DR/ES

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

Features

Reduced Number of FLAMEFILTER® Discs

low number of FLAMEFILTER® discs due to technology

Fastest Disassembly and Assembly

of single FLAMEFILTER®

Modular Design

allows replacement and cleaning of single FLAMEFILTER®

Angle Bodied

saves pipe elbows

Extended Application Range

for elevated operating temperatures and pressures

Spare Parts

cost-effective flame arrester / spare parts

Low Costs

low operating and lifecycle costs

Function and Description

Maintenance and Cost Advantages

The PROTEGO® DR/ES has been used for decades in industrial plant construction because its right angle design offers advantages towards and costs in comparison to most straight designs.

Main component - PROTEGO® flame arrester

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

Many Individual Certifications

The standard design is approved at an up to +60°C / 140°F and an absolute up to 1.2 bar / 17.4 psi. 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.

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

DN	25 / 1"	32 / 1¼“	40 / 1½“	50 / 2"	65 / 2½“	80 / 3“	100 / 4“	125 / 5"	150 / 6"	200 / 8"
a	125 / 4.92	125 / 4.92	153 / 6.02	155 / 6.10	198 / 7.80	200 / 7.87	250 / 9.84	332 / 13.07	335 / 13.19	425 / 16.73
b	140 / 5.51	140 / 5.51	183 / 7.20	185 / 7.28	223 / 8.78	225 / 8.86	290 / 11.42	357 / 14.06	360 / 14.07	505 / 19.88
c	210 / 8.27	210 / 8.27	290 / 11.42	290 / 11.42	365 / 14.37	365 / 14.37	415 / 16.34	535 / 21.06	535 / 21.06	810 / 31.89
c1	285 / 11.22	285 / 11.22	395 / 15.55	395 / 15.55	500 / 19.69	500 / 19.69	595 / 23.43	750 / 29.53	750 / 29.53	1230 / 48.43
d	150 / 5.91	150 / 5.91	210 / 8.27	210 / 8.27	275 / 10.83	275 / 10.83	325 / 12.80	460 / 18.11	460 / 18.11	620 / 24.41
e	495 / 19.49	495 / 19.49	600 / 23.62	600 / 23.62	705 / 27.76	705 / 27.76	795 / 31.30	950 / 37.40	950 / 37.40	1435 / 56.50

Dimensions in mm / inches

Selection of explosion group

MESG	Expl. Gr. (IEC / CEN)	Gas Group (NEC)
> 0,90 mm	IIA	D
≥ 0,65 mm	IIB3	C

Special approvals upon request

Selection of max. operating pressure

Expl. Gr.	DN	25 / 1"	32 / 1¼"	40 / 1½"	50 / 2"	65 / 2½"	80 / 3"	100 / 4"	125 / 5"	150 / 6"	200 / 8“
IIA	Pmax	4,0 / 58.0	4,0 / 58.0	4,0 / 58.0	4,0 / 58.0	2,9 / 42.1	2,9 / 42.1	2,0 / 29.0	2,0 / 29.0	2,0 / 29.0	1,2 / 17.4
IIB3	Pmax	3,0 / 43.5	3,0 / 43.5	2,0 / 29.0	2,0 / 29.0	2,0 / 29.0	2,0 / 29.0	1,5 / 21.7	1,4 / 20.3	1,4 / 20.3	1,1 / 20.3

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

Specification of max. operating temperature

≤ 60°C / 140°F	Tmaximum 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.

other connections upon request

Design Types and Specifications

There are four different designs available:

Basic design of the DR/ES- – - –

In-line detonation flame arrester with * as additional protection against DR/ES- T - –

In-line detonation flame arrester with heating jacketDR/ES- H - –

In-line detonation flame arrester with integrated temperature sensor* against short time burning and heating jacketDR/ES- H - T

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

Material selection for housing

Design	B	C	D
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.	Steel	Stainless Steel	Hastelloy
Heating jacket (DR / ES-H-(T)-...)	Steel	Stainless Steel	Stainless Steel
Cover with shock absorber	Steel	Stainless Steel	Hastelloy
O-Ring	FPM*	PTFE	PTFE
Flame arrester unit Flame arrester unit Flame arrester casing with FLAMEFILTER® set.	A	C, D	E

* 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. .

Special materials upon request

Material combinations of flame arrester unit

Design	A	C	D	E
FLAMEFILTER^® cage	Steel	Stainless Steel	Stainless Steel	Hastelloy
FLAMEFILTER^®*	Stainless Steel	Stainless Steel	Hastelloy	Hastelloy
Spacer Spacer The spacer is a component that is generally used in a PROTEGO® flame arrester as a spacer within the FLAMEFILTER® se	Stainless Steel	Stainless Steel	Hastelloy	Hastelloy

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