<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div></div><div>Brian,</div><div>I have a home made oil compensator on my oil filled motor.</div><div>I have only run this set up on a boat so far. Basically it's a top hat diaphragm </div><div>made of silicon & clamped in an Aluminium housing that has fill ports in it.</div><div>I am going to use the Parker regulator that Cliff is using successfully for his</div><div>air compensation, on my oil compensated sub thrusters. I will be able to dial</div><div>in a 5psi over pressure ( which seems to be industry standard) & pressurise</div><div>the oil with the air. Any back pressure on surfacing or expansion will vent</div><div>out the regulators relief valve, & should only be air because of the amount</div><div>of air in the air lines to the thruster.</div><div>Without compensation water can come in to the thruster from external pressure</div><div>& by being sucked in when the oil cools.</div><div>Alan</div><div><br>On 4/06/2019, at 8:41 AM, Brian Cox via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div style="font-family:Arial, sans-serif; font-size:10pt;"><font size="2">Hi All,</font><div><font size="2"> What is everybody doing to allow for expansion and contraction of their oil filled motors? </font></div><div><font size="2"><br></font></div><div><font size="2">Brian</font></div><div><font size="2"><br></font></div><div><font size="2"><br></font></div></div>
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