valve stem question

[nevadacowboy]

I have seen these valves on the bay.  Is the statement below true:

Theoben Rapid compatible, Valve and Stem for 12ft/lb or FAC rifles

Beware of cheaper imitation home made valves listed

fitted with an up rated firing pin with two seals which give a lot better seal and  more consistent shot

fits all models of rapid and complete with all o rings

[KCE]

It says oxo on some bus adverts but it does not mean the bus sell them.
Some adds on ebay may be true some may be misleading in order to gain a sale.
When it comes to rapid parts I use a handful of people who have stood the test of time producing them to very high standards.
They are the only people I will ever use for my spares or let them work on my rapids.

[nevadacowboy]

And those trusted suppliers are?

[Dr Bob]

IMHO if you fit two O rings on the stem all you will do is increase the drag. The first grove on the original Rapid valve stems was I believe to try and absorb some of the air before the O ring.
Good idea in theory but I do a stem with only one groove that has an O ring in it and it dosnt seem to make a difference.

Bob

[KCE]

I have always trusted Dr Bob and KevG as I have used them both for parts for many years.
They both have gained vast amounts of knowledge and trust from many rapid owners worldwide over a long time.
There aftersales is exceptional and they will always give trustworthy advise in your hour of need.
Hope this is of use to you fellow member. 

[nevadacowboy]

Thanks for the info.

[Ca_Varminter]

Exactly what Dr Bob said!!
The Titanium Valves I turn have slightly tapered profile with
1 O-ring groove....




But my latest prototype..
Short metal valve body.
Sealing face and stem lined with Delrin
So Valve-stem doesn't have an O-ring groove!


Stuart

[nevadacowboy]

Thanks for the replies everyone.

[Squinty]

I have seen these valves on the bay.  Is the statement below true:

Theoben Rapid compatible, Valve and Stem for 12ft/lb or FAC rifles

Beware of cheaper imitation home made valves listed

fitted with an up rated firing pin with two seals which give a lot better seal and  more consistent shot

fits all models of rapid and complete with all o rings

hahaha, compatible with all models...firing pin

what it does is help to seal up a knackered valve body

[James325]

I had problems with my valve sealing. Bought a Dr Bob valve and stem from Ebay, Sorted my issue.
I noticed the twin O-ring listings, but it seemed like everywhere I read it wasn't a great idea.

[KevG]

Double orings on stem only realy cause a problem on a tight fitting valve and stem.then you can get air lock between the stem orings.
KevG