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EN FVFA Series
4
1
2
3
PATTERN 1
ENARDO™ EN FREE VENT FLAME ARRESTOR SERIES WITH
STEEL OR STAINLESS STEEL END SECTIONS ONLY
Model
EN-FVFA-0401
EN-FVFA-0401.5
EN-FVFA-0402
EN-FVFA-0603
EN-FVFA-0802
EN-FVFA-0803
EN-FVFA-0804
EN-FVFA-1206
EN-FVFA-1608
EN-FVFA-2010
EN-FVFA-2412
EN-FVFA-3014 and EN-FVFA-3016
1. Using machine oil as lubricant. See Bolt Lubrication section below and torque correction factors for other lubricants in Table 6.
2. Carbon steel element assembly fasteners are provided with a low friction polymer coating. No additional lubrication should be required. When stainless steel fasteners are provided,
lubrication is recommended to reduce tightening torque and to prevent potential galling.
3. See Figure 5.
6
1
6
3
4
5
2
PATTERN 2
16
12
8
4
18
14
10
6
PATTERN 5
Figure 5. Flange Pattern Tightening Sequence
Table 5. Element Assembly Tightening Steps and Torque Values
(2)
Pattern
(3)
1
2
3
3
4
5
8
1
4
5
6
3
2
7
PATTERN 3
1
20
5
9
13
17
3
7
11
15
2
19
TIGHTENING STEPS AND TORQUE (FT•LB / N•m)
Step 1
Step 2
Snug
20 / 27
Snug
20 / 27
Snug
25 / 34
Snug
25 / 34
Snug
35 / 47
Snug
35 / 47
1
10
5
8
4
9
6
2
PATTERN 4
(1)
Step 3
Step 4
Step 5
50 / 68
- - - -
50 / 68
- - - -
50 / 68
80 / 108
50 / 68
75 / 102
100 / 135
70 / 95
100 / 135
130 / 176
70 / 95
100 / 135
130 / 176
3
7
- - - -
- - - -
- - - -
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