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Control and On/Off Valves - Malema - #9

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Combined Pressure Reducing & Desuperheating Valve
Both steam pressure reduction & temperature reduction (Desuperheating) are done in a single valve making it an extremely efficient, cost effective and compact solution.
• Compact design
• High rangeability 40:1
• Reduced noise level
• Efficient cooling water atomization
• Reduced straight runs for pressure & temperature measurements
• Better control over change in flow
STEAM <=
STEAM i=>
Combined PRDS valve - water entry through bottom
Combined PRDS valve - water entry through top
Size
Rating
A
B
C1
D
Weight
Weight
(inch)
ANSI
(inch)
(inch)
(inch)
(inch)
(Lbs) Flanged
(Lbs) BW
2
300
10.5
5.6
9.3
3.0
38
77
600
11.3
5.3
9.3
2.4
52
110
3
300
12.5
6.1
10.9
2.9
58
123.2
600
13.3
7.2
10.5
2.9
90
189.2
1500
18.5
6.2
11.1
4.4
129
257.4
4
300
14.5
6.5
11.0
2.9
81
171.6
600
15.5
8.6
11.2
3.0
161
345.4
900
18.0
7.0
11.2
3.0
191
398.2
6
150
16.0
7.1
14.8
2.5
102
215.6
300
18.6
8.2
14.8
2.5
144
301.4
600
20.0
9.4
15.7
2.5
327
697.4
900
24.0
8.7
17.2
2.5
380
781
1500
31.0
11.0
17.2
2.5
395
825
8
300
22.4
9.8
14.8
2.5
215
451
600
24.0
13.3
17.6
2.5
545
1155
10
300
27.9
12.4
20.1
2.6
468
963.6
600
31.0
12.0
26.5
2.6
1080
2266
12
300
30.5
14.7
24.0
2.6
728
1513.6
Size
Rating
A
B
C1
C2
Weight
Weight
(inch)
ANSI
(inch)
(inch)
(inch)
(inch)
(Lbs) Flanged
(Lbs) BW
1
300
7.8
8.7
6.6
3.2
30.8
30.8
300
8.3
7.3
6.3
5.7
52.8
52.8
300
10.7
7.5
6.5
5.7
74.8
74.8
300
10.7
7.5
6.5
5.7
83.6
83.6
2
300
10.5
9.9
8.8
4.7
81.4
81.4
600
11.3
10.2
7.5
5.2
112.2
107.8
900
14.8
7.6
7.5
5.2
136.4
132
3
300
12.5
10.3
9.7
5.6
127.6
123.2
600
13.3
10.0
10.4
7.7
200.2
191.4
4
300
14.5
10.7
10.1
5.9
173.8
167.2
600
15.5
13.2
12.0
9.0
354.2
345.4
6
300
18.6
14.2
13.1
8.0
316.8
301.4
600
20.0
13.7
17.2
10.8
726
704
8
300
22.4
14.0
14.6
9.4
477.4
455.4
10
300
27.9
16.7
18.4
12.3
1027.4
961.4
12
300
30.5
21.9
*
15.4
1907.4
1819.4
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