Trunnion Ball Valve Side Entry Split Body – High temperature

Trunnion Ball Valve Side Entry Split Body – High temperature 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 against the ball, the contact between surfaces generates the valve sealing. Trunnion standard construction ensures 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, pressure and temperature range. Construction: Two or Three piece bolted body;
Port: Reduced bore, full bore or fully piggable; 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

Model no. VS7-VS8-VS9

Metal seated with metal sealing and stem extension for steam service and high temperature applications. The special design is suitable for service from 250°C up to 700°C and over.

Trunnion Ball Valve Side Entry Split Body - High Temperature

 

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 against the ball, the contact between surfaces generates the valve sealing. Trunnion standard construction ensures 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, pressure and temperature range.

 

MATERIALS OF CONSTRUCTION
  • Low Alloy Steel
  • Stainless steel
  • Other materials can be used upon request

 

APPLICATIONS
 

STANDARD FEATURES
 
Construction Two or Three piece bolted body
Port Reduced bore, full bore or fully piggable
Stem retention Anti blow-out stem
Leakage rate ISO 5208 rate A, B, C or D during hydrostatic test
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 Chrome Carbide Coating and Stellite coating depending on the application and temperature range Metal seat sealing with differential hardness between ball and seat to prevent galling of the substrate Metal sealing by means of graphite packings on all valve seal areas
Drain Drilled and threaded connections for all sizes
Vent Drilled and threaded vent connections for sizes ≥ DN150 (6") < DN150 upon request
Grease injectors Available on request for both seats and stem
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 High Temperature stem extension as standard to allow for thermal dissipation of excess temperature and allow for the seals to work properly at a lower temperature than that of the process fluid in bore
Valve operation Lever, Gear box or Actuator with position indicator and locking device
Material certification and 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
Valve testing Hydrostatic & pneumatic testing to API 6D, ASME B16.34, ISO 5208
High temperature testing available on request

TECHNICAL DATA
 
Design API 6D, API 6DSS, SME B16.34, ISO 14313, ISO 10423, ISO 17292
Design pressure ASME B16.34, EN 1092-1, ISO 17292
Body wall thickness ASME B16.34, ASME VIII Div. I-II-III, ISO 17292
Face to Face API 6D, ASME B16.10 Long pattern
Temperature range -29° to > 700°C (-20° to > 1292°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
Clump (HUB)

 

APPROVALS
 
Safety Integrity Level SIL 3
Fire Safe Valves are intrinsically fire safe as no soft parts are incorporated in valve design. In case required it can be supplied according to API607, API 6FA, BS 6755, ISO 10497-5
Area Classification ATEX 94/9/EC
Pressure Equipment Directive PED 97/23/EC
Fugitive Emission ISO 15848/1
Construction API 6D
Other GOST, EAC