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Jayco Thief Harch and Vent Valves

vent valves

•   JAYCO SUPER SEAL  •  EXCEEDS API2000 STANDARDS FOR ALLOWABLE LEAKAGE  •  ALL HIGH TENSILE STRENGTH ALUMINUM BODY, LID, AND FLANGE  •  FULL OPENING LID AND LARGE BODY CAVITY FOR EASY CLEAN-OUT AND MAINTENANCE  •  EASY VACUUM SEAT REPLACEMENT  •  INTERNAL PLUNGER HAS BUILT IN VACUUM BREAKER - OR - OPTIONAL PRESSURE ONLY PLUNGER  •  DEPENDABLE STOCK LEVELS AT OUR FACTORY  

 THE PURPOSE OF THE VENT VALVE IS TO WORK IN TANDEM WITH THE THIEF HATCH TO MINIMIZE THE ESCAPE OF LIGHT ENDS OF CRUDE IN LEASE STORAGE TANKS BY MAINTAINING A PRESSURE ON THE TANK.  A VACUUM RELIEF FUNCTION IS ALSO STANDARD TO PREVENT A SUCTION OR A DRAW DOWN FROM COLLAPSING THE TANK.  THE VENT VALVE IS INSTALLED INTO THE VENT LINE EXHAUST TO ACCOMPLISH THIS.      

 JAYCO INLINE AND STACK VENT VALVES ARE DESIGNED FOR OPTIMUM PERFORMANCE AND EASY CLEAN OUT AND MAINTENANCE, AND ARE AVAILABLE IN 2, 3, AND 4 INCH SLIP-ON ENDS.  THE STANDARD VACUUM SETTING IS 0.4 OUNCE.  STANDARD PRESSURE SETTINGS ON 2 AND 3 INCH ARE 1.3 OUNCE, 4 INCH VALVES ARE 1.5 OUNCE.  ADDITIONAL WEIGHTS ARE AVAILABLE IN ONE OUNCE INCREMENTS.

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