Ansi fci standard 70 2, from the american national standards institute and the fluid controls institute, defines leakage classifications specifically for control valves. Control valve seat leakage classifications galloup. To api 598 or bs 6755 or ansi fci 70 2 class v or vi flow coefficients cv value as per the enclosed tables pages 6 through 11 temperature range from minus 196 degrees c to 600 degrees c main. Fci 70 2 specifies leakage rates on a test stand with when tested according to the fci procedure usually 50 psi air at ambient temperature the fci leakage classes are a prety good. Control valve seat leakage classification ansi fci 70 2 2006 class vi maximum seat leakage allowable ansi fci 70 2 2006 bubbles per minute as tabulated are a suggested alternative based.
The most commonly used by gemco valve are class i, class iv and class vl. Classification of seat leakage through control seat leakage. 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. Developers included a lowpressure air test to determine seat leakage to class v. Ansifci 7022006 control valve seat leakage pdf document. Order this important seat leakage set and save on fci 70 2 20 and 70 32016. Scope ansifci 702 is the industry standard for control valve leakage. Jun 16, 2019 today, however, the class v test often applies to all types of control valveswith leakage rates that fall between the class iv and class vi test. Ansi fci 70 2 20 control valve seat leakage fluid controls institute 20 9 pages more details. Regulator seat leakage fluid controls institute on. Ansifci 702 control valve leakage valve engineering. This standard is similar to ansi 702, control valve seat leakage, but eliminates class v as this is generally not required in regulators. Responding to the industrys request, the fci has recently updated the standard to include class viii, which is a no permissible leakage or bubble tight standard generally associated with resilient seating regulators either balanced or unbalanced with o rings or other gapless seals. Bubbles per minute as tabulated are a suggested alternative based on a suitable.
If line isolation andor absolute tight shutoff is a normal expectation of the valve application, the fci. Fci, power signal standard for springdiaphragm actuated control valves. Ansi american national standards institute api american petroleum institute. Valve seat leakages fci 70 2 class, thread408301633. Class i is also known as dust tight and can refer to metal or resilient seated valves. Ansifci 70220 control valve seat leakage fluid controls institute 20 9 pages. Ansifci 702 defines six classifications of control valve leakage, providing test procedures and the maximal allowable leakage mal for each. Today, however, the class v test often applies to all types of control valveswith leakage rates that fall between the class iv and class vi test. There are actually six different seat leakage classifications as defined by ansifci 702 1976r1982.
Bubbles per minute as tabulated are a suggested alternative based on a suitably calibrated measuring device, in this case a. Ansifci standard 702, from the american national standards institute and the fluid controls institute, defines leakage classifications specifically for control valves. This voluntary standard has been compiled and issued in the. Fci 8411985 r20, metric definition of the valve flow coefficient c v. Ansi fci 70 2 2006 standard establishes a series of seat leakage classes for control valves and defines the test procedures. Leakage classification of control valves engineering toolbox. Ansifci 702 2006 american national standard control valve seat leakage fluid controls institute, inc. Oct 22, 2014 the fci control valve and regulator section notes that fci 70 2 has been intended to apply to control valve seat leakage. Is also know as dust tight and can refer to metal or resilient seated valves. Our policy towards the use of cookies techstreet, a clarivate analytics brand, uses cookies to improve your online experience. There are six different seat leakage classifications as defined by ansi fci 702.
Ansi fci 9112010, standard for qualifications of control valve stem seals. This standard sets forth criteria related to the general requirements, testing, permanent marking, selection, care, and use of protectors to minimize the occurrence and severity or prevention of injuries from such hazards as impact, nonionizing radiation and liquid splash. Misconceptions regarding control and isolation valve standards. American national standards institute ansi the ansi standard fci 702.
Ansi fci 70 2 and iec 605344 are in unison with leakage classes and protocol. Leakage classification of control valve ansifci 702. This voluntary standard has been compiled and issued in the public interest. Also defined are specific test procedures to determine the appropriate class. The fci control valve and regulator section notes that fci 70 2 has been intended to apply to control valve seat leakage. As with fugitive emissions, there are many different seat leakage classes for control valves and isolation valves. Ansi fci 70 2 2006 control valve seat leakage standard clarification, thread408265522. This standard is similar to ansi 70 2, control valve seat leakage, but eliminates class v as this is.
Leakage of valves testing api 598, ansi fci 702, msssp61. Fci 70 2 20 control valve seat leakage codebookdownload. Control valve seat leakage classifications ansi fci 702 superseding ansi b16. Ansifci 7032016, regulator seat leakage jordan valve. If line isolation andor absolute tight shutoff is a normal expectation of the valve allocation, fci.
It is intended to eliminate present misunderstandings and to assist and guide those people involved in the. This is closely related to seating force fully closed position. Soft seat valves are those where either the plug or seat or both are made from some kind of. Amaryl lids to download pdf you need some things, like my website and the name of the file. The most common used are class iv class vl class iv is also known as metal to metal. Ansifci standard 702, from the american national standards institute and the fluid controls institute, defines leakage classifications specifically for control valves scope. This standard is similar to ansi fci 70 2 control valve seat leakage. He should use fci 70 2 for seat leakage tests, for the simple reason that api 598 api 6d allowable leakages are meant for shutoff valves, therefore much more restrictive than fci 70 2. Ansifci 7022006 standard establishes a series of seat leakage classes for control valves and defines the test procedures. But the fluid control institute fci also notes that the standard ansi fci 70 2 has been intended to apply to control valve seat leakage. It is the kind of leakage rate you can expect from a valve with a metal plug and metal seat. Control valve and regulator section notes that fci 702 has been intended to apply to control. Oct 14, 2014 ansifci 702 is the industry standard for control valve leakage. Oct 21, 2015 ansifci 7022006 american national standard control valve seat leakage fluid controls institute, inc.
Foreword this foreword is included for information only and is not part of ansi fci 70 2 2006, control valve seat leakage. Control valve seat leakage, establishes a series of six seat leakage classes for control valves and defines the test procedures. Fci 70 2 class vi is for soft seated control valves but is frequently used as a leakage acceptance test criteria for metal seated isolation valves such as ball and butterfly valves. This standard does not apply to pressure regulators as defined in the following standards. There are actually six different seat leakage classifications defined by ansi fci 70 2 2006 european equivalent standard iec 605344. This standard establishes a series of seat leakage classes for regulators and defines the production test procedures. Find the most uptodate version of fci 70 3 at engineering360. Fci 87 2 2015, power signal standard for springdiaphragm actuated control valves. Aug 11, 2019 ansi fci 70 2 pdf control valve section.
It is strongly recommended that users of fci 70 2 also obtain a copy of fci 70 3. Classifications ansifci 702 defines six classifications of control continue reading. If line isolation andor absolute tight shutoff is a normal expectation of the valve application, the fci control valve and regulator sections recommend specifying another standard, such as api 598, valve test and inspection. As for the shell test, its ok to use api 598 api 6d, since fci 70 2 doesnt cover such tests. There are actually six different seat leakage classifications defined by ansi fci 70 2. Ansi fci 70 2 class iv shutoff packless construction trim options available for precise sizing great for fluid, gas, and vapor applications protected springs normally closed wide variety of pilots for many applications. Control valve and regulator section notes that fci 70 2 has been intended to apply to control valve seat leakage. No test required by agreement between user and supplier classes ii, iii and iv. There are six different seat leakage classifications as defined by ansi fci 70 2. Control valve seat leackage class vi maximun seat leackage. It is the kind of leakage rate you can expect from a valve.
Jan 05, 20 there are actually six different seat leakage classifications as defined by ansi fci 70 2 1976r1982. Class i is also know as dust tight and can refer to metal or resilient seated valves. Control valve seat leakage classification ansi fci 70 2 2006 class vi maximum seat leakage allowable ansi fci 70 2 2006 bubbles per minute as tabulated are a suggested alternative based on a suitably calibrated measuring device, in this case, a 6 mm 0. Order this important seat leakage set and save on fci 70220 and 7032016. Fci 7032004 download ansi, icc, ul, asme standards. Page 7 leakage rates available for standard products page 8 guide to ansifci 7022006 class i modified class ii. Page 8 guide to ansifci 7022006 class i modified class ii, iii or iv valves. Instantly download the fci 70 2 20 control valve seat leakage.
The common ones are ansi fci 70 2 iec 605344, api 598, mss sp61 and iso 5208. This standard establishes six classes of seat leakage for control valves. Fci 7032016 download ansi, icc, ul, asme standards. Control valve seat leakage fluid controls institute on.
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