產(chǎn)品詳情
為此,測(cè)量斷面離來(lái)流方向的彎頭、閥門、變徑異形管等局部構(gòu)件要大于4倍管道直徑。離下游方向的局部彎頭、變徑結(jié)構(gòu)應(yīng)大于2倍管道直徑。皮托管測(cè)量的直徑規(guī)格選擇原則是與被測(cè)管道直徑比,不大于.2。以免產(chǎn)生干擾,使誤差增大。測(cè)量時(shí)不要讓皮托管靠近管壁。L型標(biāo)準(zhǔn)皮托管測(cè)量時(shí)應(yīng)當(dāng)將全壓孔對(duì)準(zhǔn)氣流方向,以指向桿指示,靜壓在氣流的垂直方向上。測(cè)量點(diǎn)插入孔應(yīng)避免漏風(fēng),可防止該斷面上氣流干擾。S型防堵皮托管測(cè)量時(shí)應(yīng)當(dāng)將全壓孔對(duì)準(zhǔn)氣流方向,靜壓孔背對(duì)著氣流方向按管道測(cè)量技術(shù)規(guī)范,合理選擇測(cè)量斷面的測(cè)點(diǎn)。
BALLUFF BES-517-132-M7-H (Used, Cleaned, Tested 2 year warranty)
BALLUFF BES-516-542-BO-H-05 (Surplus New In factory packaging)
BALLUFF BES-516-542-BO-H-05 (Surplus New In factory packaging)
BALLUFF BES-515-356-SK-C (Used, Cleaned, Tested 2 year warranty)
BALLUFF BES-515-356-SK-C (Used, Cleaned, Tested 2 year warranty)
BALLUFF BLS 18KW-XX-1P-L-02 BEAM PHOTOELECTRIC EMITTER *NEW IN A FACTORY BAG*
BALLUFF BLS 18KW-XX-1P-L-02 BEAM PHOTOELECTRIC EMITTER *NEW IN A
BALLUFF RXD-0801-J-01-S712-1 (Surplus New not in factory packaging)
BALLUFF RXD-0801-J-01-S712-1 (Surplus New not in factory packaging)
BALLUFF BMO-A01-J-PU-CS-75 (Used, Cleaned, Tested 2 year warranty)
BALLUFF BES-516-324-SA-26-05 (Surplus New In factory packaging)
BALLUFF BES-516-324-SA-26-05 (Surplus New In factory packaging)
BALLUFF BOS-S50-PL-5-C01-PP (Surplus New In factory packaging)
BALLUFF BKS-S22-MIB-6-PU-05 (Surplus New In factory packaging)
BALLUFF BKS-S22-MIB-6-PU-05 (Surplus New In factory packaging)
BALLUFF BCS-012-NSB1-L-S4 (Used, Cleaned, Tested 2 year warranty)
BALLUFF BCS-012-NSB1-L-S4 (Used, Cleaned, Tested 2 year warranty)
BALLUFF BCS-M30-KN2-UST15G-AV02 (Surplus New In factory packaging)
BALLUFF BLS-35K-XX-OH-BO-L (Surplus New not in factory packaging)
BALLUFF C21BE3-00-TY-300F (Surplus New In factory packaging)
BALLUFF BNS-519-X496-100-P13 (Surplus New In factory packaging)
BALLUFF BNS-519-X496-100-P13 (Surplus New In factory packaging)
BALLUFF BES-516-343-SA16-C-PU-03 (Surplus New In factory packaging)
BALLUFF BCS034-WO-5-L3 (Surplus New not in factory packaging)
BALLUFF BCS034-WO-5-L3 (Surplus New not in factory packaging)
BALLUFF BNS-542-B04-D12-72-10 (Surplus New In factory packaging)
BALLUFF BESQ08ZC-NSC20B-BP06 (Surplus New not in factory packaging)
BALLUFF BESQ08ZC-NSC20B-BP06 (Surplus New not in factory packaging)
BALLUFF BES-516-300-S295/1.025"-S4 (Surplus New not in factory packaging)
Balluff Photoelectric Sensor BOS 26K-PA-1HC-S4-C Used #38923
Balluff BES 516 420 E4 L Sensor BES516420E4L - Used
Balluff BES 516 420 E4 L Sensor BES516420E4L - Used
BALLUFF BES-516-325-E5-R5 (Used, Cleaned, Tested 2 year warranty)
BALLUFF BNS-519-FD-60-111 (Used, Cleaned, Tested 2 year warranty)
BALLUFF BNS-519-FD-60-111 (Used, Cleaned, Tested 2 year warranty)
BALLUFF BNS-819-B03-D12-72-10 (Surplus New In factory packaging)
BALLUFF BNI-PBS-104-000-Z001 (Used, Cleaned, Tested 2 year warranty)
Balluff BES 516-324-E4-C-S4-00,2 Scratch & Dent #62627
BALLUFF BNS-819-B04-D08-46-13 (Surplus New In factory packaging)
BALLUFF BNS-819-B04-D08-46-13 (Surplus New In factory packaging)
BALLUFF BES-515-420-S21-L (Surplus New In factory packaging)
3HNE 00324-1
3HNE 00325-1
3HNE 00327-1保證全新原裝,沖量大促銷!
3HNE 00330-1
3HNE 00331-1
3HNE 00332-1
3HNE 00333-1
3HNE 00335-1
3HNE 00340-1
3HNE 00347-1
3HNE 00378-1
3HNE 00413-1
3HNE 00414-1
3HNE 00421-1保證全新原裝,沖量大促銷!
3HNE 00451-1
3HNE 00471-1
3HNE 00496-1
3HNE 00506-1
3HNE 00554-1
3HNE 00574-1
3HNE 00578-1
3HNE 00589-1
3HNE 00598-1
3HNE 00600-1
3HNE 00601-1
3HNE 00609-1
3HNE 00625-1
3HNE 00628-1保證全新原裝,沖量大促銷!
Allen Bradley 800E-D3 Lamp Module 800ED3
ALLEN BRADLEY 5130-KA /A INTERFACE MODULE
ALLEN BRADLEY 700-PK400A1 U 20A 600V 4 Coil120 VACV USED
Allen-Bradley #100-C12 -FREE SHIPPING 30 day Warranty
Allen Bradley 140-MN-0400 SER D
ALLEN BRADLEY 800MR-B2 SER. A UNMP
ALLEN-BRADLEY COMPACT IO 1769-ECR SER A REV 2
USED ALLEN BRADLEY 800S-3SB PUSH BUTTON STATION 800S3SB
ALLEN BRADLEY 700DC-P800Z24 RELAY, HEAVY-DUTY INDUSTRIAL, USIP
ALLEN BRADLEY 160-BMB1 DYNAMIC BRAKE MODULE
1793IB16 1793-IB16 Allen Bradley Flexbus 24 VDC Sink Input
Allen Bradley 1771asbd Modul Gebraucht
ALLEN-BRADLEY 1771-0B 17710B SERIES C
ALLEN BRADLEY 1492-GH025 SER. B NSMP
ALLEN BRADLEY 700-PLLA1 SER. B MECHANICAL LATCH UNIT * USED *
Allen Bradley 140M-C-TE 140M-D8E
ALLEN BRADLEY 800T-FXP16XA1 SER N SELECTOR SWITCH
ALLEN BRADLEY 1771-OBD SER. B 10-60VDC OUTPUT MODULE 1771-OBD/B
ALLEN BRADLEY 8-592 SER B PLUG IN MODULE *USED*
Allen Bradley 193-A124 rele 66-110 A. Made in USA.
ALLEN BRADLEY 700-P200A1 SER. A AC RELAY 115-120V (AS PICTURED) * USED *
Allen Bradley 2A83 Coil 240 V 60 HZ Used MIssing Screw
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什么直行程調(diào)節(jié)閥防堵性能差,角行程閥防堵性能好?直行程閥閥芯是垂直節(jié)流,而介質(zhì)是水平流進(jìn)流出,閥腔內(nèi)流道必然轉(zhuǎn)彎倒拐,使閥的流路變得相當(dāng)復(fù)雜(形狀如倒“S”型)。這樣,存在許多死區(qū),為介質(zhì)的沉淀提供了空間,長(zhǎng)此以往,造成堵塞。角行程閥節(jié)流的方向就是水平方向,介質(zhì)水平流進(jìn),水平流出,容易把不干凈介質(zhì)帶走,同時(shí)流路簡(jiǎn)單,介質(zhì)沉淀的空間也很少,所以角行程閥防堵性能好。為什么直行程調(diào)節(jié)閥閥桿較細(xì)?它涉及一個(gè)簡(jiǎn)單的機(jī)械原理:滑動(dòng)摩擦大、滾動(dòng)摩擦小。