LH/AD-T
Deflagration Flame Arrester, short time burning-proof, End-of-Line
Features
Comprehensive Weather Protection
Weather Hood With Protection Screen Protects the PROTEGO® Flame Arrester Unit Against Environmental Impact, Such as Nesting Animals and Weather Conditions
Various Sizes
Available for DN 50/2"– bis DN 800/32"– Pipes
Easy Maintenance
Extraordinarily Easy to Service
Extended Application Range
for Elevated Operating Temperatures and Pressures
Low Costs
Low Operating and Lifecycle Costs
Spare Parts
Cost-Effective Spare Parts
Saftey
Provides Protection Against Atmospheric Deflagrations, Short-Time Burning
Function and Description
Protection Against Atmospheric Deflagrations
The
Pressure/vacuum relief valve
Pressure/vacuum relief valve is an umbrella term that includes pressure or vacuum relief valve as well as pressure and vacuum relief valve.
PROTEGO® LH/AD-T End-of-Line
Deflagration Flame Arrester
Deflagration flame arrester
Flame arrester designed to prevent the transmission of a deflagration. It can be an end-of-line flame arrester or an in-line flame arrester.
provides protection against flame transmission through atmospheric
deflagration
Deflagration
Explosion propagating at subsonic velocity (EN 1127-1:1997).
and
short time burning
Short time burning
Stabilized burning for a specific time.
on the
flame arrester
Flame arrester
Device fitted to the opening of an enclosure, or to the connecting pipe work of a system of enclosures, and whose intended function is to allow flow but prevent the transmission of a flame.
element. 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.
is typically installed on vent lines of vessels and plant
equipment
Equipment
Machines, appliances, fixed or mobile devices, control parts and accessories, and warning and prevention systems, whether separate or combined, intended for the generation, transfer, storage, measurement, control, and conversion of energy, and for the processing of materials, which have their own potential source of ignition and may cause an explosion.
which are not pressurized. The device is equipped with a
temperature sensor
Temperature sensor
Temperature sensor for monitoring the temperature.
which immediately detects a flame on the FLAMEFILTER® surface.
Protection Against Short-Time Burning
After the flame is detected, a secondary measure, such as
inerting
Inerting
Replacing atmospheric oxygen in a plant with a non-reactive, non-flammable gas to prevent flame propagation in the atmosphere of a plant.
or closing of a
shut-off valve
Shut-off valve
A shut-off valve is used for controlled opening and closing of pipes. In closed position, the valve does not allow flow in any direction.
to block the vapor flow to the device, should activate within 60 seconds and extinguish the flame so that the system can operate safely. The device prevents flame transmission from short time burning and atmospheric deflagration into the
vessel
Vessel
Container or structural envelope in which materials are processed, treated or stored.
or plant.
Main Component – PROTEGO® Flame Arrester Unit
The PROTEGO® LH/AD-T consists of the
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.
(1), a
weather hood
Weather hood
A weather hood is a cover to protect the internal components of a device from environmental influences.
(2), and the PROTEGO® Flame Arrester Unit (3). The device is equipped with a metal weather hood. The FLAMEFILTER® (4) gap size depends on the device’s intended use. Specifying the operating conditions, such as the temperature,
explosion
Explosion
Abrupt oxidation or decomposition reaction producing an increase in temperature, pressure, or in both simultaneously.
group, and the composition of the fluid, enables PROTEGO® to select the best End-of-Line Deflagration Flame Arrester for your application.
For Explosion Groups IIA to IIC
The PROTEGO® LH/AD-T Series End-of-Line Deflagration Flame Arrester is available for substances from explosion groups IIA to IIC (NEC groups D to B).
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. Devices with special approval for higher temperatures are available upon request.
EU conformity according to the currently valid ATEX directive. Approvals according to other national/international regulations on request.
Product Data
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 | a | b | c* | c* |
| IIB3 | IIC | |||
| 50 / 2" | 100 / 3.94 | 240 / 9.45 | 530 / 20.87 | 550 / 21.65 |
| 80 / 3" | 150 / 5.91 | 295 / 11.61 | 560 / 22.05 | 580 / 22.83 |
| 100 / 4" | 200 / 7.87 | 350 / 13.78 | 585 / 23.03 | 605 / 23.82 |
| 150 / 6" | 300 / 11.81 | 600 / 23.62 | 630 / 24.80 | 655 / 25.79 |
| 200 / 8" | 300 / 11.81 | 600 / 23.62 | 630 / 24.80 | 655 / 25.79 |
| 250 / 10" | 400 / 15.75 | 800 / 31.50 | 750 / 29.53 | 770 / 30.31 |
| 300 / 12" | 400 / 15.75 | 800 / 31.50 | 740 / 29.13 | 760 / 29.92 |
| 350 / 14" | 600 / 23.62 | 1000 / 39.37 | 800 / 31.50 | 820 / 32.28 |
| 400 / 16" | 600 / 23.62 | 1000 / 39.37 | 790 / 31.10 | 815 / 32.09 |
| 500 / 20" | 700 / 27.56 | 1200 / 47.24 | 810 / 31.89 | 835 / 32.87 |
| 600 / 24" | 800 / 31.50 | 1200 / 47.24 | 935 / 36.81 | 960 / 37.80 |
| 700 / 28" | 1000 / 39.37 | 1500 / 59.06 | 975 / 38.39 | 995 / 39.17 |
| 800 / 32" | 1200 / 47.24 | 1700 / 66.93 | 1015 / 39.96 | 1035 / 40.75 |
Dimensions in mm / inches
* c are reference values. Exact measures depend on the flange connection.
Selection of explosion group
| MESG | Expl. Gr. (IEC / CEN) | Gas Group (NEC) |
| ≥ 0,65 mm | IIB3 | C |
| < 0,5 mm | IIC | B |
Special approvals upon request
Specification of max. operating temperature
| ≤ 60°C / 140°F | Tmaximum allowable operating temperature in °C |
| - | Designation |
higher operating temperatures upon request
Material selection for housing
| Design | A | B |
| Housing | Steel | Stainless Steel |
| Weather Hood | Stainless Steel | Stainless Steel |
| Protection screen | Stainless Steel | Stainless Steel |
| Flame arrester unit Flame arrester unit Flame arrester casing with FLAMEFILTER® set. | A, B | B |
Special materials upon request
Material combinations of flame arrester unit
| Design | A | B |
| FLAMEFILTER® cage | Steel | Stainless Steel |
| FLAMEFILTER® | Stainless Steel | Stainless Steel |
Special materials upon request
Flange connection type
| EN 1092-1; Form B1 |
| ASME B16.5 CL 150 R.F. |
other types 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”.
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