torna su
close Close

CEI membership discount

Dear customer,
our systems show that your name is connected to a company associated with CEI: you would therefore be entitled to thediscount reserved for our members for CEI products and services. To check the validity of the association and benefit from the discounts, it is necessary to enter the register number assigned to your company in the box below.

VALIDATE AND CONTINUE
You can continue shopping even without entering the membership register number, but you will not have access to dedicated discounts.

CONTINUE WITHOUT DISCOUNTS

The membership register number has been correctly entered.
From now on, after logging into your MyNorma account, you can purchase our products at the price reserved for our members.

doneCONTINUE PURCHASING
Withdrawn help_outline
mode_commenti add_alert notifications star_border star

CEI EN 60534-2-5

CEI Classification: 65-86

Valvole di regolazione per processi industriali
Parte 2-5: Capacità di efflusso - Equazioni di dimensionamento per efflusso di fluidi attraverso valvole di regolazione multistadio con recupero di pressione tra uno stadio e l'altro
standard
CEI
CEI
Standard help_outline
Publication Date: 2004-08
ValidFrom: 2004-10
Language: EN-IT
Pages: 40
Issue Num.:  7393
Commitee: CEI-SC65B, CEI-CT65
La presente Norma contiene equazioni utilizzabili per calcolare il flusso che sono simili a quelle della IEC 60534-2-1. Le principali deviazioni della presente Norma, relativa alle valvole multistadio, riguardano:
a) le equazioni per il calcolo del fattore di espansione (equazione 18);
b) la non inclusione della sezione relativa al dimensionamento per il flusso laminare;
c) l’inclusione del fattore di interazione tra gli stadi k (8.8) e il fattore di riscaldamento successivo r (8.9);
d) l’aggiunta di tabelle per le valvole multistadio relative ai valori FL e xT. La presente Norma è abrogata con foglio di abrogazione CEI 65-86;Ab:2024-09

See also

IEC 60534-2-5:2003
EN 60534-2-5:2003

International Coding Standard (ICS)

25.040.40
Industrial process measurement and control
23.060.40
Pressure regulators
* Including pressure-reducers
* Protection against excessive pressure, see 13.240

Annotation

PLEASE NOTE: links will be automatically recognized and made clickable when the annotation will be published

send
shopping_cart Starting from € 26.00

Standard Evolution

close

ICS

International Classification for Standards (ICS) is an international classification system for technical standards.

The ICS is a hierarchical classification organized on three levels.

Level 1 covers the main fields of activity in standardization, e.g. road vehicle engineering, agriculture, metallurgy.

Each field has a two-digit notation, e.g.

  43    Road Vehicle Engineering

The main fields are subdivided into groups (level 2). The notation of a group consists of the field notation and a three-digit group number, separated by a point, e.g.

  43.040    Road vehicle systems

Some groups are further divided into sub-groups (level 3). The notation of a sub-group consists of the group notation and a two-digit number, separated by a point, e.g.

  43.040.20 Lighting, signaling and warning devices

You can identify the ICS code of your interest by typing the code or a keywordword in the dropdown ICS field, and by selecting one of the filtered results.

Search also in the summary/description of the standard

By flagging this control, the search for keywords will not be limited to the Standard Number and Title fields, but will also be performed in the Abstract of the standard.

This way, you will get more results.

You should use this option when you can not find the desired result with the standard approach and it is necessary to extend the scope of the search: by increasing the number of results, you will increase the number of non-relevant elements, as well.