

EN 1092-1; Form B1other connections upon request
ASME B16.5; 150 lbs RFSF
EN 1092-1; Form B1other connections upon request
ASME B16.5; 150 lbs RFSF

Design Types and Specifications

There are four different designs available:

Basic design of the detonation arrester

DR/EU- – –

In-line detonation flame arrester with integrated temperature sensor* as additional protection against short time burning of one side

DR/EU- T –

In-line detonation flame arrester with heating jacket

DR/EU- H –

in-line detonation flame arrester with integrated temperature sensor* and heating jacket

DR/EU- H - T

Basic design of the detonation arrester

DR/EU- – –

In-line detonation flame arrester with integrated temperature sensor* as additional protection against short time burning of one side

DR/EU- T –

In-line detonation flame arrester with heating jacket

DR/EU- H –

in-line detonation flame arrester with integrated temperature sensor* and heating jacket

DR/EU- H - T

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

DR/EU

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). Conversion to other densities and temperatures refer to Vol. 1: “Technical Fundamentals”.

DR/EU
DR/EU