產(chǎn)品詳情
蒸汽加熱加熱溫度在1℃以下時(shí),可用一個(gè)大氣壓以下的蒸汽來加熱;~18℃范圍內(nèi),用飽和蒸汽;當(dāng)溫度更高時(shí),可采用高壓過熱蒸汽。用其它介質(zhì)加熱若工藝要求必須在高溫下操作或欲避免采用高壓的加熱系統(tǒng)時(shí),可用其它介質(zhì)來代替水和蒸汽,如礦物油(275~3℃)、聯(lián)苯醚混合劑(沸點(diǎn)258℃)、熔鹽(14~54℃)、液態(tài)鉛(熔點(diǎn)327℃)等。電加熱將電阻絲纏繞在反應(yīng)釜筒體的絕緣層上,或安裝在離反應(yīng)釜若干距離的特設(shè)絕緣體上,在電阻絲與反應(yīng)釜體之間形成了不大的空間間隙。
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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R越大,調(diào)節(jié)流量的范圍越寬,性能指標(biāo)就越好.通常閥的R=3,好的閥,如V型球閥、全功能閥,R可達(dá)1~2。小開度工作性能有些閥受到結(jié)構(gòu)的限制,小開度工作性能差,產(chǎn)生啟跳、振蕩,R變得很小(即Qmin很大),如雙座閥、襯膠蝶閥。好的閥小開度應(yīng)有微調(diào)功能,即可滿足很小流量的調(diào)節(jié),且工作又要求十分平衡,這類閥如V型球閥、偏心旋轉(zhuǎn)閥、全功能超輕型調(diào)節(jié)閥。流量系數(shù)Kv流量系數(shù)表示通過流量的能力,同口徑Kv值越大越好,尤其是球閥、蝶閥、全功能閥,它們的Kv值是單座閥、雙座閥、套筒閥的2~3倍。調(diào)節(jié)速度滿足系統(tǒng)對(duì)閥動(dòng)作的速度要求。2切斷功能切斷由閥的泄漏量指標(biāo)來表示,切斷通常指泄漏量小于.1%,它反映閥的內(nèi)在的質(zhì)量.在閥的使用中,對(duì)國產(chǎn)閥泄漏量大的呼聲反映很大。3克服壓差功能它通常用閥關(guān)閉時(shí)的允許壓差來表示,允許壓差越大,此功能也就越好。如果考慮不周到,閥芯就會(huì)被壓差頂開,造成閥關(guān)不到位,泄漏量超標(biāo)。保證閥切斷就必須克服閥關(guān)閉時(shí)的工作壓差。通常單密封閥的允許壓差小,如單座閥、角形閥、隔膜閥、三通閥;雙密封的閥和轉(zhuǎn)動(dòng)類的閥的允許壓差大,如雙座閥、套筒閥、球閥、全功能超輕型閥。