Replaceable relief valve for multiple cylinder / gas applications

A modular relief valve structured to be disposed in a cavity, said cavity being a cylindrical cavity, said cavity having a first end with an opening in fluid communication with a fluid passage, and a second end open to the atmosphere, and a threaded interior surface, said relief valve comprising:

• a hollow, generally cylindrical body having a first end, a second end, an outer surface and an inner surface, said body defining a body cavity;
• said outer surface having threads thereon, said relief valve body outer threads structured to engage said cavity threaded interior surface;
• said relief valve body first end having an inwardly extending flange with a central opening, said flange defining a valve seat;
• said relief valve body second end having interior threads;
• a valve member, said valve member structured to be movably disposed in said body cavity and to sealingly engage said body first end flange valve seat;
• a biasing device, said biasing device structured to engage said relief valve valve member and bias said relief valve valve member against said relief valve valve seat;
• a retainer having a generally planar body with a first perimeter portion and a second perimeter portion;
• said retainer body first and second perimeter portions being arcuate and each having a threaded radial surface, said first and second perimeter portion radial surfaces structured to engage said relief valve body second end interior threads;
• said retainer body structured to be disposed in said relief valve body cavity second end and to define at least two relief valve exhaust passages through said relief valve body cavity second end when so disposed;
• said retaining member disposed in said relief valve body second end;
• said relief valve valve member movably disposed in said relief valve body cavity;
• and
• said biasing device coupled to, and extending between;
• said retaining member body and said relief valve valve member.

A modular relief valve for a service valve, said service valve having a body and a valve assembly, said service valve body defining a primary fluid passage with a valve seat about said primary fluid passage, a primary exhaust passage, a valve assembly cavity, and a relief valve cavity, said primary fluid passage and said primary exhaust passage being in fluid communication via said valve assembly cavity, said valve assembly disposed in said valve assembly cavity, said valve assembly having a valve member structured to move between two positions, a first, closed position, wherein said valve member sealingly engages said valve seat preventing fluid from passing past said valve member, and a second, open position, wherein said valve member is spaced from said valve seat allowing fluid communication between said primary fluid passage and said exhaust passage, said relief valve cavity being a cylindrical cavity, said relief valve cavity having a first end with an opening in fluid communication with said primary fluid passage and a second end open to the atmosphere, said relief valve cavity having a threaded interior surface, said relief valve comprising:

• a hollow, generally cylindrical body having a first end, a second end, an outer surface and an inner surface, said relief valve body defining a relief valve body cavity;
• said relief valve body outer surface having threads thereon, said relief valve body outer threads structured to engage said cavity threaded interior surface;
• said relief valve body first end having an inwardly extending flange with a central opening, said flange defining a valve seat;
• said relief valve body second end having interior threads;
• a relief valve valve member, said relief valve valve member structured to be movably disposed in said relief valve body cavity and to sealingly engage said relief valve body first end flange valve seat;
• a biasing device, said biasing device structured to engage said relief valve valve member and bias said relief valve valve member against said valve seat;
• a retainer having a generally planar body with a first perimeter portion and a second perimeter portion;
• said retainer body first and second perimeter portions being arcuate and each having a threaded radial surface, said first and second perimeter portion radial surfaces structured to engage said relief valve body second end interior threads;
• said retainer body structured to be disposed in said relief valve body cavity second end and to define at least two relief valve exhaust passages through said relief valve body cavity second end when so disposed;
• said retaining member disposed in said relief valve body second end;
• said relief valve valve member movably disposed in said relief valve body cavity;
• and
• said biasing device coupled to, and extending between, said retaining member body and said relief valve valve member.

A service valve comprising:

• a body and a valve assembly;
• said service valve body defining a primary fluid passage with a valve seat about said primary fluid passage, a primary exhaust passage, a valve assembly cavity, and a relief valve cavity, said primary fluid passage and said primary exhaust passage being in fluid communication via said valve assembly cavity;
• said valve assembly disposed in said valve assembly cavity, said valve assembly having a valve member structured to move between two positions, a first, closed position, wherein said valve member sealingly engages said valve seat preventing fluid from passing past said valve member, and a second, open position, wherein said valve member is spaced from said valve seat allowing fluid communication between said primary fluid passage and said exhaust passage;
• said relief valve cavity being a cylindrical cavity, said relief valve cavity having a first end with an opening in fluid communication with said primary fluid passage and a second end open to the atmosphere, said relief valve cavity having a threaded interior surface;
• and
• a modular relief valve including a body, a valve member, a biasing device, and a retainer;
• said relief valve body being a hollow, generally cylindrical body having a first end, a second end, an outer surface and an inner surface, said relief valve body defining a relief valve body cavity;
• said relief valve body outer surface having threads thereon, said relief valve body outer threads structured to engage said relief valve body cavity threaded interior surface;
• said relief valve body first end having an inwardly extending flange with a central opening, said flange defining a valve seat;
• said relief valve body second end having interior threads;
• said relief valve valve member structured to be movably disposed in said relief valve body cavity and to sealingly engage said relief valve body first end valve seat;
• said relief valve biasing device structured to engage said relief valve valve member and bias said relief valve valve member against said relief valve valve seat;
• said retainer having a generally planar body with a first perimeter portion and a second perimeter portion;
• said retainer body first and second perimeter portions being arcuate and each having a threaded radial surface, said first and second perimeter portion radial surfaces structured to engage said relief valve body second end interior threads;
• said retainer body structured to be disposed in said relief valve body cavity second end and to define at least two relief valve exhaust passages through said relief valve body cavity second end when so disposed;
• said retaining member disposed in said relief valve body second end;
• said relief valve valve member movably disposed in said relief valve body cavity;
• said biasing device coupled to, and extending between, said retaining member body and said relief valve valve member;
• and
• said relief valve disposed in said relief valve cavity.