Author Topic: Altered valve to barrel seal  (Read 1347 times)

Offline Brutuz

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Altered valve to barrel seal
« on: December 05, 2009, 06:38:33 AM »
Last week I received a new type of transferportseal but since it was crushed in the mail I had to toss it.
Thought it over and recalled I tried to fit a bolt seal on top last summer.
That didn't work because they were to thick and popped off.

The .177 probe seals I got for my QB78 are thinner and have a larger dia.

The fit is perfect!



Here's how it looks fitted on the tube



After putting it back together I took a few shots and the results were positive.

Since I wanted to shoot a full string I emptied the gun, inserted a new powerlet and left it for half an hour to adapt room temperature.

All shots on all three strings were taken with 60 seconds between shots.

Here's the graph



Here are the strings



If you'd like to try these seals for yourself,
in the USA they can be bought @ http://www.charliedatuna.com (soldas part ofthe QB-78 tune kit only)
in the UK they can be bought @ http://woodfield-gcp.webs.com

Such a seal has to be placed un-lubed !!
Crosman 1300 1377 1377c 2100 2289G 2240 2300KT 2400KT
Haenel III 284 & Shanghai B1
.22 SMK XS78 & XS19 & B40 (BMK) & Lider45TG
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Offline Toolmaker

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Re: Altered valve to barrel seal
« Reply #1 on: December 05, 2009, 11:20:16 AM »
Thanks for the info!
Matt N.
Pneumatic addict  
Benjamin 397PA (build date Nov. 09)  
Benjamin HB22 (build date Aug. 99)
Crosman 1377 (second variant build date Oct. 86)
Crosman 760c (build date Aug. 89)
Daisy Powerline 922 (Built in the 80\'s)
QB-78D .177  
Tech Force 6 (how did that get here?)