Those Lovely Aeolian Valves
By Les Smith
The test as to whether the problem lies with the valve itself or elsewhere is quite simple. Disconnect the tube from the tracker bar and in it's place attach a short piece of knotted tubing. Either hit the switch, or start pumping. If you can still hear the valve leaking and the pneumatic still partially collapses, the problem IS with the valve block. If that 30 year old, piece of junk valve holds tight, with no discernable leakage of vacuum--which is highly unlikely in my opinion--then the problem lies between the tracker bar and the nipple. That, too, is equally simple to test. Take a piece of masking tape and seal off the tracker bar holes. Now suck on the end of the tube you disconnected at the valve nipple. That will instantly tell you whether the tracker bar to nipple run is air-tight or not. Since there are no junction blocks, controls or fittings between the valve block and the tracker bar, any problem will be immediately apparent. Its repair will be equally obvious.
Les Smith
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(Message sent Wed 15 Nov 1995, 17:56:16 GMT, from time zone GMT-0500.) |
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