Yale Unions

Our Yale union design allows valves and other fittings to be removed easily from the production line.


The ease of removal of our Yale union from the production line offers an advantage when installing the fitting in a short section of line, as it is not necessary to “spread” or bend the line when removing the fitting. Our unions can be manufactured to your material specifications: carbon steel, alloy steel, or ductile iron.


  • Figure 110 “Insulating Unions”
  • Figure 210 “Blanking Union”
  • Figure 300I “Insulating Unions”
  • Figure 300 “Flat Face”
  • Figure 310 “Threaded Choke”
  • Figure 800 “Quick Stab”
  • Figure 800R “Quick Stab”

Yale Union Specifications

Maximum working pressure range 500 to 12,500 psi
Maximum temperature 500 °F (260 °C)
Size range ¼ to 8 in.
A closeup of a Yale Union piece