Contents
News
Rotary seal with wave-shaped structure increases productivity in the process industry 1 & 14
Greene Tweed develops FFKM with enhanced plasma resistance 2
Online tools and mobile apps aid selection and installation of seals 2
Epoxy system can be used in potentially explosive environments 2
Drinking water measurement valve uses ultrasound to record flow rate 14

Company News
Investment strengthens James Walker’s gasket operations and grows capacity 3
Service centre bolsters John Crane’s manufacturing capabilities 3
Evonik acquires US technology start-up for 3D printing materials 4
Trelleborg acquires manufacturer of silicone components 4
Conferences and Meetings News Conference on aircraft cabin air quality takes place in September 4

Feature
Dynamic seal – rear retainer least and maximum material conditions 5

Recently Published Papers 9
Regulars
In Brief 3
Patents 11
Events Calendar 14