Emerson ENARDO 8 Series User manual

D103831X012
Instruction Manual
March 2015
8 Series
www.enardo.com
Figure 1. 8 Series High Pressure Deagration Flame Arrestor
8 Series High Pressure Deagration
Flame Arrestor
Table of Contents
Introduction..................................................................1
Specifications .............................................................. 2
Principle of Operation.................................................. 3
Factors Affecting Flame Arrestor Performance ........... 4
Installation ...................................................................5
Maintenance................................................................7
Recommended Spare Parts ...................................... 10
Parts Ordering ........................................................... 10
Parts List....................................................................10
WARNING
!
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion,
re and/or chemical contamination
causing property damage and personal
injury or death.
Enardo high pressure deagration ame
arrestors 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.
Call a qualied service person to service
the unit. Installation, operation and
maintenance procedures performed
by unqualied person may result
in improper adjustment and unsafe
operation. Either condition may result in
equipment damage or personal injury.
Only a qualied person shall install
or service the 8 Series high pressure
deagration ame arrestor.
Introduction
Scope of the Manual
This manual provides specications, installation
and maintenance instructions and parts ordering
information for the 8 Series high pressure
deagration ame arrestor.
Product Description
8 Series high pressure deagration ame arrestors is
designed to protect equipment against high velocity
and pressure ame fronts inherent in applications
beyond the performance range of a standard ame
arrestor but not yet to the detonation phase of ame
development and provide an economical alternative
to a detonation arrestor. The 8 Series high pressure
deagration ame arrestor is designed to surpass
standard ame arrestors for applications that
include extended lengths of pipe with one bend,
elevated operating pressures and extended ame
stabilization on the ame cell element. The arrestors
are bi-directional and can stop low, medium and high

8 Series
2
8/- -
Deagration Flame
Arrestor
Housing
Size
Connection
Size
NEC Housing
Material
Element
Material
Connection
Type
Options
E8 if eccentric
conguration
08 = 8 in.
through
48 = 48 in.
02 = 2 in.
through
24 = 24 in.
Gas
Group
C = Carbon Steel
4 = 304 SST
6 = 316 SST
H = Hastelloy®
E = Exotic
4 = 304 SST
6 = 316 SST
H = Hastelloy®
E = Exotic
F = Flat face
ange
R = Raised
face
ange
1 = Drain Plug
2 = Pressure Tap
3 = Temperature
Probe Tap
4 = Miscellaneous
5 = Protective coating
6 = Special feature
B
C
D
Figure 2. 8 Series High Pressure Deagration Flame Arrestor Available Constructions and Model Numbering System
Hastelloy® is a mark owned by Haynes International, Inc.
Specications
The Specications table lists the specications for the 8 Series high pressure deagration ame arrestors.
Specication is stamped on the nameplate attached to the ame arrestor.
Available Construction
See Table 1 and Figure 2
Gas Group
B, C and D
Flange Size and Rating
2 to 24 in. / 50 to 600 mm
CL150 FF and RF
Housing Size
8 to 48 in. / 200 to 1200 mm
1. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.
Temperature Rating of Gaskets(1)
Fiber Gaskets (standard):450°F / 232°C or higher
Pipe Length
See Table 4
Housing Material
Carbon steel, 304 Stainless steel,
316 Stainless steel, Hastelloy®and Exotic
Cell Material
304 Stainless steel, 316 Stainless steel
and Hastelloy®

3
8 Series
pressure deagrations. Enardo utilizes a patented
(US Patent No. 5415233) element assembly that
dampens the high velocities and pressures associated
with deagration and detonations while quenching the
ame front.
Designed with anged connections, this arrestor allows
removal of the ame cell element for easy cleaning
and replacement without removing the arrestor
body from the pipe connection. Standard housing
construction is carbon steel or stainless steel. The
element is available in Stainless steel. Special material
and protective coating are available on request.
Principle of Operation
The high-pressure deagration ame arrestor is
an enhanced version of the standard deagration
ame arrestor, designed to stop ames in the low,
medium, and high pressure deagration states. Flame
arrestor allows gas to pass though it but stops ame
in order to prevent a larger re of explosion. Arrestor
prevents ame by absorbing and dissipating the heat
from ame as it attempts to travel through the spiral
wound crimped ribbon ame cells. These cells allow
maximum ow with maximum protection. See Figure 3.
Table 1. 8 Series High Pressure Deagration Flame Arrestor Available Construction
Figure 3. Flame Arrestor Operation
FLAME STABILIZED ON
ARRESTOR ELEMENT
PIPING
EXPOSED SIDE
FLAME ARRESTOR ELEMENT ABSORBS
AND QUENCHES FLAME FRONT
PROTECTED SIDE
MODEL FLANGE SIZE HOUSING SIZE
In. mm In. mm
80802 2 50 8 200
80803 3 75 8 200
80804 4 100 8 200
81206 6 150 12 300
81608 8 200 16 400
82010 10 250 20 500
82412 12 300 24 600
82814 14 350 28 700
83016 16 400 30 750
83018 18 450 34 850
83620 20 500 36 900
84824 24 600 48 1200

8 Series
4
Factors Affecting Flame
Arrestor Performance
Gas Group
WARNING
!
Methanol is classied by the National
Electrical Code (NEC) as a Group-D
vapor. However, our lab tests indicate
that methanol exhibits characteristics
unlike other Group-D vapors under
certain conditions. We therefore
recommend that an arrestor rated
for Group-C vapors be specied for
methanol service.
The type of gas in the system determines its gas
grouping and therefore predetermines the type of
arrestor element required. The element must be
designed to accommodate the specic gas group that
could possibly ignite and propagate in the system. The
more explosive gases require the ame cell to absorb
the heat more quickly and efciently. The National
Electrical Code (NEC) groups gases into A, B, C, D
and G.M. categories depending on the Maximum
Experimental Safe Gap (MESG) of the gas.
Maximum Experimental Safe Gap
(MESG)
WARNING
!
Verify that the high pressure deagration
ame arrestor being installed has the
appropriate gas group rating for your
process. This information is shown on
the nameplate attached to the element
housing. Do not remove or alter
this nameplate.
The measurement of the maximum gap between two
equatorial anges on a metal sphere that will prevent
a ame from being transmitted from the sphere to the
surrounding ammable mixture. MESG is dependent
on gas composition. The stochiometric mixture (the
ideal air/fuel ratio for the most efcient combustion)
is used to determine the minimum MESG for a
given gas. See Table 2 for the MESG per gas group.
Table 2. Maximum Experimental Safe Gap (MESG)
NATIONAL ELECTRIC CODE (NEC)
MESG
TEST GAS LIST
In. mm
Group B 0.011 0.28 Hydrogen
Group C 0.026 0.65 Ethylene
Group D 0.035 0.90 Propane
G.M. 0.044 1.12 Methane
HIGH PRESSURE DEFLAGRATION FLAME ARRESTORS - ALL SIZES
Gas Group
Maximum Initial Pressure
Endurance Burn Time
psia kPa
D 19.7 136 15 Minutes
C 16.7 115 15 Minutes
B 16.7 115 5 Minutes
Table 3. 8 Series High Pressure Deagration Flame Arrestor Endurance Burn Time

5
8 Series
Table 4. 8 Series High Pressure Deagration Flame Arrestor, For All Sizes Pipe Length Rules
GAS GROUP “B” GAS GROUP “C” GAS GROUP “D”
Maximum length of pipe between
the ame arrestor and the ignition
source with a maximum of one 90°
bend. Multiple bends or any additional
obstructions are not recommended.
15 ft. / 4.5 m. 35 ft. / 10.6 m. 60 ft. / 18 m.
Maximum Initial Operating Pressure
This is the pressure of the system at or near static
ow conditions. High pressure deagration can occur
more easily at higher system operating pressures than
at pressures near atmospheric. Elevated pressures
condense the ignitable gas giving the ame more
matter and energy to release thereby boosting the
ame heat intensity.
Endurance Burn Time
WARNING
!
Unlimited burning should not be allowed
in any ame arrestor, regardless of
its burn time rating. If burning can
occur for a period exceeding 2 minutes
starting at ambient temperature, it is
recommended that a temperature alarm
and shutdown system be installed. All
Enardo High Pressure Deagration
Flame Arrestors are provided with
temperature probe taps for this purpose.
Endurance burn time is the time it takes for a stabilized
ame, at greatest heat saturation conditions, to
heat the arrestor element above the auto-ignition
temperature of the process gas stream resulting in
ame propagation through the arrestor. See Table 3 for
the endurance burn time of each gas group.
Pipe Lengths
Extended lengths of pipe allow the ame to advance
into more severe states of ame propagation such
as high pressure deagration or detonations. High
pressure deagration ame arrestors should be
installed in accordance with Table 4.
Bends and/or Flow Obstructions
CAUTION
For maximum safety, avoid bends
and ow obstructions within 10 pipe
diameters on the protected side of the
ame arrestor.
Bends in piping, pipe expansions and/or contractions,
valves, orice plates or ow obstructing devices of
any kind contribute to turbulent ow. Turbulent ow
enhances mixing of the combustible gases, greatly
increasing the combustion intensity. This can result in
increased ame speeds, higher ame temperatures
and higher ame front pressures than would occur in
normal ow conditions.
Installation
WARNING
!
Always make sure that the system is
at atmospheric pressure and there is
no ignitable gas that could ash when
either installing or maintaining the unit.
Connection
Enardo high pressure deagration ame arrestors
are normally provided with CL150 raised or at face
anges. Other ange such as CL300 are available
upon request. Make sure the companion anges
installed in adjacent piping match the anges on the
high pressure deagration ame arrestors.

8 Series
6
Standard compressed ber gaskets that will
withstand temperatures of 450°F / 232°C or higher
are normally used, but other materials of equal or
higher temperature capability may be used at the
customer’s discretion.
Positioning
CAUTION
The high pressure deagration
ame arrestor is tted with lugs for
lifting the element assembly during
servicing operations. These lugs are
not intended for lifting the entire unit
during installation. Damage to the high
pressure deagration ame arrestor may
result from improper lifting. The units
should be lifted using appropriately
rated Nylon (PA) straps rigged on the
outside of the tension studs.
The arrestor should be positioned such that the
element is accessible for removal. The tension studs
are supplied with jacking nuts on one half of the bolting
circumference. Install the unit so that the jacking nuts
(on the inside of the studs) are positioned on the
opposite side from the direction that the element
assembly will be removed.
Models that have drain plugs are designed for
horizontal installation and should be installed with the
drain plugs aligned at the bottom of the unit. Models
that have pressure taps are designed to allow pressure
gauges to be installed on both sides of the ame cell
assembly to determine blockage. The pressure taps
should be aligned at the top to allow easy viewing
of the gauges. Units that are equipped with optional
internal cleaning systems should be connected to a
source of cleaning media such as water, steam or
other suitable solvent.
Flow Direction
The Enardo high pressure deagration ame arrestor
is bi-directional and can be installed either vertically or
horizontally. Consideration should be given to non-
symmetrical assemblies that include features such
as clean-out ports, temperature monitoring device or
other options that might have a preferred installation
direction to suit the needs of the customer.
Piping Expansions and Reductions
Adjacent to High Pressure Deagration
Flame Arrestors
WARNING
!
No instrument, tubing or other device
whatsoever shall circumvent the high
pressure deagration ame arrestor
in such a manner to allow a ame path
to exist around the ame element of
the arrestor. When instrumentation is
installed in such a manner that it creates
a path circumventing the ame element
of an arrestor, measures must be taken
to prevent passage of ame through the
instrumentation device and/or system.
Instrumentation must be capable
of withstanding the maximum and
minimum pressures and temperatures to
which the device may be exposed and at
a minimum be capable of withstanding
a hydrostatic pressure test of 350 psig /
24 bar.
An Enardo high pressure deagration ame arrestor
may be installed in any vapor control line that is
smaller than or equal to the nominal pipe diameter of
the arrestor’s connection anges.
When it is necessary to increase the diameter of the
piping on the downstream side of the high pressure
deagration ame arrestor, a length of pipe at least
120 pipe diameters must be installed between the
high pressure deagration ame arrestor and the
expansion. A pipe diameter is considered as the
inside diameter of pipe having a nominal size equal
to the high pressure deagration ame arrestor’s
connecting anges.

7
8 Series
Maintenance
WARNING
!
Flame cells must be inspected for
damage immediately following a
deagration and/or stabilized burn.
1. Carefully remove the element assembly from
the arrestor and place it on a soft surface such
as plywood.
2. Inspect the ame cell visually for any signs of
corrosion or other damage.
3. Inspect the ame cell with a calibrated pin gauge
to ensure maximum crimp size openings do not
exceed the following values for their respective
gas group:
• Explosion Group D – 0.062 in. / 1.57 mm
• Explosion Group C – 0.038 in. / 0.965 mm
• Explosion Group B – 0.017 in. / 0.432 mm
4. If any damage is noted, or crimp openings
exceed maximum size allowable, replace the
element assembly.
5. Keep the element openings clean to prevent
loss of efciency in absorbing heat. Remove the
element assembly and clean the elements to
prevent the openings from becoming clogged
with particulate matter. Clean the element with a
suitable cleaning media (solvent, soap, water, or
steam) then blow dry using compressed air. Be
careful not to damage or dent the cell openings
as this would hamper the effectiveness of the unit.
Do not clean the arrestor elements by rodding to
remove blockages, as this practice will damage
the elements and seriously impair the arrestor’s
performance. If the arrestor element cannot be
cleaned satisfactorily, replace it.
6. For best cleaning results, use a high pressure
sprayer with spray wand (1500 to 3000 psig /
103 to 207 bar) to clean the entire element
surface. Hold the spray nozzle perpendicular
to the surface being cleaned to maximize spray
media penetration into the element. Alternately
spray each side of the element surface until clean.
7. The cleaning interval should be governed by the
amount and type of particulate in the system to
which it is installed and must be determined by
the user. To determine the maintenance interval
the user should check the element in the rst few
months of operation to nd how quickly particulate
accumulates in the cells.
8. After cleaning, thoroughly inspect the element for
damage. If damaged, replace it.
Note
Under no circumstance should the
element bank be disassembled from its
shell for cleaning or replacement. The
element section must be replaced as a
complete assembly.
Cleaning of units equipped with this
system may be accomplished in several
ways including periodic cleaning using
manually operated valves, by use of
an automated cycle timing method,
or by having the cleaning operation
initiated whenever the pressure loss
across the arrestor element exceeds a
predetermined value.
Element Assembly, Disassembly and
Reassembly Instructions
WARNING
!
Isolate gas supply and bring system
to atmospheric pressure to prevent
ignitable gas from ashing while
performing maintenance.
1. Loosen all jacking (inside) nuts on tension studs
between conical sections of the ame arrestor.
2. Tighten the inside jacking nuts on the tension
studs forcing the two conical sections apart. When
the two ange faces have separated, remove the
tension studs that do not have inside jacking nuts,
so that the element assembly can be removed.
The inside jacking nuts are installed on all tension
studs that facilitate jacking the unit apart. The
inside jacking nuts are not installed on tension
studs that are taken out, for ease of removal.

8 Series
8
Figure 4. Flange Pattern Tightening Sequence
Table 5. Tightening Steps and Torque Values(1)(2)
TIGHTENING STEPS AND TORQUE (lbf-ft / N•m)
Model Pattern(2) Bolt size, In. Step 1 Step 2 Step 3 Step 4
80802, 80803, 80804 1 3/4-10 Snug 20 / 27 45 / 61
81206 2 7/8-9 Snug 25 / 34 50 / 68
81608 2 1-8 Snug 25 / 34 50 / 68 75 / 102
82010 3 1-1/4-8 Snug 35 / 47 70 / 95 120 / 163
82412 4 1-1/4-8 Snug 35 / 47 70 / 95 120 / 163
82814 5 1-1/4-8 Snug 35 / 47 70 / 95 120 / 163
83016 6 1-1/4-8 Snug 35 / 47 70 / 95 120 / 163
83620 7 1-1/2-8 Snug 50 / 68 120 / 163 170 / 230
1. Using machine oil as lubricant. See Bolt Lubrication section on page 9 and torque correction factors for other lubricants in Table 6.
2. See Figure 4.
PATTERN 1
PATTERN 5 PATTERN 6 PATTERN 7
PATTERN 2 PATTERN 3 PATTERN 4

9
8 Series
DESCRIPTION COEFFICIENT OF FRICTION MULTIPLY TORQUE VALUE IN TABLE 5 BY
Machine Oil f = 0.15 1.00
API SA2 Grease f = 0.12 0.80
Never-Seez®(Ni base) f = 0.11 0.73
Never-Seez®(Cu base) f = 0.10 0.67
Molykote®G-n Paste f = 0.06 0.40
Table 6. Torque Correction Factors for Common Lubricants
Molykote®G-n is a mark owned by Dow Corning Corporation.
Never-Seez® is a mark owned by Bostik, Inc.
CAUTION
Element assemblies are heavy and will
require the use of adequate equipment
and manpower to prevent injury.
3. Thoroughly clean the gasket sealing faces being
careful not to damage the sealing surface. For
reassembly, lightly grease one side of a new
gasket and place it in the machined recess of each
interior ange on the two conical sections.
4. Replace the ame element assembly with a new
assembly or properly cleaned and inspected
existing unit.
5. Loosen the jacking nuts on the tension rods until
the ame cell assembly seats onto the gaskets.
6. Replace all tensioning studs and hand tighten the
outer nuts. Check to be sure that all the jacking
nuts are completely loose and not making contact
with the ange face.
7. Torque the bolts in sequence as shown in
Torquing Instruction.
Torquing Instruction
CAUTION
Excessive or uneven torquing can
cause permanent damage to gaskets
and housing.
Tools/Supplies Required
• Hand operated conventional torque wrench or
power assisted torque wrench appropriate for the
specied torque.
• Socket wrenches of the proper size to t the hex
nuts being tightened
• Molydisulde based lubricating paste,
Molykote®G-n or equivalent
• Brush suitable for applying lubricant to the studs
• Wiping rags necessary for the clean up of
excessive lubricant
Procedure
1. Use studs and nuts that are free of visible
contamination and corrosion.
2. Apply lubricant to the threads of the stud
protruding outboard of the interior anges and
to the face of the hex nuts which will contact
the ange.
3. Assemble the nuts to the studs such that the
amount of thread extending outboard beyond the
nut is approximately equal on both ends.
4. Tighten the nuts to the torque values shown
in Table 5 following the designated sequence,
repeating the sequence as shown. Flange pattern
tightening sequences are shown in Figure 4.
Bolt Lubrication
Lubrication will affect required torque of clean
fasteners in good condition more than any other factor.
In fact, 90% of applied torque goes to overcome
friction while only 10% actually stretches the bolt.
Table 5 assumes that only machine oil is used as a
lubricant. Table 6 shows a list of several common
lubricants and their effect on torque required to stretch
bolts to 50% of their yield strength. Most are available
from local bearing distributors.

8 Series
10
MODEL
PART NUMBER
Standard Gasket
(Compressed Fiber)
High Temperature Gasket
(Graphite Base)
80802, 80803, 80804 7008125 7049223
81206 7008136 7049236
81608 7008107 7049207
82010 7008109 7049209
82412 7008111 7049211
82814 7008113 7049213
83016 7008114 7049214
83620 7008117 7049217
1. Two (2) required per assembly.
Table 7. Part Numbers for Replacement Element Assembly Gaskets(1)
Parts List
Recommended Spare Parts
For installations that require frequent maintenance and
minimum downtime it is recommended that the user
purchase a spare element assembly and several spare
element gaskets. The spare element assembly can
be installed immediately and the dirty assembly can
then be cleaned and be stored as a spare for the next
maintenance interval.
Note
Element gaskets should be replaced
each time the cell assembly is loosened
and removed to insure a gas tight seal.
Parts Ordering
When corresponding with your local Sales Ofce about
this equipment, always reference the equipment serial
number stamped on the nameplate.
When ordering replacement parts, specify the
complete 7-character part number of each required
part as found in the following parts list.

11
8 Series
HOUSING MATERIAL CARBON STEEL 304 STAINLESS STEEL CARBON STEEL
Flame Cell Material 304 Stainless Steel 304 Stainless Steel 316 Stainless Steel
Model Part Number
80802, 80803, 80804 8000903 8000922 8000901
81206 8000904 8000923 8000905
81608 8000906 8000924 8000907
82010 8000908 8000925 8000909
82412 8000910 8000926 8000911
82814 8000912 8000927 8000913
83016 8000914 8000928 8000915
83620 8000918 8000930 8000919
Table 8. Replacement Element Assemblies Part Numbers (Group D Gas)

8 Series
©Emerson Process Management Regulator Technologies Tulsa, LLC, 2015, Rev. F; All Rights Reserved
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 business of Emerson Process Management.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or
guarantees, express or implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify or improve the designs or specications of such
products at any time without notice.
Emerson Process Management Regulator Technologies Tulsa, LLC does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use
and maintenance of any Emerson Process Management Regulator Technologies Tulsa, LLC product remains solely with the purchaser.
Emerson Process Management
Regulator Technologies Tulsa, LLC
9932 East 58th Street
Tulsa, OK 74146-6411
Tel: [phone]
Fax: [phone]
For further information visit www.enardo.com