Valve guide and spring retainer assemblies

A plunger pump housing comprising:

• a suction bore comprising a first portion with substantially circular cross-sections, a second portion comprising a cylindrical area followed by an outwardly flared transition area, a suction bore shoulder between said first and second portions, and a first centerline;
• a discharge bore comprising a first portion with substantially circular cross-sections, a second portion comprising a transition area, and a second centerline, said first and second centerlines being colinear;
• a plunger bore comprising a proximal packing area and a distal transition area, said packing area having substantially circular cross-sections and a third centerline, said third centerline being coplanar with said first and second centerlines;
• and
• an access bore comprising a distal retainer portion with circular cross-sections, a proximal transition area, an access bore shoulder between said proximal transition area and said distal retainer portion, and a fourth center line, said fourth centerline being colinear with said third center line;
• wherein said suction bore outwardly flared transition area and said suction bore cylindrical area each have at least one elongated cross-section substantially perpendicular to said first centerline and with a long axis substantially perpendicular to a plane containing said first, second, third and fourth centerlines;
• wherein said discharge bore transition area has at least one elongated cross-section substantially perpendicular to said second centerline and with a long axis substantially perpendicular to a plane containing said first, second, third and fourth centerlines;
• wherein said plunger bore transition area has at least one elongated cross-section substantially perpendicular to said third centerline and with a long axis substantially perpendicular to a plane containing said first, second, third and fourth centerlines;
• and
• wherein said access bore proximal transition area has at least one elongated cross-section substantially perpendicular to said fourth centerline and with a long axis substantially perpendicular to a plane containing said first, second, third and fourth centerlines.