DR-UN

Name: DR-UN
Brand: PROTEGO
SKU: prod10068752205601

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

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Features

Fastest Disassembly and Assembly

of Single FLAMEFILTER®

Modular Design

Allows Replacement and Cleaning of Single FLAMEFILTER®

Spare Parts

Cost-Effective Spare Parts

Use of Patented Shock Wave Guide Tube Effect (SWGTE)

Low Number of FLAMEFILTER® Discs Due to the Patented Shock Wave Guide Tube Effect (SWGTE)

Low Costs

Low Operating and Lifecycle Costs

Easy Maintenance

Without Disassembling of the FLAMEFILTER®

Function and Description

Secure Potentially Explosive Plants Against Pipe Deflagrations and Stable Detonations

The PROTEGO® DR-UN In-Line Detonation Flame Arrester are used to secure potentially explosive plants against pipe deflagrations and stable detonations. In the right-angle design and with the PROTEGO® DR/U identical dimensions, the PROTEGO® DR-UN offers considerable maintenance and cost benefits. Once a detonation enters the , energy is absorbed from the detonation shock wave by the integrated (1) before the flame is extinguished in the narrow gaps of the FLAMEFILTER® (3).

For Explosion Groups IIA to IIB3

The PROTEGO® Flame Arrester Unit (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 (explosion group, pressure, temperature). This device is approved for explosion groups from IIA to IIB3 (NEC group D to C MESG ≥ 0.65 mm). The standard design is approved at an up to +60°C / 140°F and an absolute up to 1.2 bar / 17.4 psi. EU conformity according to the currently valid ATEX directive.

Product Data

Dimensions

To select the nominal size Diamètre nominal 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 / 1 ¼"	40 / 1 ½"	50 / 2"	65 / 2 ½"	80 / 3"	100 / 4"	150 / 6"	200 / 8“
a	100 / 3.94	125 / 4.92	140 / 5.51	150 / 5.91	160 / 6.30	185 / 7.28	250 / 9.84	300 / 11.81	350 / 13.78
b	125 / 4.92	150 / 5.91	160 / 6.30	165 / 6.49	185 / 7.28	195 / 7.68	250 / 9.84	300 / 11.81	350 / 13.78
c	189 / 7.44	214 / 8.43	259 / 10.2	264 / 10.39	307 / 12.09	317 / 12.08	374 / 14.72	464 / 18.27	707 / 27.83
c1	280 / 11.02	310 / 12.20	370 / 14.57	375 / 14.76	485 / 19.09	495 / 19.49	585 / 23.03	705 / 27.75	1170 / 46.06
d	149 / 5.87	149 / 5.87	210 / 8.27	210 / 8.27	275 / 10.83	275 / 10.83	325 / 12.80	460 / 18.11	620 / 24.41
e	-	-	-	-	326 / 12.83	336 / 13.23	403 / 15.87	475 / 18.70	707 / 27.83
f	-	-	168 / 6.61	168 / 6.61	-	-	-	-	-
g	-	-	138 / 5.43	143 / 5.63	-	-	-	-	-
h	-	-	50 / 1.97	50 / 1.97	-	-	-	-	-
xy	475 / 18.70	500 / 19.69	570 / 22.44	580 / 22.83	690 / 27.17	700 / 27.56	770 / 30.31	905 / 35.63	1305 / 51.38

Dimensions in mm / inches

* upon request

Selection of explosion group

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

Selection of max. operating pressure

Expl. Gr.	DN	25/ 1"	32 / 1 ¼"	40 / 1 ½"	50 / 2"	65 / 2½"	80 / 3"	100 / 4"	150 / 6"	200 / 8“
IIA	Pmax	-	-	-	2,0 / 29.0	2,0 / 29.0	2,0 / 29.0	2,0 / 29.0	1,2 / 17.4	1,6 / 23.2
IIB3	Pmax	1,4 / 20.3	1,4 / 20.3	1,4 / 20.3	1,4 / 20.3	1, 2 / 17.4	1, 2 / 17.4	1,2 / 17.4	1,2 / 17.4	1,1 / 15.9

Pmax = maximum allowable operating pressure in bar / psi (absolute)

Specification of max. operating temperature

≤ 60°C / 140°F

Tmaximum allowable operating temperature in °C

Material selection for housing

Design	B	C
Housing	Steel	Stainless Steel
Cover with shock absorber	Steel	Stainless Steel
O-Ring	FPM	PTFE
Flame arrester unit Flame arrester unit Flame arrester casing with FLAMEFILTER® set.	A	C, D

Special materials upon request

Material combinations of flame arrester unit

Design	A	C	D
FLAMEFILTER^® cage	Steel	Stainless Steel	Stainless Steel
FLAMEFILTER^®*	Stainless Steel	Stainless Steel	Hastelloy
Spacer	Stainless Steel	Stainless Steel	Hastelloy

* Other FLAMEFILTER® materials upon request

Special materials upon request

Flange connection type

EN 1092-1; Form B1

ASME B16.5 CL 150 R.F.

other connections 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”.