In-line Check Valves

Our In-Line Check Valves are suitable for air, gas, vapour and liquid. Applications include Flow Lines and/or Injection Lines such as Chemical or Lubrication. Body material choices are Brass or Stainless Steel. Ball and Spring are Stainless Steel as standard.


  • Buna O-Ring is standard
  • Viton O-Ring is available on request
  • Stainless Steel Ball and Spring are standard
  • Available in Female x Female End Connections
  • Rated to 6,000 psi for Stainless Steel
  • Rated to 3,000 psi for Brass


Tulsa Valve Product Summary


ID Inlet Outlet Body Material Working Pressure
1 1/4 FNPT 1/4 MNPT Brass 3000 PSI Max
2 1/4 FNPT 1/4 MNPT Stainless Steel 6000 PSI Max
3 1/8 FNPT 1/8 MNPT Brass 3000 PSI Max
4 1/8 FNPT 1/8 MNPT Stainless Steel 6000 PSI Max


ID Width
1 2.875