CPS Back Check Valve is a conventional (tubing retrievable) check valve that comes in 1" or 1-1/2" O.D. The check valve is installed externally on conventional mandrels and chemical injection subs. Reverse flow checks prevent gas and fluid flow from the tubing back into the casing annulus. In operation, the reverse flow check valve utilizes a dual seating system.


  • Stainless steel SS 316L
  • 5,000 PSI test pressure
  • Nickel alloy X-750 spring
  • Compatible with other industry standard conventional (tubing retrievable) mandrels
  • CV check is required when utilizing flow with a screen orifice