This allows for further control because from the tapered opening from aoaltwar's blog

A V port ball valve has the 'v' shaped ball or perhaps a 'v' shaped seat. This allows for linear as well as equal percentage flow characteristics. When the valve influences closed position and opening is commenced the tiny end with the 'v' is opened first allowing stable flow control with this stage view this site . This type of design uses a generally better construction because of higher velocities with the fluids, that may damage a typical valve. When machined correctly these are typically excellent control valves, offering superior leakage performance.

Many industries encounter trouble with residues within the ball valve. Where the fluid was created for human consumption, residues will also be health hazard, and once where the fluid changes every once in awhile contamination of just one fluid with another may occur. Residues arise because within the half open position on the ball valve a gap is made between the ball bore and the body where fluid is usually trapped. To avoid the fluid engaging in this cavity, the cavity needs to be plugged, which is usually done by extending the seats in this particular manner that it must be always in exposure to the ball. This type of ball valve is termed Cavity Filler Ball Valve.

When you would like precise treating your application, a globe valve may well be more accurate when compared to a ball valve. Globe valves are seen as the industry standard for control valves because they're good at regulating flow, whereas ball valves are better for on/off control without pressure drop.

V-Port Ball ValveIf you need to use a ball valve to manipulate your process, you may want to consider a variety of ball valves depending on the job for more . A trunnion or v-port ball valve will work better and enable for more accurate adjustability in a few scenarios.

Trunnion ball valves produce an additional mechanical anchoring in the ball at the pinnacle and bottom. They employ a splined or keyed stem connection that eliminates any play relating to the ball and stem. V-port ball valves have a very ‘V’ shaped ball instead on the standard round hole. This allows for additional control because with the tapered opening, allowing for much more linear flow.

In-Line Repair. You can repair 3-piece valves without complete removal through the line, unlike 1- and 2-piece ball valves. Simply remove three from the four cap screws on all sides, and the body swings out for replacement from the seats and seals.
Protected Seat. The Tri-Pro Series valves also boast a protected seat and encapsulated body seal design. This isolates and protects the seats and seals through the flow path, preventing cold flow and allowing long-term performance in demanding applications.