FCI - ANSI/FCI 70-2
Control Valve Seat Leakage
| Organization: | FCI |
| Publication Date: | 1 January 2006 |
| Status: | inactive |
| Page Count: | 9 |
scope:
SCOPE & LIMITATIONS
Selection of a leakage class is not restricted as to valve design, but acceptable values for various commercially available designs are suggested for each class under Section 4.
The standard cannot be used as a basis for predicting leakage at conditions other than those specified.
This standard is similar to IEC 60534-4, except that no provision is made for Class IV-S1 and the standard is applicable for valves with a Cv value less than 0.1. The air leakage test and allowable leak rates for Class V are equivalent to the water test and allowable water leakage rates for a water test performed at a nominal temperature of 60ºF.
PURPOSE
This standard establishes a series of seat leakage classes for control valves and defines the test procedures.
Document History
