SHANDONG BETTER ONWARD MACHINERY CO., LTD.  

Product Name: DN18-250/80 Single Hydraulic Prop for Supporting Coal Mine Working Face Model NO.: DN18-250/80 Material: 27simn Seamless Steel Pipe and Heavy Duty Forgings Manufacturing Process: Forging Surface Treatment: Spray-Paint Standard: GB Certification: CE, Mt112.1-2006 Standard State: New Max. Height: 1800+/-20mm Min. Height: 1200mm Working Stroke: 600+/-20mm Rated Working Resistance: 250kn Oil Cylinder Inner Diameter: 80mm Delivery Time: Within 2-3 Days Trademark: better onward Transport Package: Pallet Specification: 45kg Origin: China HS Code: 7308900000 Product Description Introduction of DN type hydraulic propSpecification: DN(04-18)-250/80,DN(20-22)-300/90,DN(25-28)-250/90,DN(31.5-35)-160/90,DN(35-45)-150/110.DN type internal injection single hydraulic prop adopt domestic high-quality 27SiMn seamless steel pipe and heavy duty forgings to make.Our factory has perfect quality management system.The finished products are tested strictly according to the MT112.1-2006 standard, with reliable quality and excellent performance.DN (06-45) series prop internally equipped with safety valve to maintain the constant resistance load of the prop.It could be used with the metal articulated roof beam and the suspended bracket top beam and could also be used as a pillar for supporting the roof of the general mechanization coal mines working face and could be use for supporting comprehensive mechanical coal mining working face endand other temporary support.Parameters of DN type hydraulic prop SpecificationItem DN04DN05DN06DN08DN10DN12DN14DN16DN18Max. height (mm)410±10510±10650±10800±101000±101200±201400±201600±201800±20Min. height (mm)340390510590700850100011001200Working stroke (mm)70±10120±10140±10210±10300±10350±20400±20500±20600±20Rated working resistance (KN)250Rated working oil pressure (MPa)49Oil cylinder inner diameter (mm)80Initial support force (kN)4968.7-78.5base area (cm2)120Max. operation torque when initial bracing acting on Handlebar's (N.m)<200Prop's rise height when handlesbars sway one time full stroke no-load(mm)≥12≥20Prop lower speed (mm/s)>20>30Working medium 5# hydraulic oilWeight (kg)182023262934384145Applicable coal seam thickness (m)0.40.50.60.7-0.80.9-1.01.1-1.21.3-1.41.4-1.61.5-1.8 Item DN20DN22DN25DN28DN31.5DN35DN35DN38DN40DN42DN45Max.height±20mm20002240250028003150350035003800400042004500Min.height(mm)13901540180021002450280028003100330035003800Workingstroke±20mm610700Ratedworkingresistance(KN)300250160150Ratedworkingoilpressure(MPa)46.339.325.115.7Oilcylinderinnerdiameter(mm)90110Initialsupportforce(kN)68.7-78.5basearea(cm2)129147Max.operationtorquewheninitialbracingactingonHandlebar's (N.m)<200Prop'sriseheightwhenhandlesbarsswayonetimefullstrokeno-load(mm)≥20Proplowerspeed(mm/s)>30Workingmedium5#hydraulicoilWeight(kg)556068747886919599113119Applicablecoalseamthickness(m)1.6-2.01.8-2.22.1-2.52.4-2.82.75-3.153.15-3.53.3-3.83.5-43.7-4.24.0-4.5Images of DN type hydraulic propWorkshop