Double Telescopic Column of Hydraulic Support is a part which jions the beam and base,bearing the load of crown plate,It is the main load bearing part,including two forms: all-hydraulic and mechanically lengthening. Our company is one of the biggest hydraulic cylinder manufacturer in China,specialized in design, R & D and manufacturing of hydraulic machinery products etc, including over 120 kinds. Now it has been the largest manufacturing base of hydraulic cylinders in Shandong Province, with its annual production capacity of 200,000 sets. 3. prouce line 700 sets manufacturing equipment,such as cold drawing production line ,heat treatment production line ,surface treatment production line,testing equipment,various digital-control machining equipment,gantry style linear electroplating production line. 4. quality guarantee system Program before Delivery 1. Trial Operation Test 2. Start-up Pressure Test 3. Pressure-Tight Test 4. Leak Test 5. Full Stroke Test 6. Buffer Test 7. Testing the Effect of Limit 8. Load Efficiency Test 9. Reliability Test Every piece of Hydraulic Cylinder are tested and will send out only after they are pasted the each test. Our company has abundant technical force and perfect testing means. By making wide technical and business cooperation with many related enterprises, universities, colleges and institutes both at home and abroad, and employing senior engineers and software engineers, we have greatly strengthened and improved our designing, processing, and testing abilities. 5. certificates and glories FAQ Q1:What's the brand name of your products ? A:Generally,we use our own brand "WTJX",OEM is also available as required. Q2:Hydraulic cylinder internal leakage? A: There are 3 main reasons causing internal leakage :Overload,polishing is not well controlled,bad seal kits.As is known to all,vehicles in China are often overload,our products all designed to bear the overload power.We have numerical control machine to assure the polish processing .And we use the imported seals to meet customers' demands. Q3:Does your piston rod get ruptured easily? A: Hard chrome plating quenched and tempered 45# steel for piston rod to assure sufficient hardness and toughness. Q4:Is your design reasonable? What about your product safe coefficient? A:We have R&D team with abundant design experience. We also established production, education, and research cooperation with universities . Rest assured. Q5:What about the quality feedback of your products? A: Guarantee the quality from the raw material. We have cold drawing production line and nickel-chrome electroplating production line , so we can produce cold-drawing pipe and hard-chrome pipe used for hydraulic cylinder. !!! WE HAVE NEVER RECEIVED EVEN ONCE QUALITY COMPLAINT FOR MANY YEARS OF INTERNATIONAL TRADE. Q6:Is the sample free? A:Yes.In our acceptable range, we can offer a sample by charging freight. And we will return the fee after you place bulk order. Q7:How about the delivery time? A: Over 700 sets advanced equipments to meet customer's large demand in short delivery time.Generally ,it's 7-15 days. Q8:What 's the after-service? A:If the quality can’t meet your requirement ,we will pay all your lost and offer technical support to solve your problem!!! Q9:How can I contact with you ? A:Mobile phone:+86-14706338570 (Any time call available)
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