Knowledge (XXG)

High efficiency glandless circulating pump

Source πŸ“

46:. The ECM is a motor that converts a direct current (DC) from an electrical source into an alternating current (AC) which is sent to the motor itself, allowing for increased efficiency over standard AC motors. The permanent magnet rotor consists of an iron core, surrounded by multiple magnetic rare earth metals, and finally a metal sleeve that evenly spaces the magnets around the core, which helps to drive the motor. By utilizing multiple small improvements in pump-design technology such as a double pump in parallel system and variable controls, these pumps are able to run at about a 50% to 70% increased efficiency with up to an 80% decrease in electricity consumption over the previous standard design. This pump has recently become the new standard in both commercial and residential buildings across the 90:
increasing efficiency and reliability. Using the pump's variable controls allows the pump to base its amount of energy consumption on how much it is actually performing, cutting down on usage during non-peak hours and extending the pump's life span. The automatic controls allow the pump to follow a set schedule of how much energy to consume during specific hours, which allows building owners to cut down even further on electricity costs. By dividing the output into a double pump in parallel design, the system is able to greatly adapt to partial load conditions. This accounts for a significant increase in reliability and the 50% to 70% efficiency increase that these high efficiency pumps achieve.
81:
unique design. Whereas standard pumps with shaft seals have multiple chambers with different rotating parts in each, canned rotor technology allows all of the rotating parts within the pump to exist in a single chamber. This increases the overall efficiency since the liquid used to lubricate the shaft bearings is also used to cool the motor. The electronic components of the motor are attached outside this system by means of an encapsulated motor cartridge, which is an independent metal compartment used solely for housing the electronic components.
99:
design key to an increase in efficiency and decrease in energy consumption. Although the pump can be installed both inside and outside of buildings, many precautions must be taken in order to protect the pump from unfavorable weather conditions. These pumps are fairly simple to integrate into systems that follow the old standard since each pump is able to increase its efficiency by changing its design internally, meaning it will still fit into older systems without any problems requiring special adapters.
19: 89:
Many minor factors of the pump's design including its double pump system and control options give it additional efficiency without sacrificing any of its performance. By using a double pump system together with variable and automatic control, the pump is able to decrease its energy consumption while
75:
The primary design factors of a high efficiency glandless circulating pump include an electronically commutated synchronous motor, a permanent magnet rotor, and canned rotor technology. An electronically commutated synchronous motor is used to convert the energy current from a DC energy source into
80:
which is generated by surface currents placed on the surfaces of the stator and rotor and the permanent magnets to generate the electric current which is in output to the drive motor. The canned rotor technology eliminates the need for a shaft seal that many conventional pumps must use through its
98:
These types of pumps are used primarily in heating and air conditioning systems within both residential and commercial buildings such as offices and apartment complexes. The pump is the central component of these systems and accounts for most of the electricity usage within the system, making its
120:
have successfully developed pumps that have been projected to save up to 80% in electricity usage, meeting both of the new grading scale minimums set this year and in 2015. Pump designs are still being revised to continually try to achieve higher efficiency standards and lower the impact on the
116:, will set the bare minimum efficiency level at 0.27, and set the efficiency grading scale from this base value. The EU has also scheduled the efficiency scale to be revised again by 1 August 2015 to set the minimum efficiency to 0.23. Various companies such as 54:. The ErP directive began enforcing this new standard of regulation of these pumps 1 January 2013 and will become even stricter on efficiency standards on 1 August 2015 in order to meet the EU's goal of a 50% total reduction in the pump's energy usage by 2020. 151: 68: 140:(Rubik M., et al.(2005). Instalacje, gazowe, ogrzewcze, wentylacyjne i wodno-kanalizacyjne w budownictwie. Wydawnictwo Forum Sp. z o.o., PoznaΕ„; Chapter 5.14 Rubik M.: Pompy obiegowe w instalacjach c.o. i c.w.u.)(Polish language). 310: 111:
goals. Commercial and residential buildings now have to be outfitted with these pumps in order to decrease electricity usage and, in the long run, decrease the amount of pollutants produced. This new standard, referred to as the
1617: 314: 1567: 30:
is a component of a heating and air conditioning system that allows the system to perform with increased efficiency while significantly reducing the system's electrical usage.
1597: 107:
High efficiency glandless circulating pumps have become the industry standard when developing and maintaining buildings within the European Union due to recent changes to the
252: 271: 1612: 354: 1607: 1539: 1728: 195: 43: 1412: 236: 1572: 1534: 1395: 1437: 1150: 686: 415: 506: 1587: 1401: 781: 345: 280: 1549: 1493: 1488: 1065: 593: 1110: 661: 582: 541: 51: 1453: 1255: 766: 701: 619: 531: 395: 113: 39: 1602: 1483: 1190: 955: 799: 1655: 1514: 1478: 1280: 910: 865: 793: 645: 588: 1702: 1524: 1220: 820: 599: 490: 475: 108: 1697: 1622: 1544: 1473: 1417: 1349: 1245: 1160: 1070: 1035: 511: 176: 1687: 1649: 1529: 1240: 671: 228:
Analytical Calculation Model of an Electronically Commutated Synchronous Motor Including Parasitic Effects
1707: 1385: 1344: 1060: 731: 551: 203: 71:
Diagram of the different components that make up a standard high efficiency glandless circulating pump.
22:
Three different high efficiency glandless circulating pumps designed and developed by the company Wilo.
1509: 1499: 1443: 1380: 1275: 855: 804: 370: 1375: 1365: 1339: 1125: 787: 696: 666: 566: 536: 430: 390: 77: 1638: 1582: 1519: 1296: 1175: 1170: 960: 771: 756: 338: 246: 1210: 1165: 920: 915: 845: 741: 577: 380: 232: 323: 1677: 1432: 1427: 1010: 716: 614: 609: 604: 521: 1672: 1644: 1286: 1200: 1195: 1140: 1130: 1120: 1050: 990: 905: 890: 711: 706: 681: 676: 546: 470: 1733: 1422: 1319: 1095: 1075: 1040: 975: 895: 736: 726: 635: 485: 455: 410: 405: 47: 1722: 1504: 1355: 1250: 1215: 985: 980: 935: 930: 776: 751: 746: 721: 691: 561: 460: 440: 420: 331: 1682: 1360: 1260: 1235: 1230: 1225: 1155: 1090: 970: 940: 880: 875: 850: 761: 640: 556: 480: 465: 450: 1692: 1334: 1291: 1265: 1205: 1185: 1180: 1055: 1015: 1000: 945: 870: 840: 835: 651: 516: 435: 226: 18: 1448: 1370: 1301: 1270: 1145: 1115: 1045: 995: 965: 950: 925: 830: 630: 526: 445: 385: 1407: 1085: 1080: 1030: 1005: 860: 656: 67: 1390: 1324: 825: 625: 425: 400: 375: 121:
environment in order to meet the goal of up to a 50% reduction in both CO
900: 572: 117: 1577: 1329: 1135: 885: 76:
an AC current which is supplied to the drive motor. It utilizes the
1592: 1025: 66: 17: 1100: 1020: 327: 225:
Gottkehaskamp, Hartmann, Raimund, Alexander (September 2013).
125:
emissions and electricity usage across the EU by 2020.
1665: 1631: 1558: 1462: 1310: 813: 499: 361: 311:"Wilo high-efficiency glandless circulating pumps" 196:"HIGH EFFICIENCY PUMPS A MUST FROM JANUARY 2013" 339: 8: 251:: CS1 maint: multiple names: authors list ( 279:. Wilo. 2013. pp. 8–10. Archived from 40:electronically commutated synchronous motor 1106:High efficiency glandless circulating pump 355:Heating, ventilation, and air conditioning 346: 332: 324: 28:high efficiency glandless circulating pump 1540:Mold growth, assessment, and remediation 133: 244: 1413:Programmable communicating thermostat 273:OEM High Efficiency Circulation Pumps 7: 1535:Mechanical, electrical, and plumbing 305: 303: 301: 266: 264: 262: 171: 169: 167: 165: 52:European ErP (Eco-Design) Directive 1396:Minimum efficiency reporting value 14: 1438:Standard temperature and pressure 1151:Packaged terminal air conditioner 687:Passive daytime radiative cooling 416:Heat pump and refrigeration cycle 50:due to a recent ordinance by the 507:Absorption-compression heat pump 1402:Normal temperature and pressure 782:Vapor-compression refrigeration 313:. Building Talk. Archived from 38:It is primarily composed of an 1729:Residential heating appliances 202:. January 2013. Archived from 1: 1550:Testing, adjusting, balancing 1494:Building information modeling 1489:Building services engineering 1066:Ground-coupled heat exchanger 594:Demand controlled ventilation 542:Building insulation materials 184:. Wilo. 2013. pp. 10–14. 114:energy efficiency index (EEI) 1111:High-pressure cut-off switch 662:Ice storage air conditioning 583:Dedicated outdoor air system 1454:Thermostatic radiator valve 1256:Thermostatic radiator valve 767:Underfloor air distribution 702:Radiant heating and cooling 620:Energy recovery ventilation 532:Automobile air conditioning 396:Domestic energy consumption 1750: 1603:Institute of Refrigeration 1484:Architectural technologist 956:Electrostatic precipitator 200:Builders Merchants Journal 1656:Volatile organic compound 1515:Environmental engineering 1479:Architectural engineering 1281:Ultra-low particulate air 866:Automatic balancing valve 794:Variable refrigerant flow 646:Heat recovery ventilation 589:Deep water source cooling 1703:Template:Home automation 1525:Kitchen exhaust cleaning 1221:Solar-assisted heat pump 821:Air conditioner inverter 600:Displacement ventilation 491:Vapour pressure of water 476:Thermal destratification 152:"Permanent Magnet Rotor" 1698:World Refrigeration Day 1545:Refrigerant reclamation 1474:Architectural acoustics 1418:Programmable thermostat 1350:Clean air delivery rate 1246:Thermal expansion valve 1161:Pressurisation ductwork 1071:Ground source heat pump 512:Absorption refrigerator 1688:Glossary of HVAC terms 1650:Sick building syndrome 1530:Mechanical engineering 1241:Smoke exhaust ductwork 672:Mixed-mode ventilation 231:. IEEE. pp. 1–6. 72: 44:permanent magnet rotor 23: 1708:Template:Solar energy 1386:Intelligent buildings 1345:Carbon dioxide sensor 732:Room air distribution 552:Central solar heating 70: 21: 1510:Duct leakage testing 1500:Deep energy retrofit 1444:Thermographic camera 1381:Infrared thermometer 856:Air source heat pump 805:Water heat recycling 371:Air changes per hour 317:on 13 November 2013. 156:United States Patent 1376:HVAC control system 1366:Home energy monitor 1340:Building automation 1126:Inverter compressor 788:Variable air volume 697:Passive ventilation 667:Kitchen ventilation 567:Constant air volume 537:Autonomous building 286:on 13 November 2013 206:on 13 November 2013 78:magnetomotive force 1639:Indoor air quality 1583:ASTM International 1520:Hydronic balancing 1297:Wood-burning stove 1176:Radiator reflector 961:Evaporative cooler 772:Underfloor heating 757:Thermal insulation 73: 24: 1716: 1715: 1632:Health and safety 1211:Scroll compressor 1166:Process duct work 921:Convection heater 916:Condensing boiler 846:Air-mixing plenum 742:Solar combisystem 578:Cross ventilation 381:Building envelope 238:978-3-8007-3537-2 178:Circulating Pumps 85:Secondary factors 1741: 1678:Building science 1433:Smart thermostat 1428:Room temperature 1011:Fireplace insert 717:Radon mitigation 615:Electric heating 610:District heating 605:District cooling 522:Air conditioning 348: 341: 334: 325: 319: 318: 307: 296: 295: 293: 291: 285: 278: 268: 257: 256: 250: 242: 222: 216: 215: 213: 211: 192: 186: 185: 183: 173: 160: 159: 150:Stark, William. 147: 141: 138: 109:carbon emissions 1749: 1748: 1744: 1743: 1742: 1740: 1739: 1738: 1719: 1718: 1717: 1712: 1673:ASHRAE Handbook 1661: 1645:Passive smoking 1627: 1560: 1554: 1466: 1464: 1458: 1312: 1306: 1287:Whole-house fan 1201:Run-around coil 1196:Reversing valve 1141:Mechanical room 1131:Kerosene heater 1121:Infrared heater 1051:Gasoline heater 991:Fan filter unit 906:Condensate pump 891:Centrifugal fan 809: 712:Radiant heating 707:Radiant cooling 682:Passive cooling 677:Microgeneration 547:Central heating 495: 471:Thermal comfort 363: 357: 352: 322: 309: 308: 299: 289: 287: 283: 276: 270: 269: 260: 243: 239: 224: 223: 219: 209: 207: 194: 193: 189: 181: 175: 174: 163: 149: 148: 144: 139: 135: 131: 124: 105: 96: 87: 65: 63:Primary factors 60: 36: 12: 11: 5: 1747: 1745: 1737: 1736: 1731: 1721: 1720: 1714: 1713: 1711: 1710: 1705: 1700: 1695: 1690: 1685: 1680: 1675: 1669: 1667: 1663: 1662: 1660: 1659: 1653: 1647: 1642: 1635: 1633: 1629: 1628: 1626: 1625: 1620: 1615: 1610: 1605: 1600: 1595: 1590: 1585: 1580: 1575: 1570: 1564: 1562: 1556: 1555: 1553: 1552: 1547: 1542: 1537: 1532: 1527: 1522: 1517: 1512: 1507: 1502: 1497: 1491: 1486: 1481: 1476: 1470: 1468: 1460: 1459: 1457: 1456: 1451: 1446: 1441: 1435: 1430: 1425: 1423:Psychrometrics 1420: 1415: 1410: 1405: 1399: 1393: 1388: 1383: 1378: 1373: 1368: 1363: 1358: 1353: 1347: 1342: 1337: 1332: 1327: 1322: 1320:Air flow meter 1316: 1314: 1308: 1307: 1305: 1304: 1299: 1294: 1289: 1284: 1278: 1273: 1268: 1263: 1258: 1253: 1248: 1243: 1238: 1233: 1228: 1223: 1218: 1213: 1208: 1203: 1198: 1193: 1188: 1183: 1178: 1173: 1168: 1163: 1158: 1153: 1148: 1143: 1138: 1133: 1128: 1123: 1118: 1113: 1108: 1103: 1098: 1096:Heating system 1093: 1088: 1083: 1078: 1076:Heat exchanger 1073: 1068: 1063: 1058: 1053: 1048: 1043: 1041:Gas compressor 1038: 1033: 1028: 1023: 1018: 1013: 1008: 1003: 998: 993: 988: 983: 978: 976:Expansion tank 973: 968: 963: 958: 953: 948: 943: 938: 933: 928: 923: 918: 913: 908: 903: 898: 896:Ceramic heater 893: 888: 883: 878: 873: 868: 863: 858: 853: 848: 843: 838: 833: 828: 823: 817: 815: 811: 810: 808: 807: 802: 797: 791: 785: 779: 774: 769: 764: 759: 754: 749: 744: 739: 737:Solar air heat 734: 729: 727:Renewable heat 724: 719: 714: 709: 704: 699: 694: 689: 684: 679: 674: 669: 664: 659: 654: 649: 643: 638: 636:Forced-air gas 633: 628: 623: 617: 612: 607: 602: 597: 591: 586: 580: 575: 570: 564: 559: 554: 549: 544: 539: 534: 529: 524: 519: 514: 509: 503: 501: 497: 496: 494: 493: 488: 486:Thermodynamics 483: 478: 473: 468: 463: 458: 456:Psychrometrics 453: 448: 443: 438: 433: 428: 423: 418: 413: 411:Gas compressor 408: 406:Fluid dynamics 403: 398: 393: 388: 383: 378: 373: 367: 365: 359: 358: 353: 351: 350: 343: 336: 328: 321: 320: 297: 258: 237: 217: 187: 161: 142: 132: 130: 127: 122: 104: 101: 95: 94:Implementation 92: 86: 83: 64: 61: 59: 56: 48:European Union 35: 32: 13: 10: 9: 6: 4: 3: 2: 1746: 1735: 1732: 1730: 1727: 1726: 1724: 1709: 1706: 1704: 1701: 1699: 1696: 1694: 1691: 1689: 1686: 1684: 1681: 1679: 1676: 1674: 1671: 1670: 1668: 1664: 1657: 1654: 1651: 1648: 1646: 1643: 1640: 1637: 1636: 1634: 1630: 1624: 1621: 1619: 1616: 1614: 1611: 1609: 1606: 1604: 1601: 1599: 1596: 1594: 1591: 1589: 1586: 1584: 1581: 1579: 1576: 1574: 1571: 1569: 1566: 1565: 1563: 1561:organizations 1557: 1551: 1548: 1546: 1543: 1541: 1538: 1536: 1533: 1531: 1528: 1526: 1523: 1521: 1518: 1516: 1513: 1511: 1508: 1506: 1505:Duct cleaning 1503: 1501: 1498: 1495: 1492: 1490: 1487: 1485: 1482: 1480: 1477: 1475: 1472: 1471: 1469: 1461: 1455: 1452: 1450: 1447: 1445: 1442: 1439: 1436: 1434: 1431: 1429: 1426: 1424: 1421: 1419: 1416: 1414: 1411: 1409: 1406: 1403: 1400: 1397: 1394: 1392: 1389: 1387: 1384: 1382: 1379: 1377: 1374: 1372: 1369: 1367: 1364: 1362: 1359: 1357: 1356:Control valve 1354: 1351: 1348: 1346: 1343: 1341: 1338: 1336: 1333: 1331: 1328: 1326: 1323: 1321: 1318: 1317: 1315: 1309: 1303: 1300: 1298: 1295: 1293: 1290: 1288: 1285: 1282: 1279: 1277: 1276:Turning vanes 1274: 1272: 1269: 1267: 1264: 1262: 1259: 1257: 1254: 1252: 1251:Thermal wheel 1249: 1247: 1244: 1242: 1239: 1237: 1234: 1232: 1229: 1227: 1224: 1222: 1219: 1217: 1216:Solar chimney 1214: 1212: 1209: 1207: 1204: 1202: 1199: 1197: 1194: 1192: 1189: 1187: 1184: 1182: 1179: 1177: 1174: 1172: 1169: 1167: 1164: 1162: 1159: 1157: 1154: 1152: 1149: 1147: 1144: 1142: 1139: 1137: 1134: 1132: 1129: 1127: 1124: 1122: 1119: 1117: 1114: 1112: 1109: 1107: 1104: 1102: 1099: 1097: 1094: 1092: 1089: 1087: 1084: 1082: 1079: 1077: 1074: 1072: 1069: 1067: 1064: 1062: 1059: 1057: 1054: 1052: 1049: 1047: 1044: 1042: 1039: 1037: 1034: 1032: 1029: 1027: 1024: 1022: 1019: 1017: 1014: 1012: 1009: 1007: 1004: 1002: 999: 997: 994: 992: 989: 987: 986:Fan coil unit 984: 982: 979: 977: 974: 972: 969: 967: 964: 962: 959: 957: 954: 952: 949: 947: 944: 942: 939: 937: 934: 932: 931:Cooling tower 929: 927: 924: 922: 919: 917: 914: 912: 909: 907: 904: 902: 899: 897: 894: 892: 889: 887: 884: 882: 879: 877: 874: 872: 869: 867: 864: 862: 859: 857: 854: 852: 849: 847: 844: 842: 839: 837: 834: 832: 829: 827: 824: 822: 819: 818: 816: 812: 806: 803: 801: 798: 795: 792: 789: 786: 783: 780: 778: 777:Vapor barrier 775: 773: 770: 768: 765: 763: 760: 758: 755: 753: 752:Solar heating 750: 748: 747:Solar cooling 745: 743: 740: 738: 735: 733: 730: 728: 725: 723: 722:Refrigeration 720: 718: 715: 713: 710: 708: 705: 703: 700: 698: 695: 693: 692:Passive house 690: 688: 685: 683: 680: 678: 675: 673: 670: 668: 665: 663: 660: 658: 655: 653: 650: 647: 644: 642: 639: 637: 634: 632: 629: 627: 624: 621: 618: 616: 613: 611: 608: 606: 603: 601: 598: 595: 592: 590: 587: 584: 581: 579: 576: 574: 571: 568: 565: 563: 562:Chilled water 560: 558: 555: 553: 550: 548: 545: 543: 540: 538: 535: 533: 530: 528: 525: 523: 520: 518: 515: 513: 510: 508: 505: 504: 502: 498: 492: 489: 487: 484: 482: 479: 477: 474: 472: 469: 467: 464: 462: 461:Sensible heat 459: 457: 454: 452: 449: 447: 444: 442: 441:Noise control 439: 437: 434: 432: 429: 427: 424: 422: 421:Heat transfer 419: 417: 414: 412: 409: 407: 404: 402: 399: 397: 394: 392: 389: 387: 384: 382: 379: 377: 374: 372: 369: 368: 366: 360: 356: 349: 344: 342: 337: 335: 330: 329: 326: 316: 312: 306: 304: 302: 298: 282: 275: 274: 267: 265: 263: 259: 254: 248: 240: 234: 230: 229: 221: 218: 205: 201: 197: 191: 188: 180: 179: 172: 170: 168: 166: 162: 157: 153: 146: 143: 137: 134: 128: 126: 119: 115: 110: 102: 100: 93: 91: 84: 82: 79: 69: 62: 57: 55: 53: 49: 45: 42:(ECM) with a 41: 33: 31: 29: 20: 16: 1683:Fireproofing 1467:and services 1463:Professions, 1361:Gas detector 1261:Trickle vent 1236:Smoke damper 1231:Smoke canopy 1226:Space heater 1156:Plenum space 1105: 1091:Heating film 971:Exhaust hood 941:Dehumidifier 881:Blast damper 876:Barrier pipe 851:Air purifier 762:Thermosiphon 641:Free cooling 557:Chilled beam 481:Thermal mass 466:Stack effect 451:Particulates 431:Infiltration 362:Fundamental 315:the original 288:. Retrieved 281:the original 272: 227: 220: 208:. Retrieved 204:the original 199: 190: 177: 155: 145: 136: 106: 97: 88: 74: 37: 27: 25: 15: 1693:Warm Spaces 1335:Blower door 1313:and control 1311:Measurement 1292:Windcatcher 1266:Trombe wall 1206:Sail switch 1186:Refrigerant 1181:Recuperator 1056:Grease duct 1016:Freeze stat 1001:Fire damper 871:Back boiler 841:Air ionizer 836:Air handler 800:Ventilation 652:Hybrid heat 517:Air barrier 436:Latent heat 290:13 November 210:13 November 58:Pump design 34:Description 1723:Categories 1449:Thermostat 1371:Humidistat 1302:Zone valve 1271:TurboSwing 1146:Oil heater 1116:Humidifier 1046:Gas heater 996:Fan heater 966:Evaporator 951:Economizer 926:Compressor 831:Air filter 814:Components 631:Forced-air 527:Antifreeze 500:Technology 446:Outgassing 386:Convection 129:References 1559:Industry 1408:OpenTherm 1086:Heat pump 1081:Heat pipe 1031:Fume hood 1006:Fireplace 911:Condenser 861:Attic fan 657:Hydronics 247:cite book 103:Necessity 1666:See also 1391:LonWorks 1325:Aquastat 1191:Register 1171:Radiator 826:Air door 626:Firestop 426:Humidity 401:Enthalpy 391:Dilution 376:Bake-out 364:concepts 1465:trades, 1036:Furnace 901:Chiller 573:Coolant 1618:SMACNA 1578:ASHRAE 1398:(MERV) 1352:(CADR) 1330:BACnet 1283:(ULPA) 1136:Louver 1061:Grille 936:Damper 886:Boiler 784:(VCRS) 585:(DOAS) 235:  1734:Pumps 1658:(VOC) 1652:(SBS) 1641:(IAQ) 1598:CIBSE 1593:BSRIA 1496:(BIM) 1440:(STP) 1404:(NTP) 1026:Freon 796:(VRF) 790:(VAV) 648:(HRV) 622:(ERV) 596:(DCV) 569:(CAV) 284:(PDF) 277:(PDF) 182:(PDF) 1613:LEED 1573:AMCA 1568:AHRI 1101:HEPA 1021:Flue 946:Duct 292:2013 253:link 233:ISBN 212:2013 118:Wilo 1623:UMC 1608:IIR 1588:BRE 981:Fan 1725:: 300:^ 261:^ 249:}} 245:{{ 198:. 164:^ 154:. 26:A 347:e 340:t 333:v 294:. 255:) 241:. 214:. 158:. 123:2

Index


electronically commutated synchronous motor
permanent magnet rotor
European Union
European ErP (Eco-Design) Directive

magnetomotive force
carbon emissions
energy efficiency index (EEI)
Wilo
"Permanent Magnet Rotor"




Circulating Pumps
"HIGH EFFICIENCY PUMPS A MUST FROM JANUARY 2013"
the original
Analytical Calculation Model of an Electronically Commutated Synchronous Motor Including Parasitic Effects
ISBN
978-3-8007-3537-2
cite book
link



OEM High Efficiency Circulation Pumps
the original

Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.

↑