Fluid end

1. A body for a fluid end, comprising:

a metal forging having:

a horizontal passage for receiving a reciprocating plunger at one end thereof;

a vertical passage intersecting said horizontal passage and having a suction valve seat deck at its bottom and a discharge valve seat deck at its top;

a discharge passage intersecting the top of said vertical passage;

a pair of pivot pins affixed to the bottom of said metal forging for attaching a suction manifold to the bottom of said metal forging.

2. A fluid end, comprising:

a body having a horizontal passage, a vertical passage intersecting said horizontal passage, and a discharge passage intersecting the top of said vertical passage;

a reciprocating plunger located in one end of said horizontal passage and a pressure relief valve at the other end thereof;

a suction valve located at the bottom of said vertical passage;

a discharge valve located at the top of said vertical passage;

a suction manifold pivotally secured to the bottom of said body and being in fluid communication with said vertical passage; and

a pair of pivot pins affixed to said body and a pair of rings loosely encircling said pivot pins and affixed to said suction manifold.

3. The fluid end according to claim 2 wherein said body has a pair of lifting eyes formed in the top thereof.

4. The fluid end of claim 2 wherein the body is a pump fluid end body;

said body having a plurality of horizontal passages and a plurality of vertical passages;

each of said vertical passages intersecting a corresponding horizontal passage.

5. The pump fluid end of claim 4 wherein said body has suction valve seat decks for supporting suction valve seats of said suction valve and discharge valve seat decks for supporting discharge valve seats of said discharge valve, the bottom of said suction valve seat decks and the bottom of said discharge valve seat decks slope upwardly at an angle of about 30 °; and

a pair of pivot pins affixed to the bottom of said body for attaching a suction manifold to the bottom of said body.

6. The pump fluid end of claim 5 wherein said suction valve seat is a tube with open, top and bottom surfaces;

a piston having a head engaging the top surface of said suction valve seat and a piston stem extending downwardly from said head through said valve seat, said stem having a keeper pin transverse aperture adjacent an end opposite said head; and

said valve has an engaged position wherein in said engaged position a keeper pin is positioned within said transverse aperture to hold a valve keeper from sliding off the valve stem.

7. The pump fluid end of claim 6 wherein said valve stem has adjacent to said end a lock pin aperture below and at a right angle to said keeper pin aperture, said lock pin aperture intersects a bottom portion of the keeper pin aperture to permit a lock pin to lock a peripheral grooved keeper pin in place.

8. A piston and a valve seat for said suction valve of claim 2 comprising:

an opening formed by said valve seat, said opening opens through a top and a bottom surface of said valve seat;

a piston having a head for engaging said top surface of said valve seat and a stem for extending downwardly from said head through said valve seat opening, said stem having a first transverse aperture aperture extending through the stem, and said stem having a second transverse aperture.

9. A high pressure pump piston for mating with the valve seat described in claim 8 , wherein said pump piston comprises:

a stem having an end opposite a head;

a keeper pin transverse aperture passing through said stem, and a lock pin aperture adjacent said end, said lock pin aperture intersects a portion of the keeper pin aperture and opens into said keeper pin aperture, said lock pin aperture being positioned relative to said keeper pin aperture so when a keeper pin is in place in the keeper pin aperture, and a lock pin is in place in the lock pin aperture, the lock pin and keeper pin interface with one another.

10. A fluid end, comprising:

a body having a horizontal passage, a vertical passage intersecting said horizontal passage, and a discharge passage intersecting the top of said vertical passage;

a reciprocating plunger located in one end of said horizontal passage and a pressure relief valve at the other end thereof;

a suction valve located at the bottom of said vertical passage;

a discharge valve located at the top of said vertical passage;

a suction manifold pivotally secured to the bottom of said body and being in fluid communication with said vertical passage; and

a lever arm-receiving socket secured to said manifold for manipulating said manifold.

11. The fluid end according to claim 10 wherein said body has a suction valve seat deck for supporting a suction valve seat of said suction valve and a discharge valve seat deck for supporting a discharge valve seat of said discharge valve, the bottom of said suction valve seat deck and the bottom of said discharge valve seat deck slope upwardly at an angle of about 30 °.

12. A pump fluid end body for a fluid end, comprising:

a metal forgoing having:

a plurality of horizontal passages and a plurality of vertical passages;

each of said vertical passages intersecting a corresponding horizontal passage and having a seat deck at its bottom and a discharge valve seat deck at its top;

a plurality of discharge passages with each intersecting a top of a corresponding vertical passage;

a pair of pivot pins affixed to the bottom of said body for attaching a suction manifold to the bottom of said body.

13. The pump fluid end body of claim 12 wherein said body has a pair of lifting eyes formed in the top thereof.

14. The pump fluid end body of claim 13 wherein each of said vertical passages has a suction valve seat deck for supporting a suction valve seat of said suction valve and each of said horizontal passages has a discharge valve seat deck for supporting a discharge valve seat of said discharge valve, and the bottom of said suction valve seat decks and the bottom of said discharge valve seat deck slope upwardly at an angle of about 30 °.