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Hydraulic Stressing Jack
Descriptions of Hydraulic Stressing Jack:
1. It is suitable for the tension of group anchors with ********0 sizes, î¦*5.*4, î¦*2.7 strands.
2. In some certain circumstance it can be used in the working of pushing, jacking and transforming and so on.
3. Easy to operate and used widely.
 Notice: according to users' requirement, YDC prestressing jack can be configured

Features of post tensioning jacks:
YDC feed-through jacks are the new designed products in our company, are the upgrades of the primary jacks.
1. Using the new seals, to synchronous strengthen the seal-ability under great pressure.
2. Using special alloy steel with heat treatment process, reducing the cylinder's expansion ratio in the tensioning process. So that the life of seals and sealing performance can be improved about *0%.
3. In the tensioning the operating process, multi Strand Jacks is easily damaged under overpressure because of the jack-based pullback clinder, so we added the overpressure valve on the jacks to pressure production. Meanwhile we improved the original of commonly used structure by wire disc and flanged disc, to make the bearing capacity for oil pressure strengthen. So that enormously reduce the possibility of mechanical damage due to improper operation. 
In the word, the YDC series feed-through jacks' performance is improved, and widely used in pre-stressing and poststressing construction.
Parameters of post tensioning hydraulic jack: