90-degree quarter-turn shut-off valves for clean, dirty, viscous and corrosive liquid and gas services
General Data
Size
1 – 24 inch
Pressure Class
Class 150 – 2500
Body Material
Carbon steel / Stainless steel
End Connection
Socket / Butt weld, Threaded, Flanged (RF / RTJ)
Catalogue Cv curve & tableEngineering estimate
Cv vs opening percentage — PSM reference catalogue data
Rated Cv 23NPS 1"Characteristic Equal %Cv ratio at 50% 0.242Rangeability 40Confidence very lowBack-test error ±55%
Opening %
Cv
% of rated
10
0.6
2%
20
1.3
6%
30
2
9%
40
3.8
16%
50
5.6
24%
60
8.6
37%
70
12.8
56%
80
17.2
75%
90
20.6
90%
100
23
100%
This table is not manufacturer measured data: Cv comes from the scaling law fitted to the measured series (back-test error ±55%, confidence very low). Confirm with PSM engineering before ordering.
