Question Name that valve

[JohnN]

7/8" 300 Bar
And more importantly, what O-ring goes inside

 

[Still Kicking]

Genesis valve. What do you mean by inside? The neck oring is 116.

 

[JohnN]

Sorry I was unclear. There is an odd sized O-ring that seals the internal piston

 

[Still Kicking]

Sorry I was unclear. There is an odd sized O-ring that seals the internal piston

Piston? Do you mean stem? Seat?

I think this parts kit should cover you even though it's for a k valve.

https://www.scuba.com/p-gnskvsk/genesis-k-valve-service-kit?gad_source=1&gad_campaignid=16815341037&gbraid=0AAAAACmoH5XizbI9PmqLtG2BeRPbxxPtc&gclid=Cj0KCQjwsNnCBhDRARIsAEzia4APL0zr5VoJE1SYdZjrwEqp5zoq53MDvqEsS3hYTL9Y75IDFQ5K3sYaAoK-EALw_wcB&gclsrc=aw.ds

 

[JohnN]

Piston? Do you mean stem? Seat?

I wish I could claim English as my second language

I believe the proper name is the HP seat:

 

[Still Kicking]

I wish I could claim English as my second language

I believe the proper name is the HP seat:

Now you got me curious and since I have a genesis valve needing a rebuild .....

It looks like an 010 on the stem (actually two of them). I think it's a French valve so probably a metric equivalent but 010 should work. 010 is the standard stem oring for most US valves.

There is no oring on the seat. The seat face seals against the crown.

 

[Tanks A Lot]

The valve is manufactured by MDE, which is part of the Cavagna group (The three little stars). Genesis slaps their name on it.

The stem takes two BS1806 010 (6,07mm x 1,78mm | 80S).
The packing nut takes a BS1806 015 (14.00mm x 1,78mm | 70S).
The split washer is made from PTFE (6,10mm x 9,10mm x 1,40mm).

The stem and seat combination with the square ends is one of my favorite configurations.

 

[Scared Silly]

Name that valve

Ventil the gentile valve.

 

[Still Kicking]

The valve is manufactured by MDE, which is part of the Cavagna group (The three little stars). Genesis slaps their name on it.

The stem takes two BS1806 010 (6,07mm x 1,78mm | 80S).
The packing nut takes a BS1806 015 (14.00mm x 1,78mm | 70S).
The split washer is made from PTFE (6,10mm x 9,10mm x 1,40mm).

The stem and seat combination with the square ends is one of my favorite configurations.

Any valve design that uses an oring on the bonnet nut vs a crush washer is an improvement in my book.