IEC 60534-7 pdf download

IEC 60534-7 pdf download.Industrial-process control valves – Part 7: Control valve data sheet
1 Scope
This part of the IEC 60534 series provides a list of requirements that are normally necessary for the procurement of the majority of control valves for process systems. No attempt is made to include all possible requirements for any conceivable process. The list is arranged in a format designed to assist the specification writer with a standardized presentation of data and also to be a basis for use with data processing facilities. A detailed set of instructions is included in order to ensure that the abbreviated terms are fully understood and that consistent data entries are always made.
3 Terms and definitions
For the purposes of this document, the terms and definitions given in the IEC 60534 series apply.
4 Application
4.1 General The control valve data sheet (Figure 1 ) below may be used for three different levels of control valve selection. 4.2 Preliminary valve specification For a preliminary inquiry and/or quotation, buyer and vendor may agree on a minimum level of information. In this case, the buyer and manufacturer mark a few lines only in column 1 by a dot, triangle or other symbol. This method minimizes efforts for both buyer and vendor. 4.3 Inquiry valve specification In inquiry stage, some of the process data and also some of the general requirements will not be fully known and specified. This may not allow the application of the IEC calculation methods given in IEC 60534-2-1 and IEC 60534-2-5. Preliminary valve sizing methods may be used at this stage. Since the main focus of the inquiry specification is to provide all data required to work out a comparable technical and commercial quote, in most cases there is a need to mark additional lines beyond those in 6.1 . Also on the inquiry specification, the lines in column 1 shall be marked by a dot, triangle or other symbol by the buyer and manufacturer. 4.4 Order valve specification A complete ordering specification should ideally include all relevant information about the valve, actuator and accessories concerned. In this case, the fully completed control valve data sheet becomes a kind of passport, which allows an exact identification and can be used for many purposes.
5 General requirements sheet
5.1 Purpose of the general requirements sheet The purpose of the general requirements sheet (Figure 2), which is optional, is to provide a means for the user to specify general or special requirements that are applicable to a valve or group of valves. Examples are national and international standards, user company standards and special project requirements. These general or special requirements shall be listed in the table of contents section of page 1 of the general requirements sheet. Supplementary general requirements sheets (Figure 3) may be used as necessary. It may also be necessary to cross- reference the general requirements sheet(s) with the data sheets. If there is a conflict between the general requirements sheet and the data sheet, then the latter shall overrule.NOTE For thos e c ountries that use 8,5 × 1 1 inch paper and wher e linefeed is limited to 1 /6 inch, the gener al requir ements sheets can be short ened by deleting the appropriate length from the middle portion of the for ms. The data sheet c an be shortened by deleting the “R emar ks” section. The use of computers per mits an adjustable linef eed which allows the forms to be print ed without the deletion of any lines. 5.2 Alternate location for data sheet items Any item on the data sheet (Figure 1 ) which cannot be adequately described in the available space shall be covered on the general requirements sheet. 5.3 Items to be considered for inclusion in general requirements Items not included on the data sheet may also be covered on the general requirements sheet. The following is a partial list of areas that may need to be considered and to be stated on the general requirements sheet: a) terminology (see IEC 60534-1 ); b) codes, standards and regulations; c) valve sizing (see IEC 60534-2-1 and 60534-2-5); d) noise (see IEC 60534-8-3, respectively IEC 60534-8-4); e) inspection and routine testing (see IEC 60534-4); f) non-destructive examination; g) marking (see IEC 60534-5); h) documentation; i) material requirements; j) face-to-face dimensions (see IEC 60534-3-1 , IEC 60534-3-2 and IEC 60534-3-3) k) final inspection requirements (see IEC 60534-4) l) environmental considerations; m) packaging; n) accessories; o) quality assurance requirements.