GENERAL CONSTRUCTION

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 preferable solution when no maintenance is required on above ground or below ground (buried) installations and allows a real 0 leakage feature.

MATERIALS OF CONSTRUCTION

Low Temperature and Low Alloy Carbon Steel
Stainless steel, Duplex and Super Duplex
Nickel alloys
STANDARD FEATURES
Construction： Fully welded body
Port： Reduced bore, full bore or fully piggable
Stem retention： Anti blow-out stem
Leakage rate： ISO 5208 rate A soft seated, rate D metal seated
Antistatic device： Included, 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 relief ：Automatic cavity relief to prevent overpressure in body cavity (self-relieving seats)
Sealing： Bi-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.
Drain： Drilled and threaded connections for all sizes
Vent： Drilled and threaded vent connections for sizes ≥ DN150 (6") < DN150 upon request
Stem grease injectors： Included for all sizes
Seat grease injectors： Included for sizes ≥ DN150 (6"), < DN150 upon request
Lifting points： Included for sizes ≥ DN150 (6") or on valves of 250 kg min
Support feet： Included for sizes ≥ DN150 (6") or on valves of 250 kg min
Stem extension：Available upon request
Pups pieces ：Available upon request
Valve operation： Lever, Gear box or Actuator with position indicator and locking device
Material testing： Pressure 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
Welding & NDT according to ASME IX; WPS, PQR, WPQ as per project requirements
Valve testing： Hydrostatic & pneumatic testing to API 6D, ASME B16.34, ISO 5208 (other upon request)

TECHNICAL DATA

Design： API 6D, API 6DSS, ASME B16.34, ISO 14313, ISO 17292
Design pressure： ASME B16.34, EN 1092-1, ISO 17292
Body wall thickness ASME B16.34, ASME VIII Div. I, ISO 17292
Face to Face： API 6D, ASME B16.10 Long pattern
Temperature range： -50° to 200°C (-58° to 392°F)
Pressures range： PN20 (ANSI 150) to PN420 (ANSI 2500)
Size range： DN15 (1/2") to DN1400 (56")
End connections： ASME 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