Hollw hydraulic jack

    Product Description   Hollw hydraulic jack is a specialized machine for prestressing engineering. It can be applied both to pre-tension and post-tension project. Using different models, you can simultaneously stretch a bunch of 2 to 22 strands. The nominal tensile force is 65t up to 1000t.   Our YDC series hollw hydraulic jack is a product by our independent research and development. After tens of years’ improvement, it is compact in size, smooth and steady while working, and very reliable in leak tightness and service life.   The Hollw hydraulic jack is powered by our ZB series high-pressure electric oil pump.     Structure         Specification  

Model	Rated Tension	Stroke	Tension cylinder area	Rated oil pressure	Weight	Size
	KN	mm	mm2	MPa	Kg	mm
YDC650	650	200	13253	50	44	Ø 190×320
YDC1200	1200	200	24327	50	75	Ø 245×325
YDC1500	1500	200	30257	50	91	Ø 270×332
YDC2000	2000	200	37791	53	110	Ø 297×342
YDC2500	2500	200	46181	54	133	Ø 325×347
YDC3000	3000	200	56347	54	180	Ø 375×362
YDC3500	3500	200	64795	54	218	Ø 417×362
YDC4000	4000	200	73434	55	280	Ø 424×365
YDC4600	4600	200	84528	55	316	Ø 472×374
YDC5000	5000	200	93717	54	376	Ø 500×392
YDC6000	6000	200	106814	56	480	Ø 540×410
YDC6500	6500	200	124112	53	550	Ø 580×434
YDC10000	10000	200	202318	50	1450	Ø 590×740

       Model Selection   1. Considering the loss of tensile force by resistance, the stressing jack outputs about 95% of nominal tensile force. If the jack needs strict and continuous working, we recommend higher nominal tensile force than the load, by about 20%.   2. The diameter of center hole shall be 17mm larger than the outer circle of taper holes.   3. In order for your convenience, we made a table of model selection for stretching 1860Mpa Ø15.24mm strands at 0.85Fptk tensile force.       How to Use  

1. Preparing
	1. Clean the rust on the strands; 2. Install the working anchor; 3. Install the grippers and tighten them.
2. Install the stressing jack and tooling anchor
	1. Install the spacing ring; 2. Install the stressing jack, and connect it to the oil pump; 3. Install the tooling anchor and grippers.
3. Stressing
	1. Pre-tension the strands and record the initial data; 2. Adjust the position of the stressing jack and let it coaxial with the anchor; 3. Feeding oil to the jack until the pressure rises to set data; 4. Measure the elongation of the strands and record the process.
4. Anchoring
	1. Slowly open the stop valve of feeding circuit, the cylinder will return and the grippers will grasp the strands; 2. Close the stop valve of returning circuit, return the oil to the tank; 3. Remove the grippers, tooling anchor, stressing jack  and the spacing ring.
5. Seal the anchor.
	1. Cut the strands at 50mm from the anchor, and seal the anchor with concrete; 2. Grout the duct with mortar within 48h; 3. Smoothen the end with concrete.

    About CPS   CPS is short for CMEC PRESTRESS SYSTEM (TM). It contains all kinds of prestressing jacks, oil pumps, duct making and processing machines, fix-end anchor making machines, as well as all kinds of anchorage, couplers, ducts (metal and plastic corrugated pipes), PC strands, as well as mortar mixers and pumping system. We are a one-stop supplier and servicer for your prestressing project. The CPS is widely adopted in highway bridges, railway bridges, dams, high-raise buildings and so on.      Product Details                        Related Products

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