Double poppet relief valve

A relief valve comprising:

• a housing comprising:
• a cylinder portion;
• and
• a body portion;
• a piston slidably disposed in said cylinder;
• a push rod attached to said piston and extending therefrom into said body portion;
• a poppet sleeve disposed in said body portion and in communication with an inlet of said body portion, said poppet sleeve having an inner orificing surface disposed therein;
• a poppet seal disposed adjacent said inlet of said body portion;
• a sealing poppet assembly attached to said push rod and having a sealing surface adapted for sealing engagement with said poppet seat when in a closed position;
• and
• an orificing poppet assembly attached to said push rod and having an outer orificing surface thereon adapted for throttling, spaced relationship with said inner orificing surface such that fluid flowing from said inlet of said body portion is throttled through a passage defined between said inner and outer orificing surfaces whereby a pressure on said orificing poppet assembly acts to move said sealing poppet assembly to a fully open position.

A relief valve comprising:

• a housing comprising:
• a cylinder portion;
• and
• a body portion;
• a piston slidably disposed in said cylinder;
• a push rod attached to said piston and extending therefrom into said body portion;
• a poppet sleeve disposed in said body portion and in communication with an inlet of said body portion, said poppet sleeve having an inner orificing surface disposed therein;
• a poppet seat disposed adjacent said inlet of said body portion;
• a ring holder attached to said push rod;
• a sealing poppet ring disposed on said ring holder and having a sealing surface adapted for sealing engagement with said poppet seat when in a closed position;
• an orificing poppet ring disposed on said ring holder and having an outer orificing surface thereon adapted for throttling, spaced relationship with said inner orificing surface when in an open position, such that fluid flowing from said inlet of said body portion is throttled through a passage defined between said inner and outer orificing surfaces.

A relief valve comprising:

• housing means for connecting to a pumping system;
• double poppet means disposed in said housing means for sealing when in a closed position and for throttling fluid flow through said housing means when in an open position, said double poppet means comprising:
• sealing poppet means for sealingly engaging a poppet seat located within said housing means when in said closed position, said sealing poppet means being spaced from said poppet seat when in said open position;
• and
• orificing poppet means for throttling fluid flow adjacent an orificing surface located in said housing means when in said open position;
• and
• an inner surface located in said housing means such that an outer surface of said orificing poppet means passes said inner surface in closed relationship thereto as said double poppet means is moved from said closed position to said open position.

A relief valve housing:

• housing means for connecting to a pumping system;
• and
• double poppet means disposed in said housing means for sealing when in a closed position and for throttling fluid flow through said housing means when in an open position, said double poppet means comprising:
• sealing poppet means for sealingly engaging a poppet seat located within said housing means when in said closed position, said sealing poppet means being spaced from said poppet seal when in said open position;
• and
• orificing poppet means for throttling fluid flow adjacent an orificing surface located in said housing means when in said open position, said orificing poppet means having a cross-sectional area greater than said sealing poppet means.

A relief valve comprising:

• housing means for connecting to a pumping system;
• a push rod slidably disposed in said housing means;
• a ring holder attached to said push rod;
• and
• double poppet means disposed in said housing means for sealing when in a closed position and for throttling fluid flow through said housing means when in an open position, said double poppet means comprising:
• sealing poppet means for sealingly engaging a poppet seat located within said housing means when in said closed position, said sealing poppet means being spaced from said poppet seat when in said open position, and said sealing poppet means being characterized by a sealing poppet ring disposed around said ring holder;
• and
• orificing poppet means for throttling fluid flow adjacent an orificing surface located in said housing means when in said open position, said orificing poppet means being characterized by an orificing poppet ring disposed around said ring holder and spaced from said sealing poppet ring.

A relief valve comprising:

• a housing comprising:
• a cylinder portion;
• and
• a body portion;
• a piston slidably disposed in said cylinder;
• a push rod attached to said piston and extending therefrom into said body portion;
• a poppet sleeve disposed in said body portion and in communication with an inlet of said body portion, said poppet sleeve having an inner orificing surface disposed therein;
• a poppet seat disposed adjacent said inlet of said body portion;
• a sealing poppet assembly attached to said push rod and having a sealing surface adapted for sealing engagement with said poppet seat when in a closed position, said sealing poppet assembly comprising:
• a sealing poppet body;
• a sealing poppet ring positioned on said sealing poppet body;
• and
• a first poppet cover disposed adjacent said sealing poppet body and said sealing poppet ring;
• and
• an orificing poppet assembly attached to said push rod and having an orifice surface thereon adapted for throttling, spaced relationship with said inner orificing surface when in an open position, such that fluid flowing from said inlet of said body portion is throttled through a passage defined between said inner and outer orificing surfaces, said orificing poppet assembly comprising:
• an orificing poppet body;
• an orificing poppet ring positioned on said orificing poppet body;
• and
• a second poppet cover disposed adjacent said orificing poppet body and said orificing poppet ring.

A relief valve comprising:

• a housing comprising:
• a cylinder portion;
• and
• a body portion;
• a piston slidably disposed in said cylinder;
• a push rod attached to said piston and extending therefrom into said body portion;
• a poppet sleeve positioned in said body portion and in communication with an inlet of said body portion, said poppet sleeve having an inner orificing surface disposed therein;
• a poppet seat disposed adjacent said inlet of said body portion;
• a sealing poppet assembly attached to said push rod and having a sealing surface adapted for sealing engagement with said poppet seat when in a closed position;
• and
• an orificing poppet assembly attached to said push rod and having an outer orificing surface thereon adapted for throttling, spaced relationship with said inner orificing surface when in an open position, such that fluid flowing from said inlet of said body portion is throttled through a passage defined between said inner and outer orificing surfaces, wherein said sealing and orificing poppet assemblies are substantially identical.

A relief valve comprising:

• a housing comprising:
• a cylinder portion;
• and
• a body portion;
• a piston slidably disposed in said cylinder;
• a push rod attached to said piston and extending therefrom into said body portion;
• a poppet sleeve disposed in said body portion and in communication with an inlet of said body portion, said poppet sleeve having an inner orificing surface disposed therein;
• a poppet seat disposed adjacent said inlet of said body portion;
• a sealing poppet assembly attached to said push rod and having a sealing surface adapted for sealing engagement with said poppet seat when in a closed position;
• an orificing poppet assembly attached to said push rod and having an outer orificing surface thereon adapted for throttling, spaced relationship with said inner orificing surface when in an open position, such that fluid flowing from said inlet of said body portion is throttled through a passage defined between said inner and outer orificing surfaces;
• and
• a wear insert disposed in said poppet sleeve, said inner orificing surface being defined on said wear insert.