PFCL201CD-20.0 3BSE029774R20 20.0 (4500)
PFCL201CE-20.0 3BSE027062R20 20.0 (4500)
PFCL201C-50.0 3BSE027070R50 50.0 (11250)
PFCL201CD-50.0 3BSE029774R50 50.0 (11250)
PFCL201CE-50.0 3BSE027062R50 50.0 (11250)
励磁单元 PFVI401 3BSE018732R1
控制单元 PFXA401 3BSE024388R1
隔离放大器 PXUB201 3BSC630149R1
匹配单元 PFVO142 3BSE023732R1
匹配单元 PFVO143 3BSE023150R1
操作单元 PXAH401 3BSE017235R1
操作单元 PXAH402 3BSE017236R1
控制单元 PFVA401 3BSE024389R1
PFEA 113, IP 65
PFEA 111-20
PFEA 112-20
PFEA 113-20
PFEA 111-65
PFEA 112-65
PFEA 113-65
PFEA 113-65.1PXV
PFEA 113-65.2PXV
PFEA 113-65.3PXV
PFEA 113-65.4PXV
PFEA 113-65.1PXC
PFEA 113-65.2PXC
ALLEN BRADLEY 140-GS2125 / 140GS2125 (RQANS1)
ALLEN BRADLEY 705-TOD23 / 705TOD23 (USED TESTED CLEANED)
ALLEN BRADLEY JA1N056S505UA / JA1N056S505UA (NEW IN BOX)
ALLEN BRADLEY 40768-490-08 / 4076849008 (USED TESTED CLEANED)
ALLEN BRADLEY 599-SS09OJ / 599SS09OJ (RQANS1)
ALLEN BRADLEY 1-L01 / 1L01 (USED TESTED CLEANED)
ALLEN BRADLEY 889N-U8AF-5 / 889NU8AF5 (USED TESTED CLEANED)
ALLEN BRADLEY JA1N056S153UA / JA1N056S153UA (USED TESTED CLEANED)
ALLEN BRADLEY 800R-2HW4R-41577 / 800R2HW4R41577 (NEW IN BOX)
ALLEN BRADLEY 1771-OM / 1771OM (USED TESTED CLEANED)
ALLEN BRADLEY 85-A81 / 85A81 (USED TESTED CLEANED)
ALLEN BRADLEY 800H-HR2BP / 800HHR2BP (NEW IN BOX
ALLEN BRADLEY 365-A387238-1 / 365A3872381 (USED TESTED CLEANED)
ALLEN BRADLEY 141A-SM54-RS45 / 141ASM54RS45 (USED TESTED CLEANED)
ALLEN BRADLEY 190-N2 / 190N2 (USED TESTED CLEANED)
ALLEN BRADLEY 21A244 / 21A244 (RQANS2)
ALLEN BRADLEY 505-BOD-A2G / 505BODA2G (USED TESTED CLEANED)
ALLEN BRADLEY 700-RM220A1 / 700RM220A1 (NEW NO BOX)
ALLEN BRADLEY Z-36608 / Z36608 (USED TESTED CLEANED)
ALLEN BRADLEY JA1N200P101UA / JA1N200P101UA (NEW IN BOX)
ALLEN BRADLEY 700-PSTA1 / 700PSTA1 (NEW IN BOX)
ALLEN BRADLEY P7 / P7 (NEW NO BOX)
ALLEN BRADLEY B7615 / B7615 (USED TESTED CLEANED)
ALLEN BRADLEY 42SMP-7320 / 42SMP7320 (USED TESTED CLEANED)
ALLEN BRADLEY 2112B-BA-BD25J / 2112BBABD25J (NEW NO BOX)
ALLEN BRADLEY HA-060 / HA060 (USED TESTED CLEANED)
ALLEN BRADLEY 6189V-25HDDST100 / 6189V25HDDST100 (NEW IN BOX)
ALLEN BRADLEY 194R-HSG1 / 194RHSG1 (NEW IN BOX)
ALLEN BRADLEY 702-TAD92 / 702TAD92 (USED TESTED CLEANED)
ALLEN BRADLEY 1415-N50 / 1415N50 (USED TESTED CLEANED)
ALLEN BRADLEY 1012 / 1012 (USED TESTED CLEANED)
ALLEN BRADLEY 855T-B20DN3 / 855TB20DN3 (USED TESTED CLEANED)
为什么双座阀小开度工作时容易振荡?对单芯而言,当介质是流开型时,阀稳定性好;当介质是流闭型时,阀的稳定性差。双座阀有两个阀芯,下阀芯处于流闭,上阀芯处于流开,这样,在小开度工作时,流闭型的阀芯就容易引起阀的振动,这就是双座阀不能用于小开度工作的原因所在。为什么双密封阀不能当作切断阀使用?双座阀阀芯的优点是力平衡结构,允许压差大,而它突出的缺点是两个密封面不能同时良好接触,造成泄漏大。如果把它人为地、强制性地用于切断场合,显然效果不好,即便为它作了许多改进(如双密封套筒阀),也是不可取的。