Liquid Sizing Extended

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For reference only
Pressure Regulator - Pilot Operated and Spring Loaded
Regulator Type Trim Type Connection Size (in.)Trim Size (in.) CfCv at Stem Travel (% Open)
10%20%30%40%50%60%70%80%90%100%
Pilot Operated *
Equal Percentage11/20.750.40.70.91.31.82.53.23.94.55
Equal Percentage110.741.11.82.43.44.86.68.510.211.913.2
Equal Percentage21 1/40.751.82.83.95.47.710.513.616.21921
Equal Percentage22**0.8446.28.612.117.223.530.436.342.547
Equal Percentage220.754.46.99.513.419.12633.640.24752
Equal Percentage31 5/80.822.94.56.28.812.5172226.330.734
Equal Percentage330.759.915.621.530.242.958.675.790.4105.7117
Equal Percentage420.804.77.310.114.220.227.535.642.549.755
Equal Percentage440.7517.827.938.654.277105.2135.9162.2189.8210
Equal Percentage630.8010.2162230.94460.177.792.7108.4120
Equal Percentage660.7540.663.888.1123.8176240.4310.6370.7433.7480
Spring-Loaded Back Pressure
Equal Percentage21 1/40.841.32.446.710.414.416.919.722.124
Equal Percentage220.7546.28.612.117.223.530.436.342.547
Equal Percentage31 5/80.822.94.56.28.812.5172226.330.734
Equal Percentage330.759.915.621.530.242.958.675.790.4105.7117
* For All Non-Venting Back Pressure and Non-Venting Pressure Reducing Regulators, small pressure drops reduce the Cv of the valve:
  • Pressure drops of 3 psi or less, multiply valve Cv by 0.5
  • Pressure drops from 3.01 to 6 psi, multiply valve Cv by 0.8
  • Pressure drops from 6.01 to 12 psi, multiply valve Cv by 0.9
** with Removable Seat
High Pressure Stem Guided Non-Balanced Control Valve and Regulator
  Trim Type Connection Size (in.) Trim Size (in.) Cf Cv at Stem Travel (% Open)
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Equal Percentage 1 1/8 0.73 0.01 0.02 0.03 0.04 0.06 0.09 0.15 0.26 0.32 0.34
Equal Percentage 1 1/4 0.66 0.05 0.10 0.14 0.19 0.29 0.58 0.93 1.27 1.63 1.99
Equal Percentage 1 1/2 0.78 0.16 0.32 0.47 0.60 0.93 1.74 2.99 4.41 5.65 6.49
Linear (Nominal) 1 1/8 0.58 0.1 0.4 0.5 0.7 0.9 1 1 1 1.1 1.1
Linear (Nominal) 1 3/16 0.59 0.2 0.5 0.77 1 1.3 1.4 1.5 1.5 1.5 1.5
Linear (Nominal) 1 1/4 0.78 0.28 0.72 1.11 1.5 1.8 1.95 2.08 2.13 2.15 2.17
Linear (Nominal) 1 3/8 0.91 0.4 1.1 1.6 2.2 2.7 2.9 3.1 3.2 3.2 3.2
Linear (Nominal) 1 1/2 0.94 0.7 1.9 2.9 4 4.8 5.2 5.5 5.6 5.7 5.7
Equal Percentage 2 1/4 0.65 0.1 0.14 0.19 0.23 0.27 0.55 0.82 1.12 1.62 1.72
Equal Percentage 2 7/16 0.60 0.1 0.3 0.5 0.7 1 1.5 2.6 3.8 4.8 5.4
Equal Percentage 2 & 3 * 5/8 0.58 0.3 0.5 0.9 1.1 1.4 2.3 3.9 6.4 8.7 10.8
Equal Percentage 2 & 3 * 7/8 0.66 0.4 0.9 1.57 2.1 3 4.2 6.3 9.6 13 17
Linear (Nominal) 2 & 3 * 1/4 0.55 0.4 1 1.5 2 2.5 2.7 2.8 2.9 2.9 3
Linear (Nominal) 2 & 3 * 3/8 0.77 0.53 1.33 2.06 2.8 3.4 3.6 3.9 4 4 4
Linear (Nominal) 2 & 3 * 1/2 0.78 0.94 2.38 3.67 4.97 5.98 6.48 6.91 7.06 7.13 7.2
Linear (Nominal) 2 & 3 * 3/4 0.80 1.6 4 6.2 8.4 10.1 11 12 12 12 12
Linear (Nominal) 2 & 3 * 1 0.77 2.8 7 11 15 18 19 20 21 21 21
Quick Opening 1 1/8 0.73 0.39 0.40 0.40 0.40 0.40 0.40 0.40 0.40 0.40 0.40
Quick Opening 1 3/16 0.74 0.77 0.90 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92
Quick Opening 1 1/4 0.68 0.88 1.51 1.67 1.71 1.73 1.74 1.74 1.74 1.74 1.74
Quick Opening 1 3/8 0.74 1.02 2.40 3.36 3.64 3.73 3.78 3.82 3.83 3.86 3.86
Quick Opening 1 1/2 0.90 1.09 2.46 4.17 5.03 5.27 5.45 5.60 5.72 5.85 5.93
Quick Opening 1 1 0.65 N/A N/A N/A N/A N/A N/A N/A N/A N/A 9.95
Quick Opening 2 1/4 0.65 1.23 1.82 1.87 1.87 1.87 1.87 1.87 1.87 1.87 1.87
Quick Opening 2 3/8 0.76 1.65 3.41 3.77 3.83 3.84 3.84 3.84 3.84 3.84 3.84
Quick Opening 2 1/2 0.80 2.26 4.35 5.87 6.36 6.51 6.58 6.61 6.63 6.63 6.63
Quick Opening 2 3/4 0.78 2.16 4.61 7.23 9.19 10.2 10.6 10.9 10.9 10.9 10.9
Quick Opening 2 1 0.7 2.54 5.58 9.30 12.3 14.2 15.1 15.5 15.6 15.6 15.8
Quick Opening 2 1 1/2 ** 0.75 N/A N/A N/A N/A N/A N/A N/A N/A N/A 29.8
* 2" body with 2" flanges, and 2" body with 3" flanges
** Soft Seat. Maximum pressure drop for this trim is 300 PSI
High Pressure Cage Guided Balanced Control Valve and Regulator
TypeTrim TypeConnection Size (in.)Trim Size (in.)CfCv at Stem Travel (% Open)
10%20%30%40%50%60%70%80%90%100%
Standard
Equal Percentage2 & 3 *1 1/20.750.61.32.23.458.614212628.6
Equal Percentage2 & 3 *20.762468112033455157
Equal Percentage320.752.94.97.49.51217.428.940.848.152.6
Equal Percentage330.754610131626548397107
Equal Percentage430.75469121625528195115
Equal Percentage440.7591318263664104148197222
Equal Percentage640.7591318263664104148197222
Equal Percentage660.757204578108140222318399431
Equal Percentage860.75476090106119139173243294453
Equal Percentage880.75515564134162330452527571630
Modified EP880.755153235362485584665699745810
Equal Percentage1060.75263746535658104146655655
Equal Percentage1080.75212227103209429596663695884
Modified EP1080.7528724205096326787698148321091
* 2" body with 2" flanges, and 2" body with 3" flanges
Low Pressure Control Valve - Balanced and Non-Balanced
Valve TypeTrim TypeConnection Size (in.)Trim Size (in.)CfCv at Stem Travel (% Open)
10%20%30%40%50%60%70%80%90%100%
Low Pressure Non-Balanced
Equal Percentage11/20.860.50.711.42.12.83.64.35.15.6
Modified EP110.861.11.82.43.44.86.68.510.211.913.2
Equal Percentage21 1/40.841.32.446.710.414.416.919.722.124
Modified EP22 *0.7546.28.612.117.223.530.436.342.547
Modified EP220.754.46.99.513.419.12633.640.24752
Equal Percentage31 5/80.822.94.56.28.812.5172226.330.734
Modified EP330.759.915.621.530.242.958.675.790.4105.7117
Equal Percentage420.804.77.310.114.220.227.535.642.549.755
Modified EP440.7517.827.938.654.277105.2135.9162.2189.8210
Equal Percentage630.8010.2162230.94460.177.792.7108.4120
Modified EP660.7540.663.888.1123.8176240.4310.6370.7433.7480
Low Pressure Balanced
Diaphragm Balanced
Linear (Nominal)21 1/20.79N/AN/AN/AN/AN/AN/AN/AN/AN/A23.3
Linear (Nominal)32 1/4 0.79N/AN/AN/AN/AN/AN/AN/AN/AN/A43.8
Linear (Nominal)430.79N/AN/AN/AN/AN/AN/AN/AN/AN/A70.1
Linear (Nominal)64 7/80.79N/AN/AN/AN/AN/AN/AN/AN/AN/A277
Piston Balanced
Linear (Nominal)21 1/20.79N/AN/AN/AN/AN/AN/AN/AN/AN/A23.3
Linear (Nominal)32 1/40.79N/AN/AN/AN/AN/AN/AN/AN/AN/A43.8
Linear (Nominal)430.79N/AN/AN/AN/AN/AN/AN/AN/AN/A70.1
Piston Balanced Throttling
Linear (Nominal)220.75N/AN/AN/AN/AN/AN/AN/AN/AN/A47
Linear (Nominal)330.75N/AN/AN/AN/AN/AN/AN/AN/AN/A89
Linear (Nominal)440.75N/AN/AN/AN/AN/AN/AN/AN/AN/A160
* 2" body with 2" flanges, and 2" body with 3" flanges
Mechanical Dump Valve
Valve TypeTrim TypeConnection Size (in.)Trim Size (in.)CfCv
Diaphragm Balanced
Linear (Nominal)21 1/20.7923.3
Linear (Nominal)32 1/40.7943.8
Linear (Nominal)430.7970.1
Linear (Nominal)64 7/80.79277
Piston Balanced
Linear (Nominal)21 1/20.7923.3
Linear (Nominal)32 1/40.7943.8
Linear (Nominal)430.7970.1
Piston Balanced Throttling
Linear (Nominal)21 1/20.7522.7
Linear (Nominal)220.7547
Linear (Nominal)330.7589
Treater Valve
Trim TypeConnection Size (in.)Trim Size (in.)CfCv
Linear (Nominal)220.7536.5
Linear (Nominal)330.7593.3
Linear (Nominal)440.75173.5
Linear (Nominal)660.75371.9
Non-Freeze Dump Valve
Trim TypeConnection Size (in.)Trim Size (in.)CfCv at Stem Travel (% Open)
10%20%30%40%50%60%70%80%90%100%
Linear (Nominal)11/40.720.280.721.111.501.801.952.082.132.152.11
Linear (Nominal)13/80.740.41.11.62.22.72.93.13.23.23.96
Linear (Nominal)11/2 0.770.71.92.944.85.25.55.65.76.34
Quick Opening11/40.76N/AN/AN/AN/AN/AN/AN/AN/AN/A1.85
Quick Opening13/80.71N/AN/AN/AN/AN/AN/AN/AN/AN/A4.15
Quick Opening11/20.73N/AN/AN/AN/AN/AN/AN/AN/AN/A5.11
Metering Valve
Trim TypeConnection Size (in.)Trim Size (in.)CfCv at Stem Travel (% Open)
10%20%30%40%50%60%70%80%90%100%
Equal Percentage
11/40.720.280.721.111.501.801.952.082.132.152.11
11/20.780.160.320.470.60.931.742.994.415.656.49
21/40.650.100.140.190.230.270.550.821.121.621.72
27/160.600.10.30.50.711.52.63.84.85.44
25/80.580.30.50.91.11.42.33.96.48.710.76
27/80.660.40.91.572.134.26.39.61317.4
21 1/20.750.61.32.23.458.614212628.60
220.762468112033455157
320.752.94.97.49.51217.428.940.848.152.6
330.754610131626548397107
Three Way Control Valve
Valve TypeTrim TypeConnection Size (in.)Trim Size (in.)CfCv (Thru port)Cv (Lower port)
High PressureN/A113/160.708.313.8
High PressureN/A21 1/20.7027.738.1
Low Pressure Diaphragm BalancedN/A21 1/20.7936.432
Splitter ValveN/A21 1/40.707.510.5
Splitter ValveN/A21 1/20.7027.738.1
Low Pressure Piston BalancedN/A21 1/20.7936.432
Low Pressure Piston BalancedN/A32 3/80.798172

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