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The characterized ball delivers controllable flow characteristics from the nearly closed to the fully open position of the valve. Though port type and valve size affects the rangeability, Flow-Tek characterized balls have a minimum rangeability of 200:1 and can exceed 800:1.
The Vee-Ball valve is a segmented ball valve which features a contoured segmented V-Notch ball. A shearing action between the V-notch ball and the ball seal (figure 1) promotes smooth, nonclogging operation. The unrestricted straight-through flow design provides high capacity for gas, steam, liquids, and fibrous slurries.
These curves are based on constant pressure drop across the valve and are called inherent flow characteristics. Linear - flow capacity increases linearly with valve travel. Equal percentage - flow capacity increases exponentially with valve trim travel.
KTM V-PORT CONTROL BALL VALVE FULL BORE AND REDUCED BORE FEATURES • Rotary-valve design provides shearing action between the V-notch ball and the seat, promoting a smooth, non-clogging operation. • Straight-through flow design provides high capacity for fluids. • With a single-seat design, torque is lower
The angle of the V-shape or V-notch in characterized ball valves alters the flow characteristic. V-port ball valves with 90° and 60° angle balls provide an equal percentage inherent flow characteristic, which is only slightly different compared to full port ball valves.
This instruction manual provides installation, operation, maintenance, and parts information for the Fisher Vee‐Ball V150 (NPS 1 through 12), V200 (NPS 1 through 10), and V300 (NPS 1 through 12) rotary control valves (see figure 1).
Flow-Tek’s control ball valves have been designed to offer maximum flow characteristics that are substantially higher than comparably sized globe valves. The inherent flow pattern of ball valves increases flow rates and in many applications valves smaller than pipeline size can be used, saving the customer money.
Flo-Tite's Ball Control Valves Features a solid stainless steel ball, not a seat insert like many others. Ball Valves have an inherent equal percentage characteristic flow curve which is very desirable for a majority of control applications.
The Series WE07 2-Piece Flanged Stainless Steel V-Ball Valves incorporate a V-port ball valve for impressive flow rates with minimal pressure drop. Quarter turn control ball valves are compact, lighter weight and much less expensive than comparable sized globe valves and segmented control valves. They also offer bubble tight shut off with zero ...
A v-port ball valve has an equal percentage characteristics curve (Figure 2 labeled B), which increases flow control precision. An equal percentage characteristic curve approaches a linear curve, but is not quite a linear curve, as the max flow percentage slope increases as the valve opens.
What are V-Port Ball valves? A V-Port Ball Valve has either a 'v' shaped seat or a 'v' shaped ball. This allows the orifice to be opened and closed in a more controlled manner, with a closer to linear flow characteristic. This type of valve is also known as a control valve because the flow velocities need to be controlled depending on the ...
Precise Flow Control. Precision machined V-ball valves are available with 60° and 90° V openings and offer equal percentage flow characteristics. As the ball rotates, desired flow rates can be achieved by positioning the ball anywhere between 0° and 90°.
V-Notch Ball. The Vee-Ball valve with its V-notch ball provides positive shearing action and a nearly equal percentage flow characteristic. It provides non-clogging, high-capacity flow control of gas, steam, clean and dirty fluids, abrasive chemicals, and fibrous slurries.
VALTORC V-CONTROL BALL VALVE FLOW COEFFICIENT CHARTS to "a 1/2"t012" Percent and le of Ball Rotation 50 0.98 .19 1.83 —2.05 1.57 1.62 1.83 2.92
A v-port ball valve's flow characteristics are different from that of standard port ball valves. The fluid flow through a v-port ball valve increases linearly with an increase in shaft rotation. V-ball control valves have high strength to withstand the high velocity of fluids flowing through the valves.
This blog will give you an overview of predicting flow characteristic curves for different angles of V-port in ball valve design in the control application. Preview and the capabilities of Autonomous valve CFD to carry out the design of experiments.
This section first presents the flow characteristics of the original V-ball valve and then compares them with those of the improved V-ball valve. Secondly, the flow and loss coefficients under small valve openings are presented and analyzed.
Often used for controlled flow applications in gas transmission lines, gas distribution, and liquid pipelines. Temperatures from -40 to 204 °C, depending on seal type. Large, flanged throttling ball valves. Used for demanding pipeline applications such as pump bypass and pipeline take-off.
We have a complete line of V-Port Ball Valves, V-Ball, V-seat and slotted seat control valves providing precision throttling control for a wide range of applications. As with our standard ball valves, V-characterized seated valves offer equal percentage flow characteristics.
The solid HD ball seal construction provides long service life in demanding applications. Precise contouring of the Vee-Ball provides a modified equal percentage flow characteristic. Materials are available for applications involving sour liquids and gases.