1. ISO 15848-1. Industrial valves—measurement, test and qualification procedures for fugitive emissions—part 1: classification system and qualification procedures for type testing of valves; 2006.
2. ISO 15848-2. Industrial valves—measurement, test and qualification procedures for fugitive emissions—part 2: production acceptance test of valves; 2003.
3. API 622. Type testing of process valve packing for fugitive emissions, 1st ed. 2006.
4. Denny DF. A force analyse of the stuffing-box seal. Research report 550, BHRA, the Fluid Engineering Centre, Harlow, England; 1957.
5. Radial stress distribution and friction forces in a soft-packed stuffing-box seal;Ochonski;Tribology International,1988