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VallandModel C11, C21, C31 -Check Valves

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Applicable standards: Model C11: API 6D and API 6DSS. Model C21: API 6D, Design according to ASME B16.34 or ASME VIII Div. 1 & 2. Pressure Class Range: ANSI Class 150 lbs. to 4500 lbs. API6A Class 3000 PSI to 20000 PSI. Size Range: From 1/2" to 42". Ends design: Flanged (RF/RTJ) - ASME B16.5, ASME B16.47 or MSS SP-44. Compact (Norsok Standard L-005). Butt-Weld (ASME B16.25) and/or Butt-Weld + Pipe. Hubbed according to client Clamp. Special client`s requirements.

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  • Body Design:
    • Model C11: Single piece
    • Model C21: Lugged - Wafer - Double Flanged
  • Bonnet Design: Model C11: Bolted bonnet
  • Seat design: Model C11: Renewable or fixed, Soft sealing or Metal to Metal (c/w hardfacing)
  • Model C21: Integral seat, Metal to Metal sealing
  • Stem Design: Model C21: Retainer or Retainerless
  • Valve operation: Model C11: Lockable disc option available
  • Available Materials: CS, LTCS, SS, Duplex SS, Super Duplex SS, 6Mo, Inconel, Incoloy, Hastelloy, Monel, Titanium
  • NACE MR0175 according to client request.
  • Additional Features: Double Block and Bleed, Normal of Reverse acting, Graphite or V-Pack stem sealing arrangement
  • Testing and Certification:
    • Testing: Hydrostatic and Pneumatic
    • API 598 - API 6D
    • Fire testing: API 6FA, API 607, BS 6755 part 2, ISO 10497
    • Fugitive Emission Test: ISO 15848 - 1 & 2
    • PED 2014/68/UE Mod.H
    • Model C11: Hyperbaric Test for Subsea application