Emerson FISHER EZH Series Instruction Manual page 27

SYMPTOM
If outlet pressure is stable
If inlet pressure decreases
If inlet pressure is stable
If the slam-shut valve plug will not close
If the slam-shut valve plug closes
If the outlet pressure increases
If the outlet pressure is stable
If the outlet pressure increases
If the outlet pressure stabilises
If the outlet pressure increases
Screw
(Key 21 - Figures 16, 17, 18, 19)
DN
Metric Spanner Torque Nm
25 M12 19 70
50 M16 24 190
80 M22 32 350
100 M27 41 400
150
M27 41 665
200
Screw
(Key 16 - Figures 16, 17, 18, 19)
DN
Metric Spanner Torque Nm
25 M5 Allen 4 6.5
50
M6 Allen 5 7
80
100 M8 Allen 6 12
150
M8 Allen 6 25
200
Screw
(Keys 68, 74 - Figures 17, 19)
DN
Metric Spanner Torque Nm
25
50
80
100 M5 Allen 4 4
150
M5 Allen 4 4
200
Stem nut
(Key 151 - Figures 18, 19)
DN
Metric Spanner Torque Nm
25
43
50
M10 17
80
61
100
150
M16 24 61
200
Table 9. Troubleshooting for Types EZH and EZHSO Regulators
CAUSE
Observe the evolution of the inlet pressure
External leak
The regulator is tightshut
Operation faulty
Operation correct
Close the vent and observe the evolution of the outlet pressure
Valve plug internal leak
The valve plug is tightshut
Internal leak
Pilot leak
Regulator internal leak
Table 10. Torque Specifications
Screw
(Key 24 - Figures 16, 18)
In. Spanner Torque Nm
1/2"-13x7/8"
3/4" 110
1/2"-13x1"
3/4"-10x2" 1"1/8" 150
M20 30 315
Screw
(Key 33 - Figures 16, 7)
Metric Spanner Torque Nm
M4 Allen 3 4
M5 Allen 4 6.5
M6
Allen 5 10
M6
M6 Allen 5 10
Screw
(Key 77 - Figures 17, 19)
Metric Spanner Torque Nm
M16 20 135
M20 30 315
Hex nut
(Key 152 - Figures 18, 19)
Metric Spanner Torque Nm
54
M12 19 81
68
M16 24 65
Types EZH and EZHSO
Locate and repair leak or contact after-sales
Increase the set point until tripping occurs
(without exceeding the outlet limits)
Control the slam-shut valve plug or contact after-sales
Control the valve plug and slam-shut orifice or contact after-sales
Control the pilot valve plug or contact after-sales
Control valve plug and orifice or contact after-sales
Screw
(Key 6 - Figures 16, 17, 18, 19)
In. Spanner Torque Nm
9/16"-12x2" 13/16"
75
1/2"-13x1"1/4 3/4"
5/8"-11x1"1/2 15/16" 100
3/4"-10x3" 1"1/8 200
1"-8X3" Allen 19 534
Travel indicator fitting
(Key 141 - Figures 16, 17, 18, 19)
Metric Spanner Torque Nm
19 (M12)
M16 30
20
M16 20 30
Screw
(Key 154 - Figures, 19)
Metric Spanner Torque Nm
M4 Allen 3 4
M6 Allen 5 7
M8 Allen 6 12
M4 Allen 3 4
Stem nut
(Key 155 - Figures 18)
Metric Spanner Torque Nm
M8 special 19 41
ACTION
Control the release relay
Bleed off outlet side
Control the release relay
Close pilot feed
Screw
(Key 50 - Figure 22) (Key 1 - Figure 23)
In. Spanner
9/16"-12x1"3/4 13/16"
1/2"-13x1"1/2 3/4"
5/8"-11x1"3/4 15/16"
3/4"-10X2"1/4 1"1/8
1"-8X2"3/4 1"1/2
Screw
(Key 51 - Figure 22)
Metric Spanner
M8 13
M8 13
A108
Torque Nm
110
175
260
510
Torque Nm
15
15
R118
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