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MMD > Archives > January 2016 > 2016.01.08 > 03Prev  Next


Suction Box Check Valve Problem
By Stanley Morton

Hi Doug,  As you indicated, the check valve flapper was positioned
under the top flanged nipple and held in place with a piece of motor
cloth.  Although the flapper was aligned properly inside the hole
in the top of the box, the flanged nipple was not aligned -- it was
mounted off-center and therefore, even though the flapper would engage
while pumping the piano, it could not fully seal off due to the
misalignment between the two.

Another quick question: When positioned over the hole the motor cloth
is not stiff enough to hold the flapper straight out; instead, the
flapper droops down and the far edge of the flapper tends to rest on
the vacuum screen inside.  Is this typical or should I cut the hinge
out of a little firmer piece of cloth?

Stan Morton


(Message sent Fri 8 Jan 2016, 04:48:56 GMT, from time zone GMT-0700.)

Key Words in Subject:  Box, Check, Problem, Suction, Valve

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