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Emerson Enardo EN FVFA Series Instruction Manual

Emerson Enardo EN FVFA Series Instruction Manual

Free vent flame arrestor

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Instruction Manual
D103771X012
August 2020
EN Free Vent Flame Arrestor Series

Table of Contents

Introduction ........................................................................................1
Specifications ....................................................................................2
Principle of Operation ........................................................................4
Factors Affecting Flame Arrestor Performance ..................................4
Installation .........................................................................................4
Maintenance ......................................................................................5
Recommended Spare Parts ..............................................................8
Parts Ordering ...................................................................................8
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™ 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 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 flame arrestor.
EN FVFA Series
Figure 1. Typical EN Free Vent Flame Arrestor

Introduction

Scope of the Manual
This Instruction Manual provides instructions for installation, startup,
maintenance and parts ordering information for the EN Free Vent
Flame Arrestor (FVFA).
Flame Arrestor Classification
The flame arrestors within the scope of this document have been
tested and certified in accordance with EN ISO-16852 as end-
of-line deflagration flame arrestors and are therefore suitable for
unconfined deflagrations into an enclosure or vessel.

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  Summary of Contents for Emerson Enardo EN FVFA Series

  • Page 1: Table Of Contents

    Enardo™ flame arrestor must be installed, operated and maintained in accordance with Introduction federal, state and local codes, rules and regulations, and Emerson Process Management Scope of the Manual Regulator Technologies Tulsa, LLC instructions. This Instruction Manual provides instructions for installation, startup,...
  • Page 2: Specifications

    EN FVFA Series Specifications The Specifications section lists the specifications for the EN Free Vent Flame Arrestors. The following information is stamped on the nameplate attached to the arrestor: model number, flange size and rating, maximum initial operating pressure, EN number (European Standard), EU type examination certificate, notified body number, gas group, date of manufacture and serial number;...
  • Page 3 EN FVFA Series FVFA Housing Connection Housing Element Connection Options Size Size Material Material Type Group 04 = 4 in. 01 = 1 in. C = Carbon Steel 4 = 304 SST F = Flat face 2 - Temperature Instrumentation Port through through IIB3...
  • Page 4: Principle Of Operation

    EN FVFA Series Principle of Operation Maximum Initial Operating Pressure The EN Free Vent Flame Arrestor is intended to operate at The EN Free Vent Flame Arrestors prevent flame propagation atmospheric pressure when at or near static flow conditions. by absorbing and dissipating heat using spiral wound crimped ribbon flame cells.
  • Page 5: Maintenance

    EN FVFA Series Table 4a. Torque Values for Raised Face Connection Flange (Steel Only) BOLT DIAMETER TORQUE NOMINAL PIPE DIAMETER NUMBER OF BOLTS Ft-lbs N•m 0.50 12.70 12.20 1-1/4 0.50 12.70 17.63 1-1/2 0.50 12.70 24.40 0.63 16.00 47.45 2-1/2 0.63 16.00 55.59...
  • Page 6 EN FVFA Series PATTERN 1 PATTERN 2 PATTERN 3 PATTERN 4 PATTERN 5 Figure 5. Flange Pattern Tightening Sequence Table 5. Element Assembly Tightening Steps and Torque Values ENARDO™ EN FREE VENT FLAME ARRESTOR SERIES WITH TIGHTENING STEPS AND TORQUE (FT•LB / N•m) STEEL OR STAINLESS STEEL END SECTIONS ONLY Model Pattern...
  • Page 7 EN FVFA Series Table 6. Torque Correction Factors for Common Lubricants DESCRIPTION COEFFICIENT OF FRICTION MULTIPLY TORQUE VALUE IN TABLE 6 BY Machine Oil f = 0.15 1.00 API SA2 Grease f = 0.12 0.80 Nickel Based Lubricant f = 0.11 0.73 Copper Based Lubricant f = 0.10...
  • Page 8: Recommended Spare Parts

    Technologies, Inc. All rights reserved. 08/20. 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...

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