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Bray/McCannalok Butterfly Valves Technical Manual - Table of Contents Topic Page(s) Seating & Unseating Torques..........................3 Imperial (Lb-Ins)................................................4-6 Metric (N-m).....................................................7-9 Dynamic Torque.................................................10-13 Maximum Shaft Torques (Lb-Ins) ....................14 Maximum Shaft Torques (N-m) .......................15 Valve Sizing Coefficients...............................
Bray/McCannalok HPBV – Seating & Unseating Torques Seating & Unseating Torques: Valve orientation to the flow of media affects the torque. Torque values are presented in two categories: FLOW FLOW Seat Retainer UPSTREAM Seat Retainer DOWNSTREAM FLOW FLOW Seat Retainer UPSTREAM Torque : 3 Seat Retainer DOWNSTREAM All information herein is proprietary and confidential and may not be copied or reproduced without the expressed written consent of BRAY INTERNATIONAL, Inc.
Bray/McCannalok HPBV – Seating & Unseating Torques ASME 150 - Torques (Lb-Ins) Series 40/41/4A Standard - Valve Differential Pressure (PSIG) Valve Size Inches Less than 150 psig Retainer Upstream 2.
Bray/McCannalok HPBV – Seating & Unseating Torques ASME 300 - Torques (Lb-Ins) Series 42/43/4B Standard - Valve Differential Pressure (PSIG) Valve Size Inches Less than 150 psig Retainer Upstream 2.
Bray/McCannalok HPBV – Seating & Unseating Torques ASME 600 - Torques (Lb-Ins) Series 44/45 Standard - Valve Differential Pressure (PSIG) Valve Size Inches Less than 150 psig Retainer Upstream 3 4 6 8 10 12 14 16 18 20 24 30 400 850 1,450 3,500 7,100 10,100 11,900 14,000 16,200 21,300 33,000 71,000 >150-600 psig Retainer Downstream 480 960 1,700 4,100 8,300 11,800 14,000 16,500 19,000 25,000 39,000 83,000 Retainer Upstream 700 1,280 2,560 5,760 9,600 11,200 19,200 28,400 34,400 45,600 71,000 137,000
Bray/McCannalok HPBV – Seating & Unseating Torques ASME 150 - Torques (N-m) Series 40/41/4A Standard - Valve Differential Pressure (Bar) Valve Size mm Less than 10.3 Bar Retainer Upstream 65 80 100 125 150 200 250 300 350 400 450 500 600 650 700 750 800 850 900 1,000 1,050 1,200 1,350 1,500 19 21 31 62 78 145 271 396 610 870 1,345 1,729 2,785 2,785 3,938 4,514 5,085 5,085 6,102 7,006 8,023 11,074 15,368 >10.
Bray/McCannalok HPBV – Seating & Unseating Torques ASME 300 - Torques (N-m) Series 42/43/4B Standard - Valve Differential Pressure (Bar) Valve Size mm Less than 10.3 Bar Retainer Upstream 65 80 100 125 150 200 250 300 350 400 450 500 600 750 900 1,000 1,200 1,350 19 21 31 62 96 179 316 480 825 1,345 1,729 2,305 3,650 7,684 11,430 13,063 14,408 >10.
Bray/McCannalok HPBV – Seating & Unseating Torques ASME 600 - Torques (N-m) Series 44/45 Standard - Valve Differential Pressure (Bar) Less than 10.3 Bar Valve Size mm Retainer Upstream 80 100 150 200 250 300 350 400 450 500 600 750 45 96 164 396 802 1,141 1,345 1,582 1,831 2,407 3,729 8,023 >10.3-41.
Bray/McCannalok HPBV – Dynamic Torques Dynamic Torques: When a media flows through a butterfly valve, static pressure does not act uniformly on the surfaces of the valve disc. Dynamic torque will cause rotary motion when unchecked by the actuator or manual operator possibly resulting in opening or closing of the valve.
Bray/McCannalok HPBV – Dynamic Torques For: Condition: Use: Pipe and Valve Size Equal • Nominal Valve Size • Valve Pressure Drop • Ct from graphs/tables on pg. 12 W/ Pipe Reducers • Nominal Valve Size • Ct from graphs/tables on pg. 12 • Valve Pressure Drop as if valve were installed in valve-sized pipe with same flow rate Pipe and Valve Size Equal • Nominal Valve Size • Ct from graphs/tables on pg. 12 • Actual Pressure drop through valve.
Bray/McCannalok HPBV – Dynamic Torques Dynamic Torque Coefficient Figure 3. Ct values with the Seat Retainer Down Stream McCannalok Dynamic Torque Coefficient Seat Retainer Downstream 0.55 0.50 0.45 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0 Dynamic Torque Coefficient Angle of Opening Ct Down 0.15 0.10 0.05 0 -0.05 -0.10 -0.15 -0.20 -0.25 -0.30 -0.35 Figure 4. Ct values with the Seat Retainer Up Stream McCannalok Dynamic Torque Coefficient Seat Retainer Upstream ! -0.
Bray/McCannalok HPBV – Dynamic Torques 1. Subchoked Liquid Flow, Line-size Valve. Example Calculations: A 24” class 150 McCannalok is to be installed in a 24” line carrying water. It has been determined that the flow is not choked and the following pressure drops through the valve have been calculated: Data: • • • • • • • • 75 psi with the valve 20 degrees open 70 psi with the valve 30 degrees open 35 psi with the valve 40 degrees open 3.5 psi with the valve 55 degrees open 1.
Bray/McCannalok HPBV – Maximum Allowable Shaft Torques Maximum Allowable Shaft Torques (Lb-Ins)* Standard & Fire Safe Valves ASME 150 Series S40/41/4A ASME 300 Series S42/43/4B 2.
Bray/McCannalok HPBV – Maximum Allowable Shaft Torques Maximum Allowable Shaft Torques (N-m)* Standard & Fire Safe Valves ASME 150 Series S40/41/4A ASME 300 Series S42/43/4B 65 201 201 NA 80 201 201 337 100 201 201 576 125 337 337 150 337 576 1,481 200 576 1,481 2,574 250 1,481 2,574 8,213 300 1,481 2,574 8,213 350 2,574 8,213 16,112 400 8,213 16,112 27,829 450 8,213 16,112 47,813 500 16,112 22,901 70,649 600 22,901 47,813 119,711 650 22,901 Please Con
Bray/McCannalok HPBV – Valve Sizing Coefficients Valve Sizing Coefficients: 1. Valve Sizing Coefficients (Cv). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pages 15-16 1. Cv stands for Valve Sizing Coefficient. 2. Cv varies with the valve size, angle of opening and the manufacturer’s valve style. 3. Cv is defined as the volume of water in USGPM that will flow through a given restriction or valve opening with a pressure drop of one (1) psi at room temperature. 2.
Bray/McCannalok HPBV – Valve Sizing Coefficients ASME 150 Series 40/41/4A - Valve Sizing Coefficient (Cv) Valve Size Inches 2 1/2 3 4 5 6 8 10 12 14 16 18 20 24 26 28 30 32 34 36 40 42 48 54 60 Disc Position (Degrees) 90º 160 185 375 790 1,350 2,800 4,300 6,650 7,650 9,800 10,500 13,500 20,000 20,000 28,000 32,000 34,000 34,000 48,500 62,000 65,000 91,000 125,000 160,000 Coefficients : 17 80º 136 178 365 675 1,070 2,230 3,450 5,330 6,100 7,860 9,100 11,700 17,100 17,100 23,900 27,300 29,100 29,100 41,10
Bray/McCannalok HPBV – Valve Sizing Coefficients ASME 300 Series 42/43/4B - Valve Sizing Coefficient (Cv) Valve Size Inches 2 1/2 3 4 5 6 8 10 12 14 16 18 20 24 30 36 42 48 54 Disc Position (Degrees) 90º 160 185 375 790 1,000 2,000 2,650 4,000 4,100 7,800 9,500 11,000 18,000 29,000 45,000 60,000 83,000 80º 136 178 365 675 875 1,720 2,250 3,400 3,500 6,540 8,000 9,570 15,100 24,400 38,100 54,000 74,000 70º 100 155 315 500 710 1,360 1,740 2,500 2,600 4,550 6,170 7,300 11,400 18,900 29,200 42,000 58,000 6
Bray/McCannalok HPBV – Valve Sizing Coefficients ASME 150 Series 40/41/4A - Valve Sizing Coefficient (Kv) Valve Size mm 65 80 100 125 150 200 250 300 350 400 450 500 600 650 700 750 800 850 900 1,000 1,050 1,200 1,350 1,500 Disc Position (Degrees) 90º 136 158 320 674 1,152 2,388 3,668 5,672 6,525 8,359 8,957 11,516 17,060 17,060 23,884 27,296 29,002 29,002 41,371 52,886 55,445 77,623 106,625 136,480 Coefficients : 19 80º 116 152 311 576 913 1,902 2,943 4,546 5,203 6,705 7,762 9,980 14,586 14,586 20,387
Bray/McCannalok HPBV – Valve Sizing Coefficients ASME 300 Series 42/43/4B - Valve Sizing Coefficient (Kv) Valve Size mm 65 80 100 125 150 200 250 300 350 400 450 500 600 750 900 1,050 1,200 1,350 Disc Position (Degrees) 90º 136 158 320 674 853 1,706 2,260 3,412 3,497 6,653 8,104 9,383 15,354 24,737 38,385 51,180 70,799 80º 116 152 311 576 746 1,467 1,919 2,900 2,986 5,579 6,824 8,163 12,880 20,813 32,499 46,062 63,122 70º 60º 50º 40º 85 132 269 427 606 1,160 1,484 2,133 2,218 3,881 5,263 6,227 9,724
20 40 80 100 Carbon Steel Body 400 RTFE Seats 200 Bray/McCannalok HPBV – Pressure & Temperature 300 100 200 100 ASME 150 ASME 300 ASME 600 0 0 -20 0 200 0 400 20 600 800 1000 Pressure psig 40 Pressure Bar 60 With PTFE Seats: 1200 80 1400 100 300 Temperature ºF 500 Stainless Steel Body 400 PTFE Seats 200 300 100 200 100 ASME 150 0 -20 0 600 ASME 300 200 0 400 20 600 40 ASME 600 800 1000 Pressure psig Pressure Bar 60 1200 80 0 1400 -29 1600 100 300 500 Tempe
Bray/McCannalok HPBV – Pressure & Temperature With RTFE Seats: 20 40 Pressure Bar 60 80 100 Temperature ºF Stainless Steel Body 400 200 300 100 200 100 ASME 150 0 -20 0 600 ASME 300 200 0 400 20 600 40 ASME 600 800 1000 Pressure psig Pressure Bar 60 1200 80 0 1400 -29 1600 100 300 500 Temperature ºF RTFE Seats Temperature ºC 300 500 Carbon Steel Body 400 RTFE Seats 200 300 100 200 100 ASME 150 ASME 300 ASME 600 0 0 -20 0 200 400 600 800 1000 Pressure psig 120
Bray/McCannalok HPBV – Flange to Valve Bolting Guide Examples of Typical Flange to Valve Bolting* ** Lug Style Bolting Seat Retainer Gasket Gasket Raised Face Flange Raised Face Flange Valve Body Washer Washer **Minimum Bolt Engagement Must Be Equal to Diameter of Bolt **Minimum Bolt Engagement Must Be Equal to Diameter of Bolt Flange Width + Including Raise Face If Applicable Necessary Gasket Width + Seat Retainer Width + Minimum Bolt Engagement Equal to Bolt Diameter Bolt = Length + Wa
