Well I've just had another slight upgrade . . . I fitted a rotating Racking Arm to Connor today. Here are the bits in the order they will assemble . . . inside on the left.
First off fit the long 1/2" BSP nipple into the ball valve and tighten it as far as it will go, then wind PTFE tape around the nipple where the body of the Ball Valve ends . . .
Screw the brass flange nut onto the nipple right down so that it tightens onto the tape before the ball valve
Then remove the nipple, without moving the flange nut.
Wind on more PTFE tape to the end of the nipple
And tighten it back onto the Ball valve
Fit a silicon O Ring to seal the wall and the flange nut . . . there is no leak path past the Flange Nut as we took care of that with the PTFE Tape.
This shows the full assembly of the Racking Arm the vessel wall is sealed between the PTFE washer, and the Silicon O Ring. I'm using a 15mm Brass Compression nut temporarily to hold the racking arm (Courtesy of Nick - Muddy Disco) in place on the end of the nipple. I will replace it with a stainless one but they are a little bit expensive.
The hole in the wall of the conical is 20mm, and is just slightly smaller than required clearance for the nipple . . . but being plastic the nipple will cut its own thread as it is screwed in . .. the O ring seals between the conical wall and the flange nut.
Inside First fit a PTFE washer (another engineering fit
) thanks to JamesB for that one, as it will allow the racking arm to rotate much more freely that just using another O Ring.
Follow that up with a M20 Form B Stainless Washer from Stig's Stainless Supplies
Which allows us to tighten up the 1/2" BSP Stainless Half Nut to seal everything together
The Racking Arm is fitted and tightened in place . . . then the Arm is aligned with the arm of the Ball valve . . this allows us to know what the position of the arm is when it is full of beer. . . . here they are in a horizontal position.
And following rotation to the vertical downward position
Looking forward to using this now.