Pressure/vacuum relief valve assembly

A valve assembly for relieving both vacuum and over pressure conditions in a container, said valve assembly comprising:

• a body having a first port, a second port, and a third port, said body being securable such that said first port is placed in fluid communication with said container;
• a first valve seat structure removably positionable in said second port;
• a second valve seat structure removably positionable in said third port;
• each of said valve seat structures including a fluid passage, a wall surrounding said fluid passage, and a valve seat provided at one end of said wall;
• a first reciprocatable structure including a valve element and a stem extending from said valve element, said first reciprocatable structure being positionable in said body for reciprocating movement such that said valve element of said first reciprocatable structure will interact with said valve seat of said first valve seat structure to thereby open and close said second port;
• a second reciprocatable structure including a valve element and a stem extending from said valve element, said second reciprocatable structure being positionable in said body for reciprocating movement such that said valve element of said second reciprocatable structure will interact with said valve seat of said second valve seat structure to thereby open and close said third port;
• said first valve seat structure further including a plurality of guide vanes spaced around and radiating inwardly from said wall and extending into said fluid passage of said first valve seat structure, each of said guide vanes having an exposed, rounded distal tip for contacting said stem of said first reciprocatable structure to thereby guide said reciprocating movement of said first reciprocatable structure;
• and
• said second valve seat structure further including a plurality of guide vanes spaced around and radiating inwardly from said wall and extending into said fluid passage of said second valve seat structure, each of said guide vanes having an exposed, rounded distal tip for contacting said stem of said second reciprocatable structure to thereby guide said reciprocating movement of said second reciprocatable structure,
• wherein, when vacuum conditions exist in said container, said valve element of said first reciprocatable structure will move out of contact with said valve seat of said first valve seat structure such that a first fluid flows into said second port, through said first port and into said container but, when said vacuum conditions do not exist in said container, said valve element of said first reciprocatable structure will remain in contact with said valve seat of said first valve seat structure such that said second port is closed and
• wherein when over pressure conditions exist in said container, said valve element of said second reciprocatable structure will move out of contact with said valve seat of said second valve seat structure such that a second fluid flows out of said container, through said first port and out of said third port but, when said over pressure conditions do not exist in said container said valve element of said second reciprocatable structure will remain in contact with said valve seat of said second valve seat structure such that said third port is closed.