Metal-metal seal, tolerances
What tolerances should be used for a hole and a shaft at least so that the seal is sufficiently airtight (for example, the valve stem and the valve bore)? Is H7/h7 sufficient?
All Replies
Viewing 2 replies - 1 through 2 (of 2 total)
H7/h6 would be alright maybe a bit on the tight side.
The important part is that the seat and seatingface are lapped together/like a car engine valve. And all parts that are inline are machined without taking the part out of your chuck. Valvestem bore should be bored using a boring bit and not a reamer(it is able to wander).
If you make the stem thin enough as to let it flex a bit then you should be able to make it seal.
But why not going with delrin. If you have the machining capability to machine a metal to metal valve the Delrin won’t be to difficult! If you make a flat toilet plunger valve design on a flat face than opening forces should be minimal!
Regards,
Marc
Viewing 2 replies - 1 through 2 (of 2 total)
- You must be logged in to reply to this topic.
marc,
stem seal without oring
clearance stem to body