Any Chevy engine, if it's well-modified or just slightly warmed-over, requires a good set of valve seals. Originally, a small rubber O-ring, fitted in the second valve stem groove, served as the only ...

Materials used in the seals of split butterfly valves for aseptic pharmaceutical manufacturing should be chosen carefully. Split butterfly valves (SBVs) minimize the amount of airborne particle ...

QUESTION -- I've encountered a problem with my 991/2 VW Golf, (new style), that has me baffled. The car is a 2.0 litre, manual transmission with 91,000 kms on it. We've had the car for less than one ...