Kelly valve also named Kelly cock or drill pipe safety valve. It is a hand control valve in drill string circulating system and it is one of the effective tools to prevent blowout. Kelly valve is divided into Upper Kelly Valve and Lower Kelly Valve. Upper Kelly Valve is connected between Swivel sub and Kelly. Lower Kelly valve is connected between lower end of Kelly and top of drill pipe or lower end of Kelly save sub. Rotating the wrench of full opening safety valve 90° to realize on and off. In the drilling operation, in order to avoid malignant accidents, Kelly valves should be connected to both end of Kelly to prevent loss of drilling flid and blowout. Plug Valve,Low Torque Valve,Flowline Plug Valve,Plug Valve Oilwell Cementing Henan Youlong Petroleum Engineering Technology Co.,Ltd , https://www.youlongenergy.com
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MICROSCOPE XSP-13A
Objectives
10X,40X(S),100X(S,OIL)
Eyepiece
5X,10X,12.5X
Eyepiece head
monucular head
Nosepiece
Triple
Stage
stage+moving scale
Illumination
reflecting mirror (insert illumination for option)
Warranty time : Â 1 year
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Packaging & Shipping
 Paper packing, wooden packing or Foam packing,as your requirement.Â
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Company Information
Wincom Company Ltd. is a prfessional leading enterprisespecializing the manufacturing and supplyÂ
of Laboratoy Equipments and Medical Equipments.We have our own factory to provide best qualityÂ
products.We have 20 years exporting experience ,and established business relationship with 50Â
countries an regions in Africa,America,Europe and Asia, and win high reputation in the internation market.
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Our products including three ranges, please kindly find the details as below:
1)Laboratory Equipments: Microscope,Centrifuge,Water Bath,Stirrer Hotplate,Autoclave&sterilizer,Â
(UV, VIS, UV/VIS) Spectrophotometer, Incubator & Oven and so on.
2)Medical Equipments:Infant Incubator and Warmer, Xray Machine, Ultrasound Scanner, AnesthesiaÂ
Machine, Medical Ventilator, Suction Apparatus,ECG Hematology Analyzer and so on.
3)Medical Furnitures:Â Operating Table, Hospital & Examination Bed, Wheel Chair, Bedside Cabinet,
Trolley, Arm Crutches, Stretcher and so on.Â
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We'll attended MANY MEDICAL FAIRS in many countries every year, such as Singapore, Dubi,Amercia, like  Medical Fair Asia ,Medical West Africa , FIME and so on.Â
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1250X Student Microscope Xsp-13A Lab Equipment
Model NO.: XSP-13A
Usage: Teaching
Principle: Optics
Principle of Optics: Polarizing Microscope
Achromatic Objectives: 10X, 40X (S), 100X (S, Oil)
Eyepiece: 5X10X12.5X
Trademark: WINCOM
Transport Package: Cartons
Specification: ISO
Origin: China
HS Code: 9011800090
XSP-13A 1250X Labratory microscope: