zdas04
Mechanical
- Jun 25, 2002
- 10,274
I was recently teaching a class that included a section on valves. When I got to Ball Valves I said that "while quarter-turn plug valves have been available for most of the 20th century, the earliest ball valves were commercially available around 1967."
This little factoid (which was irrelevant to the point of my lecture) totally derailed the presentation. The factoid was based on a 1967 announcement from WKM about their "revolutionary" ball valve. One of my students said that Hydril had been making ball valves for at least 10 years by 1967. I can't find any tracks to that earlier ball valve.
Does anyone have any insite into the origin of the first ball valves?
David Simpson, PE
MuleShoe Engineering
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
The harder I work, the luckier I seem
This little factoid (which was irrelevant to the point of my lecture) totally derailed the presentation. The factoid was based on a 1967 announcement from WKM about their "revolutionary" ball valve. One of my students said that Hydril had been making ball valves for at least 10 years by 1967. I can't find any tracks to that earlier ball valve.
Does anyone have any insite into the origin of the first ball valves?
David Simpson, PE
MuleShoe Engineering
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
The harder I work, the luckier I seem