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VM1110T
新型流量节流装置的原理 虽然差压节流装置可达几十种，但万变不离其宗，其原理都基于能量守恒(公式1)与质量守恒（公式2）这两个物理公式，即由于流体流通的横截面积和/或流动通道的变化所引发的差压是流体流速、流体通道和流体特性的函数。 u1A1=u2A2= qm(t) 上式中，p：流体压力； ：流体流速 ρ：流体密度；A：流通截面面积。如果流速不高，密度ρ可视为常数；公式将变得十分简单，运用上式，通过节流增加流速，降低压力（位能）；管道中的流体因节流流通面积减小而加速，因能量守恒促使压力降低，通过测差压可知流速来推算流量大小。任何节流件都会造成压力损失，压力不可能恢复到节流前的数值，这个差值即永久压损。当然，不同结构的节流器件所引起的压力损失是不相同的。这类节流装置可分为以下三大类：(1) 孔板（同心单孔，偏心、圆缺、多孔等）；（2） 环形通道（V锥、环形孔板、槽道、内文丘利、梭式等）；(3) 文丘里（文丘里管、道尔管、罗洛斯管、环楔等）。 NINT-66C 58976482 5761978E Main Circuit Interface Kit ABBNINT-70C Interface Module ABB
NIOC-01 BSE00575R1 Control Board ABB
NIOP02 Network 90 I/O Power Panel ABB
NIOX01 I/O Expander Module ABB
NIPL01 Plant Loop Termination Module ABB
NIRL01 Remote Link Termination Module ABB
NIRL0 Remote Link Termination Module ABB
NKAS01-10 Analog Module Termination Cable ABB
NKAS01-8 Analog Module Termination Cable ABB
NKAS01-9 Analog Module Termination Cable ABB
NKAS11-12 Analog Slave Termination Unit Cable - 12 foot ABB
NKAS11-15 Analog Slave Termination Unit Cable - 15 foot ABB
NKDO01-2 Digital Output Cable ABB
NKDO01-5 Digital Output Cable ABB
NKEB01 Expander Bus Cable Bailey
NKLM01-4 Loop Interface Cable ABB
NKLM01-5 Loop Interface Cable ABB
NKLS01-10 Communications Cable ABB
NKLS01-5 Loop Interface Cable ABB
NKLS01-6 Loop Interface Cable ABB
NKLS02-10 Infi-Net Interface Cable - 10 feet ABB
NKLS02-5 Super Loop Cable ABB
NKLS0-10 Plant Loop Interface Cable ABB
NKLS11-10 Infi-net Interface Cable -10 feet ABB
NKLS11-11 Infi-net Interface Cable - 11 feet ABB
NKLS11-12 Infi-net Interface Cable - 12 feet ABB
NKLS11- Infi-net Interface Cable - feet ABB
NKLS11-5 Infi-net Interface Cable -5 feet ABB
NKLS11-7 Infi-net Interface Cable -7 feet ABB
NKLS11-8 Infi-net Interface Cable -8 feet ABB
NKLS11-9 Infi-net Interface Cable -9 feet ABB
NKMF02-02 MFC Redundancy Cable ABB
NKMP01-2 MFP Redundancy Cable ABB
NKMP01-4 MFP Redundancy Cable ABB
NKMP01-5 MFP Redundancy Cable ABB
NKMP01-6 MFP Redundancy Cable ABB
NKMP0-1 MFP Redundancy Cable ABB
NKMP11-2 MFP Redundancy Cable ABB
NKMP11- Redundancy Cable - Ft ABB
NKMP11-4 Redundancy Cable - 4 Ft ABB
NKMP11-5 MFP Redundancy Cable - 5 foot ABB
NKPL01- Twinax Plant Loop Cable ABB
NKSB01-1 Ribbon Cable ABB
NKSB01-2 Ribbon Cable ABB
NKSB01- Ribbon Cable ABB
NKSE01-2 198448 Serial Extension Cable ABB
NKTL01- Coax Termination Cable ABB
NKTM01-10 I/O Module to Termination Module Ribbon Cable ABB
NKTM02-5 Expansion Cable for High Density TU ABB
NKTT01-2 Infi-Net Termination Cable ABB
NKTT01- Infi-Net Termination Cable ABB
NKTT01-4 Infi-Net Termination Cable ABB
NKTT01-8 Infi-Net Termination Cable ABB
NKTU01-009 9' Termination loop Cable Bailey
NKTU01-10 I/O Module to Termination Unit Cable ABB
NKTU01-11 I/O Module to Termination Unit Cable ABB
NKTU01-12 I/O Module to Termination Unit Cable ABB
NKTU01-1 I/O Module to Termination Unit Cable ABB
NKTU01-14 I/O Module to Termination Unit Cable ABB
NKTU01-15 I/O Module to Termination Unit Cable ABB
NKTU01-16 I/O Module to Termination Unit Cable ABB
NKTU01-18 I/O Module to Termination Unit Cable ABB
NKTU01-20 I/O Module to Termination Unit Cable ABB
NKTU01-3 I/O Module to Termination Unit Cable ABB
NKTU01-4 I/O Module to Termination Unit Cable ABB
NKTU01-5 I/O Module to Termination Unit Cable ABB
NKTU01-6 I/O Module to Termination Unit Cable ABB
NKTU01-7 I/O Module to Termination Unit Cable ABB
NKTU01-8 I/O Module to Termination Unit Cable ABB
NKTU01-9 I/O Module to Termination Unit Cable ABB
NKTU02-007 I/O Module to Termination Module Cable ABB
NKTU02-10 I/O Module to Termination Module Cable ABB
NKTU02-11 I/O Module to Termination Module Cable ABB
NKTU02-13 I/O Module to Termination Module Cable ABB
NKTU02-15 I/O Module to Termination Module Cable ABB
NKTU02-17 I/O Module to Termination Module Cable ABB
NKTU02-9 I/O Module to Termination Module Cable ABB
NKTU11-011 I/O Cable 10' ABB
NKTU11-09 I/O Module to Termination Unit Cable ABB
NKTU11-10 I/O Module to Termination Unit Cable ABB
NKTU11-11 I/O Module to Termination Unit Cable ABB
NKTU11-12 I/O Module to Termination Unit Cable ABB
NKTU11-13 I/O Module to Termination Unit Cable ABB
NKTU11-15 I/O Module to Termination Unit Cable ABB
NKTU11-16 I/O Module to Termination Unit Cable ABB
NKTU11-17 I/O Module to Termination Unit Cable ABB
NKTU11-20 I/O Module to Termination Unit Cable ABB
NKTU11-24 I/O Module to Termination Unit Cable ABB
NKTU11-8 I/O Module to Termination Unit Cable ABB
NLIM02 Loop Interface Module ABB
NLIS01 Loop Interface Slave ABB
NLMM01 Logic Master Module ABB
NLMM02 Logic Master Module ABB
NLSM01 Network 90 Loop Storage ABB
NLSM02 Loop Storage Module ABB
NLWC-03 Field Kit ABB
NLWC-05 Field Kit ABB
NLWC-05-KIT Field Kit ABB
NLWC-07 Field Kit ABB
NLWC-07-KIT Field Kit ABB
NLWC-10 Field Kit ABB
NLWC-10-KIT Field Kit ABB
NMBA-01 ModBus Adapter ABB
NMC86 57287641 Main Voltage Drive ABB
NMFC01 Multifunction Controller ABB
NMFC02 Multi-Function Controller ABB
NMFC03 Enhanced Multi-Function Controller ABB
NMFC04 Multifunction Controller - NET 90 ABB
NMFC05 Multifunction Control Module ABB
NMPC01 PC90 Processor Module ABB
NMPP02 Module Power Panel ABB
NMRT01 Manual Redundancy Transfer Switch ABB
NOCH-0016-62 Output Chokes ABB
NOCH-0016-65 Output Chokes ABB
NOCH-0030-62 Output Chokes ABB
NOCH-0030-65 Output Chokes ABB
NOCH-0070-62 Output Chokes ABB
NOCH-0070-65 NOCH-0070-65 ABB
NOCH0030-62 Filter Module ABB
