FUJITIVE EMISSION

適用規格

・ISO 15848-1:2006       Industrial valves-Fugitive emissions-Measurment, test and Qualification procedures

                                         Part 1：Classification system and Qualifiたcation procedures for type testing of valves 

・ISO 15848-2:2006       Industrial valves-Fugitive emissions-Measurment, test and Qualification procedures

                                         Part 2：Production acceptance test of valves

・TA Luft                        Technical Guideline for Air Pollution Control   

                                         （ドイツの 大気汚染防止に係るガイドライン）                    

ISO 15848の規定

Grade

Measured leakage

Remarks

rate  mg/(S x M)

Remarks

A

(helium only)

≦0.000001

 Typically achieved with bellows gaskets or an equivalent

 spindle/shaft gasket system for swivel valves

B ≦0.0001  Typically achived with packing on a PTFE basis or elastomer packing
C  ≦0.01  Typically achieved with packing on the basis of flexible graphite