Walworth Valves - Engineering Data
Walworth
Cast Carbon Steel - ASTM A216 GR WCB (a)
Gate, Globe and Check Valves Flanged and Buttwelding
Ends
Standard
Class Pressure - Temperature Ratings ANSI B16.34
-1981
|
Temperature
in°F
|
Maximum
allowable Non-Shock Working Pressure in
psig by Classes
|
|
150
|
300
|
400
|
600
|
900
|
1500
|
2500
|
| -20
to 100 |
285
|
740
|
990
|
1480
|
2220
|
3705
|
6170
|
| 200
|
260
|
675
|
900
|
1350
|
2025
|
3375
|
5625
|
| 300
|
230
|
655
|
875
|
1315
|
1970
|
3280
|
5470
|
| 400
|
200
|
635
|
845
|
1270
|
1900
|
3170
|
5280
|
| 500
|
170
|
600
|
800
|
1200
|
1795
|
2995
|
4990
|
| 600
|
140
|
550
|
730
|
1095
|
1640
|
2735
|
4560
|
| 650
|
125
|
535
|
715
|
1075
|
1610
|
2685
|
4475
|
| 700
|
110
|
535
|
710
|
1065
|
1600
|
2665
|
4440
|
| 750
|
95
|
505
|
670
|
1010
|
1510
|
2520
|
4200
|
| 800
|
80
|
410
|
550
|
825
|
1235
|
2060
|
3430
|
| 850
|
65
|
270
|
355
|
535
|
805
|
1340
|
2230
|
| 900
|
50
|
170
|
230
|
345
|
515
|
860
|
1430
|
| 950
|
35
|
105
|
140
|
205
|
310
|
515
|
860
|
| 1000
|
20
|
50
|
70
|
105
|
155
|
260
|
430
|
(a)-Permissible, but not recommended for prolonged
usage above approximately 800F. Consideration
should be given to the possibility of graphite
formation in carbon steel at approximately 800F.
See
footnotes below.
Walworth
Cast 1-1/4CR-1/2 Mo Steel - ASTM A217 GR WC6
(b)
Gate, Globe and Check Valves Flanged and Buttwelding
Ends
Standard
Class Pressure - Temperature Ratings ANSI B16.34
-1981
|
Temperature
in°F
|
Maximum
allowable Non-Shock Working Pressure in
psig by Classes
|
|
150
|
300
|
400
|
600
|
900
|
1500
|
2500
|
|
-20
to 100
|
290
|
750
|
1000
|
1500
|
2250
|
3750
|
6250
|
|
200
|
260
|
710
|
950
|
1425
|
2135
|
3560
|
5930
|
|
300
|
230
|
675
|
895
|
1345
|
2020
|
3365
|
5605
|
|
400
|
200
|
660
|
880
|
1315
|
1975
|
3290
|
5485
|
|
500
|
170
|
640
|
855
|
1285
|
1925
|
3210
|
5350
|
|
600
|
140
|
605
|
805
|
1210
|
1815
|
3025
|
5040
|
|
650
|
125
|
590
|
785
|
1175
|
1765
|
2940
|
4905
|
|
700
|
110
|
570
|
755
|
1135
|
1705
|
2840
|
4730
|
|
750
|
95
|
530
|
710
|
1065
|
1595
|
2660
|
4430
|
|
800
|
80
|
510
|
675
|
1015
|
1525
|
2540
|
4230
|
|
850
|
65
|
485
|
650
|
975
|
1460
|
2435
|
4060
|
|
900
|
50
|
450
|
600
|
900
|
1350
|
2245
|
3745
|
|
950
|
35
|
380
|
505
|
755
|
1130
|
1885
|
3145
|
|
1000
|
20
|
225
|
300
|
445
|
670
|
1115
|
1860
|
|
1050
|
20*
|
140
|
185
|
275
|
410
|
685
|
1145
|
|
1100
|
20*
|
95
|
130
|
190
|
290
|
480
|
800
|
*For
Welding end valves only. Flanged end ratings
terminate at 1000°F.
(b) - Not to be used above 1100°F. Consideration
should be given to the possibility of excessive
oxidation (scaling) in 1-1/4 Cr-1/2 Mo steel
above approximately 1050°F.
See
footnotes below.
Walworth
Cast 2-1/4 CR-Mo Steel-ASTM A217 GR WC9 (a)
Gate, Globe and Check Valves Flanged and Buttwelding
Ends
Standard
Class Pressure - Temperature Ratings ANSI B16.34
-1981
|
Temperature
in°F
|
Maximum
allowable Non-Shock Working Pressure in
psig by Classes
|
|
150
|
300
|
400
|
600
|
900
|
1500
|
2500
|
|
-20
to 100
|
290
|
750
|
1000
|
1500
|
2250
|
3750
|
6250
|
|
200
|
260
|
715
|
955
|
1430
|
2150
|
3580
|
5965
|
|
300
|
230
|
675
|
905
|
1355
|
2030
|
3385
|
5640
|
|
400
|
200
|
650
|
865
|
1295
|
1945
|
3240
|
5400
|
|
500
|
170
|
640
|
855
|
1280
|
1920
|
3200
|
5330
|
|
600
|
140
|
605
|
805
|
1210
|
1815
|
3025
|
5040
|
|
650
|
125
|
590
|
785
|
1175
|
1765
|
2940
|
4905
|
|
700
|
110
|
570
|
755
|
1135
|
1705
|
2840
|
4730
|
|
750
|
95
|
530
|
710
|
1065
|
1595
|
2660
|
4430
|
|
800
|
80
|
510
|
675
|
1015
|
1525
|
2540
|
4230
|
|
850
|
65
|
485
|
650
|
975
|
1460
|
2435
|
4060
|
|
900
|
50
|
450
|
600
|
900
|
1350
|
2245
|
3745
|
|
950
|
35
|
380
|
505
|
755
|
1130
|
1885
|
