Royce,
Thanks for the link to Bal-tec. More than I thought I needed to know. All useful info, since I will be building a tender hand pump in the (hopefully) near future.
Jerry Reshew had an article in SitG a few years back about fixing leaky check valves using the hammer-blow brinelling technique. Jerry emphasized that the ball used to brinell the seat was sacrificial. In other words, throw it away after use and don't try to use it in the check valve. In anticipation of my own hand pump project I purchased a set of both steel and bronze balls from SSSM. The steel for the brinelling , and the bronze for the ball seals.
[Dang. That word "brinelling" is new to me and sure sounds useful. I'll start using it occaisionally during meetings at the office. Eventually someone will ask what it means, and I'll make some breezy allusion to a fictitious reference to a classic project management technique. Like "ensuring compliance to pre-qualified conformal parameters", as in "pounding a square peg into a round hole."]
As for your axle pump project, please don't get carried away and invest in a helium mass spectrometer leak detector.
Steve
[EMAIL PROTECTED] wrote:
Hi folks.
In doing some surfing, I ran across this website. Thought it might be helpful to those whose inclinations run towards designing their own.
http://www.precisionballs.com/BallCheckValves2.htm
I'm still working on the axle pump design for my Philly. Check valves are an important part of the design.
royce in SB
