WebANSI/FCI Class IV: Designated Leakage Class: Class IV; Maximum Allowable Leakage: 0.01% of the rated flow capacity of the valve, Cv, air, or water as the test medium. Test … WebClassification of allowable leakage rates as well as the test procedures and conditions are stated in several standards, but two of the most often references from oil companies and consulting engineers are: API 598, …
Fluid Controls Institute
WebApr 16, 2015 · The FCI Control Valve and Regulator Section notes that FCI 70-2 has been intended to apply to control valve seat leakage. If line isolation and/or absolute tight shut … WebFCI has leakage standards for 3 different types of devices: control valves, regulators, and solenoid valves. These standards are regularly updated, so be sure to reference the latest revision. Seat Leakage The quantity of test fluid passing through an assembled [device] in the closed position under defined test conditions. cef measures
What Are The Control Valve Seat Leakage Standards? ANSI FCI 70 …
WebDec 5, 2024 · Leakage Class Designation: Maximum Leakage Allowable: Test Medium: Test Pressure: Testing Procedures Required for Establishing Rating: CLASS I – – – No … WebOct 10, 2024 · If the leak rate surpasses a tightness class limit, one stem seal adjustment may be done (one per endurance class). If the valve still is above a tightness class of C after the stem seal adjustment or surpasses a 50 ppm leakage rate on the valve’s body seal, then it is disqualified. WebLEAKAGE CLASS MAXIMUM SEAT LEAKAGE TEST MEDIA Class I As agreed between customer and supplier None Required Class II 0.5% of rated capacity Clean air/water @ ambient temperature, 45-60 psi-g Class III 0.1% of rated capacity Clean air/water @ ambient temperature, 45-60 psi-g Class IV 0.01% of rated capacity butyl acrylate boiling point