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EMERSON 7 Series Flame Arrestor Instruction Manual, Enardo-EN

Summary

The 7 Series Flame Arrestor is a critical safety device designed to stop and quench flame front propagation in confined, low-pressure gas systems. This comprehensive manual serves as an essential guide for facility management and qualified service professionals. It details all necessary specifications, principles of operation, safe installation procedures, ongoing maintenance techniques, and accurate parts ordering information. Adhering strictly to these guidelines is mandatory for industry compliance and preventing potential hazards such as fire or explosion.

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Page 1 Text Content

Instruction Manual

7 Series

D103829X012  February 2015

7 Series Flame Arrestor

Table of Contents Introduction ..................................................................1 Specifications ..............................................................2 Principle of Operation ..................................................3 Factors Affecting Flame Arrestor Performance ........... Installation ...................................................................5 Maintenance ................................................................6 Recommended Spare Parts ......................................10 Parts Ordering ...........................................................10 Parts List....................................................................10

Figure 1. 7 Series Flame Arrestor

WARNING

Introduction

Failure to follow these instructions or to properly install and maintain this

Scope of the Manual

equipment could result in an explosion, fire and/or chemical contamination This Instruction Manual provides specifications, causing property damage and personal installation and maintenance instructions and parts injury or death. ordering information for the 7 Series flame arrestor. Enardo flame arrestors must be installed, operated and maintained in accordance Product Description with federal, state and local codes, rules

7 Series flame arrestors are designed to stop the

and regulations and Emerson Process

propagation of confined low pressure deflagration.

Management Regulator Technologies

The 7 Series is typically used for end-of-line and near-

Tulsa, LLC (Emerson) instructions.

end-of-line applications when the system operating

Call a qualified service person to service

pressure is near atmospheric levels and when there is

the unit. Installation, operation and

minimal probability of a flame stabilizing on the flame

maintenance procedures performed

arrestor element for an extended period.

by unqualified person may result

Designed with flanged connections, this arrestor or th er ic nl

in improper adjustment and unsafe

allows removal of the flame cell element for easy

operation. Either condition may result in

cleaning and replacement without removing the

equipment damage or personal injury.

arrestor body from the pipe connection. Standard

Only a qualified person shall install or

housing construction is aluminum, carbon steel or

service the 7 Series flame arrestor.

Page Summary Contents For EMERSON 7 Series Flame Arrestor Instruction Manual, Enardo-EN

Page 1 Instruction Manual 7 Series D103829X012  February 2015 7 Series Flame Arrestor Table of Contents Introduction ..................................................................1 Specifications ..........
Page 2 7 Series Specifications The Specifications section lists the specifications for the 7 Series. Specification is stamped on the nameplate attached to the flame arrestor. Available Construction Pipe Leng...
Page 3 7 Series Table 1. 7 Series Available Construction 7 SERIES IN-LINE FLAME ARRESTOR CARBON STEEL AND STAINLESS STEEL HOUSINGS CONSTRUCTION Flange Size Housing Size Model In. mm In. mm 7 SERIES IN-LINE F...
Page 4 7 Series Table 2. Maximum Experimental Safe Gap (MESG) NATIONAL ELECTRICAL CODE (NEC) 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 Table 3. 7...
Page 5 7 Series Table 4. 7 Series Pipe Length Rules GAS GROUP “B” GAS GROUP “C” GAS GROUP “D” Maximum length of pipe between the flame arrestor and the ignition source 4 ft. / 1.2 m., open ended pipe 6 ft. /...
Page 6 7 Series include features such as clean-out ports, temperature 3. Inspect the flame cell with a calibrated pin gauge monitoring device or other options that might have to ensure maximum crimp size ope...
Page 7 7 Series an automated cycle timing method Torquing Instruction or by having the cleaning operation initiated whenever the pressure loss across the arrestor element exceeds a CAUTION predetermined valu...
Page 8 7 Series PATTERN 1 PATTERN 2 PATTERN 3 PATTERN 4 PATTERN 5 PATTERN 6 or th er ic nl PATTERN 7 PATTERN 8 PATTERN 8 Figure 4. Flange Pattern Tightening Sequence
Page 9 7 Series Table 5. Tightening Steps and Torque Values(1)(2) 7 SERIES FLAME ARRESTORS WITH ALUMINUM TIGHTENING STEPS AND TORQUE (LBF-FT / N•m) END SECTIONS ONLY Model Pattern(2) Step 1 Step 2 70802-A, 7...
Page 10 7 Series Recommended Spare Parts Parts Ordering For installations that require frequent maintenance and When corresponding with your local Sales Office about minimum downtime, it is recommended that t...
Page 11 7 Series Table 9. Replacement Element Assemblies Part Numbers (Group D Gas) HOUSING 304 Stainless 316 Stainless Aluminum Aluminum Carbon Steel Carbon Steel Carbon Steel MATERIAL Steel Steel FLAME 304 ...
Page 12 7 Series Table 11. Replacement Element Assemblies Part Numbers (Group B Gas) HOUSING 304 Stainless 316 Stainless Aluminum Aluminum Carbon Steel Carbon Steel Carbon Steel MATERIAL Steel Steel FLAME CEL...

Manual Details

Brand Emerson
Pages 12
File Size 1.08 MB
Published June 03, 2026
46 views

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Frequently Asked Questions

What is the primary purpose of the 7 Series flame arrestor?

It is designed to stop the propagation of confined low pressure deflagration in end-of-line or near-end-of-line applications.

Who should install or service this equipment?

Only a qualified service person shall install, operate, and maintain the 7 Series flame arrestor.

What are the standard gas connection materials available?

Available housing construction materials include aluminum, carbon steel, 304 Stainless steel, 316 Stainless steel, and Hastelloy.

What is the maximum temperature rating for standard fiber gaskets?

Standard fiber gaskets have a temperature rating of 450°F / 232°C. Graphite gaskets offer higher temperatures.