[PSUBS-MAILIST] Purge Valve

Sat Mar 30 21:26:53 EDT 2019

 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.htmlI posted a few photos on my Facebook page, but couldn't find you on messengerto 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 whenYou 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

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 & ballastadjustment. It is supposed to have a corrosion proof pump, although wouldneed flushing out after salt water use.I am wondering about the feasibility of using it to power manipulator hydraulicsusing  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 yokesHank
    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 theBottles & reach inside the hull & bleed air & O2 from there.It saves putting another fitting in line that may leak. Also there may be thePossibility of leaving the purge valve open, although no doubt you would hearIt 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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