Emerson ACE97 Data Sheet
Contents
1. NPS 1 2 DN 15 NPS 1 DN 25 NPS 2 DN 50 0 4 1 20 C 0 2 2 45 4 60 7 5 10 Depad Valve Body NPS 1 DN 25 NPS 2 DN 50 C 20 35 12 70 17 5 3 80 NPS 4 DN 100 C 90 C 150 C 115 C 200 C 140 280 Pad Inlet Connection Select One NPS 1 2 DN 15 Body Size NPT CL150 RF threaded flange and nipple NPS 1 DN 25 Body Size NPT CL 150 RF threaded flange and nipple NPS 2 DN 50 Body Size NPT CL 150 RF threaded flange and nipple Tank Connection Must Match or be Larger than the Largest Pad or Depad Valve Body Size NPS 1 DN 25 CL150 RF NPS 2 DN 50 CL150 RF NPS 3 DN 80 CL150 RF NPS 4 DN 100 CL150 RF Diaphragm Select One Nitrile NBR Ethylenepropylene EPDM EPA Fluorocarbon FKM Note Standard sense line connection is 1 2 NPT Dwyer is a mark owned by Dwyer Instruments Inc Bulletin 74 3 97 Other Elastomers Select One Nitrile NBR Ethylenepropylene EPDM EPA Fluorocarbon FKM Perfluoroelastomer FFKM Control Pressure Ranges Pad Setpoint and Depad Setpoint above Pad Setpoint Select One Pad Setpoint 0 5 to 3 w c 1 to 7 mbar Depad Setpoint 4 to 10 inches w c 10 to 25 mbar Pad Setp2. LOADING PRESSURE EXHAUSTED BACK TO TANK ON OFF DIAGNOSTIC GAUGE CONTROLLED PRESSURE RANGE SPRING SENSING CONNECTION DIAGNOSTIC PORT CLOSED PILOT MAIN VALVE E0004 SPRING INLET PRESSURE ATMOSPHERIC PRESSURE TANK PRESSURE PILOT LOADING PRESSURE E VENT HEADER PRESSURE INERT GAS IN CON PAD VALVE CONNECTION Figure 4 Type ACE97 Pad Off Depad On Table 1 Control Pressure Ranges Bulletin 74 3 97 CONTROLLED PRESSURE RANGES Pad Setpoint Depad Setpoint Above Pad SPRING FREE LENGTH SPRING WIRE DIAMETER Inch w c mbar Inch w c mbar Inch mm Inch mm 0 5 to 3 1to7 4 to 10 10 to 25 3 08 78 2 0 105 2 67 0 5 to7 10 17 4106 10 15 4 00 102 0 092 2 34 to 13 7 32 4 16 10 40 3 73 94 7 0 156 3 96 4 10 10 250 16 to 78 40 to 1940 3 73 94 7 0 156 3 96 4to 10 10 to 250 16 to 78 40 to 1940 2 90 73 7 0 250 6 35 0 5 to 1 4 psig 0 03 to 0 10 bar 0 25 to 1 psig 0 02 to 0 07 bar 223 885 0 250 6 35 1 0 to 2 2 psig 0 07 to 0 15 bar 0 25 to 2 0 psig 0 02 to 0 14 bar 0 313 7 95 1 Two nested springs are used System Sizing where Tank Blanketing systems must be properly sized to have Q Required Depad Flow Rate capacity to supply enough blanketing gas to maintain the setpoint pressure yet large enough to vent excess gas without having tank vapor space pressur
3. Typical accuracy when flowing 5 to 70 of table value is 0 5 inch w c 1 mbar Bulletin 74 3 97 Table 10 NPS 1 DN 25 Depad Valve Capacities of 1 0 Specific Gravity Air DIFFERENTIAL FLOW CAPACITY IN SCFH Nm h OF 1 0 SPECIFIC GRAVITY AIR PRESSURE C 6 C 12 2117 Inch w c mbar SCFH Nm h SCFH Nm h SCFH Nm h SCFH Nm h 2 5 180 4 8 360 9 6 730 19 6 1030 27 6 3 7 220 5 9 440 11 8 890 23 9 1260 33 8 4 10 250 6 7 510 13 7 1030 27 6 1460 39 1 5 12 280 7 5 570 15 3 1150 30 8 1630 43 7 6 15 310 8 3 630 16 9 1260 33 8 1790 48 0 7 17 340 9 1 680 18 2 1360 36 4 1930 51 7 8 20 360 9 6 730 19 0 1460 39 1 2060 55 2 9 22 380 10 2 770 20 6 1540 41 3 2190 58 7 10 25 400 10 7 810 21 7 1630 43 7 2310 61 9 12 30 440 11 8 890 23 9 1780 47 7 2530 67 8 14 35 480 12 9 960 25 7 1930 51 7 2730 73 2 16 40 510 13 7 1030 27 6 2060 55 2 2920 78 3 18 45 540 14 5 1090 29 2 2190 58 7 3100 83 1 20 50 570 15 3 1150 30 8 2300 61 6 3270 87 6 22 55 600 16 1 1210 32 4 2420 64 9 3430 91 9 24 60 630 16 9 1260 33 8 2520 67 5 3580 95 9 26 65 650 17 4 1310 35 1 2630 70 5 3720 99 7 28 70 680 18 2 1360 36 5 2730 73 2 3870 104 30 75 700 18 8 1410 37 8 2820 75 6 4000 107 1 0 psig 69 670 18 0 1350 36 2 2710 72 6 3840 103 1 1 psig 76 710 19 0 1420 38 1 2840 76 1 4030 108 1 2 psig 83 740 19 8 1480 39 7 2970 79 6 4210 113 1 3 psig 90 770 20 6 1540 41 3 3090 82 8 4380 117 1 4 psig 97 800 21 4 1600
4. moves downward pushing the valve plug open and allowing flow through the pad valve to the tank Depad Figure 4 When tank pressure increases above the depad setpoint due to pump in operations or thermal heating the actuator diaphragm moves upward and pushes open the depad pilot This releases depad loading pressure nitrogen or other supply gas When depad pilot loading pressure decreases the depad main valve opens by a spring and allows flow from the tank to the vent or recovery system Diagnostics Tank blanketing valves are often installed in locations that are difficult to access Type ACE97 valves are available with a diagnostics feature that allows analysis of valve operation in the field making maintenance easier and more reliable The diagnostics feature relies uses relationship of pressure in the pilot and main valve chambers to analyze valve performance Bulletin 74 3 97 LOADING PRESSURE EXHAUSTED BACK TO TANK ON OFF DIAGNOSTIC GAUGE DEPAD PILOT ADJUSTABLE DEADBAND CONTROLLED PRESSURE RANGE SPRING REGULATOR ACTUATOR ROLLING DIAPHRAGM CONNECTION DIAGNOSTIC PORT OPEN PILOT E0005 MAIN VALVE SPRING EE INLET PRESSURE ATMOSPHERIC PRESSURE E TANK PRESSURE PILOT LOADING PRESSURE gt 222 VENT HEADER PRESSURE INERT GAS IN PAD VALVE INLET BLEED PRESSURE Figure 3 Type ACE97 Pad On Depad Off TANK CONNECTION
5. or Depad Valve C Vent Gas Specific Gravity Vent Gas Temperature or Depad Setpoint inches w c or mbar Relief Header Pressure at Depad Outlet Flowing Conditions Maximum inches w c or mbar Stored Liquid Flash Point F or or Stored Liquid Boiling Point F or Require at least one for sizing Storage Temperature of Product F or Depad Materials of Construction Compatible with Stored Liquid and Vapors Metals 316 SST or Elastomers Nitrile NBR Fluorocarbon FKM Ethylenepropylene EPDM FDA Perfluoroelastomer FFKM or Other Product to be Blanketed 15 16 Optional Equipment Required Emergency Pressure Vent Setpoint inches w c separate device Connections 17 18 19 Inert Gas Supply NPT Flanged Other specify Tank Connection NPT Flanged Other specify Header Connection Flanged Other specify Notes If the required Pad or Depad valve C value is unknown refer to the Sizing section for more details or contact your local Sales Office If the required Pad or Depad valve C value is known continue with the Ordering worksheet Ordering Guide Pad and Depad Valve Bodies Select One CF8M Stainless steel CF3M Stainless steel Body Size and Coefficient Select One from Each Category Pad Valve Body
6. 42 9 3210 86 0 4550 122 1 5 psig 103 830 22 2 1660 44 5 3320 89 0 4710 126 1 6 psig 110 850 22 8 1710 45 8 3430 91 9 4870 130 1 7 psig 117 880 23 6 1770 47 4 3540 94 9 5020 134 1 8 psig 124 910 24 4 1820 48 8 3640 97 6 5160 138 1 9 psig 131 930 24 9 1870 50 1 3740 100 5300 142 2 0 psig 138 960 25 7 1920 51 5 3840 103 5440 146 2 1 psig 145 980 26 3 1970 52 8 3940 106 5580 149 2 2 psig 152 1000 26 8 2010 53 9 4030 108 5710 153 2 3 psig 159 1030 27 6 2060 55 2 4120 110 5840 156 2 4 psig 165 1050 28 1 2100 56 3 4210 113 5970 160 2 5 psig 172 1070 28 7 2150 57 6 4300 115 6090 163 2 6 psig 179 1090 29 2 2190 58 7 4380 117 6210 166 2 7 psig 186 1110 29 7 2230 59 8 4470 120 6330 170 2 8 psig 193 1130 30 3 2270 60 8 4550 122 6450 173 1 Always use the differential pressure between tank pressure depad setpoint and vent header vapor recovery pressure to calculate flow through the depad valve Bulletin 74 3 97 Table 11 NPS 2 DN 50 Depad Valve Capacities of 1 0 Specific Gravity Air FLOW CAPACITY IN SCFH Nm h OF 1 0 SPECIFIC GRAVITY AIR DIFFERENTIAL PRESSURE C 20 35 70 Inch w c mbar SCFH Nm h SCFH Nm h SCFH Nm h 2 5 1210 32 4 2130 57 1 4260 114 3 7 1490 39 9 2600 69 7 5210 140 4 10 1720 46 1 3010 80 7 6020 161 5 12 1920 51 5 3360 90 0 6730 180 6 15 2100 56 3 3680 98 6 7370 198 17 2270 60 8 3980 107 7970 214 8 20 2430 65 1 4260 114 8520 228 9 22 2580 69 1 4
7. 500 898 42 800 1147 52 100 1396 2 8 psig 193 34 100 914 43 600 1168 53 100 1423 1 Always use the differential pressure between tank pressure depad setpoint and vent header vapor recovery pressure to calculate flow through the depad valve 10 Bulletin 74 3 97 Table 13 NPS 4 DN 100 Depad Valve Capacities of 1 0 Specific Gravity Air FLOW CAPACITY IN SCFH Nm h OF 1 0 SPECIFIC GRAVITY AIR DIFFERENTIAL PRESSURE 150 200 280 Inch w c mbar SCFH SCFH SCFH Nm h 2 5 17 000 456 3 7 20 800 557 4 10 24 100 646 5 12 26 900 721 6 15 29 500 791 7 17 31 800 852 8 20 34 000 911 9 22 36 100 967 10 25 38 100 1021 12 30 41 700 1118 14 35 45 000 1206 16 40 48 100 1289 18 45 51 100 1369 20 50 53 800 1442 22 55 30 200 809 40 300 1080 56 500 1514 24 60 31 600 847 42 100 1128 59 000 1581 26 65 32 900 882 43 800 1174 61 400 1646 28 70 34 100 914 45 500 1219 63 700 1707 30 75 35 300 946 47 100 1262 65 900 1766 1 0 psig 69 33 900 909 45 200 1211 63 300 1696 1 1 psig 76 35 600 954 47 400 1270 66 400 1780 1 2 psig 83 37 200 997 49 600 1329 69 400 1860 1 3 psig 90 38 700 1037 51 600 1383 72 200 1935 1 4 psig 97 40 100 1075 53 500 1434 75 000 2010 1 5 psig 103 41 600 1115 55 400 1485 77 600 2080 1 6 psig 110 42 900 1150 57 200 1533 80 200 2149 1 7 psig 117 44 300 1187 59 000 1581 82 600 2214 1 8 psig 124 45 500 1219 60 700 1627 85 100 2281 1 9 psig 131
8. If it is desired to convert nitrogen flow rates of another gas multiply the flow rate value from the capacity table by the following correction factor in Table 3 Depad Valves In the case of depad valves the tables are based on air 1 0 specific gravity Always use the differential pressure between tank pressure depad setpoint and vent header vapor recovery pressure to calculate flow through the depad valve Bulletin 74 3 97 Table 2 Flow Rate Conversion MULTIPLY MAXIMUM PUMP RATE BY TO OBTAIN U S GPM 8 021 SCFH U S GPH 0 1337 SCFH m hr 1 01 Nm h Barrels hr 5 615 SCFH Barrels day 0 2340 SCFH Table 3 Correction Factors For Converting Nitrogen Flow Rates to Other Gas Flow Rates BLANKET GAS SPECIFIC GRAVITY CORRECTION FACTOR Natural Gas 0 60 1 27 Air 1 00 0 99 Dry CO 1 52 0 80 0 985 Correction Factor SG Table 4 Correction Factors For Converting Air Flow Rates to Other Gas Flow Rates VENT GAS SPECIFIC GRAVITY CORRECTION FACTOR 0 60 1 29 0 80 1 19 1 20 0 91 1 40 0 85 1 60 0 79 1 80 0 75 2 00 0 71 3 00 0 58 1 00 Correction Factor 6 Table 5 Flow Rate Requirements for Liquid Pump In Pump Out 2000 Flashpoint gt 100 F 38 C or Normal Boiling Point gt 300 F 149 C PUMP OUT INBREATHING 5 6 SCFH 0 15 of air per barrel hour of liquid 8 0 SCFH 0 21 Nm h of air
9. Nm h 25 17 550 14 7 30 24 630 16 9 40 2 8 780 20 9 50 3 4 930 24 9 60 4 1 1070 28 7 70 4 8 1230 33 0 80 5 5 1390 37 3 90 6 2 1560 41 8 100 6 9 1720 46 1 120 8 3 8 4 828 1020 273 2040 54 7 140 9 7 9 8 966 1180 31 6 2360 63 2 160 11 0 11 2 1103 1340 35 9 2680 71 8 180 12 4 127 1241 1500 40 2 3000 80 4 200 13 8 14 1 1379 1660 44 5 3330 89 2 Table 8 NPS 1 DN 25 Pad Valve Capacities of 0 97 Specific Gravity Nitrogen CAPACITIES IN SCFH Nm h OF NITROGEN INLET PRESSURE 1 4 7 5 Cy 10 psig bar kg cm kPa SCFH Nm h SCFH Nm h SCFH SCFH Nm h SCFH Nm h 25 1 7 1 76 172 1330 35 6 2670 71 6 5350 143 10 000 268 13 000 348 30 2 1 2 11 207 1510 40 5 3020 80 9 6050 162 11 300 303 15 100 405 40 2 8 2 81 276 1870 50 1 3750 101 7510 201 14 000 375 18 700 501 50 3 4 3 52 345 2280 61 1 4570 122 9140 245 17 100 458 22 800 611 60 4 1 4 22 414 2690 72 1 5380 144 10 700 287 20 100 539 26 900 721 70 4 8 4 92 483 3090 82 8 6180 166 12 300 330 23 200 622 30 000 804 80 5 5 5 62 552 3490 93 5 6990 187 13 900 373 26 200 702 34 900 935 90 6 2 6 33 621 3900 105 7800 209 15 600 418 29 200 783 39 000 1045 100 6 9 7 03 690 4300 115 8600 230 17 200 461 32 200 863 43 000 1152 110 7 6 7 73 759 4700 126 9410 252 18 800 504 35 300 946 47 000 1260 120 8 3 8 44 827 5100 137 10 200 273 20 400 547 38 300 1026 51 000 1367 130 9 0 9 14 897 5510 148 11 000 295 22 000 590 41 300 1107 55 100 1477 140 9 7 9 84 965 5910 158 11 800 316 23 600 632 44 300 1187 59 10
10. Type ACE97 Pad Depad Valve Dimensions continued Table 14 Type ACE97 Pad Depad Valve Dimensions continued DIMENSIONS IN INCH mm FOR NPS 1 2 x 1 x 1 OR 2 DN 15 x 25 x 25 OR 50 BODY WITH OPTIONS A B NPS 1 2 DN 15 NPS 1 2 DN 15 NPS 1 2 NPS 1 2 SUE id ane 2d CL150 RF CL150 RF 1 NPT DN 25 or 50 1 NPT DN 25 or 50 bei Without Filter With Filter CL150 RF CL150 RF 10 4 264 14 2 360 14 356 15 9 404 3 7 193 8 203 6 3 160 10 6 269 DIMENSIONS IN INCH mm FOR NPS 1 2 x 1 x 2 DN 15 x 25 x 50 BODY WITH SINGLE ARRAY MANIFOLD A B NPS 1 2 1 NPS 1 2 or 1 4 2 NPT 1 2 NPT DN 15 or 25 DN 15 or 25 TNT dd ed 2 Without Filter With Filter CL150 RF CL150 RF ei teas d CLAU EE Without Filter With Filter 10 4 264 14 2 1360 14 356 15 9 404 3 7193 8 203 12 6 320 Bulletin 74 3 97 14 Information Required In order to complete the specification worksheet the following information must be provided Operating pressures and temperatures must be within the ranges listed within this bulletin Please specify measurement units Imperial USA or Metric Pad Information 1 2 3 4 5 Maximum Inert Gas Flow SCFH Nm3 hr or Pad Valve Cv Inert Gas or Inert Gas Specific Gravity Supply Pressure Inert Gas Maximum Minimum Operating Temperature F or C Pad Setpoint inches w c or mbar Depad Information Maximum Vent Gas Flow or Nm hr
11. of 1 0 Specific Gravity Air DIFFERENTIAL PRESSURE FLOW CAPACITY IN SCFH Nm h OF 1 0 SPECIFIC GRAVITY AIR 90 C 7115 C 140 Inch w c mbar SCFH Nm h SCFH Nm h SCFH Nm h 2 5 8500 228 3 7 10 400 279 4 10 12 000 322 5 12 13 400 359 6 15 14 700 394 7 17 15 900 426 8 20 17 000 456 9 22 18 000 482 10 25 19 000 509 12 30 20 800 557 14 35 22 500 603 16 40 24 000 643 18 45 25 500 683 20 50 26 900 721 22 55 18 100 485 23 200 622 28 200 756 24 60 18 900 507 24 200 649 29 500 791 26 65 19 700 528 25 200 675 30 700 823 28 70 20 400 547 26 100 699 31 800 852 30 75 21 200 568 27 100 726 32 900 882 1 0 psig 69 20 300 544 26 000 697 31 600 847 1 1 psig 76 21 300 571 27 300 732 33 200 890 1 2 psig 83 22 300 598 28 500 764 34 700 930 1 3 psig 90 23 200 622 29 600 793 36 100 967 1 4 psig 97 24 100 646 30 800 825 37 500 1005 1 5 psig 103 24 900 667 31 800 852 38 800 1040 1 6 psig 110 25 700 689 32 900 882 40 100 1074 1 7 psig 117 26 500 710 33 900 909 41 300 1107 1 8 psig 124 27 300 732 34 900 935 42 500 1139 1 9 psig 131 28 100 753 35 900 962 43 700 1171 2 0 psig 138 28 800 772 36 800 986 44 800 1201 2 1 psig 145 29 500 791 37 700 1010 45 900 1230 2 2 psig 152 30 200 809 38 600 1034 47 000 1260 2 3 psig 159 30 900 828 39 500 1059 48 100 1289 2 4 psig 165 21 600 579 40 300 1080 49 100 1316 2 5 psig 172 32 200 863 41 200 1104 50 100 1343 2 6 psig 179 32 900 882 42 000 1126 51 100 1369 2 7 psig 186 33
12. tanks containing non flammable non volatile products Pad Sizing Quad where Qua Required Pad Flow Rate Q Required Flow Rate for displacement due to pump out pump out See Table 2 depad i Required Flow Rate for displacement due to liquid pump in See Table 2 pump out API 2000 The American Petroleum Institute Standard 2000 API 2000 sizing criteria accounts for liquid pump in and pump out as well as contraction and expansion of tank vapors due to heating and cooling When using API 2000 methods Pad Sizing Qu 5 imp out where Qu Required Pad Flow Rate Required Flow Rate for displacement due to pump out See Table 5 Quas Required Flow Rate due to thermal cooling See Table 6 Depad Sizing x Q where Q Required Depad Flow Rate 7 Required Pump In Rate See Table 5 Required Flow Rate due to thermal expansion See Table 6 Supplemental Venting Depending on the method there can be a significant difference in the calculated required capacity No matter which method is used the tank must be equipped with supplemental venting to protect the tank product and personnel in cases of equipment failure fire exposure or other conditions that could cause the tank pressure or vacuum to exceed operating limits Capacity Information Pad Valves In the case of pad valves the tables are based on 0 97 specific gravity nitrogen
13. 0 1584 150 10 3 10 55 1034 6310 169 12 600 338 25 200 675 47 300 1268 63 100 1691 160 11 0 11 25 1103 6710 180 13 400 359 26 800 718 50 300 1348 67 100 1798 170 11 7 11 95 1172 7120 191 14 200 381 28 400 761 53 400 1431 71 200 1908 180 12 4 12 65 1241 7520 202 15 000 402 30 000 804 56 400 1512 75 200 2015 190 13 1 13 36 1310 7920 212 15 800 423 31 700 850 59 400 1592 79 200 2123 200 13 8 14 06 1379 8320 223 16 600 445 33 300 892 62 400 1672 83 200 2230 Typical accuracy when flowing 5 to 70 of table value is 0 5 inch w c 1 mbar Table 9 52 DN 50 Pad Valve Capacities of 0 97 Specific Gravity Nitrogen CAPACITIES IN SCFH Nm h OF NITROGEN INLET PRESSURE C 20 Cy 45 Cy 60 psig bar kg cm kPa SCFH SCFH Nm h SCFH Nm h 25 1 7 1 76 172 26 700 716 60 200 1613 80 000 2144 30 2 1 2 11 207 30 200 809 68 100 1825 90 800 2433 40 2 8 2 81 276 37 500 1005 84 500 2265 112 700 3020 50 34 3 52 345 45 700 1225 102 800 2755 137 100 3674 60 4 1 4 22 414 53 800 1442 121 000 3243 161 400 4326 70 4 8 4 92 483 61 800 1656 139 200 3731 185 600 4974 80 5 5 5 62 552 69 900 1873 154 400 4138 209 800 5623 90 6 2 6 33 621 78 000 2090 175 500 4703 234 000 6271 100 6 9 7 03 690 86 000 2305 193 600 5188 258 200 6920 125 8 6 8 79 862 102 100 2736 238 900 6403 306 500 8214 150 10 3 10 55 1034 126 300 3385 284 200 7617 378 900 10 155 175 12 1 12 31 1207 142 400 3816 329 400 8828 427 200 11 449 200 13 8 14 06 1379 166 500 4462 347 700 9318 499 600 13 389
14. 00 80 4 5000 134 10 000 420 000 1 590 000 10 000 268 6000 161 10 000 268 15 000 630 000 2 385 000 15 000 402 9000 241 15 000 402 20 000 840 000 3 180 000 20 000 536 12 000 322 20 000 536 25 000 1 050 000 3 975 000 24 000 643 15 000 402 24 000 643 30 000 1 260 000 4 769 000 28 000 750 17 000 456 28 000 750 35 000 1 470 000 5 564 000 31 000 831 19 000 509 31 000 831 40 000 1 680 000 6 359 000 34 000 911 21 000 563 34 000 911 45 000 1 890 000 7 154 000 37 000 992 23 000 616 37 000 992 50 000 2 100 000 7 949 000 40 000 1072 24 000 643 40 000 1072 60 000 2 520 000 9 539 000 44 000 1179 27 000 724 44 000 1179 70 000 2 940 000 11 129 000 48 000 1286 29 000 777 48 000 1286 80 000 3 360 000 12 719 000 52 000 1394 31 000 831 52 000 1394 90 000 3 780 000 14 309 000 56 000 1501 34 000 911 56 000 1501 100 000 4 200 000 15 899 000 60 000 1608 36 000 965 60 000 1608 120 000 5 040 000 19 079 000 68 000 1822 41 000 1099 68 000 1822 140 000 5 880 000 22 258 000 75 000 2010 45 000 1206 75 000 2010 160 000 6 720 000 25 438 000 82 000 2198 50 000 1340 82 000 2198 180 000 7 560 000 28 618 000 90 000 2412 54 000 1447 90 000 2412 Bulletin 74 3 97 Table 7 NPS 1 2 DN 15 Pad Valve Capacities of 0 97 Specific Gravity Nitrogen CAPACITIES IN SCFH Nm h OF NITROGEN INLET PRESSURE 04 psig bar SCFH
15. 46 800 1254 62 400 1672 87 400 2342 2 0 psig 138 48 000 1286 64 000 1715 89 700 2404 2 1 psig 145 49 200 1319 65 600 1758 91 900 2463 2 2 psig 152 50 400 1351 67 200 1801 94 100 2522 2 3 psig 159 51 500 1380 68 700 1841 96 200 2578 2 4 psig 165 52 600 1410 70 200 1881 98 300 2634 2 5 psig 172 53 700 1439 71 700 1922 100 300 2688 2 6 psig 179 54 800 1469 73 100 1959 102 300 2742 2 7 psig 186 55 900 1498 74 500 1997 104 300 2795 2 8 psig 193 56 900 1525 75 900 2034 106 200 2846 1 Always use the differential pressure between tank pressure depad setpoint and vent header vapor recovery pressure to calculate flow through the depad valve 11 Bulletin 74 3 97 18 7 174 1 2 NPT SENSING CONNECTION NPS 1 DN 25 CL150 RF VAPOR d RECOVERY 7N 2 AL 1 a CONNECTION 1 NPT BLANKETING GAS CONNECTION A 4 3 0 76 4 12 5 318 7 22 5 1572 NPS 1x 1 1 2 DN 25 x 25 x 25 OR 50 WITH OPTIONS 24 1 1612 VAPOR RECOVERY CONNECTION 12 3 312 1 BLANKETING GAS CONNECTION gt 1 2 SENSING CONNECTION TANK CONNECTION 6 3 160 gt l 12 5 318 wj 6 0 152 1 2 SENSING CONNECTION 2 5164 1 2 SENS
16. 510 121 9030 242 10 25 2720 72 9 4760 128 9520 255 12 30 2980 79 9 5210 140 10 430 280 14 35 3220 86 3 5630 151 11 270 302 16 40 3440 92 2 6020 161 12 040 323 18 45 3650 97 8 6380 171 12 770 342 20 50 3840 103 6730 180 13 470 361 22 55 4030 108 7060 189 14 120 378 24 60 4210 113 7370 198 14 750 395 26 65 4380 117 7670 206 15 350 411 28 70 4550 122 7960 213 15 930 427 30 75 4710 126 8240 221 16 490 442 1 0 psig 69 4520 121 7920 212 15 800 423 1 1 psig 76 4740 127 8310 223 16 600 445 1 2 psig 83 4960 133 8680 233 17 300 464 1 3 psig 90 5160 138 9030 242 18 000 482 1 4 psig 97 5350 143 9370 251 18 700 501 1 5 psig 103 5540 148 9700 260 19 400 520 1 6 psig 110 5720 153 10 000 268 20 000 536 1 7 psig 117 5900 158 10 300 276 20 600 552 1 8 psig 124 6070 163 10 600 284 21 200 568 1 9 psig 131 6240 167 10 900 292 21 800 584 2 0 psig 138 6400 172 11 200 300 22 400 600 2 1 psig 145 6560 176 11 400 306 22 900 614 2 2 psig 152 6720 180 11 700 314 23 500 630 2 3 psig 159 6870 184 12 000 322 24 000 643 2 4 psig 165 7020 188 12 200 327 24 500 657 2 5 psig 172 7170 192 12 500 335 25 000 670 2 6 psig 179 7310 196 12 700 340 25 500 683 2 7 psig 186 7450 200 13 000 348 26 000 697 2 8 psig 193 7590 203 13 200 354 26 500 710 1 Always use the differential pressure between tank pressure depad setpoint and vent header vapor recovery pressure to calculate flow through the depad valve Bulletin 74 3 97 Table 12 NPS 3 DN 80 Depad Valve Capacities
17. Bulletin 74 3 97 June 2013 Type ACE97 Pad Depad Valve Bubble Tight Shutoff Frictionless Pilot Valve Pilot Controlled Maximum Vapor Space Control Stainless Steel Self Contained Diagnostics Fully Balanced Figure 1 Type ACE97 Pad Depad Valve FISHER EMERSON Process Management D102721X012 Bulletin 74 3 97 Specifications Pad Specifications Pad Body Sizes NPS 1 2 1 and 2 DN 15 25 and 50 Maximum Operating Inlet Pressure 200 psig 13 8 bar Maximum Main Valve Inlet Pressure 200 psig 13 8 bar Control Pressure Ranges See Table 1 Maximum and Minimum Differential Pressures Minimum 25 psig 1 7 bar Maximum 200 psig 13 8 bar Maximum Backpressure 20 psig 1 4 bar Flow Coefficients for Relief Valve Sizing 110 of rated C C 0 2 use C 0 22 C 0 4 use 0 44 1 1 1 2 use 2 2 C 4 use 4 4 7 5 8 25 C 10 C 11 C 20 use 22 C 45 use C 50 C 60 use C 66 Depad Specifications Depad Body Sizes NPS 1 2 3 and 4 DN 25 50 80 and 100 Depad Pressure Ranges See Table 1 Valve Coefficients NPS 1 DN 25 body C 3 C 12 or C 17 NPS 2 DN 50 body C 20 C 35 or C 70 NPS 3 DN 80 body C 6 C 90 C 115 or C 140 NPS 4 DN 100 body C 150 C 200 or C 280 General Type ACE97 Specifica
18. Emerson Process Management Regulator Technologies Inc USA Headquarters McKinney Texas 75069 1872 USA Tel 1 800 558 5853 Outside U S 1 972 548 3574 Asia Pacific Shanghai 201206 China Tel 86 21 2892 9000 Europe Bologna 40013 Italy Tel 39 051 419 0611 Middle East and Africa Dubai United Arab Emirates Tel 971 4811 8100 For further information visit www fisherregulators com Natural Gas Technologies Emerson Process Management Regulator Technologies Inc USA Headquarters McKinney Texas 75069 1872 USA Tel 1 800 558 5853 Outside U S 1 972 548 3574 Asia Pacific Singapore 128461 Singapore Tel 65 6770 8337 Europe Bologna 40013 Italy Tel 39 051 419 0611 Chartres 28008 France Tel 33 2 37 33 47 00 TESCOM Emerson Process Management Tescom Corporation USA Headquarters River Minnesota 55330 2445 USA Tels 1 763 241 3238 1 800 447 1250 Europe Selmsdorf 23923 Germany Tel 49 38823 31 287 Asia Pacific Shanghai 201206 China Tel 86 21 2892 9499 The Emerson logo is a trademark and service mark of Emerson Electric Co All other marks are the property of their prospective owners Fisher is a mark owned by Fisher Controls International LLC a business of Emerson Process Management The contents of this publication are presented for informational purposes only and while every effort has been made to ensure their accuracy they are not to be construed as warranti
19. GPM of liquid 35 1 5 0 94 Nm h of air per m hr of liquid PUMP IN OUTBREATHING 6 barrels hour of SCFH air per barrel hour of liquid 8 6 SCFH 0 23 Nm h of air GPM of liquid 37 7 SCFH 1 01 Nm h of air per m hr of liquid Flashpoint lt 100 F 38 C or Normal Boiling Point lt 300 F 149 C 5 6 SCFH 0 15 Nm h of air per barrel hour of liquid 8 0 5 0 21 Nm h of air per GPM of liquid 35 1 SCFH 0 94 Nm h of air per m hr of liquid 12 0 32 Nm h of air per barrel hour of liquid 17 5 0 46 Nm h of air per GPM of liquid 75 3 SCFH 2 02 Nm h of air per m hr of liquid Table 6 Gas Flow Required for Thermal Cooling Inbreathing or Heating Outbreathing per API 2000 Interpolate for Intermediate Sizes VESSEL CAPACITY AIR FLOW RATE REQUIRED Outbreathing Inbreathing Flashpoint lt 100 F 38 C or Flashpoint gt 100 F 38 C or Barrels Gallons Liters Normal Boiling Point Normal Boiling Point lt 300 F 149 C gt 300 F 149 C SCFH Nm h SCFH Nm h SCFH Nm h 60 2520 9500 60 1 61 40 1 07 60 1 61 100 4200 16 000 100 2 68 60 1 61 100 2 68 500 21 000 79 500 500 13 4 300 8 04 500 13 4 1000 42 000 159 000 1000 26 8 600 16 1 1000 26 8 2000 84 000 318 000 2000 53 6 1200 322 2000 53 6 3000 126 000 477 000 3000 80 4 1800 48 2 3000 80 4 4000 168 000 636 000 4000 107 2400 64 3 4000 107 5000 210 000 795 000 5000 134 30
20. ING CONNECTION 8 1 206 lt 2 5 64 7 2 183 NPS 1 x 3 x 3 OR 4 25 x 80 x 80 OR 100 WITH OPTIONS Figure 5 Type ACE97 Pad Depad Valve Dimensions Table 14 Type ACE97 Pad Depad Valve Dimensions INCHES mm DIMENSIONS IN INCH mm FOR NPS 1 x 1 x 2 DN 25 x 25 x 25 OR 50 BODY WITH OPTIONS A 9 4 239 1 CL150 RF 1 5 292 CL150 RF 6 3 160 CL150 RF 8 8 224 DIMENSIONS IN INCH mm FOR NPS 1 x 3 x 3 OR 4 DN 25 x 80 x 80 OR 100 BODY WITH OPTIONS A B 5 3 4 5 3 4 1 nic 40 3 80 100 4 80 100 CL150 RF CL150 RF 11 5 292 16 9 429 17 2 437 17 4 442 5 3 135 4 9 124 5 8 147 15 6 396 12 Bulletin 74 3 97 125 318 8 1 qB BLANKETING GAS 13 3 337 CONNECTION e RECOVERY CONNECTION Y 4 2 NPT 1 SENSING CONNECTION 73 185 CONNECTION ra A 4 30 76 2 5164 NPS 1 2 x 1 1 2 DN 15 x 25 x 25 OR 50 WITH OPTIONS 13 3 337 BLANKETING GAS NPS 1 OR 2 CONNECTION DN 25 OR 50 CL150 RF VAPOR RECOVERY CONNECTION Y 4 320 76 INCHES mm TANK CONNECTION NPS 1 2 x 1x 2 DN 15 x 25 x 50 WITH SINGLE ARRAY MANIFOLD Figure 5
21. e rise above allowable limits Pad valves must not be so large that they cause overpressure Sizing must also take into account applicable codes and standards as they apply to the installation For proper sizing of the pad and depad valves certain information is required Proper sizing is essential to protect the product the tank the environment and personnel Sizing Information The following list contains all necessary information to properly size a valve once system parameters are determined The customer must provide the following Pump in rate for depad calculation Pump out rate for pad calculation nert blanketing gas specific gravity nert gas supply pressure for pad selection Tank volume for API sizing both pad and depad Stored fluid flash point for API sizing depad Stored fluid boiling point for API sizing depad Vent gas specific gravity SG for API sizing depad Depad setpoint Vent piping backpressure Sizing method Direct Displacement or API 2000 Direct Displacement The direct displacement method should be used with extreme caution The direct displacement method determines the amount of blanketing gas required to replace liquid pumped out of the tank and the amount of gas that must be removed due to liquid pump in Direct displacement does not account for fluctuating temperature or other factors that may affect pressure in the vapor space This method is typically applied to
22. ent the tank from entering a vacuum condition and collapsing upon itself The Type ACE97 valve provides excellent and accurate pressure control of the vapor space in the tank Blanketing pressure is kept to a minimum in order to conserve the use of blanketing gas Pad Tank Blanketing ensures a minimum pressure is maintained in the tank vapor space during normal operation Depad Vapor Recovery limits tank pressure to a maximum value during normal operation Tank and vapor recovery connections are available to meet most customer requirements A Single Array Manifold SAM provides a single tank and sensing connection and is required for tanks having a single nozzle Accessories include gauges purge meters pressure switches and check valves not be exceeded Features and Benefits Pilot Controlled ACE97 valves NPS 1 DN 25 and larger are pilot operated for a higher degree of accuracy and control Fully Balanced A fully balanced valve eliminates setpoint changes caused by variations in inlet pressure Options and Accessories Inlet Pressure Gauge Displays pressure of blanketing gas supply to the blanketing valve Control Pressure Gauge Low pressure gauge measures tank pressure Pressure Switch Allows for the installation of an alarm system to indicate either low or high pressure on the tank Flow Indicator Provides a visual indication of blanketing gas flow Outlet Check Valve Prevents corrosive
23. es or guarantees express or implied regarding the products or services described herein or their use or applicability We reserve the right to modify or improve the designs or specifications of such products at any time without notice Emerson Process Management Regulator Technologies Inc does not assume responsibility for the selection use or maintenance of any product Responsibility for proper selection use and maintenance of any Emerson Process Management Regulator Technologies Inc product remains solely with the purchaser Process Management Regulator Technologies Inc 2002 2013 All Rights Reserved EMERSON
24. gases and vapors from flowing back into the blanketing system Diagnostic Gauge Allows analysis of valve operation in the field simplifying service and reliability Only available on NPS 1 and 2 DN 25 and 50 pad valve ACTUATOR PAD VALVE 1 FILTER Figure 2 Type ACE97 Pad Depad Valve Parts Single Array Manifold SAM Provides sense line connection and main valve connection through a single tank nozzle Purge Meters Prevents corrosive tank vapors from damaging upstream equipment Principle of Operation Pad Figure 3 NPS 1 and 2 DN 25 and 50 Pad Valves Figure 3 When tank pressure decreases below the pad setpoint due to pump out operations or thermal cooling the actuator diaphragm moves downward pushing open the pad pilot This creates flow from the pad loading chamber to downstream When pad loading pressure decreases the force created by inlet pressure on the pad main valve plug overcomes the main spring force and opens the main valve plug allowing flow through the pad valve to the tank Once tank pressure reaches pad setpoint the pad pilot closes pad loading pressure equalizes with inlet pressure and the pad valve closes NPS 1 2 DN 15 Pad Valves Not Shown The 1 2 DN 15 Pad valve has a main valve only When tank pressure decreases below the pad setpoint the actuator diaphragm Bulletin 74 3 97 DEPAD PILOT VALVE DEPAD MAIN VALVE TO AND FROM TANK
25. oint 0 5 to 7 inches w c 1 to 17 mbar Depad Setpoint 4 to 6 inches w c 10 to 15 mbar Pad Setpoint 3 to 13 inches w c 7 to 32 mbar Depad Setpoint 4 to 16 inches w c 10 to 40 mbar Pad Setpoint 4 to 10 inches w c 10 to 25 mbar Depad Setpoint 16 to 78 inches w c 40 to 194 mbar Pad Setpoint 0 5 to 1 4 psig 0 03 to 0 10 bar Depad Setpoint 0 25 to 1 psig 0 02 to 0 07 bar Pad Setpoint 1 to 2 2 psig 0 07 to 0 15 bar Depad Setpoint 0 25 to 2 psig 0 02 to 0 14 bar S A M Single Array Manifold Tank Connection for a Single Nozzle Tank Connection Optional Yes No Options Select as many as Desired Pad inlet pressure gauge stainless steel Dwyer control pressure gauge 15 psig 1 0 bar max 2 Dwyer control pressure gauges to span pad and depad setpoints Control pressure gauge above 4 inch w c 10 mbar range 4 inch 102 mm diameter max pressure limited to 13096 of gauge span with shutoff valve stainless steel 2 control pressure gauges same as above to span pad and depad setpoints Sensing line purge stainless steel Main line purge stainless steel Dwyer XP pressure switch aluminum housing Pad main line check valve for pad valve stainless steel Diagnostic and inlet gauges NPS 1 or 2 DN 25 or 50 pad valve only Bulletin 74 3 97 Industrial Regulators
26. tions Pressure Registration External Temperature Capabilities Nitrile NBR 20 to 180 F 29 to 82 Fluorocarbon 0 to 212 F 18 to 100 C Ethylenepropylene EPDM FDA 20 to 212 F 29 to 100 C Perfluoroelastomer FFKM 20 to 212 F 29 to 100 C Construction Materials Pad Body and Bonnet NPS 1 2 and 1 DN 15 and 25 0 2 and C 0 4 316L Stainless steel NPS 1 and 2 DN 25 and 50 1 to 4 and 5 to 10 316 Stainless steel NPS 2 DN 50 20 to 60 CF3M CF8M Stainless steel Depad Body and Bonnet 316 Stainless steel Cage 316 Stainless steel Actuator 316 Stainless steel Trim stainless steel Elastomers Nitrile NBR Fluorocarbon FKM Perfluoroelastomer FFKM or Ethylenepropylene EPDM FDA Diaphragm Nitrile NBR Fluorocarbon FKM or Ethylenepropylene EPDM FDA Approximate Weights NPS 1 2 x 1x 1 DN 15 x 25 x 25 70 pounds 32 kg NPS 1x 2 x 2 DN 25 x 50 x 50 105 pounds 48 kg NPS 2 x 3 x 3 DN 50 x 80 x 80 175 pounds 79 kg 1 The pressure temperature limits in this Bulletin or any applicable standard limitation should Introduction The Type ACE97 Pad Depad valve is a self contained pilot operated valve that maintains a blanket of inert gas on top of a stored product to protect it from atmospheric contamination It reduces combustibility decreases vaporization controls vapor space pressure during pump in and pump out operations and helps prev
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