Trunnion Ball Valve Top Entry – Rising Stem

Trunnion Ball Valve Top Entry – Rising Stem

Operating Description: The movement of the ball tilted from the seat before starting the rotation eliminates the wear of the seat seal and allows for smooth movement and low torque. The same tilting movement when starting the opening allows for a cleaning flow all around ball surface; this flow automatically flushes the ball surface removing eventual dirt particles from the sealing areas.

MATERIALS OF CONSTRUCTION: Low Temperature and Low Alloy Carbon Steel, Stainless steel, Duplex and Super Duplex, Nickel alloys

Model no. VTO

Specially designed for Molecular Sieve application it can be used effectively in dirty services. The ball movement off the seats allows a cleaning action of the ball surface thus eliminating the friction during opening / closing actions and allowing for reduced torque / thrust during operation.

Trunnion Ball Valve Top Entry - Rising Stem

GENERAL CONSTRUCTION
 

ERREESSE Top Entry Rising Stem Ball valves are suitable for Molecular sieve dehydration, dryer switching, suction and discharge isolation, heat transfer, flowlines, Emergency shutdown, etc.

 

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

 

APPLICATIONS
 

STANDARD FEATURES
 
Construction One piece bolted bonnet
Port Reduced bore, full bore or fully piggable
Stem retention Anti blow-out stem
Sealing Single seated bi-directional, with preferential flow direction, to avoid pressure trapped between the seats. Metal seated with Tungsten or Chrome Carbide coating; Soft seated with thermoplastic polymers (Nylon, Devlon, PEEK, PCTFE), special polymers upon request
Leakage rate ISO 5208 rate A soft seated, rate B,C, D metal seated
Operating Description The movement of the ball tilted from the seat before starting the rotation eliminates the wear of the seat seal and allows for smooth movement and low torque. The same tilting movement when starting the opening allows for a cleaning flow all around ball surface; this flow automatically flushes the ball surface removing eventual dirt particles from the sealing areas
Grease injectors Available on request on both seats and stem
Drain / Vent Drilled and threaded connections for all sizes, Vents for sizes below DN
Vent Drilled and threaded vent connections 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 for applications in low/cryogenic temperature applications or for high temperature application
Valve operation Handwheel, 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
Valve testing Hydrostatic & pneumatic testing to API 6D, ASME B16.34, ISO 5208 (other upon request)

TECHNICAL DATA
 
Design API 6D, API 600, ASME B16.34, ISO 14313, ISO 10423, ISO 17292
Design pressure ASME B16.34, API 600
Body wall thickness ASME B16.34, ASME VIII Div. I, ASME VIII Div. 2, ISO 17292, API 600
Face to Face API 6D, ASME B16.10 Long pattern
Temperature range -196° to 600°C (-320° to 1112°F)
Pressures range PN20 (ANSI 150) to PN420 (ANSI 2500)
Size range DN50 (2") to DN600 (24")
End connections ASME B16.5 ≤ DN600 (24") Flanged RF, FF, RTJ
MSS-SP-44 = DN550 (22") Flanged RF, FF, RTJ
ASME B16.25 Butt-Weld BW
Clump (HUB)

 

APPROVALS
 
Safety Integrity Level SIL 3
Fire Safe API 607, 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, ISO 15848/2
Construction API 6D, API 6DSS