Full Port Trunnion Ball Valve Full bore Forged Steel Gear Operated
For the full bore valve, the bore diameter in the ball has the same
internal diameter as the pipe, whereas a reduced bore valve has a
smaller bore diameter than the internal diameter of the pipework it
is on.
The full port design ensures minimal flow resistance, pressure drop
and cavitation. Full-port ball valves are used where their low flow
resistance is of value such as on pump suction pipes, where a
pressure drop can affect pump performance. They are also used in
flows containing mixed liquids and solids where flow restrictions
can cause separations in the materials causing buildups and thus
reducing the flow in the pipes.
Another reason for full-bore valves is for cleaning. It is common
practice in the oil and gas industry to push a ‘pig’ through a
piping system. A ‘pig’ looks like a ball that gets pushed through
piping system to clean the inside of the pipes and valves. A
full-ported valve is critical for this type of practice since a pig
would get stuck on a reduced ported valve.
On the other hand, reduced-port ball valves are used where pressure
drop, turbulence in the flow and material characteristics are not a
concern. They also have the advantages of smaller size and lower
cost.
Features of Trunnion Mounted Ball Valves:
Trunnion Mounted Ball for low operation torque
Floating Spring Loaded Seat
Double Block and Bleed (DBB)
Split Body, End Entry
2-Piece or 3-piece Body
Full Port for Pigging Operation
Fire Safe to API 607
Antistatic Device
Anti-blowout Stem
Emergency sealant sealing device
Automatic Pressure Relief in Middle Cavity of Valve
Gear Operation or Actuator Available
Optional Direct Mounting to ISO 5211
Optional Locking Device
Optional Stem Extension
Applicable Standards of Trunnion Mounted Ball Valves:
a) Design & Manufacture: API 6D, BS 5351, API 608, ISO 17292, MSS
SP-72
b) Fire-safe: API 607, API 6FA
c) Face to Face: API B16.10, API 6D, EN 558, DIN 3202
d) End Connection: ASME B16.5, EN 1092, JIS B2220, ASME B16.25
e) Test and Inspection: API 6D, EN 12266, API 598
