General Data

Size: 1/2 – 8 inch
Pressure Class: Class 150 – 2500
Body Material: Stainless steel (S.S316, CF8M, 304L), carbon steel (A105), duplex, Hastelloy, Monel, Inconel
Trim Material: Polished or coated piston; hardened seat / Stellite
End Connection: Socket / Butt weld, Flanged (RF / RTJ)
Industries & Customers: Oil & gas, petrochemical, power plants, process control

Catalogue Cv curve & tableEngineering estimate

Cv vs opening percentage — PSM reference catalogue data

Select size

Rated Cv 5.1NPS 0.5"Characteristic Equal %Cv ratio at 50% 0.242Rangeability 40Confidence lowBack-test error ±45%

Opening %	Cv	% of rated
10	0.1	2%
20	0.3	6%
30	0.5	9%
40	0.8	16%
50	1.2	24%
60	1.9	37%
70	2.9	56%
80	3.8	75%
90	4.6	89%
100	5.1	100%

This table is not manufacturer measured data: Cv comes from the scaling law fitted to the measured series (back-test error ±45%, confidence low). Confirm with PSM engineering before ordering.

Size this valve