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Types EZH and EZHSO
REDUCTION
DN 25
0
284
1
210
Q
f
2
126
3
79
0
550
1
408
C
g
2
245
3
154
0
31.3
1
34.3
C
1
2
33.6
3
32.1
Table 3b. 2:1 Line Flow Coefficients, Regulator with Integrated Whisper III Silencer
REDUCTION
DN 25
0
223
1
215
Q
f
2
140
3
87
0
433
1
417
C
g
2
273
3
168
0
35.5
1
35.4
C
1
2
32.3
3
32.9
FAILURE
PART NAME
(WORST CASE)
Filter
Filter blocked/ clogged
Pilot Disk
Pilot cannot be closed
Pilot Lower
Pilot cannot control
Diaphragm
Pilot Upper
Pilot cannot feed
Diaphragm
the regulator
Not proper
Regulator
performance of
Diaphragm
the motorization
pressure chamber
Frozen Pilot,
Pilot
Type SA/2 working
4
Table 3a. 2:1 Line Flow Coefficients, Regulator and Slam-Shut Travel
WITH SLAM SHUT (X BODY)
DN 50
DN 80
DN 100
1078
2247
3567
908
1684
2969
671
1058
1763
385
685
1062
2092
4359
6920
1762
3266
5760
1301
2052
3420
746
1328
2060
38.3
30.8
32.5
35.3
33.9
35.3
38.8
37.8
37.3
40.8
33.6
37.1
TYPES EZH WITH WHISPER III AND EZHSO WITH WHISPER III
SLAM SHUT INTEGRATED (X BODY)
DN 50
DN 80
DN 100
781
1693
2742
764
1418
2479
603
975
1644
370
685
1041
1516
3285
5320
1482
2751
4810
1169
1892
3190
718
1328
2020
37
30.8
31.7
37.5
33.6
34.1
39.5
37.1
36.4
39.4
38.3
37.6
Table 4. Failure Mode Analysis
CAUSE OF FAILURE
Debris or aromatics
present in the gas
Debris or aromatics
present in the gas
Debris or aromatics
present in the gas
Debris or aromatics
present in the gas
Debris or aromatics
present in the gas
Moisture in the gas,
high pressure drop
TYPES EZH AND EZHSO
DN 150
DN 25
DN 50
6845
280
5464
218
3685
128
2088
81
13,280
544
10,600
423
7150
249
4050
157
32.8
35.5
35.0
38.7
38.8
39.7
39.7
39.1
DN 150
DN 25
DN 50
6103
255
4974
209
3495
127
2036
81
11,840
495
9650
406
6780
247
3950
158
34.0
33.8
35.0
39.4
37.6
39.9
39.6
39.9
EFFECT
REGULATOR TYPE
Decrease of feeding
pressure gives decrease
of motorization pressure
Increase motorization
pressure
Decrease motorization
pressure
Decrease motorization
pressure
Balancing of pressures
and charge or discharge
of the motorization
pressure chamber
Type SA/2 loading upper
casing of regulator, Pilot
not supplying loading
pressure to lower casing
WITHOUT SLAM SHUT (E BODY)
DN 80
DN 100
1088
2266
3696
829
1698
2902
607
1066
1784
370
690
1072
2110
4396
7170
1609
3294
5630
1177
2069
3460
718
1339
2080
33.5
30.8
31.4
31.9
33.9
34.2
35.6
37.8
36.3
38.2
33.6
37.3
WITHOUT SLAM SHUT (E BODY)
DN 80
DN 100
793
1708
2789
716
1172
2438
566
984
1711
358
690
1057
1539
3313
5410
1389
2774
4730
1099
1908
3320
695
1339
2050
33.5
30.8
30.4
34.1
33.6
32.4
35.7
37.1
35.7
37.7
38.3
37.3
REGULATOR REACTION MODE
EZHSO
Open
EZH
- - - -
EZHSO
Open
EZH
Open
EZHSO
Open
EZH
- - - -
EZHSO
Open
EZH
- - - -
EZHSO
Open
EZH
- - - -
EZHSO
- - - -
EZH
- - - -
DN 150
DN 200
7010
13,026
5804
- - - -
3670
7010
2098
4051
13,600
25,270
11,260
- - - -
7120
13,600
4070
7860
31.4
35
35.9
- - - -
39.6
36.4
30.8
38.3
R96
DN 150
DN 200
6397
10,088
5304
- - - -
3449
6624
2072
3892
12,410
19,570
10,290
- - - -
7080
12,850
4020
7550
33.3
32.8
35.1
- - - -
37.1
39.3
39.6
39.6
- - - -
Close
- - - -
- - - -
- - - -
Close
- - - -
Close
- - - -
Close
Close
Close
R96B
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