品牌: A20B-2901-0660/07A
发货:3天内
A20B-2901-0660/07AA20B-2901-0660/07A
②环形通道节流装置β值的计算 首先需通过流通面积A来计算当量直径dV ，然后再计算β值。流通面积 A=π(D2- DC2) /4 ( 8) 式中DC为内锥的最大横截面直径。当量直径 dV=( D2- DC2)1/2 （9）直径比 βV=dV /D= (D2- DC2) 1/2 /D （10）③环形通道节流装置的类型ⅰ内锥节流装置美国Mccrometer公司推出了内锥式(V-cone)流量计(图3)。这种流量计的节流件是一个悬挂在管道中央的锥形体，它具有以下优点：锥体可改善流场，在前直管段仅5~10D的情况下可具有±0.5~1%的准确度，此外，它的锥体边缘比孔板耐磨，可以测比较脏污的流体；但是在结构上存在的三个缺点：单臂支撑锥体，力学结构不合理；后取压点易于堵塞；压损大，仅次于孔板。在我国21世纪初期，在缺乏充分研究、测试，没有标准、规程的情况下，宣传过热，不分场合到处滥用，造成多起严重事故。一个新传感器的研发、推出，必须在应用过程中，不断完善，切忌急于推广。对其评估也应依据科学试验的数据。为改进内锥节流装置的不足，我国近几年相继推出了槽道、内文丘利、梭式等节流装置。
UT 370a V2 GJR2 212600 R2, GJR2212600R002 UT370a V2 Module ABB
UT 371a V2 GJR2 212700 R2, GJR2212700R0002 UT371a V2 Interrogation Module ABB
UT 372c GKWN000070R1, UT 372c-sR1 UT 372c-sR1 Module ABB
UT 373a GJR2 237300 R1 UT373a Module ABB
UT 374c-E HEIE4221331R1, HEIE4221331R0001 UT374c-E Module ABB
UT 375b-E HEIE 421101 R1, HEIE421101R0001 UT375b-E Module ABB
UT 376a-E GJR2 308200 R1, GJR2308200R0001 UT376a-E Module ABB
UT 377a-E HEIE 421304 R1, HEIE421304R1 UT377a-E Module ABB
UT 378a-E HEIE 420632R1, HEIE420632R0001 UT378a-E Module ABB
UT 378B-E HEIE 420632R1, HEIE420632R0001 UT378B-E Module ABB
UT 4642a EIA 302 398 R121, EIA302398R0121 UT4642a Speed Transducer Module ABB
UT 4810a-E EIA302 391 R121 UT4810a-E Module ABB
UT 5507a HEIA404926R1, HEIA404926R0001 UT5507a Module ABB
UT386B HESG447475R0002 Monitoring module ABB
UT86-2X40C 57287896 Terminal Block ABB
UT86-2XB+B 577701B0 Terminal Block ABB
UV 7379a-E UV 7379a-E Module ABB
UV5627B-E HEIE420007R0001 Vibration Monitor Unit Analyzer ABB
VD 85-MEM Video Memory Circuit Card ABB
VD86 58173975 Video Controller Module ABB
VE 93 0775187D VE 93 Power Module ABB
VMM01 ETSI Vibration Monitoring Module ABB
VT 371b HEIE 310036 R1, HEIE 310036 R1 VT371b Drive Control Unit Module ABB
VT 372b HEIE 310038 R1 VT372b Drive Control Unit ABB
VT 374a-E GJR2240400R1, GJR2240400R0001 Simple Drive Control Unit, 2-Fold ABB
VV 01 0776103D VV 01 Module ABB
VV 03 0776117B VV 03 Module ABB
VV 11 0 479 909 VV 11 (VV11) Module ABB
WE-EN-99-202-A BRCPBA10PS2QT, BRCPBA10PS022T Interface Module Bailey
XB 01 0776040C XB 01 (XB01) Module ABB
XB 370a HEIE 421443 R1, HEIE421443R0001 XB370a Binary Transmitter ABB
XB 371a HEIE 421446 R1 XB371a Module ABB
XB 381a WDIB771217R0001 XB381a Module ABB
XB 8970a HESG 216563 R1, HESG216563R0001 XB8970a Binary Simulation Module ABB
XB 8971b HESG 446097 R1, HESG446097R0001 XB8970a Analog Simulation Module ABB
XI 01 0776034F XI 01 module ABB
XI 91 0775904B XI 91 Module ABB
XK 11 0776203B XK 11 Module ABB
XK 12 0776204A, 66031-2-0010 XK 12 (XK12) Module ABB
XK 15 0776207A, 66037-2-0000 XK 15 Module ABB
XK 16 0776208A, 66038-2-0000 XK 16 Module ABB
XM 01 0776044J H&B XM 01 Contronic Module ABB
XM 02 0776045H XM 02 (XM02) Module ABB
XM 03 0776046G XM 03 (XM03) Module ABB
XM06B5 1SBP260103R1001 XM06B5-H11.0 Extension Module - Analog I/O ABB
XN 01 0776035G XN 01 Module ABB
XN 03 XN 03 (XN03) Module ABB
XN 05 66032-2-0001 XN 05 (XN05) Module ABB
XN 06 0776055D XN 06 Module ABB
XN200764P1 Unitrol XN200764P1 Faceplate Module ABB
XN200765P1 Unitrol XN200765P1 Faceplace Module ABB
XP 01 0776033H XP 01 Module ABB
XP 8984a-V1 HESG332065R2 XP8984a-V1 Potentiometer Module ABB
XP 8984a-V2 HESG332065R2 XP8984a-V2 Potentiometer Module ABB
XP8670A HEIE420696R0001 Compensation Resistor ABB
XR 8981 V3 HEIE431105 P1 XR8981V3 Key Module ABB
XR 8987A HEIE431105P2 XR8987A Switch Selection Module ABB
XS 311a GJR5105300R1 XS311 Insulating Converter Module ABB
XT 038B SE 206139 R1 XT038b Module ABB
XT 375a-E HEIE 420142 R1 XT 375a-E Module ABB
XT 377 e-E HESG 446624R1 XT 377 e-E Module ABB
XT 377D-S GJR2 3205 00 R10, GJR2320500R0010 XT377D Module ABB
XT 378d-E GJR2330300R0010 XT378D-E Module ABB
XT 378E-E HESG446626R0001,HESG446626R1 XT378E-E Module ABB
XT 383a HEIE 421011 R1, HEIE421011R0001 XT383a Module ABB
XT 5522b HEIE421286R1, HEIE421286R0001 XT5522b Module ABB
XT 5532a HEIE 420780 R1, HEIE420780R0001 XT5532a ABB
XT-2190 Maxtor Tape Drive ABB
XT-376a HEIE 420158 R1, HEIE420158R0001 XT 376a Buffer Module ABB
XT-382b GKWE 001450 R9 XT-382b Power Supply Rack ABB
XT8160C-E V1400 HESG332182R1400 Proximity sensor ABB
XT8160C-E V2250 HESG332182R2250 Proximity sensor ABB
XT8160C-E-V0900 HESG332182R0900 Proximity sensor ABB
XU 01 077604 9G XU 01 Module ABB
XU 02 0776050C XU 02 Module ABB
XU 03 0776205A XU 03 Module ABB
XU 04 0776206A XU 04 (XU04) Module ABB
XU 12 66036-2-0102/580/581/590 XU 12 Module ABB
XU 13 66039-2-3331 XU 13 Module ABB
XU 14 XU 14 Module ABB
XV 370a-E GJR2 240900 R1, GJR2 240900 R0001 XV370a-E Power Distribution Module ABB
XV 371a XV371a Signal Distribution Module ABB
XV 77135 HESG 223040 R1 XV 77135 Module ABB
XV 7715b HESG 446108 R1 XV 7715b Module ABB
XV 7717b HESG 446144 R1 XV 7717b Module ABB
XV 7718b HESG 446139 R1 XV 7718b Module ABB
XV 8152a-E HEIE 210183 R1, HEIE210183R0001 XV8152a-E Indicating Module ABB
XV 8972a HEIE 421385 R1, HEIE421385R0001 XV8972a Connector Module ABB
XV5628A HEIA404919R0001 Vibration main unit ABB
XV7713b ProControl Unit ABB
XV7717C HESG447027R0001 Procontol Module ABB
XV7723 HESG447027R0001 Procontol Module ABB
XX 02 07760320 XX 02 Module ABB
YB560103-AP DSQC212 DSQC212 Display Monitor Module ABB
YB560103-BR DSQC232 DSQC-232 Display Module ABB
YM110001-SP PFVI101 PFVI101 Power Supply ABB
YPP 110A PC Drive Digital Processor Module ABB
YPQ-110A 3ASD573001A5 ULMA I/O Module ABB
YTE 102A YT213001-AA/2 YTE102A Servo Power Module ABB
YTE 102B YT213001-BB Servo Power Module ABB
YTEA 250-15 YT212001-AF/2 Servo Power Module ABB
YTEA 250-8 YT212001-AE/1 Servo Power Module ABB
YYE 109A YT212001-AB/4 Power Supply Module ABB
YYT 102C YT212001-AK/5 Servo Control Module ABB
YYT 102M YT212001-AU/1 Servo Control Module ABB
YYT 102N YT212001-AX/2 Servo Control Module ABB
YYT 107A YT212002-AD/4 Rectifier Module ABB
ZPX 103a/1 HE602271-983/4 ZPX103a/1 Protection Relay Module ABB
ZT 370b-E GJR2236600R1 ZT370b-E Module ABB
ZT 372a-E GJR2 237800 R1, GJR2237800R0001 ZT 372a-E Module ABB
ZT 373a-E GJR2240100R1, GJR2240100R0001 ZT373a-E Time Module ABB
ZT 374a-E HEIA 406630 R1, HEIA406630R0001 ZT374a-E One Shot Module ABB
ZT 374b-E HEIE 421189 R1 ZT374b-E One-Shot Module ABB
ZT 5537a HEIE420605R1, HEIE420605R0001 ZT5537a Module ABB
ZT 5538a HEIE 420607 R1, HEIE420607R0001 ZT5538a Module ABB
ZT 5539A 2/Y1 HEIE 420789 R1, HEIE420789R0001 ZT5539A 2/Y1 Module ABB
