Features: 1.Sealing is energized by flow fluid pressure, sealing performance gets better while pressure increasing. 2.Hard-faced sealing surface and sulfur-resistant core material assure fine performance of wear-resistant and corrosion-resistant. 3.Integral forged body with fine mechanical properties. 4.Check valve shall be hydro tested prior to delivery for safe performance. Specifications: Product Name: API 6A Swing Check Valve, Lift Check Valve, One-Way Valve, Non-Return Valve Nominal Bore: 1-13/16" - 7-1/16" Material: AISI 4130 (Integral Forged) End Connection: API 6A Flange Standards Applied: API Spec 6A, API 16C, NACE MR0175 Pressure Rating: 2000 PSI to 15000 PSI Material Class: AA, BB, CC DD, EE, FF Temp Class:� L, P, R, S, T, U, V Performance Requirement: PR1, PR2 Product Specification Level: PSL1, PSL2, PSL3, PSL4 Paint Color: Red or Customized Application: Mud Choke Manifold, Kill Manifold, Wellhead Christmas Tree Connection