V-port ball valve application

Overview – What is a V-Port Ball Valve?

A V-port ball valve (also called a V-notch ball valve) has a ball with a V-shaped cut on the port.
It can both shut off and regulate flow precisely.

✅ Main Features

• Flow characteristic: approximately equal-percentage (ideal for throttling control).

• Tight sealing: available in soft or metal seats (Class V–VI leakage).

• Shearing ability: the sharp V-edge can cut through fibers, slurry, or viscous media.

• High capacity: large Cv and low pressure drop.

• Typical media: gas, steam, water, slurry, oil, pulp, and other mixed fluids.

⚙️ 2. Key Selection Parameters

(1) Valve Size (DN / NPS)

Select based on process flow.
Use the flow coefficient (Cv) to size the valve:

$$Q = C_v \times \sqrt{\frac{\Delta P}{SG}}$$

Where:

• $Q$ = flow rate (m³/h)

• $C_v$ = valve flow coefficient

• $\Delta P$ = pressure drop (bar)

• $SG$ = specific gravity of fluid

Note: Because V-port ball valves have a high Cv, you can often choose a size one step smaller than the pipeline diameter.

(2) Pressure Rating

Match the system pressure:

• Common standards: PN16, PN40, PN64, or ANSI 150/300/600.

• The valve’s design pressure should be ≥ 1.1 – 1.5 × maximum working pressure.

(3) Temperature & Seat Material

(4) Body & Ball Materials

(5) Flow Characteristic

Most V-port valves provide:

• Equal-percentage characteristic → best for general control.

• Linear characteristic → for precise proportional control.

(6) Actuation Type

For modulating control, choose pneumatic + positioner (4-20 mA) or electric control actuator.