Butterfly valves are more compact. They require less space and are lighter. For example a 6 in. V-5252-19 with a Cv = 350 weighs approximately. 200 pounds. 1. Butterfly valves have lower valve recovery coefficients, Km, than globe valves. The value of Km relates to cavitation potential. Large values are desirable. 2.

Flow rates of butterfly valves from 50mm to 1200mm at different degrees of opening. Below is a table of the flow rates for Butterfly Valves at different opening stages between zero degrees fully closed and ninety degrees fully open. Please note that a CV. 14, 350, 6, 338, 715, 1549, 2761, 4568, 7230, 10844, 11917.

S - Specific gravity of the pipeline media. 2 Calculate Cv using above formula. 3 Select valve size between 30 - 60º. 4 Do not exceed maximum velocity Liquids 20 ft./second. Gases 15,000 ft./minute. V = S x.321 liquid only. A. A = Area of pipe in square inches. FLOW DATA. Cv Values for DJ Series Butterfly Valves. 0.

Butterfly valves and typical flow coefficients - C v. The table below can be used to indicate butterfly valves and their flow coefficients at different open or closed positions. Manufacturers data should always be checked before actual use. 6, 150, 1125, 844, 450, 203, 75, 80. 8, 200, 2110, 1583, 844, 380, 70, 75.


Engineering Information. For PDC Butterfly Valves. Valve Sizing Cv sizing is the most widely used method for valve sizing, today. By using the Cv method. thrust, but no more, even if available during test. Allow time for leakage flow to stabilize. VI. Not to exceed amounts shown in table. 2* based on port diameter. *Consult.

Cv = Valve Coefficient. Butterfly Valve Cv Values. Full 90° Open. Cv. Valve Size. Cv at Various Butterfly Disc Positions. GPM = Water Flow Rate in Gallons per Minute.

The chart below records this Cv factor for the Flowseal valve classes and sizes at ten degree increments between open and closed. The values. Degree Open % Full Cv, 10° 1.5%, 20° 6%, 30° 14%, 40° 25.2%, 50° 38%, 60° 55%, 70° 75%, 80° 97%, 90° 100%. 2", 150, 1.5, 6, 14, 25, 39, 56, 76, 99, 102. 300, 1.4, 6, 13, 24.

Flow coefficient Cv Kv references for butterfly valve. Cv Flow Coefficient for butterfly valves. Cv Flow Coefficient of Butterfly valves depending on the opening position. 5, 125, 2070, 1416, 805, 459, 284, 172, 98, 44, 6. 6, 150, 2786, 1873, 1065, 607, 376, 227, 130, 59, 7. 8, 200, 5191, 3402, 1935, 1147, 714, 427, 244, 106.


Engineering Information. For PDC Butterfly Valves. Valve Sizing Cv sizing is the most widely used method for valve sizing, today. By using the Cv method. thrust, but no more, even if available during test. Allow time for leakage flow to stabilize. VI. Not to exceed amounts shown in table. 2* based on port diameter. *Consult.

Cv = Valve Coefficient. Butterfly Valve Cv Values. Full 90° Open. Cv. Valve Size. Cv at Various Butterfly Disc Positions. GPM = Water Flow Rate in Gallons per Minute.

The chart below records this Cv factor for the Flowseal valve classes and sizes at ten degree increments between open and closed. The values. Degree Open % Full Cv, 10° 1.5%, 20° 6%, 30° 14%, 40° 25.2%, 50° 38%, 60° 55%, 70° 75%, 80° 97%, 90° 100%. 2", 150, 1.5, 6, 14, 25, 39, 56, 76, 99, 102. 300, 1.4, 6, 13, 24.

Flow coefficient Cv Kv references for butterfly valve. Cv Flow Coefficient for butterfly valves. Cv Flow Coefficient of Butterfly valves depending on the opening position. 5, 125, 2070, 1416, 805, 459, 284, 172, 98, 44, 6. 6, 150, 2786, 1873, 1065, 607, 376, 227, 130, 59, 7. 8, 200, 5191, 3402, 1935, 1147, 714, 427, 244, 106.


Cv value of High Performance Butterfly Valve. Class 150. Calculated for Series 400 ABZolute Seal. 2. 5. 12. 19. 32. 45. 65. 81. 88. 2. 50. Degree of Opening inch mm. 10°. 20°. 30°. 40°. 50°. 60°. 70°. 80°. 90° size. 2.5. 3. 4. 5. 6. 8. 10. 12. 14. 16. 18. 20. 80. 100. 125. 150. 200. 250. 300. 350. 400. 450. 500. 65. 22. 550. 24.

Cv = Q. Q --- Fluid Volume that pass the valve per minute US gal/min. P --- Pressure Difference between import and export of the valve psi. G --- Density of Fluid. With the above expressions, You may calculate the flow volume that pass the a valve or pressure loss between the two end of a valve. Example 1 A 6" butterfly.

Nominal Diameter, Max Cv, Max Kv. Inch, mm, gpm.psi, m³/hr 6″, 150, 950, 822. 8″, 200, 1725, 1492. 10″, 250, 2800, 2422. 12″, 300, 4175, 3611. 14″, 350, 5850, 5060. 16″, 400, 7850, 6790. 18″, 450, 10200, 8823. 20″, 500, 12900, 11159. 24″, 600, 19375, 16759. 26″, 650, 23200, 20068. 28″, 700.

Butterfly Valve Generated Noise Calculations On Standard and Fluted Disc For Stealth Valve & Controls Ltd. 1273 North Service Road East Unit F6 Oakville ON L6H 1A7


I'll round off the numbers for discussion. Two 1000 GPM pumps, Lead/Lag, Two 500 GPM chillers. Outlet pipe of the chillers is 6", bypass piping is also 6".

Does anyone know of a good low cost control valve sizing program available? If so please provide details. If not, know of

Atomac ARV2 Ball Check Valve. The ARV2 is a ball check valve, under normal flow the valves solid PTFE ball is pushed away from it’s seat and fluid flows through the.



6 butterfly valve cv curve:

Rating: 99 / 100

Overall: 89 Rates