[PSUBS-MAILIST] Purge Valve

Sun Mar 31 20:39:17 EDT 2019

David, Cliff,
It cost just under $400 NZ. There are now others on the market like 
Ryobi. I am not sure if they have the corrosion resistant pump.
On Alibaba I found the exact motor & housing for the pump ( no pump)
for around $50- .Apart from the other functions like trim & ballast & maybe 
powering a manipulator, I still have the other parts of the pressure washer 
so I could use it to clean my sub down from a bucket of water or from a tap 
if I set it up right.
It has an axial piston pump & although you could reverse polarity on the
motor the pump will still operate in the same direction.
Because of the one way valves it will lock in place if power is off.
The flow rate is 4.2 litres / minute.
Alan

> On 31/03/2019, at 2:26 PM, Cliff Redus via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Is the pump bidirectional?  At max pressure how many GPM will it move?  If there is no power to the pump, does it lock in place when exposed to pressure or will it freewheel?  
> 
> Cliff
> 
> On Saturday, March 30, 2019, 4:54:02 PM CDT, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> Cliff,
> It comes from a K1, K'Archer 36V lithium battery powered pressure washer. 
> There is little identification on the pump to determine who manufactures it.
> https://www.karcher.cn/cn-en/home-garden/mobile-cleaning/k-1-battery-pressure-washer-cn-11170510.html
> I posted a few photos on my Facebook page, but couldn't find you on messenger
> to link to.
> It is solid but has plastic fittings on it that can't be changed out.
> Paul Moorehouse took an interest in it when I posted.
> It has an over-pressure shut off that I disabled. As a pressure washer when
> You release the trigger pressure builds up & the motor shuts off.
> I am going to put in a pressure relief valve instead for manipulator operation.
> The battery I am using as a systems back up battery.
> Alan
> 
> <image1.JPG>
> <image2.JPG>
> 
>> On 30/03/2019, at 11:19 PM, Cliff Redus via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> 
>> Alan what is the model number and manufacturer of the pump?
>> 
>> Cliff
>> 
>> On Friday, March 29, 2019, 10:37:46 PM CDT, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> 
>> 
>> Hank,
>> I am using a 36V 750 psi pressure washer pump on my sub for trim & ballast
>> adjustment. It is supposed to have a corrosion proof pump, although would
>> need flushing out after salt water use.
>> I am wondering about the feasibility of using it to power manipulator hydraulics
>> using  water. I had heard that Nuytco had used a water hydraulics system.
>> Are you familiar with that at all, or have any thoughts on this?
>> My maximum operating depth is 500ft so I should have 500psi above my 
>> maximum ambient pressure.
>> Alan
>> 
>> 
>>> On 30/03/2019, at 1:38 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>> 
>>> Alan, same as David, bleeds on both yokes
>>> Hank
>>> 
>>> On Friday, March 29, 2019, 1:50:14 PM MDT, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>> 
>>> 
>>> Thanks everyone,
>>> It might be easiest & safest in my case ( 1 person sub ) to just shut off the
>>> Bottles & reach inside the hull & bleed air & O2 from there.
>>> It saves putting another fitting in line that may leak. Also there may be the
>>> Possibility of leaving the purge valve open, although no doubt you would hear
>>> It when you turned the air on! 
>>> Alan
>>> 
>>>> On 30/03/2019, at 7:36 AM, Rick Patton via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>> 
>>>> Alan,
>>>> My O2 tanks are outside and I have a O2 cleaned 1st stage to knock it down to LP before coming into the sub so I bought a CGA 540 to go onto the bottle and then a bleed fitting that goes to that like I think you are looking for then a machined fitting with O ring like a scuba tank valve that my 1st stage reg attaches to. Go to "thescubadiversstore.com" and then type in the search bar 46335 and it will pull up a bleed part but the one I have does not the have threaded port for a gauge. The guy was really great to work with and good prices as well. This will get you started and when I get to me shop, I'l look up the part number that doesn't have the gauge port and get that to ya.
>>>> Rick
>>>> 
>>>> On Thu, Mar 28, 2019 at 6:06 PM Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>> Hi,
>>>> Just wondering if people use / have an external valve to purge air / O2 from the 
>>>> system to enable the removal of the first stage yoke from the tank.
>>>> With a dive set up you just press the second stage purge valve.
>>>> Alan
>>>> 
>>>> 
>>>> 
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