Emerson Enardo DFA 7236 Instruction Manual Download Page 5 | Manualshive

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Figure 4

. Lifting Diagram

CENTER OF GRAVITY

CENTER OF GRAVITY

5

Model DFA 7236

North America

Only

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Summary of Contents for Enardo DFA 7236

Page 1: ... 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 ...

Page 2: ...e Arrestor Performance Gas Group WARNING Methanol is classified as a Group D IIA vapor However our lab tests indicate that methanol exhibits characteristics unlike other Group D IIA vapors under certain conditions We therefore recommend that an arrestor rated for Group C IIB3 vapors be specified for methanol service The type of gas in the system determines its gas grouping and therefore predetermi...

Page 3: ...ssure is the pressure of the system at or near static flow conditions High pressure deflagration and detonations can occur more easily at higher system operating pressures than at pressures near atmospheric Elevated pressures condense the ignitable gas giving the flame more matter and energy to release thereby boosting the flame heat intensity Unstable over driven detonations exist during a deflag...

Page 4: ...w located on the unit points in the direction travelling with the vapor flow Models that have drain plugs are designed for horizontal installation and should be installed with the drain ports 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 flame cell assembly to determine blockage The pressure taps should b...

Page 5: ...Figure 4 Lifting Diagram CENTER OF GRAVITY CENTER OF GRAVITY 5 Model DFA 7236 North America Only ...

Page 6: ...ssembly Following Flame Propagation Event 1 Inspect the outboard flame cells for damage immediately following a deflagration detonation and or stabilized burn 2 Carefully remove the element assembly from the arrestor with the entire flame arrestor out of the line 3 Inspect the flame cells and the screens visually for any signs of corrosion or other damage and inspect the flame cells with a calibra...

Page 7: ...le 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 1 following the designated sequence repeating the sequence as shown Flange pattern tightening sequences are shown in Figure 5 Bolt Lubrication Lubrication affects required torque of clean fasteners in good condition mor...

Page 8: ...sented 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 specifications of such products at any time without notice Emerson Process Managemen...

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