DA-UB

In-Line Detonation Flame Arresterfor unstable and stable detonations and deflagrations in a straight through design with a shock tube, bidirectional

Features

Optimized Performance

due to the patented Shock Wave Guide Tube Effect (SWGTE)

Use of Patented Shock Wave Guide Tube Effect (SWGTE)

low number of FLAMEFILTER® discs due to the patented Shock Wave Guide Tube Effect (SWGTE)

Modular Design

allows replacement and cleaning of single FLAMEFILTER®

Differnt Series

allow increase of FLAMEFILTER® size for given flange connection resulting in lower pressure drop across the

Easy Maintenance

without disassembling of the FLAMEFILTER®

Extended Application Range

for elevated operating temperatures and pressures

Bi-Directional Flame Transmission

proof design

Temperature Sensors Possible

use of temperature sensors for G 1½ and G 2 is possible

Spare Parts

cost-effective flame arrester / spare parts

Low Costs

low operating and lifecycle costs

Function and Description

In-line detonation flame arresters with Shock Guide Tube Effect

The type PROTEGO® DA-UB in-line are the newest generation of . Based on fluid dynamic and -dynamic calculations, as well as decades of field tests, a line was developed that offers minimum pressure loss and maximum safety. The device uses the Shock Wave Guide Tube Effect (SWGTE) to separate the flame front and shock wave. The result is an without a classic , and the use of flame-extinguishing elements is minimized.

Main component - PROTEGO® flame arrester

The devices are symmetrical and offer bi-directional flame arresting for deflagrations and stable and unstable detonations. The arrester essentially consists of two parts with an integrated shock tube (1) and the (2) in the center. The PROTEGO® flame arrester unit is modular and consists of several FLAMEFILTER® discs (3) and spacers firmly held in a . The number of FLAMEFILTER® discs and their gap size depends on the arrester’s intended use.

For Explosion groups IIA to IIB3

By specifying the operating conditions, such as the temperature, pressure, explosion group, and the composition of the fluid, the optimum detonation arrester can be selected from a series of approved devices. PROTEGO® DA-UB flame arresters are available for explosion groups IIA to IIB3 (NEC group D to C MESG ≥ 0.65 mm).

Many Individual Certifications

The standard design can be used at an of up to +60°C / 140°F and an absolute up to 1.1 bar / 15.9 psi. Devices with special approval for higher temperatures and pressures (see table 3) are available 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 nominal width/ 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. (NG/DN) - combination, please use the flow capacity charts on the following pages
Additional nominal width/nominal size (NG/DN) - combinations for improved flow capacity upon request

NG		150 / 6"	150 / 6"	200 / 8"	300 / 12"	400 / 16"	500 / 20"	600 / 24"	700 / 28"	800 / 32"	1400 / 56"
DN		≤ 50 / 2"	65, 80 / 2 ½“, 3	≤100 / 4"	≤150 / 6"	≤ 200 / 8"	≤ 250 / 10"	≤ 300 / 12"	≤ 350 / 14"	≤ 400 / 16"	≤ 600 / 24"
a		285 / 11.22	285 / 11.22	340 / 13.39	445 / 17.52	565 / 22.24	670 / 26.38	780 / 30.71	895 / 35.24	1015 / 39.96	1675 / 65.94
b	IIA -P1,1					700 / 27.56	800 / 31.50	1000 / 39.37	1200 / 47.24	1400 / 55.12	2200 / 86.61
	IIA -P1,2	388 / 15.28	388 / 15.28	488 / 19.21	626 / 24.65
	IIB3-P1,1			500 / 19.69	638 / 25.12	724 / 28.50	824 / 32.44	1000 / 39.37	1200 / 47.24	1400 / 55.12
	IIB3-P1,2	388 / 15.28	388 / 15.28
c		500 / 19.69	500 / 19.69	520 / 20.47	570 / 22.44	620 / 24.41	670 / 26.38	720 / 28.35	770 / 30.31	820 / 32.28	1060 / 41.73

Dimensions in mm / inches

Selection of explosion group

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

Special approvals upon request

Selection of max. operating pressure

Expl. Gr.	DN	50 / 2"	80 / 3"	100 / 4"	150 / 6"	200 / 8"	250 / 10"	300 / 12"	350 / 14"	400 / 16"	600 / 24"
	NG	150 / 6''	150 / 6''	200 / 8''	300 / 12''	400 / 16''	500 / 20''	600 / 24''	700 / 28''	800 / 32''	1400 / 56''
IIA	Pmax	1,8 / 26.1	1,8 / 26.1	1,6 / 23.2	1,6 / 23.2	1,1 / 15.9	1,1 / 15.9	1,1b / 15.9	1,1 / 15.9	1,1 / 15.9	1,6 / 23.2
IIB3	Pmax	1,5 / 21.7	1,5 / 21.7	1,5 / 21.7	1,5 / 21.7	1,1 / 15.9	1,1 / 15.9	1,1 / 15.9	1,1 / 15.9	1,1 / 15.9

Pmax = maximum allowable operating pressure in bar / psi absolute, higher operating pressure upon request in-between size up to Pmax 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 detonation arresterDA-UB- – - –

In-line detonation flame arrester with * as additional protection against DA-UB- T - –

arrester with two integrated temperature sensors* as additional protection against short time burning from both sidesDA-UB- TB - –

In-line detonation flame arrester with heating jacketDA-UB- H -

Additional special arresters upon request
*Resistance thermometer for device group II, category (1) 2 (GII cat. (1) 2)

Material selection for housing

Design	A	B	C
Housing	Steel	Stainless Steel	Hastelloy
Heating jacket (DA-UB-(T)-H-...)	Steel	Stainless Steel	Stainless Steel
Gasket	PTFE	PTFE	PTFE
Flame arrester unit Flame arrester unit Flame arrester casing with FLAMEFILTER® set.	A	B, C	D

The housing is also available 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	B	C	D
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.

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