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521 <br />Female <br />Patented 3,378,021 <br />male <br />III Union <br />SAFETY VALVES <br />SAFETY VALVE - Mounted in fuel lines in submersible systems at the island <br />surface level to shut-off in the event of fire or impact, preventing fuel spillage and <br />fire. This is accomplished as the top of the Valve shears instan y upon impact or <br />the fusible link melts and closes the Valve in the event of fire. The Valve features <br />a flapper -style poppet design, which allows unobstructed flow. its patented design <br />houses the poppet and seat in the lower valve body, completely independent of <br />the shear section, so even with the top off, the Valve provides a 100% liquid tight <br />seal. A stainless steel reset nut eliminates stripping the fusible link during valve <br />reset, reducing downtime by allowing manual valve reset. An air test port allows <br />pneumatic testing of the line without breaking its integrity. <br />Madel # <br />Size-:: <br />- Top Thread <br />z <br />_Weight (lbs.) <br />Height <br />Width - <br />521 RFS -15 <br />1'/i <br />Female <br />d 5.2 <br />6'le' <br />4'/i <br />521RMS-15 <br />1'12' <br />Male <br />5.3 <br />6" hs' <br />4'/2* <br />521 RUS-15 <br />11l2, <br />Union <br />6.3 <br />75h6' <br />4112' <br />• Zinc -plating assures maximum corrosion resistance <br />• Stainless steel shaft and spring construction provide added reliability <br />• Ears and raised bosses allow secure valve anchoring <br />• Can be anchored by using the 521 KR U -Clamp Anchor <br />• UL listed 195P <br />J) <br />