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Instruction Manual
D103585X012
February 2021
EN-DFA Series Detonation Flame Arrestor
(EN ISO 16852 Certified)
Table of Contents
Introduction .................................................................. 1
Product Description .................................................... 2
Specifications .............................................................. 2
Principle of Operation .................................................. 3
Factors Affecting Flame Arrestor Performance ............ 5
Installation ................................................................... 8
Maintenance .............................................................. 10
Recommended Spare Parts ...................................... 12
Parts Ordering ........................................................... 12
▲
WARNING
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion,
fire and/or chemical contamination
causing property damage and personal
injury or death.
Enardo™ detonation flame arrestor must
be installed, operated and maintained
in accordance with federal, state and
local codes, rules and regulations
and Emerson Process Management
Regulator Technologies Tulsa,
(Emerson) LLC instructions.
Failure to correct trouble could result in
a hazardous condition. Call a qualified
service person to service the unit.
Installation, operation and maintenance
procedures performed by unqualified
person may result in improper adjustment
and unsafe operation. Either condition may
result in equipment damage or personal
injury. Only a qualified person must install
or service the detonation flame arrestor.
EN-DFA Series
Figure 1. Typical EN-DFA Series Detonation Flame Arrestor
Introduction
Scope of the Manual
This Instruction Manual provides instructions for
installation, startup, maintenance and parts ordering
information for the EN-DFA Series detonation
flame arrestor.
Flame Arrestor Classification
The flame arrestors within the scope of this
document have been tested and certified as unstable
detonation flame arrestors and are therefore suitable
for deflagrations, stable detonations and unstable
detonations, as defined by EN ISO 16852:2016,
propagating along pipe into connecting pipework.
This is the highest performance rating available for a
detonation arrestor and it exceeds the performance
rating of an arrestor certified for stable detonations and
deflagrations only.
Detonation flame arrestors may be used for open and
closed pipe work on the unprotected ("hot") side.
Related Manuals for Emerson EN-DFA Series
Summary of Contents for Emerson EN-DFA Series
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Page 1: Table Of Contents
Principle of Operation ..........3 Factors Affecting Flame Arrestor Performance .... 5 Installation ..............8 Maintenance .............. 10 Recommended Spare Parts ........12 Figure 1. Typical EN-DFA Series Detonation Flame Arrestor Parts Ordering ............12 ▲ WARNING Introduction Failure to follow these instructions or... -
Page 2: Product Description
EN ISO 16852:2016 See Table 5 1. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded. Table 1. EN-DFA Series Detonation Flame Arrestor Available Construction (ATEX Approved) FLANGE SIZE HOUSING SIZE... -
Page 3: Principle Of Operation
5 = Protective coating 6 = Special feature Figure 3. EN-DFA Series Detonation Flame Arrestor Available Constructions and Model Numbering System The EN-DFA Series is designed with flanged connections, Flame arrestor use shall be limited to gas-air mixtures and the arrestor provides the option of the removal of the... - Page 4 EN-DFA Series WARNING Flame Arrestors have installation and application limits Type designation in accordance with EN ISO 16852:2016 /D = n/a = 1 min DET 2 BC: b; t Ex. G IIA = 60°C = 122.3 kPa (absolute) WARNING LABEL OF EN-DFA-0402/IIA THROUGH EN-DFA-1206/IIA (SEE TABLE 2)
- Page 5 EN-DFA Series Table 2. Warning Label Information INFORMATION DESCRIPTION Indicates product is a Detonation Flame Arrestor Tested for unstable detonation without restriction /D = n/a The ratio of pipe length (between the potential ignition source and the flame arrestor) and pipe diameter. It indicates unlimited...
- Page 6 EN-DFA Series Table 6. Temperature Sensor Safety Specifications TECHNICAL DATA THERMOCOUPLE Design Type Standard with thermowell Standard without thermowell Model 185 03J1 Code 0185 thermocouple (IEC 584 Class 1) without thermowell Manufacturer Emerson Rosemount Emerson Rosemount FM12ATEX0065X FM12ATEX0065X EC-Type Approval Certificate ATEX: EN 60079-0:2012+A11:2013;...
- Page 7 Additional external safety equipment If the user requests the addition of temperature is required to ensure appropriate sensors by Emerson, they will either be installed and corrective measures are taken within shipped threaded into the appropriate instrumentation 30 seconds to protect the system if an ports in the flame arrestor end sections or shipped abnormal temperature is detected.
- Page 8 (“hot”) side of the flame arrestor. Model EN-DFA Table 6, particularly as the EN-DFA Series is rated for detonation flame arrestors are bi-directional, so if a short time burning.
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Page 9: Installation
Flow Direction flame speeds, higher flame temperatures and higher flame front pressures than would occur in normal This EN-DFA Series is bi-directional and can be installed flow conditions. Obstructions in protected side piping either vertically or horizontally. Consideration should can cause reflective pressures that might inhibit the... -
Page 10: Maintenance
EN-DFA Series These lugs are not intended for lifting a length of pipe at least 120 pipe diameters must be the entire unit during installation. installed between the detonation flame arrestor and Damage to the detonation flame arrestor the expansion. A pipe diameter is considered as the may result from improper lifting. - Page 11 Note △ CAUTION Under no circumstance shall any other screens not provided by Emerson be used Excessive or uneven torque can cause in this assembly. Failure to use the correct permanent damage to gaskets screens may lead to arrestor failure.
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Page 12: Recommended Spare Parts
Technologies, Inc. All rights reserved. 02/21. Emerson Automation Solutions The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. Enardo™ is a mark owned by Regulator Technologies Tulsa, LLC, a...