Emerson Enardo DFA 7236 Instruction Manual

Instruction Manual
D104263X012
March 2018
Model DFA 7236
Detonation Flame Arrestor

Table of Contents

Introduction ............................................................................1
Principle of Operation ............................................................2
Specifications ........................................................................2
Factors Affecting Flame Arrestor Performance ......................2
Installation .............................................................................4
Piping Expansions and Reductions Adjacent to
Detonation Flame Arrestor.....................................................4
Maintenance ..........................................................................6
Element Assembly, Disassembly and
Reassembly Instructions .......................................................6
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,
LLC (Emerson) 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 shall install or service the
detonation flame arrestor.

Introduction

Scope of the Manual
This Instruction Manual provides instructions for
installation, startup and maintenance information for the
Model DFA-7236 detonation flame arrestor.
Model DFA 7236
Figure 1. Typical Model DFA-7236
Detonation Flame Arrestor
Product Description
The DFA Series detonation flame arrestor represents the
best value in flame arrestor protection. The detonation flame
arrestor provides protection against flame propagation in piping
systems that are manifolded or have long run-up distances.
These are typically used for extended pipe length or multiple
pipe bend configurations to stop high pressures and flame
velocities with detonations and overdriven detonations. It
also stops confined and unconfined, low and high-pressure
deflagration. The design is unique in the ability to provide large
flame channels which requires less frequent maintenance and
greater ease in cleaning when service is required, translating
to less down time. DFA Series detonation flame arrestors are
bi-directional and proven to stop an ignited flammable vapor
mixture approaching from either direction that can be travelling
at subsonic or supersonic velocities. The element assembly
offers maximum flow to pressure drop characteristics enhancing
the value of the flame arrestor in any system.
The DFA Series is designed with flanged connections. The
arrestor provides the option of the removal of the flame cell
element assembly for cleaning and replacement with the
arrestor removed from the ping.