Trunnion Ball Valves Fully Welded Body

Valves suitable for Oil & Gas production, processing, transportation, distribution, chemical and petrochemical refining on above ground and below ground installations.


Trunnion ball valves have the obturator bounded by trunnions which do not allow axial displacements of the ball itself in the flow direction; line pressure compresses the seat onto the ball, the contact between surfaces generates the valve sealing; trunnion standard construction ensure automatic cavity relief in case of overpressure in body cavity; these valves can be selected for a wide range of applications with no specific limits to sizes and pressures. Fully welded constructions, both flanged or with welded ends, are a preferable solution when no maintenance is required on above ground or below ground (buried) installations and allows a real 0 leakage feature.


  • Low Temperature and Low Alloy Carbon Steel
  • Stainless steel, Duplex and Super Duplex
  • Nickel alloys


ConstructionFully welded body
PortReduced bore, full bore or fully piggable
Stem retentionAnti blow-out stem
Leakage rateISO 5208 rate A soft seated, rate D metal seated
Antistatic deviceIncluded, the ball valve design includes an electric conductive connection between the internal parts of the ball valve and the body, providing the anti-static function.
Pressure reliefAutomatic cavity relief to prevent overpressure in body cavity (self-relieving seats)
SealingBi-directional, Double block & bleed (DBB) with sealing in both directions (DIB-1&2 upon request) Metal seated with Tungsten or Chrome Carbide coatings Primary metal secondary soft (PMSS) with differential hardness between the ball and seat to prevent galling of the substrate Soft seated with thermoplastic polymers (Nylon, PEEK, PCTFE), special polymers upon request Elastomers FKM, HNBR, EPDM O-Rings, special elastomers upon request.
DrainDrilled and threaded connections for all sizes
VentDrilled and threaded vent connections for sizes = DN150 (6″) < DN150 upon request
Stem grease injectorsIncluded for all sizes
Seat grease injectorsIncluded for sizes = DN150 (6″), < DN150 upon request
Lifting pointsIncluded for sizes = DN150 (6″) or on valves of 250 kg min
Support feetIncluded for sizes = DN150 (6″) or on valves of 250 kg min
Stem extensionNot foreseen for this model
Valve operationLever, Gear box or Actuator with position indicator and locking device
Material testingPressure containing & controlling parts to EN 10204 3.1 Materials in Sour Service according to NACE MR0175, MR0103, ISO 15156 Non-destructive testing (NDT) to API 6D, ASME B16.34
Valve testingHydrostatic & pneumatic testing to API 6D, ASME B16.34, ISO 5208 (other upon request)


DesignAPI 6D, API 6DSS, API 6A, ASME B16.34, ISO 14313, ISO 10423, ISO 17292
Design pressureASME B16.34, EN 1092-1, ISO 17292
Body wall thicknessASME B16.34, ASME VIII Div. I, ISO 17292
Face to FaceAPI 6D, ASME B16.10 Long pattern
Temperature range-50° to 200°C (-58° to 392°F)
Pressures rangePN20 (ANSI 150) to PN420 (ANSI 2500)
Size rangeDN15 (1/2″) to DN1400 (56″)
End connectionsASME B16.5 = DN600 (24″) Flanged RF,FF,RTJ MSS-SP-44 = DN550 (22″) Flanged RF,FF,RTJ ASME B16.47 A = DN650 (26″) Flanged RF,FF,RTJ ASME B16.25 Butt-Weld BW Clump (HUB)


Safety Integrity LevelSIL 3
Fire SafeAPI 607, API 6FA, BS 6755, ISO 10497-5
Area ClassificationATEX 94/9/EC
Pressure Equipment DirectivePED 97/23/EC
Fugitive EmissionISO 15848/1
ConstructionAPI 6D, API 6DSS

Get In Touch

Drop Us A Message

    Our Contact Details

    • MV Nederland BV / Maverick Valves Manufacturing HQ BV

      Kalundborg 10 5026 SE Tilburg The Netherlands
    • +31 (0) 13 303 3600