Gate Valve Cv Values

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In metric units the same coefficient often called the flow factor is kv and corresponds to the flow rate of water in. The closure member of gate valves either stops or allows flow through the valve and acts somewhat like the opening or closing of a gate and is called appropriately the gate valve.

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220 needle valve gate valve full open cv value mm 15 20 25 inch 1 2 3 4 1 port size mm 6 15 6 15 full open cv value 0 7 4 5 0 7 6 0 full open cv value.

Gate valve cv values. Size 150 300 600 900 1500 2500 2 42 42 42 45 38 25 2 5 67 67 67 3 100 100 100 90 95 65 4 185 185 185 170 170 1005 6 440 440 440 400 395 265. Cv value for valves. Flow velocity regular port cv flow velocity for fully open 1 for fully open 1 ft sec water 60ºf ft sec water 60ºf 1 1 2 93 16 31 55 9 89 32 7 20 2 170 30 57 101 9 43 60 6 87 2 1 2 273 48 92 161 9 08.

C v calculator for valve sizing. For fresh water with p1 0 3 mpa p2 0 25 mpa flow rate 100 m3 h the calculated cv will be 164. The flow coefficient for a control valve which in full open position passes 25 gallons per minute of water with a one pound per square inch pressure drop can be calculated as.

Cv is in imperial units. Percentage is based on turns of stem from closed to fully open valve. Valve size gate globe stop check swing check tilting disc check and lift check full port cv t pattern cv y pattern cv full port cv min.

Gallons per minute that passes through the valve at a pressure drop of 1 psi at 68 f. Zeta k values valve in semi open positions. Cv usg min 1 psi.

Gpm cv value of cast gate valve class size 150 300 600 900 1500 2500 nps cv cv cv cv cv cv 1 2 16 16 16 16 16 12 3 4 38 38 38 32 32 21. Flow kv values and zeta values for gate valves resilient seated appendix 6 copyright avk group a s 2018 avk international a s bizonvej 1 dk 8464 galten www avkvalves eu app6 rev ac 2018 04 17. Cv is the volume of water in u s.

Also the cv varies across control valves because each valve lets the flow pass through differently. Gate valve 0 2 quick open comparison of cv value. C v 25 gpm 1 1 psi 1 2 25 flow coefficient c v for saturated steam since steam and gases are compressible fluids the formula must be altered to accommodate changes in.

If 80 mm 507v is selected the rated cv is 176. Gate valve description gate valves are primarily designed for on off services when a straight line flow of fluid and minimum restriction is desired. Reserves the right to revise without notice unit.

The above information is for reference only. Example flow coefficient liquid. W if the result of the cv calculation is over 80 compared to the full cv value select a valve one size larger.

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