[modeleng] Re: The ban on paint stripper and clack valves

Hi All,

I have always had the same problem getting S/S balls to seat, I even made a 
tool to linish the seatings.

For some time now I have made my Hand Pumps with clacks that use O rings.
They are simply Mushroom shaped with an O ring under them which sit onto a 
seating. The trick is to get sufficient clearance up the stem of the 
Mushroom and sufficient clearance around the head whilst controlling the 
lift.

I did experiment with balls on O-Ring seats but found that the  ring had a 
nasty habit of flipping up as the O Rings cannot be retained. The trouble is 
on the sizes of ball used, that it is not possible to form a retention 
flange to hold the O ring down and keep sufficient gap around the ball for 
adequate water flow.

Regards

Clif



----- Original Message ----- 
From: "Barrie Purslow" <bpduo@xxxxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Tuesday, March 17, 2009 5:07 PM
Subject: [modeleng] Re: The ban on paint stripper and clack valves


> Hi Jesse,
>
> I've spent hours messing about with stainless steel balls clacks. I've
> tapped them, I've hit them, I've squeezed them and I've burnished them. 
> I've
> used various arrangements of brass rod to ensure absence of side thrust 
> etc.
> etc. Despite all of this I cannot get a stainless ball to seat reliably.
> Nitrile are much better but not perfect.
> I have on my "To Do" list a design of clack that uses an O
> ring............watch this space.
>
> Best (Non Political) Regards,
>
> Barrie
>
> ----- Original Message ----- 
> From: "Jesse Livingston" <fernj1@xxxxxxxxxxx>
> To: <modeleng@xxxxxxxxxxxxx>
> Sent: Tuesday, March 17, 2009 4:05 PM
> Subject: [modeleng] Re: The ban on paint stripper and clack valves
>
>
>> Green NECK,
>>
>> No Vodka here but I have two small bottles of Canadian "Yukon Jack" that
>> might do for paint remover.
>>
>> Why would anyone want to use anything other than stainless steel for 
>> clack
>> valves?  I have used Stainless in every pump I have built and had no
>> problems at all, even when hydroed at 400PSI.  I seats them by giving 
>> them
>> a
>> whack with a brass rod and hammer.
>>
>> RED NECK in Troy, TN, in what is becoming the United Socialist States of
>> America under the Muslim dictator, Hussein Obama.
>>
>>
>> ----- Original Message ----- 
>> From: "TEL" <tel47@xxxxxxxxxxx>
>> To: <modeleng@xxxxxxxxxxxxx>
>> Sent: Monday, March 16, 2009 1:14 AM
>> Subject: [modeleng] Re: The ban on paint stripper
>>
>>
>>> Don't think so Neck, but enough of it and you don't care if the paint
>>> gets removed or not.
>>> The other Neck
>>>
>>> Jesse Livingston wrote:
>>>> Tel,
>>>>
>>>> That sounds a lot like what sort of weapons rule our Emperor Hussein
>>>> Obama
>>>> will have enacted.  Won't Vodka work as a paint remover??
>>>>
>>>> NECK
>>>>
>>>>
>>>>> Rubber knives and forks next?
>>>>>
>>>>> Alan Stepney wrote:
>>>>>
>>>>>> Probably the most popular paint stripper (in the UK) is Nitromors.
>>>>>> This and most other present paint strippers are soon to be banned.
>>>>>>
>>>>>> See:  http://tinyurl.com/btlek5
>>>>>>
>>>>>> I shall build up a nice stock to keep me going for a long time!
>>>>>>
>>>>>> Alan
>>>>>> MODEL ENGINEERING DISCUSSION LIST.
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