[PSUBS-MAILIST] bilge pump

Wed Dec 6 15:16:43 EST 2017

 Hi Antoine,That is a fantastic set up you have, I love it!  I also like the bladder system you have.  I bought a couple bladders myself and might incorporate one in Gamma.  The bladder will allow for shallower launch depth and  more accurate weight control.  
Hank
    On Wednesday, December 6, 2017, 11:04:41 AM MST, Antoine Delafargue via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  

 hi Hank,In Pilot Fish I have a manual bilge pump from Sarum hydraulics, that gives 100cc per double stroke, against up to 40bar. it is an oversized hydraulic pump from Oil and gas type of application, highly corrosion resistant. quite expensive though (1000$)
at the pump intake I have a three way valve so I can take water either from the 50Liters soft bladder VBT, or from the bilge (either aft or forward of the sub)at the pump outlet, the pipes and valves also branch out either to the sea via through hull, or back to the VBT bladder. This way it is possible to: pump bilge water to the VBT bladder at near zero back pressure pump bilge water to the outsidepump sea water from the VBT bladder to the outside.  regardsAntoine

On Wed, Dec 6, 2017 at 1:50 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Alan,Your idea to be able to pump leaked water out through the hull is pretty interesting.  Where did you find a 36v dc pump?  Maybe I am overthinking the idea.Hank
    On Tuesday, December 5, 2017, 9:09:19 PM MST, Alan via Personal_Submersibles <personal_submersibles at psubs. org> wrote:  

 Hank,no not a DSV. I have forgotten the lpm rate, but not high. The pressure is 650psi so it can easily operate at my maximum depth of 500ft.The intention as a bilge pump was to just act as a hand held suction hose to mopup any wash that may come in, & comply with G.L. I am not planning on major leaks!I am wanting 2 solenoid ballast valves (inlet & outlet) to work in unison, mainly soI can ride a bit higher while towing, as the inlet valve will stop the air in the tankcompressing, & also as a safe guard if the sub is left floating in the water forlong periods of time.Alan

Sent from my iPad
On 6/12/2017, at 4:28 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs. org> wrote:

 Alan,That will be a pretty slow pump, good for deballasting but not so good if you have a leak at the surface and want to save the sub.  So your new sub is going to have sealed ballast tanks?  interesting.   Hmmmm that makes it a DSV ;-)Hank
    On Tuesday, December 5, 2017, 5:37:01 PM MST, hank pronk via Personal_Submersibles <personal_submersibles at psubs. org> wrote:  

 Hi all,Do any of you sub owners have bilge pumps?  Hank______________________________ _________________
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