LH/AD-T

LH/AD-T

Deflagration Flame Arrester, short time burning-proof, End-of-Line

Function and Description

The PROTEGO® LH/AD-T end-of-line deflagration flame arrester provides protection against flame transmission through atmospheric deflagration and short time burning on the flame arrester element. The device is typically installed on vent lines of vessels and process engineering apparatus which are not pressurized. The device is equipped with a temperature sensor which immediately detects a flame on the FLAMEFILTER® surface. After the flame is detected, a secondary measure, such as inerting or closing of a shut-off valve to block the vapour flow to the device, should activate within 60 seconds and extinguish the flame, so that the plant can operate safely. The device prevents flame transmission from short time burning and atmospheric deflagration into the vessel or plant.

The PROTEGO® LH/AD-T consists of a housing (1), a weather hood (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 devices intended use. Detailing the operating conditions such as the temperature, explosion group and the composition of the fluid, enables PROTEGO® to select the best end-of-line deflagration flame arrester for your application. The PROTEGO® LH/AD 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 operating temperature of up to +60°C / 140°F. Devices with special approval can be obtained for higher temperatures upon request.

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

Features and Advantages

  • Weather hood provides protection against environmental impact (harsh weather conditions, bird nests, etc.)
  • available in sizes DN 50 (2“) – up to DN 800 (32“)
  • easy maintenance
  • available for elevated operating temperatures
  • protection against short time burning and atmospheric deflagration
  • low operating and lifecycle cost
  • cost effective device
  • cost effective spare parts

Dimensions

To select the nominal size (DN), please use the flow capacity charts on the following pages

DN abc*c*
IIB3IIC
50 / 2"100 / 3.94240 / 9.45530 / 20.87550 / 21.65
80 / 3"150 / 5.91295 / 11.61560 / 22.05580 / 22.83
100 / 4"200 / 7.87350 / 13.78585 / 23.03605 / 23.82
150 / 6"300 / 11.81600 / 23.62630 / 24.80655 / 25.79
200 / 8"300 / 11.81600 / 23.62630 / 24.80655 / 25.79
250 / 10"400 / 15.75800 / 31.50750 / 29.53770 / 30.31
300 / 12"400 / 15.75800 / 31.50740 / 29.13760 / 29.92
350 / 14"600 / 23.621000 / 39.37800 / 31.50820 / 32.28
400 / 16"600 / 23.621000 / 39.37790 / 31.10815 / 32.09
500 / 20"700 / 27.561200 / 47.24810 / 31.89835 / 32.87
600 / 24"800 / 31.501200 / 47.24935 / 36.81960 / 37.80
700 / 28"1000 / 39.371500 / 59.06975 / 38.39995 / 39.17
800 / 32"1200 / 47.241700 / 66.931015 / 39.961035 / 40.75
DN abc*c*
IIB3IIC
50 / 2"100 / 3.94240 / 9.45530 / 20.87550 / 21.65
80 / 3"150 / 5.91295 / 11.61560 / 22.05580 / 22.83
100 / 4"200 / 7.87350 / 13.78585 / 23.03605 / 23.82
150 / 6"300 / 11.81600 / 23.62630 / 24.80655 / 25.79
200 / 8"300 / 11.81600 / 23.62630 / 24.80655 / 25.79
250 / 10"400 / 15.75800 / 31.50750 / 29.53770 / 30.31
300 / 12"400 / 15.75800 / 31.50740 / 29.13760 / 29.92
350 / 14"600 / 23.621000 / 39.37800 / 31.50820 / 32.28
400 / 16"600 / 23.621000 / 39.37790 / 31.10815 / 32.09
500 / 20"700 / 27.561200 / 47.24810 / 31.89835 / 32.87
600 / 24"800 / 31.501200 / 47.24935 / 36.81960 / 37.80
700 / 28"1000 / 39.371500 / 59.06975 / 38.39995 / 39.17
800 / 32"1200 / 47.241700 / 66.931015 / 39.961035 / 40.75

Dimensions in mm / inches

* c are reference values. Exact measures depend on the flange connection.

LH/AD-T

Material selection for housing

DesignAB
HousingSteelStainless Steel
Weather Hood

Stainless Steel

Stainless Steel
Protection screenStainless SteelStainless Steel
Flame arrester unitA, BB
DesignAB
HousingSteelStainless Steel
Weather Hood

Stainless Steel

Stainless Steel
Protection screenStainless SteelStainless Steel
Flame arrester unitA, BB

Special materials upon request

Material combinations of flame arrester unit

DesignAB
FLAMEFILTER® cageSteelStainless Steel
FLAMEFILTER®Stainless SteelStainless Steel
DesignAB
FLAMEFILTER® cageSteelStainless Steel
FLAMEFILTER®Stainless SteelStainless Steel

Special materials upon request

LH/AD-T

Selection of explosion group

MESGExpl. Gr. (IEC / CEN)Gas Group (NEC)
≥ 0,65 mmIIB3C
< 0,5 mmIICB
MESGExpl. Gr. (IEC / CEN)Gas Group (NEC)
≥ 0,65 mmIIB3C
< 0,5 mmIICB

Special approvals upon request

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 B1
ASME B16.5; 150 lbs RFSF
EN 1092-1; Form B1
ASME B16.5; 150 lbs RFSF

other types upon request

Design Types and Specifications

Following designs are available:

Deflagration flame arrester, end-of-line, basic design

LH/AD-T

Deflagration flame arrester, end-of-line, basic design

LH/AD-T

Special designs available on request

LH/AD-T

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”.

LH/AD-T
LH/AD-T